JP7395919B2 - Polymer coated silicone particles - Google Patents
Polymer coated silicone particles Download PDFInfo
- Publication number
- JP7395919B2 JP7395919B2 JP2019181160A JP2019181160A JP7395919B2 JP 7395919 B2 JP7395919 B2 JP 7395919B2 JP 2019181160 A JP2019181160 A JP 2019181160A JP 2019181160 A JP2019181160 A JP 2019181160A JP 7395919 B2 JP7395919 B2 JP 7395919B2
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- JP
- Japan
- Prior art keywords
- polymer
- silicon particles
- silicon
- methacrylate
- slurry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229920000642 polymer Polymers 0.000 title claims description 116
- 239000002245 particle Substances 0.000 title description 39
- 229920001296 polysiloxane Polymers 0.000 title description 28
- 239000011856 silicon-based particle Substances 0.000 claims description 131
- 229910052710 silicon Inorganic materials 0.000 claims description 75
- 229920001688 coating polymer Polymers 0.000 claims description 15
- 239000004793 Polystyrene Substances 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 229920002223 polystyrene Polymers 0.000 claims description 7
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 6
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 6
- 229920002319 Poly(methyl acrylate) Polymers 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 229910020175 SiOH Inorganic materials 0.000 claims description 4
- 239000002002 slurry Substances 0.000 description 69
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 68
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 68
- -1 n -Butyl Chemical group 0.000 description 68
- 239000010703 silicon Substances 0.000 description 68
- 229920000058 polyacrylate Polymers 0.000 description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 46
- 238000000034 method Methods 0.000 description 32
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 24
- 230000008569 process Effects 0.000 description 19
- 239000000178 monomer Substances 0.000 description 18
- 239000002253 acid Substances 0.000 description 17
- 239000007788 liquid Substances 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 14
- 238000000576 coating method Methods 0.000 description 14
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 13
- 239000005543 nano-size silicon particle Substances 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 12
- 239000011324 bead Substances 0.000 description 12
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 description 11
- 239000007787 solid Substances 0.000 description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- 239000002270 dispersing agent Substances 0.000 description 10
- 230000004048 modification Effects 0.000 description 10
- 238000012986 modification Methods 0.000 description 10
- 238000003756 stirring Methods 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 229920002125 Sokalan® Polymers 0.000 description 9
- 238000003917 TEM image Methods 0.000 description 9
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 7
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 7
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 7
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium peroxydisulfate Substances [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 7
- VAZSKTXWXKYQJF-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)OOS([O-])=O VAZSKTXWXKYQJF-UHFFFAOYSA-N 0.000 description 7
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 7
- 238000006116 polymerization reaction Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 6
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 239000004584 polyacrylic acid Substances 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- WDQMWEYDKDCEHT-UHFFFAOYSA-N 2-ethylhexyl 2-methylprop-2-enoate Chemical compound CCCCC(CC)COC(=O)C(C)=C WDQMWEYDKDCEHT-UHFFFAOYSA-N 0.000 description 5
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 5
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 239000000908 ammonium hydroxide Substances 0.000 description 5
- 239000011246 composite particle Substances 0.000 description 5
- 239000012948 isocyanate Substances 0.000 description 5
- 239000003607 modifier Substances 0.000 description 5
- 229920001483 poly(ethyl methacrylate) polymer Polymers 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 5
- NHARPDSAXCBDDR-UHFFFAOYSA-N propyl 2-methylprop-2-enoate Chemical compound CCCOC(=O)C(C)=C NHARPDSAXCBDDR-UHFFFAOYSA-N 0.000 description 5
- 238000010926 purge Methods 0.000 description 5
- 238000010992 reflux Methods 0.000 description 5
- SJMYWORNLPSJQO-UHFFFAOYSA-N tert-butyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(C)(C)C SJMYWORNLPSJQO-UHFFFAOYSA-N 0.000 description 5
- 229920002554 vinyl polymer Polymers 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 229920001519 homopolymer Polymers 0.000 description 4
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 4
- 150000002513 isocyanates Chemical class 0.000 description 4
- 239000012046 mixed solvent Substances 0.000 description 4
- 238000006011 modification reaction Methods 0.000 description 4
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- 229920002239 polyacrylonitrile Polymers 0.000 description 4
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 4
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 4
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 4
- DTGKSKDOIYIVQL-WEDXCCLWSA-N (+)-borneol Chemical group C1C[C@@]2(C)[C@@H](O)C[C@@H]1C2(C)C DTGKSKDOIYIVQL-WEDXCCLWSA-N 0.000 description 3
- IEVADDDOVGMCSI-UHFFFAOYSA-N 2-hydroxybutyl 2-methylprop-2-enoate Chemical compound CCC(O)COC(=O)C(C)=C IEVADDDOVGMCSI-UHFFFAOYSA-N 0.000 description 3
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 3
- AGBXYHCHUYARJY-UHFFFAOYSA-N 2-phenylethenesulfonic acid Chemical class OS(=O)(=O)C=CC1=CC=CC=C1 AGBXYHCHUYARJY-UHFFFAOYSA-N 0.000 description 3
- GNSFRPWPOGYVLO-UHFFFAOYSA-N 3-hydroxypropyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCCO GNSFRPWPOGYVLO-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- IAXXETNIOYFMLW-COPLHBTASA-N [(1s,3s,4s)-4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl] 2-methylprop-2-enoate Chemical compound C1C[C@]2(C)[C@@H](OC(=O)C(=C)C)C[C@H]1C2(C)C IAXXETNIOYFMLW-COPLHBTASA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 150000008064 anhydrides Chemical class 0.000 description 3
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 3
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 3
- FKIRSCKRJJUCNI-UHFFFAOYSA-N ethyl 7-bromo-1h-indole-2-carboxylate Chemical compound C1=CC(Br)=C2NC(C(=O)OCC)=CC2=C1 FKIRSCKRJJUCNI-UHFFFAOYSA-N 0.000 description 3
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 3
- 239000003999 initiator Substances 0.000 description 3
- 229940119545 isobornyl methacrylate Drugs 0.000 description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
- YSKIQSYEHUCIFO-UHFFFAOYSA-M lithium;4-ethenylbenzenesulfonate Chemical compound [Li+].[O-]S(=O)(=O)C1=CC=C(C=C)C=C1 YSKIQSYEHUCIFO-UHFFFAOYSA-M 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 229920005593 poly(benzyl methacrylate) Polymers 0.000 description 3
- 229920000205 poly(isobutyl methacrylate) Polymers 0.000 description 3
- 229920000193 polymethacrylate Polymers 0.000 description 3
- 229920005862 polyol Polymers 0.000 description 3
- 150000003077 polyols Chemical class 0.000 description 3
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 3
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 3
- BOQSSGDQNWEFSX-UHFFFAOYSA-N propan-2-yl 2-methylprop-2-enoate Chemical compound CC(C)OC(=O)C(C)=C BOQSSGDQNWEFSX-UHFFFAOYSA-N 0.000 description 3
- PNXMTCDJUBJHQJ-UHFFFAOYSA-N propyl prop-2-enoate Chemical compound CCCOC(=O)C=C PNXMTCDJUBJHQJ-UHFFFAOYSA-N 0.000 description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 description 3
- XFTALRAZSCGSKN-UHFFFAOYSA-M sodium;4-ethenylbenzenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C1=CC=C(C=C)C=C1 XFTALRAZSCGSKN-UHFFFAOYSA-M 0.000 description 3
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 description 2
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 description 2
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 2
- LMAUULKNZLEMGN-UHFFFAOYSA-N 1-ethyl-3,5-dimethylbenzene Chemical compound CCC1=CC(C)=CC(C)=C1 LMAUULKNZLEMGN-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 2
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 2
- MZGMQAMKOBOIDR-UHFFFAOYSA-N 2-[2-(2-hydroxyethoxy)ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOCCO MZGMQAMKOBOIDR-UHFFFAOYSA-N 0.000 description 2
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 2
- RPBWMJBZQXCSFW-UHFFFAOYSA-N 2-methylpropanoyl 2-methylpropaneperoxoate Chemical compound CC(C)C(=O)OOC(=O)C(C)C RPBWMJBZQXCSFW-UHFFFAOYSA-N 0.000 description 2
- CFVWNXQPGQOHRJ-UHFFFAOYSA-N 2-methylpropyl prop-2-enoate Chemical compound CC(C)COC(=O)C=C CFVWNXQPGQOHRJ-UHFFFAOYSA-N 0.000 description 2
- LZMNXXQIQIHFGC-UHFFFAOYSA-N 3-[dimethoxy(methyl)silyl]propyl 2-methylprop-2-enoate Chemical compound CO[Si](C)(OC)CCCOC(=O)C(C)=C LZMNXXQIQIHFGC-UHFFFAOYSA-N 0.000 description 2
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 description 2
- OFNISBHGPNMTMS-UHFFFAOYSA-N 3-methylideneoxolane-2,5-dione Chemical compound C=C1CC(=O)OC1=O OFNISBHGPNMTMS-UHFFFAOYSA-N 0.000 description 2
- URDOJQUSEUXVRP-UHFFFAOYSA-N 3-triethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CCO[Si](OCC)(OCC)CCCOC(=O)C(C)=C URDOJQUSEUXVRP-UHFFFAOYSA-N 0.000 description 2
- NDWUBGAGUCISDV-UHFFFAOYSA-N 4-hydroxybutyl prop-2-enoate Chemical compound OCCCCOC(=O)C=C NDWUBGAGUCISDV-UHFFFAOYSA-N 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- CNCOEDDPFOAUMB-UHFFFAOYSA-N N-Methylolacrylamide Chemical compound OCNC(=O)C=C CNCOEDDPFOAUMB-UHFFFAOYSA-N 0.000 description 2
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 description 2
- AOJOEFVRHOZDFN-UHFFFAOYSA-N benzyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC1=CC=CC=C1 AOJOEFVRHOZDFN-UHFFFAOYSA-N 0.000 description 2
- GCTPMLUUWLLESL-UHFFFAOYSA-N benzyl prop-2-enoate Chemical compound C=CC(=O)OCC1=CC=CC=C1 GCTPMLUUWLLESL-UHFFFAOYSA-N 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 239000012776 electronic material Substances 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 2
- WFKDPJRCBCBQNT-UHFFFAOYSA-N n,2-dimethylprop-2-enamide Chemical compound CNC(=O)C(C)=C WFKDPJRCBCBQNT-UHFFFAOYSA-N 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- RPQRDASANLAFCM-UHFFFAOYSA-N oxiran-2-ylmethyl prop-2-enoate Chemical compound C=CC(=O)OCC1CO1 RPQRDASANLAFCM-UHFFFAOYSA-N 0.000 description 2
- WRAQQYDMVSCOTE-UHFFFAOYSA-N phenyl prop-2-enoate Chemical compound C=CC(=O)OC1=CC=CC=C1 WRAQQYDMVSCOTE-UHFFFAOYSA-N 0.000 description 2
- 229920001496 poly(N,N'-methylenebisacrylamide) polymer Polymers 0.000 description 2
- 229920003213 poly(N-isopropyl acrylamide) Polymers 0.000 description 2
- 229920003991 poly(N-tert-butyl acrylamide) Polymers 0.000 description 2
- 229920003227 poly(N-vinyl carbazole) Polymers 0.000 description 2
- 229920000191 poly(N-vinyl pyrrolidone) Polymers 0.000 description 2
- 229920000779 poly(divinylbenzene) Polymers 0.000 description 2
- 229920000768 polyamine Polymers 0.000 description 2
- 229920000767 polyaniline Polymers 0.000 description 2
- 229920000120 polyethyl acrylate Polymers 0.000 description 2
- 229920000128 polypyrrole Polymers 0.000 description 2
- 229920002689 polyvinyl acetate Polymers 0.000 description 2
- 239000011118 polyvinyl acetate Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920002620 polyvinyl fluoride Polymers 0.000 description 2
- 229920006316 polyvinylpyrrolidine Polymers 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 2
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 2
- LYBIZMNPXTXVMV-UHFFFAOYSA-N propan-2-yl prop-2-enoate Chemical compound CC(C)OC(=O)C=C LYBIZMNPXTXVMV-UHFFFAOYSA-N 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 150000003376 silicon Chemical class 0.000 description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
- 235000012431 wafers Nutrition 0.000 description 2
- LTQBNYCMVZQRSD-UHFFFAOYSA-N (4-ethenylphenyl)-trimethoxysilane Chemical compound CO[Si](OC)(OC)C1=CC=C(C=C)C=C1 LTQBNYCMVZQRSD-UHFFFAOYSA-N 0.000 description 1
- RIPYNJLMMFGZSX-UHFFFAOYSA-N (5-benzoylperoxy-2,5-dimethylhexan-2-yl) benzenecarboperoxoate Chemical compound C=1C=CC=CC=1C(=O)OOC(C)(C)CCC(C)(C)OOC(=O)C1=CC=CC=C1 RIPYNJLMMFGZSX-UHFFFAOYSA-N 0.000 description 1
- VBQCFYPTKHCPGI-UHFFFAOYSA-N 1,1-bis(2-methylpentan-2-ylperoxy)cyclohexane Chemical compound CCCC(C)(C)OOC1(OOC(C)(C)CCC)CCCCC1 VBQCFYPTKHCPGI-UHFFFAOYSA-N 0.000 description 1
- HSLFISVKRDQEBY-UHFFFAOYSA-N 1,1-bis(tert-butylperoxy)cyclohexane Chemical compound CC(C)(C)OOC1(OOC(C)(C)C)CCCCC1 HSLFISVKRDQEBY-UHFFFAOYSA-N 0.000 description 1
- JNPCNDJVEUEFBO-UHFFFAOYSA-N 1-butylpyrrole-2,5-dione Chemical compound CCCCN1C(=O)C=CC1=O JNPCNDJVEUEFBO-UHFFFAOYSA-N 0.000 description 1
- HIDBROSJWZYGSZ-UHFFFAOYSA-N 1-phenylpyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C1=CC=CC=C1 HIDBROSJWZYGSZ-UHFFFAOYSA-N 0.000 description 1
- IEMBFTKNPXENSE-UHFFFAOYSA-N 2-(2-methylpentan-2-ylperoxy)propan-2-yl hydrogen carbonate Chemical compound CCCC(C)(C)OOC(C)(C)OC(O)=O IEMBFTKNPXENSE-UHFFFAOYSA-N 0.000 description 1
- YAQDPWONDFRAHF-UHFFFAOYSA-N 2-methyl-2-(2-methylpentan-2-ylperoxy)pentane Chemical compound CCCC(C)(C)OOC(C)(C)CCC YAQDPWONDFRAHF-UHFFFAOYSA-N 0.000 description 1
- RUMACXVDVNRZJZ-UHFFFAOYSA-N 2-methylpropyl 2-methylprop-2-enoate Chemical compound CC(C)COC(=O)C(C)=C RUMACXVDVNRZJZ-UHFFFAOYSA-N 0.000 description 1
- NFPBWZOKGZKYRE-UHFFFAOYSA-N 2-propan-2-ylperoxypropane Chemical compound CC(C)OOC(C)C NFPBWZOKGZKYRE-UHFFFAOYSA-N 0.000 description 1
- BQARUDWASOOSRH-UHFFFAOYSA-N 2-tert-butylperoxypropan-2-yl hydrogen carbonate Chemical compound CC(C)(C)OOC(C)(C)OC(O)=O BQARUDWASOOSRH-UHFFFAOYSA-N 0.000 description 1
- XYFRHHAYSXIKGH-UHFFFAOYSA-N 3-(5-methoxy-2-methoxycarbonyl-1h-indol-3-yl)prop-2-enoic acid Chemical compound C1=C(OC)C=C2C(C=CC(O)=O)=C(C(=O)OC)NC2=C1 XYFRHHAYSXIKGH-UHFFFAOYSA-N 0.000 description 1
- DOYKFSOCSXVQAN-UHFFFAOYSA-N 3-[diethoxy(methyl)silyl]propyl 2-methylprop-2-enoate Chemical compound CCO[Si](C)(OCC)CCCOC(=O)C(C)=C DOYKFSOCSXVQAN-UHFFFAOYSA-N 0.000 description 1
- KBQVDAIIQCXKPI-UHFFFAOYSA-N 3-trimethoxysilylpropyl prop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C=C KBQVDAIIQCXKPI-UHFFFAOYSA-N 0.000 description 1
- MAGFQRLKWCCTQJ-UHFFFAOYSA-N 4-ethenylbenzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=C(C=C)C=C1 MAGFQRLKWCCTQJ-UHFFFAOYSA-N 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 description 1
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 1
- 229920002732 Polyanhydride Polymers 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- ATMLPEJAVWINOF-UHFFFAOYSA-N acrylic acid acrylic acid Chemical class OC(=O)C=C.OC(=O)C=C ATMLPEJAVWINOF-UHFFFAOYSA-N 0.000 description 1
- 150000004703 alkoxides Chemical group 0.000 description 1
- 125000005907 alkyl ester group Chemical group 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- XDIJWRHVEDUFGP-UHFFFAOYSA-N azanium;2-phenylethenesulfonate Chemical compound [NH4+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 XDIJWRHVEDUFGP-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- INLLPKCGLOXCIV-UHFFFAOYSA-N bromoethene Chemical compound BrC=C INLLPKCGLOXCIV-UHFFFAOYSA-N 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013626 chemical specie Substances 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 229940117975 chromium trioxide Drugs 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N chromium trioxide Inorganic materials O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- GAMDZJFZMJECOS-UHFFFAOYSA-N chromium(6+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+6] GAMDZJFZMJECOS-UHFFFAOYSA-N 0.000 description 1
- WBYWAXJHAXSJNI-UHFFFAOYSA-N cinnamic acid Chemical compound OC(=O)C=CC1=CC=CC=C1 WBYWAXJHAXSJNI-UHFFFAOYSA-N 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000002109 crystal growth method Methods 0.000 description 1
- SPTHWAJJMLCAQF-UHFFFAOYSA-M ctk4f8481 Chemical compound [O-]O.CC(C)C1=CC=CC=C1C(C)C SPTHWAJJMLCAQF-UHFFFAOYSA-M 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- GAURFLBIDLSLQU-UHFFFAOYSA-N diethoxy(methyl)silicon Chemical compound CCO[Si](C)OCC GAURFLBIDLSLQU-UHFFFAOYSA-N 0.000 description 1
- OTARVPUIYXHRRB-UHFFFAOYSA-N diethoxy-methyl-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](C)(OCC)CCCOCC1CO1 OTARVPUIYXHRRB-UHFFFAOYSA-N 0.000 description 1
- WHGNXNCOTZPEEK-UHFFFAOYSA-N dimethoxy-methyl-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](C)(OC)CCCOCC1CO1 WHGNXNCOTZPEEK-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 1
- LEDCJBCTEYLBJO-UHFFFAOYSA-N ethyl 2-phenylethenesulfonate Chemical compound CCOS(=O)(=O)C=CC1=CC=CC=C1 LEDCJBCTEYLBJO-UHFFFAOYSA-N 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- ZKIAYSOOCAKOJR-UHFFFAOYSA-M lithium;2-phenylethenesulfonate Chemical compound [Li+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 ZKIAYSOOCAKOJR-UHFFFAOYSA-M 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 125000005395 methacrylic acid group Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 description 1
- DPLUMPJQXVYXBH-UHFFFAOYSA-N n,n-diethyl-2-phenylethenamine Chemical compound CCN(CC)C=CC1=CC=CC=C1 DPLUMPJQXVYXBH-UHFFFAOYSA-N 0.000 description 1
- DNTMQTKDNSEIFO-UHFFFAOYSA-N n-(hydroxymethyl)-2-methylprop-2-enamide Chemical compound CC(=C)C(=O)NCO DNTMQTKDNSEIFO-UHFFFAOYSA-N 0.000 description 1
- YRVUCYWJQFRCOB-UHFFFAOYSA-N n-butylprop-2-enamide Chemical compound CCCCNC(=O)C=C YRVUCYWJQFRCOB-UHFFFAOYSA-N 0.000 description 1
- YPHQUSNPXDGUHL-UHFFFAOYSA-N n-methylprop-2-enamide Chemical compound CNC(=O)C=C YPHQUSNPXDGUHL-UHFFFAOYSA-N 0.000 description 1
- QNILTEGFHQSKFF-UHFFFAOYSA-N n-propan-2-ylprop-2-enamide Chemical compound CC(C)NC(=O)C=C QNILTEGFHQSKFF-UHFFFAOYSA-N 0.000 description 1
- QQZXAODFGRZKJT-UHFFFAOYSA-N n-tert-butyl-2-methylprop-2-enamide Chemical compound CC(=C)C(=O)NC(C)(C)C QQZXAODFGRZKJT-UHFFFAOYSA-N 0.000 description 1
- XFHJDMUEHUHAJW-UHFFFAOYSA-N n-tert-butylprop-2-enamide Chemical compound CC(C)(C)NC(=O)C=C XFHJDMUEHUHAJW-UHFFFAOYSA-N 0.000 description 1
- KKFHAJHLJHVUDM-UHFFFAOYSA-N n-vinylcarbazole Chemical compound C1=CC=C2N(C=C)C3=CC=CC=C3C2=C1 KKFHAJHLJHVUDM-UHFFFAOYSA-N 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000141 poly(maleic anhydride) Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920001281 polyalkylene Polymers 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 239000011736 potassium bicarbonate Substances 0.000 description 1
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 1
- 235000015497 potassium bicarbonate Nutrition 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 235000011181 potassium carbonates Nutrition 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- 229940086066 potassium hydrogencarbonate Drugs 0.000 description 1
- 235000011118 potassium hydroxide Nutrition 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- YPVDWEHVCUBACK-UHFFFAOYSA-N propoxycarbonyloxy propyl carbonate Chemical compound CCCOC(=O)OOC(=O)OCCC YPVDWEHVCUBACK-UHFFFAOYSA-N 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- MNCGMVDMOKPCSQ-UHFFFAOYSA-M sodium;2-phenylethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 MNCGMVDMOKPCSQ-UHFFFAOYSA-M 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 125000005504 styryl group Chemical group 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- UIERETOOQGIECD-ONEGZZNKSA-N tiglic acid Chemical class C\C=C(/C)C(O)=O UIERETOOQGIECD-ONEGZZNKSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- NBXZNTLFQLUFES-UHFFFAOYSA-N triethoxy(propyl)silane Chemical compound CCC[Si](OCC)(OCC)OCC NBXZNTLFQLUFES-UHFFFAOYSA-N 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- KOZCZZVUFDCZGG-UHFFFAOYSA-N vinyl benzoate Chemical compound C=COC(=O)C1=CC=CC=C1 KOZCZZVUFDCZGG-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Description
本発明は、電子材料、電池等に用いられるポリマー被覆シリコンに関する。 The present invention relates to polymer-coated silicon used in electronic materials, batteries, etc.
粒径がナノメートルオーダーまで微細化されたシリコンナノ粒子は、高効率ＬＥＤや太陽電池、リチウムイオン二次電池等に用いられている。例えば太陽電池にシリコンナノ粒子を塗布することにより、シリコンナノ粒子から太陽電池材料へのエネルギー移動を可能として変換効率が向上する（例えば特許文献１、非特許文献１参照）。また、シリコンはリチウムイオン二次電池の負極材として黒鉛の１０倍以上の理論容量を持つため、次世代の負極材料として期待されている。シリコンは充放電の際に大きく体積変化するため、粒子の崩壊を防いで電池寿命を向上させるためにシリコンナノ粒子が有用である（例えば非特許文献２参照）。 Silicon nanoparticles whose particle size has been reduced to nanometer order are used in high-efficiency LEDs, solar cells, lithium ion secondary batteries, and the like. For example, by coating a solar cell with silicon nanoparticles, energy can be transferred from the silicon nanoparticles to the solar cell material, thereby improving conversion efficiency (see, for example, Patent Document 1 and Non-Patent Document 1). In addition, silicon has a theoretical capacity more than 10 times that of graphite as a negative electrode material for lithium ion secondary batteries, and is therefore expected to be a next-generation negative electrode material. Since silicon undergoes a large volume change during charging and discharging, silicon nanoparticles are useful for preventing particle collapse and improving battery life (see, for example, Non-Patent Document 2).
様々な用途で用いられるシリコンナノ粒子であるが、活性な粒子表面の保護が大きな課題である。ナノサイズ化により表面原子数の割合が増し、バルクシリコンに比して表面活性が非常に大きく容易に酸化される。解決策の一つとして、シリコンナノ粒子の表面修飾が挙げられる。ナノ粒子表面をフッ酸等の強力な酸でエッチングし、アルキル基で置換して被覆層を形成することでシリコンナノ粒子の安定性が向上することが知られている（例えば特許文献２参照）。アルキル基による置換は表面保護として有効であるが、フッ酸等の強力な酸を必要とし実際の使用の際に大きな問題がある。また、置換基による被覆層の膜厚はせいぜい１０ｎｍ程度であり非常に薄い。 Silicon nanoparticles are used in a variety of applications, but protecting the active particle surface is a major issue. Due to nano-sizing, the proportion of surface atoms increases, and the surface activity is much higher than that of bulk silicon, and it is easily oxidized. One solution is to modify the surface of silicon nanoparticles. It is known that the stability of silicon nanoparticles can be improved by etching the nanoparticle surface with a strong acid such as hydrofluoric acid and replacing it with an alkyl group to form a coating layer (see, for example, Patent Document 2). . Although substitution with an alkyl group is effective as surface protection, it requires a strong acid such as hydrofluoric acid, which poses a major problem in actual use. Further, the thickness of the coating layer formed by the substituent group is approximately 10 nm at most, which is very thin.
このような背景のもと、フッ酸等の強力な酸を用いることなく、シリコンナノ粒子の周囲を１０ｎｍ以上の厚みで均一に被覆する方法が求められている。球状のシリコンナノ粒子にポリスチレンを被覆する方法が最近報告されているが、適用できるシリコンナノ粒子形状が球状に限られ、かつ、シリコン粒子の平均粒径が１００ｎｍ以下と小さく、シリコン同士の分散性が非常に悪く凝集している（例えば非特許文献３参照）。異方性を持ったシリコンナノ粒子の周囲を均一かつ分散性良く化学種で被覆する方法は知られていない。 Against this background, there is a need for a method for uniformly coating silicon nanoparticles with a thickness of 10 nm or more without using strong acids such as hydrofluoric acid. A method of coating polystyrene on spherical silicon nanoparticles has recently been reported, but the applicable silicon nanoparticle shape is limited to spherical, the average particle size of the silicon particles is small at 100 nm or less, and the dispersibility of silicon particles is low. is extremely poorly aggregated (see, for example, Non-Patent Document 3). There is no known method for coating anisotropic silicon nanoparticles with chemical species uniformly and with good dispersion.
従って、本発明が解決しようとする課題は、電子材料や電池等に用いることができる、シリコンナノ粒子の周囲がポリマーで被覆されたポリマー被覆シリコンナノ粒子を提供することにある。 Therefore, the problem to be solved by the present invention is to provide polymer-coated silicon nanoparticles in which the periphery of silicon nanoparticles is coated with a polymer, which can be used for electronic materials, batteries, and the like.
本発明者らは、種々検討の結果、以下の構成によって上記課題を解決できることを見出した。
（１）
シリコン粒子のメディアン径（Ｄ５０）が１００～１０００ｎｍであるポリマー被覆シリコン粒子。
（２）
シリコン粒子の表面が改質されている（１）に記載のポリマー被覆シリコン粒子。
（３）
シリコン粒子がＳｉＯ２、Ｓｉ（Ｉ）Ｏ、Ｓｉ（ＩＩ）Ｏ、Ｓｉ（ＩＩＩ）Ｏ、またはＳｉＯＨを介してポリマーと結合している（１）又は（２）に記載のポリマー被覆シリコン粒子。
（４）
シリコン粒子の平均長径度が４以下である（１）～（３）のいずれかに記載のポリマー被覆シリコン粒子。
（５）
シリコン粒子に対する被覆ポリマーの体積比が１以上である（１）～（４）のいずれかに記載のポリマー被覆シリコン粒子。
（６）
１つのポリマー内に含まれる平均シリコン粒子数が４以下である（１）～（５）のいずれかに記載のポリマー被覆シリコン粒子。
（７）
Ｄ５０が２００～１２００ｎｍである（１）～（６）のいずれかに記載のポリマー被覆シリコン粒子。
（８）
被覆ポリマーが、ポリスチレン、ポリメタクリル酸、ポリメタクリル酸メチル、ポリメタクリル酸エチル、ポリメタクリル酸ｎ－プロピル、ポリメタクリル酸イソプロピル、ポリメタクリル酸ｎ－ブチル、ポリメタクリル酸ｓｅｃ－ブチル、ポリメタクリル酸イソブチル、ポリメタクリル酸ｔｅｒｔ－ブチル、ポリメタクリル酸２－エチルへキシル、ポリメタクリル酸イソボニル、ポリメタクリル酸ベンジル、ポリメタクリル酸２－ヒドロキシエチル、ポリメタクリル酸ヒドロキシプロピル、ポリメタクリル酸ヒドロキシブチル、ポリメタクリル酸トリエチレングリコ－ルなどのポリメタクリル酸系、ポリイタコン酸無水物、ポリイタコン酸、ポリアクリル酸、ポリアクリル酸メチル、ポリアクリル酸エチル、ポリアクリル酸ｎ－プロピル、ポリアクリル酸イソプロピル、ポリアクリル酸ｎ－ブチル、ポリアクリル酸ｓｅｃ－ブチル、ポリアクリル酸イソブチル、ポリアクリル酸ｔｅｒｔ－ブチル、ポリアクリル酸２－エチルへキシル、ポリアクリル酸イソボルニル、ポリアクリル酸ベンジル、ポリアクリル酸フェニル、ポリアクリル酸グリシジル、ポリアクリル酸２－ヒドロキシエチル、ポリアクリル酸ヒドロキシプロピル、ポリアクリル酸ヒドロキシブチルなどのポリアクリル酸系、ポリメタクリルアミド、ポリ（Ｎ－メチルアクリルアミド）、ポリ（Ｎ、Ｎ’－ジメチルアクリルアミド）、ポリ（Ｎ－ｔｅｒｔ－ブチルメタクリルアミド）、ポリ（Ｎ－ｎ－ブチルメタクリルアミド）、ポリ（Ｎ－メチロ－ルメタクリルアミド）、ポリ（Ｎ－エチロ－ルメタクリルアミド）などのポリメタクリルアミド系、ポリ（Ｎ，Ｎ’－メチレンビスアクリルアミド）、ポリＮ－イソプロピルアクリルアミド）、ポリ（Ｎ－ｔｅｒｔ－ブチルアクリルアミド）、ポリ（Ｎ－ｎ－ブチルアクリルアミド）、ポリ（Ｎ－メチロ－ルアクリルアミド）、ポリ（Ｎ－エチロ－ルアクリルアミド）などのポリアクリルアミド系、ポリ安息香酸ビニル、ポリジエチルアミノスチレン、ポリジエチルアミノアルファ－メチルスチレン、ポリ（ｐ－ビニルベンゼンスルホン酸）、ポリ（ｐ－ビニルベンゼンスルホン酸ナトリウム塩）、ポリ（ｐ－ビニルベンゼンスルホン酸リチウム塩）、ポリジビニルベンゼン、ポリ酢酸ビニル、ポリ酢酸ブチル、ポリ塩化ビニル、ポリフッ化ビニル、ポリ臭化ビニル、ポリ無水マレイン酸、ポリ（Ｎ－フェニルマレイミド）、ポリ（Ｎ－ブチルマレイミド）、ポリ（Ｎ－ビニルピロリドン）、ポリ（Ｎ－ビニルカルバゾ－ル）、ポリアクリロニトリル、ポリアニリン、ポリピロ－ル、ウレタン重合に用いられるポリオ－ル系又はイソシアネ－ト系からなる群から選ばれる１種以上のモノマーの単独重合体又は共重合体である（１）～（７）のいずれかに記載のポリマー被覆シリコン粒子。
As a result of various studies, the present inventors have found that the above problem can be solved by the following configuration.
(1)
Polymer-coated silicon particles having a median diameter (D50) of 100 to 1000 nm.
(2)
The polymer-coated silicon particles according to (1), wherein the surface of the silicon particles is modified.
(3)
The polymer-coated silicon particles according to (1) or (2), wherein the silicon particles are bonded to the polymer via SiO 2 , Si(I)O, Si(II)O, Si(III)O, or SiOH.
(4)
Polymer-coated silicon particles according to any one of (1) to (3), wherein the average major diameter of the silicon particles is 4 or less.
(5)
Polymer-coated silicon particles according to any one of (1) to (4), wherein the volume ratio of the coating polymer to the silicon particles is 1 or more.
(6)
Polymer-coated silicon particles according to any one of (1) to (5), wherein the average number of silicon particles contained in one polymer is 4 or less.
(7)
Polymer-coated silicon particles according to any one of (1) to (6), which have a D50 of 200 to 1200 nm.
(8)
The coating polymer is polystyrene, polymethacrylic acid, polymethyl methacrylate, polyethyl methacrylate, polyn-propyl methacrylate, polyisopropyl methacrylate, polyn-butyl methacrylate, polysec-butyl methacrylate, polyisobutyl methacrylate. , poly tert-butyl methacrylate, poly 2-ethylhexyl methacrylate, poly isobornyl methacrylate, poly benzyl methacrylate, poly 2-hydroxyethyl methacrylate, poly hydroxypropyl methacrylate, poly hydroxybutyl methacrylate, poly methacrylic acid Polymethacrylic acid series such as triethylene glycol, polyitaconic anhydride, polyitaconic acid, polyacrylic acid, polymethyl acrylate, polyethyl acrylate, n-propyl polyacrylate, isopropyl polyacrylate, polyacrylic acid n -Butyl, sec-butyl polyacrylate, isobutyl polyacrylate, tert-butyl polyacrylate, 2-ethylhexyl polyacrylate, isobornyl polyacrylate, benzyl polyacrylate, phenyl polyacrylate, glycidyl polyacrylate , polyacrylic acids such as 2-hydroxyethyl polyacrylate, hydroxypropyl polyacrylate, and hydroxybutyl polyacrylate, polymethacrylamide, poly(N-methylacrylamide), poly(N,N'-dimethylacrylamide), Polymethacrylamide systems such as poly(N-tert-butylmethacrylamide), poly(Nn-butylmethacrylamide), poly(N-methylolmethacrylamide), poly(N-ethylolmethacrylamide), Poly(N,N'-methylenebisacrylamide), poly(N-isopropylacrylamide), poly(N-tert-butylacrylamide), poly(Nn-butylacrylamide), poly(N-methylol-ylacrylamide), poly (N-ethylol acrylamide), polyvinyl benzoate, polydiethylaminostyrene, polydiethylamino alpha-methylstyrene, poly(p-vinylbenzenesulfonic acid), poly(p-vinylbenzenesulfonic acid sodium salt) ), poly(p-vinylbenzenesulfonic acid lithium salt), polydivinylbenzene, polyvinyl acetate, polybutyl acetate, polyvinyl chloride, polyvinyl fluoride, polyvinyl bromide, polymaleic anhydride, poly(N-phenylmaleimide) ), poly(N-butylmaleimide), poly(N-vinylpyrrolidone), poly(N-vinylcarbazole), polyacrylonitrile, polyaniline, polypyrrole, polyol type or isocyanate type used in urethane polymerization The polymer-coated silicon particles according to any one of (1) to (7), which are a homopolymer or copolymer of one or more monomers selected from the group consisting of.
本発明によれば、シリコンの酸化が抑制されたＤ５０が１００～１０００ｎｍであるシリコン粒子の周囲がポリマーで被覆された、ポリマー被覆シリコン粒子を提供することができる。 According to the present invention, it is possible to provide polymer-coated silicon particles in which silicon particles whose oxidation of silicon is suppressed and whose D50 is 100 to 1000 nm are coated with a polymer.
以下に、本発明のポリマー被覆シリコン粒子について、本発明の一例を示しながら詳述する。ただし、本発明の範囲はこれらの説明に拘束されることはなく、以下の例示以外についても、本発明の趣旨を損なわない範囲で適宜変更して実施することができる。 Below, the polymer-coated silicon particles of the present invention will be explained in detail while showing an example of the present invention. However, the scope of the present invention is not limited to these descriptions, and other than the examples below can be implemented with appropriate modifications within the scope of not impairing the spirit of the present invention.
本発明のポリマー被覆シリコン粒子は、少なくともシリコンとポリマーとを含み、シリコン粒子がポリマーに被覆されているものである。ここでいう被覆されている状態とは、図１で示すようにシリコン粒子の表面被覆率が８０％以上である状態を言う。表面被覆率は、例えば、透過型電子顕微鏡（Ｔｒａｎｓｍｉｓｓｉｏｎ Ｅｌｅｃｔｒｏｎ Ｍｉｃｒｏｓｃｏｐｅ；以下、ＴＥＭと称する。）写真を視覚的に検査することにより評価することができる。 The polymer-coated silicon particles of the present invention contain at least silicon and a polymer, and the silicon particles are coated with the polymer. The coated state here refers to a state where the surface coverage of silicon particles is 80% or more, as shown in FIG. The surface coverage can be evaluated, for example, by visually inspecting a transmission electron microscope (hereinafter referred to as TEM) photograph.
本発明のポリマー被覆シリコン粒子におけるシリコンは、純度が９８重量％程度の汎用グレ－ドの金属シリコン、純度が２～４Ｎのケミカルグレ－ドの金属シリコン、塩素化して蒸留精製した４Ｎより高純度のポリシリコン、単結晶成長法による析出工程を経た超高純度の単結晶シリコン、もしくはそれらに周期表１３族もしくは１５族元素をド－ピングして、ｐ型又はｎ型としたもの、半導体製造プロセスで発生したウエハの研磨や切断の屑、プロセスで不良となった廃棄ウエハなど、汎用グレ－ドの金属シリコン以上の純度のものであれば特に限定されない。シリコンは、純度２～４Ｎの金属シリコンであることが好ましい。 The silicon in the polymer-coated silicon particles of the present invention is general-purpose grade metal silicon with a purity of about 98% by weight, chemical grade metal silicon with a purity of 2 to 4N, or 4N purified by chlorination and distillation. Polysilicon, ultra-high purity single crystal silicon that has gone through a precipitation process using the single crystal growth method, or doped with elements from Group 13 or Group 15 of the periodic table to make it p-type or n-type, semiconductor manufacturing There are no particular limitations on the material, as long as it is of a purity higher than that of general-purpose metal silicon, such as scraps from polishing or cutting wafers generated during the process, or waste wafers that are defective during the process. The silicon is preferably metallic silicon with a purity of 2 to 4N.
本発明のポリマー被覆シリコン粒子におけるシリコン粒子の粒径（Ｄ５０：５０％体積粒径）は、１００～１０００ｎｍであり、好ましくは１２０ｎｍ～８００ｎｍであり、特に好ましくは１２０～６００ｎｍであり、より好ましくは１５０～４００ｎｍである。 The particle size (D50: 50% volume particle size) of the silicon particles in the polymer-coated silicon particles of the present invention is 100 to 1000 nm, preferably 120 nm to 800 nm, particularly preferably 120 to 600 nm, and more preferably It is 150 to 400 nm.
Ｄ５０は、レ－ザ－回折散乱法により測定した累積粒度分布において微粒側から累積５０％の粒径に該当する。粒径の測定に際しては、シリコン粒子やポリマー被覆シリコン粒子を液体に加えて超音波等を利用しながら激しく混合することで分散液を作製し、作製した分散液を装置に測定サンプルとして導入し、粒径の測定を行えばよい。 D50 corresponds to the cumulative particle size of 50% from the fine particle side in the cumulative particle size distribution measured by laser diffraction scattering method. When measuring the particle size, a dispersion liquid is created by adding silicon particles or polymer-coated silicon particles to a liquid and vigorously mixing them using ultrasonic waves, etc., and introducing the created dispersion liquid into the device as a measurement sample. What is necessary is to measure the particle size.
本発明のポリマー被覆シリコン粒子では、シリコンとポリマーの密着性を向上できることから、シリコン粒子の表面が改質されていることが好ましく、具体的には、シリコン粒子がＳｉＯ２、Ｓｉ（Ｉ）Ｏ、Ｓｉ（ＩＩ）Ｏ、Ｓｉ（ＩＩＩ）Ｏ、またはＳｉＯＨを介してポリマーと結合していることが好ましい。ＳｉＯ２、Ｓｉ（Ｉ）Ｏ、Ｓｉ（ＩＩ）Ｏ、Ｓｉ（ＩＩＩ）Ｏ、またはＳｉＯＨの存在および組成は、例えばＸ線光電分光法などの分析手法により測定できる。 In the polymer-coated silicon particles of the present invention, it is preferable that the surface of the silicon particles is modified because the adhesion between silicon and the polymer can be improved. Specifically, the silicon particles are made of SiO 2 , Si(I)O , Si(II)O, Si(III)O, or SiOH. The presence and composition of SiO 2 , Si(I)O, Si(II)O, Si(III)O, or SiOH can be determined by analytical techniques such as, for example, X-ray photoelectric spectroscopy.
本発明のポリマー被覆シリコン粒子におけるシリコン粒子の平均長径度は４以下であることが好ましく、特に好ましくは３以下である。長径度がこの範囲にあることで、シリコン粒子の端部までポリマーで被覆しやすくなる。 The average major diameter of the silicon particles in the polymer-coated silicon particles of the present invention is preferably 4 or less, particularly preferably 3 or less. When the major axis is within this range, it becomes easier to coat the ends of the silicon particles with the polymer.
長径度は、一つの粒子について（長径度）＝（長径）／（短径）で定義される。シリコン粒子の長径度を測定する方法として、例えば、図１に示すようなＴＥＭ画像において、各粒子内のシリコン粒子の長径と短径を画像処理で計測する方法が挙げられる。シリコン平均長径度は、例えば、ＴＥＭ画像内の２０個以上の粒子について求めた長径度の平均を算出することで求められる。 The major axis is defined for one particle as (major axis)=(major axis)/(minor axis). As a method for measuring the major diameter of silicon particles, for example, in a TEM image as shown in FIG. 1, there is a method of measuring the major axis and minor diameter of silicon particles in each particle by image processing. The silicon average major axis degree can be obtained, for example, by calculating the average of the major axis degrees obtained for 20 or more particles in a TEM image.
本発明のポリマー被覆シリコン粒子ではシリコン粒子に対する被覆ポリマーの体積比が１以上であることが好ましく、特に好ましくは３以上である。 In the polymer-coated silicon particles of the present invention, the volume ratio of the coating polymer to the silicon particles is preferably 1 or more, particularly preferably 3 or more.
シリコン粒子に対する被覆ポリマーの体積比の算出方法として、以下の方法が挙げられる。 As a method for calculating the volume ratio of the coating polymer to the silicon particles, the following method can be mentioned.
まず、得られたポリマー被覆シリコン粒子のＴＥＭ画像の上に透明シートを２枚重ね、１枚のシートにはシリコンに相当する部分をペンで模写し、もう１枚のシートにはポリマーに相当する部分をペンで模写する。透明シートとしては作業性が良いことから、ＯＨＰシート（オーバーヘッドプロジェクター用シート）を用いる。計測する粒子数としては多いほど良いが、作業性の観点から１０粒子以上、好ましくは２０粒子以上計測する。次に、それぞれの画像をＪＰＥＧやＴＩＦＦデータに変換し、Ｎａｎｏ Ｈｕｎｔｅｒ ＮＳ２Ｋ－Ｐｒｏ（ナノシステム株式会社）を用いて２値化し、シリコン部分とポリマー部分それぞれの総面積を算出する。次に、シリコン粒子の総面積を計測個数で割ることで、シリコン粒子１個の平均面積（ＳＳｉ、ｎｍ２）を算出し、シリコン粒子１個の平均体積（ＶＳｉ、ｎｍ３）＝（４／３）×ＳＳｉ×√（ＳＳｉ／π）の式からシリコン粒子１個の平均体積を算出する。さらに、ポリマーの総面積を計測個数で割ることで、１つの複合粒子に含まれるポリマー部分の面積（ＳＰＳ、ｎｍ２）を求め、ＳＳｉとＳｐｓを加算することで複合粒子１個の面積（Ｓ）を算出する。その後、複合粒子１個の平均体積（Ｖ、ｎｍ３）＝（４／３）×Ｓ×√（Ｓ／π）の式から複合粒子１個の平均体積を算出する。複合粒子１個に含まれるポリマー部分の体積（Ｖｐｓ、ｎｍ３）はＶｐｓ＝Ｖ－ＶＳｉから算出できる。最後にＶｐｓをＶＳｉで割ることで、シリコン粒子に対する被覆ポリマーの体積比を算出することができる。 First, two transparent sheets were placed on top of the TEM image of the obtained polymer-coated silicon particles, and on one sheet, the part corresponding to the silicone was copied with a pen, and on the other sheet, the part corresponding to the polymer was copied. Copy the part with a pen. As the transparent sheet, an OHP sheet (sheet for overhead projector) is used because it has good workability. The larger the number of particles to be measured, the better, but from the viewpoint of workability, 10 particles or more, preferably 20 particles or more are measured. Next, each image is converted into JPEG or TIFF data, binarized using Nano Hunter NS2K-Pro (Nano System Co., Ltd.), and the total area of each of the silicon portion and polymer portion is calculated. Next, the average area of one silicon particle (S Si , nm 2 ) is calculated by dividing the total area of silicon particles by the measured number, and the average volume of one silicon particle (V Si , nm 3 )=( The average volume of one silicon particle is calculated from the formula: 4/3)×S Si ×√(S Si /π). Furthermore, by dividing the total area of the polymer by the measured number, the area (S PS , nm 2 ) of the polymer part included in one composite particle is calculated, and by adding S Si and S ps , the area of the polymer part included in one composite particle is calculated. Calculate the area (S). Thereafter, the average volume of one composite particle is calculated from the formula: average volume of one composite particle (V, nm 3 )=(4/3)×S×√(S/π). The volume (V ps , nm 3 ) of the polymer portion contained in one composite particle can be calculated from V ps =V−V Si . Finally, by dividing V ps by V Si , the volume ratio of coating polymer to silicon particles can be calculated.
本発明のポリマー被覆シリコン粒子では、シリコン同士の凝集を防止できることから、１つのポリマー内に含まれる平均シリコン粒子数は４以下であることが好ましく、特に好ましくは２以下である。 In the polymer-coated silicon particles of the present invention, the average number of silicon particles contained in one polymer is preferably 4 or less, particularly preferably 2 or less, since aggregation of silicon particles can be prevented.
１つのポリマー内に含まれる平均シリコン粒子数を測定する手法として、例えばポリマー被覆シリコン粒子のＴＥＭ画像を視覚的に検査する方法が挙げられる。図２に示すようにポリマー被覆シリコン粒子が２０個以上映ったＴＥＭ画像を用意し、各ポリマー内に含まれるシリコン粒子の個数を計上し、その平均を計算することで１つのポリマー内に含まれる平均シリコン粒子数を求めることができる。測定のばらつきを小さくするために、２０個以上のポリマーについて調べることが好ましい。 A method for measuring the average number of silicon particles contained within one polymer includes, for example, visually inspecting a TEM image of polymer-coated silicon particles. As shown in Figure 2, prepare a TEM image showing 20 or more polymer-coated silicon particles, count the number of silicon particles contained in each polymer, and calculate the average of the number of silicon particles contained in one polymer. The average number of silicon particles can be determined. In order to reduce measurement variations, it is preferable to investigate 20 or more polymers.
本発明のポリマー被覆シリコン粒子のＤ５０は２００～１２００ｎｍであることが好ましく、特に好ましくは２６０～１０００ｎｍである。ポリマー被覆シリコンの粒径がこの範囲にあることで粒子同士が凝集しにくくなる。 The D50 of the polymer-coated silicon particles of the present invention is preferably 200 to 1200 nm, particularly preferably 260 to 1000 nm. When the particle size of the polymer-coated silicone is within this range, particles are less likely to aggregate with each other.
本発明のポリマー被覆シリコン粒子における被覆ポリマーとしては、ポリスチレン、ポリメタクリル酸、ポリメタクリル酸メチル、ポリメタクリル酸エチル、ポリメタクリル酸ｎ－プロピル、ポリメタクリル酸イソプロピル、ポリメタクリル酸ｎ－ブチル、ポリメタクリル酸ｓｅｃ－ブチル、ポリメタクリル酸イソブチル、ポリメタクリル酸ｔｅｒｔ－ブチル、ポリメタクリル酸２－エチルへキシル、ポリメタクリル酸イソボニル、ポリメタクリル酸ベンジル、ポリメタクリル酸２－ヒドロキシエチル、ポリメタクリル酸ヒドロキシプロピル、ポリメタクリル酸ヒドロキシブチル、ポリメタクリル酸トリエチレングリコ－ルなどのポリメタクリル酸系、ポリイタコン酸無水物、ポリイタコン酸、ポリアクリル酸、ポリアクリル酸メチル、ポリアクリル酸エチル、ポリアクリル酸ｎ－プロピル、ポリアクリル酸イソプロピル、ポリアクリル酸ｎ－ブチル、ポリアクリル酸ｓｅｃ－ブチル、ポリアクリル酸イソブチル、ポリアクリル酸ｔｅｒｔ－ブチル、ポリアクリル酸２－エチルへキシル、ポリアクリル酸イソボルニル、ポリアクリル酸ベンジル、ポリアクリル酸フェニル、ポリアクリル酸グリシジル、ポリアクリル酸２－ヒドロキシエチル、ポリアクリル酸ヒドロキシプロピル、ポリアクリル酸ヒドロキシブチルなどのポリアクリル酸系、ポリメタクリルアミド、ポリ（Ｎ－メチルアクリルアミド）、ポリ（Ｎ、Ｎ’－ジメチルアクリルアミド）、ポリ（Ｎ－ｔｅｒｔ－ブチルメタクリルアミド）、ポリ（Ｎ－ｎ－ブチルメタクリルアミド）、ポリ（Ｎ－メチロ－ルメタクリルアミド）、ポリ（Ｎ－エチロ－ルメタクリルアミド）などのポリメタクリルアミド系、ポリ（Ｎ，Ｎ’－メチレンビスアクリルアミド）、ポリＮ－イソプロピルアクリルアミド）、ポリ（Ｎ－ｔｅｒｔ－ブチルアクリルアミド）、ポリ（Ｎ－ｎ－ブチルアクリルアミド）、ポリ（Ｎ－メチロ－ルアクリルアミド）、ポリ（Ｎ－エチロ－ルアクリルアミド）などのポリアクリルアミド系、ポリ安息香酸ビニル、ポリジエチルアミノスチレン、ポリジエチルアミノアルファ－メチルスチレン、ポリ（ｐ－ビニルベンゼンスルホン酸）、ポリ（ｐ－ビニルベンゼンスルホン酸ナトリウム塩）、ポリ（ｐ－ビニルベンゼンスルホン酸リチウム塩）、ポリジビニルベンゼン、ポリ酢酸ビニル、ポリ酢酸ブチル、ポリ塩化ビニル、ポリフッ化ビニル、ポリ臭化ビニル、ポリ無水マレイン酸、ポリ（Ｎ－フェニルマレイミド）、ポリ（Ｎ－ブチルマレイミド）、ポリ（Ｎ－ビニルピロリドン）、ポリ（Ｎ－ビニルカルバゾ－ル）、ポリアクリロニトリル、ポリアニリン、ポリピロ－ル、ウレタン重合に用いられるポリオ－ル系又はイソシアネ－ト系からなる群から選ばれる１種以上のモノマーの単独重合体又は共重合体等が挙げられ、好ましくはポリスチレン、ポリメタクリル酸、ポリメタクリル酸メチル、ポリメタクリル酸エチル、ポリメタクリル酸ｎ－プロピル、ポリメタクリル酸イソプロピル、ポリメタクリル酸ｎ－ブチル、ポリメタクリル酸ｓｅｃ－ブチル、ポリメタクリル酸イソブチル、ポリメタクリル酸ｔｅｒｔ－ブチル、ポリメタクリル酸２－エチルへキシル、ポリメタクリル酸イソボニル、ポリメタクリル酸ベンジル、ポリメタクリル酸２－ヒドロキシエチル、ポリメタクリル酸ヒドロキシプロピル、ポリメタクリル酸ヒドロキシブチル、ポリメタクリル酸トリエチレングリコ－ルなどのメチルメタクリル酸系、ポリイタコン酸無水物、ポリイタコン酸、ポリアクリル酸、ポリアクリル酸メチル、ポリアクリル酸エチル、ポリアクリル酸ｎ－プロピル、ポリアクリル酸イソプロピル、ポリアクリル酸ｎ－ブチル、ポリアクリル酸ｓｅｃ－ブチル、ポリアクリル酸イソブチル、ポリアクリル酸ｔｅｒｔ－ブチル、ポリアクリル酸２－エチルへキシル、ポリアクリル酸イソボルニル、ポリアクリル酸ベンジル、ポリアクリル酸フェニル、ポリアクリル酸グリシジル、ポリアクリル酸２－ヒドロキシエチル、ポリアクリル酸ヒドロキシプロピル、ポリアクリル酸ヒドロキシブチルなどのポリアクリル酸系、ポリアクリロニトリルからなる群から選ばれる１種以上のモノマーの単独重合体又は共重合体等であり、さらに好ましくは、ポリスチレン、ポリメタクリル酸メチル、ポリメタクリル酸エチル、ポリメタクリル酸ｎ－プロピル、ポリメタクリル酸ｎ－ブチル、ポリアクリル酸メチル、ポリアクリル酸エチル、ポリアクリル酸ｎ－プロピル、ポリアクリル酸ｎ－ブチル、ポリアクリロニトリルからなる群から選ばれる１種以上のモノマーの単独重合体又は共重合体等であり、特に好ましくはポリスチレン、ポリメタクリル酸メチル又はポリアクリル酸メチルからなる群から選ばれる１種以上のモノマーの単独重合体又は共重合体等である。 Examples of the coating polymer in the polymer-coated silicone particles of the present invention include polystyrene, polymethacrylic acid, polymethyl methacrylate, polyethyl methacrylate, polyn-propyl methacrylate, polyisopropyl methacrylate, polyn-butyl methacrylate, and polymethacrylate. sec-butyl acid, polyisobutyl methacrylate, poly tert-butyl methacrylate, poly 2-ethylhexyl methacrylate, polyisobonyl methacrylate, polybenzyl methacrylate, poly 2-hydroxyethyl methacrylate, polyhydroxypropyl methacrylate, Polymethacrylic acid series such as polyhydroxybutyl methacrylate and polytriethylene glycol methacrylate, polyitaconic anhydride, polyitaconic acid, polyacrylic acid, polymethyl acrylate, polyethyl acrylate, polyacrylic n-propyl, Isopropyl polyacrylate, n-butyl polyacrylate, sec-butyl polyacrylate, isobutyl polyacrylate, tert-butyl polyacrylate, 2-ethylhexyl polyacrylate, isobornyl polyacrylate, benzyl polyacrylate, Polyacrylic acids such as phenyl polyacrylate, glycidyl polyacrylate, 2-hydroxyethyl polyacrylate, hydroxypropyl polyacrylate, hydroxybutyl polyacrylate, polymethacrylamide, poly(N-methylacrylamide), poly( N,N'-dimethylacrylamide), poly(N-tert-butylmethacrylamide), poly(Nn-butylmethacrylamide), poly(N-methylolmethacrylamide), poly(N-ethylolmethacrylamide) poly(N,N'-methylenebisacrylamide), poly(N-isopropylacrylamide), poly(N-tert-butylacrylamide), poly(N-n-butylacrylamide), poly( Polyacrylamide systems such as N-methylol acrylamide), poly(N-ethyl acrylamide), polyvinyl benzoate, polydiethylaminostyrene, polydiethylamino alpha-methylstyrene, poly(p-vinylbenzenesulfonic acid), poly (p-vinylbenzenesulfonic acid sodium salt), poly(p-vinylbenzenesulfonic acid lithium salt), polydivinylbenzene, polyvinyl acetate, polybutyl acetate, polyvinyl chloride, polyvinyl fluoride, polyvinyl bromide, polyanhydride Maleic acid, poly(N-phenylmaleimide), poly(N-butylmaleimide), poly(N-vinylpyrrolidone), poly(N-vinylcarbazole), polyacrylonitrile, polyaniline, polypyrrole, used in urethane polymerization Examples include homopolymers or copolymers of one or more monomers selected from the group consisting of polyols or isocyanates, and preferred are polystyrene, polymethacrylic acid, polymethyl methacrylate, and polyethyl methacrylate. , poly n-propyl methacrylate, poly isopropyl methacrylate, poly n-butyl methacrylate, poly sec-butyl methacrylate, poly isobutyl methacrylate, poly tert-butyl methacrylate, poly 2-ethylhexyl methacrylate, polymethacrylate Methyl methacrylic acid series such as isobonyl acid, polybenzyl methacrylate, poly 2-hydroxyethyl methacrylate, polyhydroxypropyl methacrylate, polyhydroxybutyl methacrylate, polytriethylene glycol methacrylate, polyitaconic anhydride, polyitaconic acid , polyacrylic acid, methyl polyacrylate, ethyl polyacrylate, n-propyl polyacrylate, isopropyl polyacrylate, n-butyl polyacrylate, sec-butyl polyacrylate, isobutyl polyacrylate, tert polyacrylate -Butyl, 2-ethylhexyl polyacrylate, isobornyl polyacrylate, benzyl polyacrylate, phenyl polyacrylate, glycidyl polyacrylate, 2-hydroxyethyl polyacrylate, hydroxypropyl polyacrylate, hydroxy polyacrylate It is a homopolymer or copolymer of one or more monomers selected from the group consisting of polyacrylic acids such as butyl, polyacrylonitrile, and more preferably polystyrene, polymethyl methacrylate, polyethyl methacrylate, and polyethyl methacrylate. One or more monomers selected from the group consisting of n-propyl methacrylate, n-butyl polymethacrylate, methyl polyacrylate, ethyl polyacrylate, n-propyl polyacrylate, n-butyl polyacrylate, and polyacrylonitrile. Especially preferred are homopolymers or copolymers of one or more monomers selected from the group consisting of polystyrene, polymethyl methacrylate, and polymethyl acrylate.
本発明のポリマー被覆シリコン粒子の製造方法としては、シリコン粒子をポリマーとなる高分子モノマーとを反応させ、そこに開始剤を加えることで得られる高分子モノマーのスラリーを重合することにより、ポリマー被覆シリコン粒子を得る方法が挙げられる。 The method for producing polymer-coated silicon particles of the present invention involves reacting silicon particles with a polymer monomer that becomes a polymer, and adding an initiator thereto to polymerize a slurry of the polymer monomer obtained. Examples include methods for obtaining silicon particles.
本発明のポリマー被覆シリコン粒子の製造方法では、シリコン粒子と高分子モノマーを反応させる際には、反応を促進させるために、シリコン粒子の表面を改質することが好ましい。ここでいう改質とは、表面改質剤を用いる化学反応によってシリコン粒子の表面状態を変化させ、ポリマーの被覆を容易にする工程である。表面改質剤としては、分子内にアルコキシド基、カルボキシ基、又はヒドロキシ基を含む分子、塩基および酸化剤からなる群より選ばれた１種以上の化合物を用いることが好ましく、具体的な表面改質剤としては、例えば、ビニルトリメトキシシラン、ビニルトリエトキシシランなどのビニル系、３－グリシドキシプロピルメチルジメトキシシラン、３－グリシドキシプロピルメチルジエトキシシラン、３－グリシドキシプロピルトリメトキシシラン、３－グリシドキシプロピルトリエトキシシランなどのエポキシ系、ｐ－スチリルトリメトキシシランなどのスチリル系、３－メタクリロキシプロピルメチルジメトキシシラン、３－メタクリロキシプロピルトリメトキシシラン、３－メタクリロキシプロピルメチルジエトキシシラン、３－メタクリロキシプロピルトリエトキシシランなどのメタクリル系、３－アクリロキシプロピルトリメトキシシランなどのアクリル系、トリス－（トリメトキシシリルプロピル）イソシアヌレ－トなどのイソシアヌレ－ト系又は３－イソシアネ－トプロピルトリエトキシシランなどのイソシアネ－ト系、テトラエトキシシラン、過酸化水素、硝酸、硫酸、過マンガン酸カリウム、二クロム酸カリウム、次亜塩素酸ナトリウム、三酸化クロム、過硫酸アンモニウム、過硫酸カリウムなどの酸化剤、アンモニア、水酸化ナトリウム、水酸化カリウム、炭酸水素ナトリウム、炭酸水素カリウム、炭酸ナトリウム、炭酸カリウムなどの塩基が挙げられ、好ましくは３－メタクリロキシプロピルメチルジメトキシシラン、３－メタクリロキシプロピルトリメトキシシラン、３－メタクリロキシプロピルメチルジエトキシシラン、３－メタクリロキシプロピルトリエトキシシラン、テトラエトキシシラン、過酸化水素、硝酸、アンモニア、水酸化ナトリウムの群から選ばれる１種以上、特に好ましくは３－メタクリロキシプロピルトリメトキシシラン、テトラエトキシシラン、アンモニアの群から選ばれる１種以上である。 In the method for producing polymer-coated silicon particles of the present invention, when reacting silicon particles with a polymer monomer, it is preferable to modify the surface of the silicon particles in order to promote the reaction. Modification here is a process of changing the surface state of silicon particles through a chemical reaction using a surface modifier to facilitate coating with a polymer. As the surface modifying agent, it is preferable to use one or more compounds selected from the group consisting of molecules containing alkoxide groups, carboxy groups, or hydroxyl groups in the molecule, bases, and oxidizing agents. Examples of the quality agent include vinyl-based substances such as vinyltrimethoxysilane and vinyltriethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, and 3-glycidoxypropyltrimethoxysilane. Silane, epoxy systems such as 3-glycidoxypropyltriethoxysilane, styryl systems such as p-styryltrimethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropyl Methacrylic type such as methyldiethoxysilane, 3-methacryloxypropyltriethoxysilane, acrylic type such as 3-acryloxypropyltrimethoxysilane, isocyanurate type such as tris-(trimethoxysilylpropyl)isocyanurate, or -Isocyanate-based isocyanates such as propyltriethoxysilane, tetraethoxysilane, hydrogen peroxide, nitric acid, sulfuric acid, potassium permanganate, potassium dichromate, sodium hypochlorite, chromium trioxide, ammonium persulfate, Examples include oxidizing agents such as potassium persulfate, bases such as ammonia, sodium hydroxide, potassium hydroxide, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium carbonate, potassium carbonate, and preferably 3-methacryloxypropylmethyldimethoxysilane, 3 - One or more selected from the group of methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldiethoxysilane, 3-methacryloxypropyltriethoxysilane, tetraethoxysilane, hydrogen peroxide, nitric acid, ammonia, and sodium hydroxide. Particularly preferred is one or more selected from the group of 3-methacryloxypropyltrimethoxysilane, tetraethoxysilane, and ammonia.
表面改質剤を用いる際には、シリコン粒子１００質量部に対して表面改質剤を０．１～８００質量部添加することが好ましい。修飾反応中の粒子の凝集を防ぐため、必要に応じてポリカルボン酸系の安定化剤を添加してもよい。修飾反応を促進するため、必要に応じてアンモニア、水酸化ナトリウム、水酸化カリウム又は炭酸水素ナトリウムなどの水に溶けてアルカリ性を示す化合物や、塩酸、硝酸、酢酸又は硫酸などの水に溶けて酸性を示す化合物などの残存反応促進剤を添加してもよい。反応性が高く、金属化合物が残存しないことから、アンモニア又は塩酸であることが好ましい。残存反応促進剤を用いる場合、シリコン粒子１００質量部に対して残存反応促進剤を０．００５～５４質量部添加することが好ましい。反応に用いる溶媒としては表面改質剤が溶解する溶媒であればよく、水、エタノ－ル、メタノ－ル、アセトン、ジメチルホルムアミド、テトラヒドロフラン、トルエン、ヘキサン、ジクロロメタン、クロロホルムなどが挙げられ、必要に応じて混合溶媒を用いても良い。表面改質剤として３－メタクリロキシプロピルトリメトキシシラン又はテトラエトキシシランを用いてシリコン粒子表面を修飾する際には、水とエタノ－ルの混合溶媒を用いることが好ましい。該混合溶媒における各溶媒の比率は、エタノ－ル１００質量部に対して、水が１０～１００質量部であることが好ましい。該混合溶媒中のエタノ－ルの比率がこの範囲内であることで、溶媒中のシリコン粒子が分散しやすく、なおかつ、修飾反応が十分に進みやすくなる。 When using a surface modifier, it is preferable to add 0.1 to 800 parts by mass of the surface modifier to 100 parts by mass of silicon particles. In order to prevent particle aggregation during the modification reaction, a polycarboxylic acid stabilizer may be added as necessary. In order to promote the modification reaction, compounds that dissolve in water and are alkaline, such as ammonia, sodium hydroxide, potassium hydroxide, or sodium bicarbonate, or compounds that dissolve in water and are acidic, such as hydrochloric acid, nitric acid, acetic acid, or sulfuric acid, may be used as necessary. A residual reaction accelerator such as a compound exhibiting the following may be added. Ammonia or hydrochloric acid is preferable because it has high reactivity and no metal compound remains. When using a residual reaction accelerator, it is preferable to add 0.005 to 54 parts by mass of the residual reaction accelerator per 100 parts by mass of silicon particles. The solvent used for the reaction may be any solvent that can dissolve the surface modifier, and examples include water, ethanol, methanol, acetone, dimethylformamide, tetrahydrofuran, toluene, hexane, dichloromethane, and chloroform. A mixed solvent may be used depending on the situation. When modifying the surface of silicon particles using 3-methacryloxypropyltrimethoxysilane or tetraethoxysilane as a surface modifier, it is preferable to use a mixed solvent of water and ethanol. The ratio of each solvent in the mixed solvent is preferably 10 to 100 parts by weight of water to 100 parts by weight of ethanol. When the ratio of ethanol in the mixed solvent is within this range, the silicon particles in the solvent can be easily dispersed, and the modification reaction can proceed sufficiently.
シリコン粒子の表面を改質した後に、必要に応じて、ボ－ルミルやビ－ズミルを用いて上記表面改質シリコン粒子を粉砕・微粒化しても良い。解砕に用いるボ－ルはジルコニア又はアルミナが好ましい。解砕時間は１～２４時間が好ましく、より好ましくは１～１２時間である。 After modifying the surface of the silicon particles, if necessary, the surface-modified silicon particles may be pulverized and atomized using a ball mill or a bead mill. The balls used for crushing are preferably zirconia or alumina. The crushing time is preferably 1 to 24 hours, more preferably 1 to 12 hours.
また、表面改質シリコン粒子を粉砕・微粒化した後、必要に応じて遠心分離によりシリコン粒子表面を改質する際に用いた溶媒を水に置換してもよい。 Furthermore, after the surface-modified silicon particles are crushed and atomized, the solvent used when modifying the surface of the silicon particles may be replaced with water by centrifugation, if necessary.
シリコン粒子と高分子モノマーの反応中は、マグネチックスタ－ラ－、スリ－ワンモ－タ－、ホモミキサ－、インラインミキサ－、ビ－ズミル、ボ－ルミルなどの一般的な混合機や攪拌機を用い、各原料を均一に混合することが好ましい。反応温度は４０～１００℃が好ましい。また、反応時間は０．５～７２時間が好ましく、より好ましくは０．５～２４時間である。反応時間がこの範囲であることで、修飾反応が十分に進行し、なおかつ、生産性が低下しにくくなる。 During the reaction between silicon particles and polymeric monomers, general mixers and stirrs such as magnetic stirrer, three-in-one motor, homomixer, in-line mixer, bead mill, and ball mill are used. It is preferable to uniformly mix each raw material. The reaction temperature is preferably 40 to 100°C. Further, the reaction time is preferably 0.5 to 72 hours, more preferably 0.5 to 24 hours. When the reaction time is within this range, the modification reaction can proceed sufficiently, and productivity is less likely to decrease.
シリコン粒子に反応させる高分子モノマーとしては、例えば、スチレン、メタクリル酸、メタクリル酸メチル、メタクリル酸エチル、メタクリル酸ｎ－プロピル、メタクリル酸イソプロピル、メタクリル酸ｎ－ブチル、メタクリル酸ｓｅｃ－ブチル、メタクリル酸イソブチル、メタクリル酸ｔｅｒｔ－ブチル、メタクリル酸２－エチルへキシル、メタクリル酸イソボニル、メタクリル酸ベンジル、メタクリル酸２－ヒドロキシエチル、メタクリル酸ヒドロキシプロピル、メタクリル酸ヒドロキシブチル、メタクリル酸トリエチレングリコ－ルなどのメタクリル酸系、イタコン酸無水物、イタコン酸、アクリル酸、アクリル酸メチル、アクリル酸エチル、アクリル酸ｎ－プロピル、アクリル酸イソプロピル、アクリル酸ｎ－ブチル、アクリル酸ｓｅｃ－ブチル、アクリル酸イソブチル、アクリル酸ｔｅｒｔ－ブチル、アクリル酸２－エチルへキシル、アクリル酸イソボルニル、アクリル酸ベンジル、アクリル酸フェニル、アクリル酸グリシジル、アクリル酸２－ヒドロキシエチル、アクリル酸ヒドロキシプロピル、アクリル酸ヒドロキシブチルなどのアクリル酸系、メタクリルアミド、Ｎ－メチルアクリルアミド、Ｎ、Ｎ’－ジメチルアクリルアミド、Ｎ－ｔｅｒｔ－ブチルメタクリルアミド、Ｎ－ｎ－ブチルメタクリルアミド、Ｎ－メチロ－ルメタクリルアミド、Ｎ－エチロ－ルメタクリルアミドなどのメタクリルアミド系、Ｎ，Ｎ’－メチレンビスアクリルアミド、Ｎ－イソプロピルアクリルアミド、Ｎ－ｔｅｒｔ－ブチルアクリルアミド、Ｎ－ｎ－ブチルアクリルアミド、Ｎ－メチロ－ルアクリルアミド、Ｎ－エチロ－ルアクリルアミドなどのアクリルアミド系、安息香酸ビニル、ジエチルアミノスチレン、ジエチルアミノアルファ－メチルスチレン、ｐ－ビニルベンゼンスルホン酸、ｐ－ビニルベンゼンスルホン酸ナトリウム塩、ｐ－ビニルベンゼンスルホン酸リチウム塩、ジビニルベンゼン、酢酸ビニル、酢酸ブチル、塩化ビニル、フッ化ビニル、臭化ビニル、無水マレイン酸、Ｎ－フェニルマレイミド、Ｎ－ブチルマレイミド、Ｎ－ビニルピロリドン、Ｎ－ビニルカルバゾ－ル、アクリロニトリル、アニリン、ピロ－ル、ウレタン重合に用いられるポリオ－ル系又はイソシアネ－ト系が挙げられ、好ましくはスチレン、メタクリル酸、メタクリル酸メチル、メタクリル酸エチル、メタクリル酸ｎ－プロピル、メタクリル酸イソプロピル、メタクリル酸ｎ－ブチル、メタクリル酸ｓｅｃ－ブチル、メタクリル酸イソブチル、メタクリル酸ｔｅｒｔ－ブチル、メタクリル酸２－エチルへキシル、メタクリル酸イソボニル、メタクリル酸ベンジル、メタクリル酸２－ヒドロキシエチル、メタクリル酸ヒドロキシプロピル、メタクリル酸ヒドロキシブチル、メタクリル酸トリエチレングリコ－ルなどのメタクリル酸系、イタコン酸無水物、イタコン酸、アクリル酸、アクリル酸メチル、アクリル酸エチル、アクリル酸ｎ－プロピル、アクリル酸イソプロピル、アクリル酸ｎ－ブチル、アクリル酸ｓｅｃ－ブチル、アクリル酸イソブチル、アクリル酸ｔｅｒｔ－ブチル、アクリル酸２－エチルへキシル、アクリル酸イソボルニル、アクリル酸ベンジル、アクリル酸フェニル、アクリル酸グリシジル、アクリル酸２－ヒドロキシエチル、アクリル酸ヒドロキシプロピル、アクリル酸ヒドロキシブチルなどのアクリル酸系、アクリロニトリルであり、さらに好ましくは、スチレン、メタクリル酸メチル、メタクリル酸エチル、メタクリル酸ｎ－プロピル、メタクリル酸ｎ－ブチル、アクリル酸メチル、アクリル酸エチル、アクリル酸ｎ－プロピル、アクリル酸ｎ－ブチル、アクリロニトリル、特に好ましくはスチレン、メタクリル酸メチル又はアクリル酸メチルである。 Examples of polymeric monomers reacted with silicon particles include styrene, methacrylic acid, methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, sec-butyl methacrylate, and methacrylic acid. Isobutyl, tert-butyl methacrylate, 2-ethylhexyl methacrylate, isobornyl methacrylate, benzyl methacrylate, 2-hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxybutyl methacrylate, triethylene glycol methacrylate, etc. Methacrylic acid, itaconic anhydride, itaconic acid, acrylic acid, methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, sec-butyl acrylate, isobutyl acrylate, acrylic Acrylic acids such as tert-butyl acrylate, 2-ethylhexyl acrylate, isobornyl acrylate, benzyl acrylate, phenyl acrylate, glycidyl acrylate, 2-hydroxyethyl acrylate, hydroxypropyl acrylate, and hydroxybutyl acrylate. , methacrylamide, N-methylacrylamide, N,N'-dimethylacrylamide, N-tert-butylmethacrylamide, Nn-butylmethacrylamide, N-methylolmethacrylamide, N-ethylolmethacrylamide, etc. Acrylamide types such as methacrylamide type, N,N'-methylenebisacrylamide, N-isopropylacrylamide, N-tert-butylacrylamide, N-n-butylacrylamide, N-methylol-acrylamide, N-ethylol-acrylamide, Vinyl benzoate, diethylaminostyrene, diethylamino alpha-methylstyrene, p-vinylbenzenesulfonic acid, p-vinylbenzenesulfonic acid sodium salt, p-vinylbenzenesulfonic acid lithium salt, divinylbenzene, vinyl acetate, butyl acetate, vinyl chloride, Vinyl fluoride, vinyl bromide, maleic anhydride, N-phenylmaleimide, N-butylmaleimide, N-vinylpyrrolidone, N-vinylcarbazole, acrylonitrile, aniline, pyrrole, polyols used in urethane polymerization or isocyanate type, preferably styrene, methacrylic acid, methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, sec-butyl methacrylate, isobutyl methacrylate, Methacrylic acids such as tert-butyl methacrylate, 2-ethylhexyl methacrylate, isobornyl methacrylate, benzyl methacrylate, 2-hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxybutyl methacrylate, triethylene glycol methacrylate, etc. system, itaconic anhydride, itaconic acid, acrylic acid, methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, sec-butyl acrylate, isobutyl acrylate, tert acrylate -Acrylic acids such as butyl, 2-ethylhexyl acrylate, isobornyl acrylate, benzyl acrylate, phenyl acrylate, glycidyl acrylate, 2-hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, acrylonitrile More preferably, styrene, methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, n-butyl methacrylate, methyl acrylate, ethyl acrylate, n-propyl acrylate, n-butyl acrylate, acrylonitrile , particularly preferably styrene, methyl methacrylate or methyl acrylate.
用いる開始剤としては、例えば、アゾビスイソブチロニトリルなどのアゾ系化合物、過硫酸カリウム、過硫酸アンモニウム、過酸化ベンゾイル、ジイソブチリルパ－オキシド、ジ－ｎ－プロピルパ－オキシジカ－ボネ－ト、ジイソプロピルパ－オキシジカ－ボネ－ト、ジラウロイルパ－オキシド、ジベンゾイルパ－オキシド、１，１－ジ（ｔｅｒｔ－へキシルペルオキシ）シクロヘキサン、１，１－ジ（ｔｅｒｔ－ブチルペルオキシ）シクロヘキサン、ｔｅｒｔ－ブチルヒドロパ－オキシドやジイソブチリルパ－オキシド、ｔｅｒｔ－ヘキシルペルオキシイソプロピルモノカルボネ－ト、ｔｅｒｔ－ブチルペルオキシイソプロピルモノカルボネ－ト、２，５－ジ－メチル－２，５－ジ（ベンゾイルペルオキシ）ヘキサン、ｔｅｒｔ－ブチルペルオキシアセテ－ト、ジ－ｔｅｒｔ－ヘキシルペルオキシド、ジ－ｔｅｒｔ－ブチルペルオキシド、ジイソプロピルベンゼンヒドロペルオキシド、ｔｅｒｔ－ブチルヒドロペルオキシド等の過酸化物が挙げられる。 Examples of the initiator used include azo compounds such as azobisisobutyronitrile, potassium persulfate, ammonium persulfate, benzoyl peroxide, diisobutyryl peroxide, di-n-propyl peroxydicarbonate, and diisopropyl peroxide. Oxydicarbonate, dilauroyl peroxide, dibenzoyl peroxide, 1,1-di(tert-hexylperoxy)cyclohexane, 1,1-di(tert-butylperoxy)cyclohexane, tert-butylhydroperoxide and diisobutyrylperoxide , tert-hexylperoxyisopropyl monocarbonate, tert-butylperoxyisopropyl monocarbonate, 2,5-di-methyl-2,5-di(benzoylperoxy)hexane, tert-butylperoxyacetate, Examples include peroxides such as di-tert-hexyl peroxide, di-tert-butyl peroxide, diisopropylbenzene hydroperoxide, and tert-butyl hydroperoxide.
高分子モノマーのスラリーとする際に用いる溶媒としては、例えば、水、エタノ－ル、メタノ－ル、イソプロピルアルコ－ル、プロパノ－ル又はトルエンなどが挙げられ、好ましくは水、エタノ－ル又はメタノ－ル、特に好ましくは水又はエタノ－ルである。これらは１種又は２種以上用いることができる。 Examples of the solvent used when making a slurry of polymer monomers include water, ethanol, methanol, isopropyl alcohol, propanol, or toluene, and preferably water, ethanol, or methanol. -ol, particularly preferably water or ethanol. One or more types of these can be used.
高分子モノマーのスラリーにおける高分子モノマーの含有量は、０．５～２０重量％が好ましく、特に好ましくは１．５～１０重量％である。高分子モノマーの含有量がこの範囲であることで、シリコン粒子周囲の被覆体が十分な厚みとなる。 The content of the polymer monomer in the polymer monomer slurry is preferably 0.5 to 20% by weight, particularly preferably 1.5 to 10% by weight. When the content of the polymer monomer is within this range, the coating around the silicon particles has a sufficient thickness.
高分子モノマーのスラリーにおける開始剤の含有量は、０．０１～３重量％が好ましく、特に好ましくは０．０１～１重量％である。 The content of the initiator in the polymer monomer slurry is preferably 0.01 to 3% by weight, particularly preferably 0.01 to 1% by weight.
高分子モノマーのスラリーにおいては、シリコン粒子の分散性を向上させるため、又は重合を促進させるため、分散剤を含有することが好ましく、該分散剤としては、例えば、ポリビニルピロリドン、スチレンスルホン酸ナトリウム、スチレンスルホン酸リチウム、スチレンスルホン酸アンモニウム、スチレンスルホン酸エチルエステルなどのスチレンスルホン酸系、カルボキシスチレン、ポリアクリル酸、ポリメタクリル酸などのポリカルボン酸系、ナフタレンスルホン酸ホルマリン縮合系、ポリエチレングリコ－ル、ポリカルボン酸部分アルキルエステル系、ポリエ－テル系、ポリアルキレンポリアミン系、アルキルスルホン酸系、四級アンモニウム系、高級アルコ－ルアルキレンオキサイド系、多価アルコ－ルエステル系、アルキルポリアミン系又はポリリン酸塩系が挙げられ、好ましくはポリアクリル酸系添加剤、スチレンスルホン酸系、ポリビニルピロリドン、特に好ましくはスチレンスルホン酸系及びポリビニルピロリドンである。 In order to improve the dispersibility of silicon particles or to promote polymerization, the slurry of polymer monomers preferably contains a dispersant, such as polyvinylpyrrolidone, sodium styrene sulfonate, Styrene sulfonic acids such as lithium styrene sulfonate, ammonium styrene sulfonate, and ethyl styrene sulfonate, polycarboxylic acids such as carboxystyrene, polyacrylic acid, and polymethacrylic acid, naphthalene sulfonic acid formalin condensation systems, and polyethylene glycol. , polycarboxylic acid partial alkyl ester type, polyether type, polyalkylene polyamine type, alkyl sulfonic acid type, quaternary ammonium type, higher alcohol alkylene oxide type, polyhydric alcohol ester type, alkyl polyamine type or polyphosphoric acid type. Examples include salt-based additives, preferably polyacrylic acid-based additives, styrene sulfonic acid-based additives, and polyvinylpyrrolidone, particularly preferably styrene sulfonic acid-based additives and polyvinylpyrrolidone.
高分子モノマースラリーにおける分散剤の含有量は、３重量％以下が好ましく、特に好ましくは０．００１～２重量％である。分散剤の量がこの範囲内にあることで、シリコン粒子同士の凝集が進行しにくくなる。もしくは、シリコン粒子周囲のポリマー膜厚が薄くなりにくくなる。 The content of the dispersant in the polymer monomer slurry is preferably 3% by weight or less, particularly preferably 0.001 to 2% by weight. When the amount of the dispersant is within this range, aggregation of silicon particles with each other becomes difficult to proceed. Alternatively, the thickness of the polymer film around the silicon particles becomes difficult to become thin.
高分子モノマースラリーにおいては、重合を促進するために、重合促進剤を含有してもよい。該重合促進剤としては、例えば、炭酸水素ナトリウム又は水酸化カリウムなどのｐＨ調整剤が挙げられ、好ましくは炭酸水素ナトリウムである。 The polymer monomer slurry may contain a polymerization promoter to promote polymerization. Examples of the polymerization accelerator include pH adjusters such as sodium hydrogen carbonate and potassium hydroxide, with sodium hydrogen carbonate being preferred.
本発明のポリマー被覆シリコン粒子は、高効率ＬＥＤや太陽電池等に用いることができる。 The polymer-coated silicon particles of the present invention can be used in high-efficiency LEDs, solar cells, and the like.
以下、実施例により、本発明についてさらに詳細に説明するが、本発明はこれらに限定されるものではない。 EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto.
＜実施例１＞
（シリコン粉砕工程）
粒径（Ｄ５０）が７μｍのケミカルグレ－ドの金属シリコン（純度３Ｎ）をエタノ－ルに２０重量％混合し、直径０．３ｍｍのジルコニアビ－ズを用いた微粉砕湿式ビ－ズミルを９時間行い、粒径（Ｄ５０）２００ｎｍ、乾燥時のＢＥＴ比表面積が１００ｍ２／ｇのシリコンスラリーを得た。なお、ＢＥＴ比表面積は、窒素吸着によるＢＥＴ法（ＪＩＳ Ｚ ８８３０、一点法）を用いて測定された値である。
<Example 1>
(Silicon crushing process)
Chemical grade metallic silicon (purity 3N) with a particle size (D50) of 7 μm was mixed with ethanol in an amount of 20% by weight, and pulverized using a wet bead mill using zirconia beads with a diameter of 0.3 mm. A silicon slurry having a particle size (D50) of 200 nm and a BET specific surface area of 100 m 2 /g when dried was obtained. Note that the BET specific surface area is a value measured using the BET method (JIS Z 8830, single point method) using nitrogen adsorption.
（シリコン表面改質工程）
上記粉砕シリコンスラリーを３７ｇビ－カ－に投入し、１５分間超音波照射を行い、その後、追加エタノ－ル９４ｇを追加し、シリコンスラリーを得た。その後、ポリカルボン酸系分散剤１１ｇ、アンモニウムヒドロキシド４．５ｇ、水４０ｇを上記シリコンスラリーに添加し、マグネチックスターラーを用いて回転数２５０ｒｐｍの条件で１時間撹拌を行った。その後、テトラエトキシシラン（ＴＥＯＳ）１０ｇを上記スラリーに添加した。室温で１．５時間撹拌を行い、その後、得られたシリコンスラリーを回転数４８００ｒｐｍ、回転時間１０分の条件で遠心分離処理し、エタノ－ルで再分散した。得られたスラリーに対して、直径１．０ｍｍのジルコニアボ－ルを用いたボ－ルミルを８時間行い、粒径（Ｄ５０）２５６ｎｍのシリコンスラリーを得た。これを回転数４８００ｒｐｍ、回転時間６０分の条件で遠心分離処理し、水で再分散した。
(Silicon surface modification process)
37 g of the above-mentioned pulverized silicone slurry was put into a beaker and subjected to ultrasonic irradiation for 15 minutes, and then an additional 94g of ethanol was added to obtain a silicone slurry. Thereafter, 11 g of a polycarboxylic acid dispersant, 4.5 g of ammonium hydroxide, and 40 g of water were added to the silicone slurry, and stirred for 1 hour at a rotation speed of 250 rpm using a magnetic stirrer. Then, 10 g of tetraethoxysilane (TEOS) was added to the slurry. After stirring at room temperature for 1.5 hours, the obtained silicone slurry was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 10 minutes, and redispersed with ethanol. The obtained slurry was subjected to a ball mill using zirconia balls having a diameter of 1.0 mm for 8 hours to obtain a silicon slurry having a particle size (D50) of 256 nm. This was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 60 minutes, and redispersed with water.
（ポリマー被覆工程）
上記スラリーをシリコン固形分量が０．７９ｇとなるように秤量して丸底フラスコに移し、合計の水量が２１８ｇとなるように追加で水を添加した。フラスコ系内を窒素パ－ジした後、液温を３５℃に昇温した。その後、３－メタクリロキシプロピルトリメトキシシラン（ＭＰＳ）０．０３ｇをフラスコ内に加え、３０分間攪拌した。蒸留したスチレンモノマー５．０ｇと８ｇの水に溶解させたｐ－スチレンスルホン酸ナトリウム（ＮａＳＳ）０．０３ｇを添加し、２時間攪拌した。その後、液温を６２℃に昇温させ、８ｇの水に溶解させた過硫酸アンモニウム（ＡＰＳ）０．１１ｇを添加した。その後、還流下で１０時間加熱撹拌を続けた。得られた反応液を回転数４８００ｒｐｍ、回転時間４５分の条件で遠心分離処理し、沈殿をエタノ－ルで再分散することでポリマー被覆シリコンのスラリーを得た。ポリマー被覆シリコン粒子のＤ５０は３４９ｎｍ、シリコン粒子の平均長径度は２．２、シリコン粒子に対する被覆ポリマーの体積比は６．３、１つのポリマー内に含まれる平均シリコン粒子数は１．４であった。
(Polymer coating process)
The slurry was weighed so that the silicon solid content was 0.79 g and transferred to a round bottom flask, and additional water was added so that the total amount of water was 218 g. After purging the inside of the flask with nitrogen, the liquid temperature was raised to 35°C. Thereafter, 0.03 g of 3-methacryloxypropyltrimethoxysilane (MPS) was added into the flask and stirred for 30 minutes. 5.0 g of distilled styrene monomer and 0.03 g of sodium p-styrene sulfonate (NaSS) dissolved in 8 g of water were added and stirred for 2 hours. Thereafter, the liquid temperature was raised to 62° C., and 0.11 g of ammonium persulfate (APS) dissolved in 8 g of water was added. Thereafter, the mixture was heated and stirred under reflux for 10 hours. The resulting reaction solution was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 45 minutes, and the precipitate was redispersed with ethanol to obtain a slurry of polymer-coated silicone. The D50 of the polymer-coated silicon particles was 349 nm, the average major diameter of the silicon particles was 2.2, the volume ratio of the coating polymer to the silicon particles was 6.3, and the average number of silicon particles contained in one polymer was 1.4. Ta.
＜実施例２＞
（シリコン表面改質工程）
実施例１のシリコン粉砕工程と同様の手法で得た粉砕シリコンを固形分量が１００ｇとなるように秤量し、その後、超音波照射を１５分間行い、合計のエタノ－ル量が２５２８ｇとなるように追加でエタノ－ルを添加してシリコンスラリーを得た。その後、ポリカルボン酸系分散剤２２０ｇ、アンモニウムヒドロキシド１８０ｇ、水８００ｇを上記シリコンスラリーに添加し、攪拌羽を用いて回転数３００ｒｐｍの条件で１時間撹拌を行った。その後、ＴＥＯＳ５．２ｇを上記スラリーに添加した。室温で１．５時間撹拌を行い、その後、得られたシリコンスラリーを回転数４８００ｒｐｍ、回転時間２５分の条件で遠心分離処理し、エタノ－ルで再分散した。得られたスラリーに対して、直径１．０ｍｍのジルコニアボ－ルを用いたボ－ルミルを８時間行い、粒径（Ｄ５０）２４８ｎｍのシリコンスラリーを得た。これを回転数４８００ｒｐｍ、回転時間６０分の条件で遠心分離処理し、水で再分散した。
<Example 2>
(Silicon surface modification process)
The crushed silicon obtained by the same method as the silicon crushing process of Example 1 was weighed so that the solid content was 100 g, and then ultrasonic irradiation was performed for 15 minutes so that the total amount of ethanol was 2528 g. Ethanol was additionally added to obtain a silicon slurry. Thereafter, 220 g of a polycarboxylic acid dispersant, 180 g of ammonium hydroxide, and 800 g of water were added to the silicone slurry, and stirred for 1 hour at a rotation speed of 300 rpm using a stirring blade. Thereafter, 5.2 g of TEOS was added to the slurry. Stirring was performed at room temperature for 1.5 hours, and then the obtained silicone slurry was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 25 minutes, and redispersed with ethanol. The obtained slurry was subjected to a ball mill using zirconia balls having a diameter of 1.0 mm for 8 hours to obtain a silicon slurry having a particle size (D50) of 248 nm. This was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 60 minutes, and redispersed with water.
（ポリマー被覆工程）
分散剤としてｐ－スチレンスルホン酸リチウム（ＬｉＳＳ）を用いる以外は実施例１と同様の方法でポリマー被覆シリコンのスラリーを得た。ポリマー被覆シリコン粒子のＤ５０は３３２ｎｍ、シリコン粒子の平均長径度は２．２、シリコン粒子に対する被覆ポリマーの体積比は５．４、１つのポリマー内に含まれる平均シリコン粒子数は１．５であった。
(Polymer coating process)
A slurry of polymer-coated silicon was obtained in the same manner as in Example 1 except that lithium p-styrene sulfonate (LiSS) was used as a dispersant. The D50 of the polymer-coated silicon particles is 332 nm, the average length of the silicon particles is 2.2, the volume ratio of the coating polymer to the silicon particles is 5.4, and the average number of silicon particles contained in one polymer is 1.5. Ta.
＜実施例３＞
（シリコン表面改質工程）
実施例１のシリコン粉砕工程と同様の手法で得た粉砕シリコンを固形分量が４０ｇとなるように秤量し、その後、超音波照射を１５分間行い、合計のエタノ－ル量が１０１１ｇとなるように追加でエタノ－ルを添加してシリコンスラリーを得た。その後、ポリカルボン酸系分散剤８８ｇ、アンモニウムヒドロキシド７．２ｇ、水３２０ｇを上記シリコンスラリーに添加し、攪拌羽を用いて回転数２５０ｒｐｍの条件で５時間撹拌を行った。その後、得られたシリコンスラリーを回転数４８００ｒｐｍ、回転時間２５分の条件で遠心分離処理し、エタノ－ルで再分散した。得られたスラリーに対して、直径１．０ｍｍのジルコニアボ－ルを用いたボ－ルミルを８時間行い、粒径（Ｄ５０）２４３ｎｍのシリコンスラリーを得た。これを回転数４８００ｒｐｍ、回転時間６０分の条件で遠心分離処理し、水で再分散した。
<Example 3>
(Silicon surface modification process)
The crushed silicon obtained by the same method as the silicon crushing step of Example 1 was weighed so that the solid content was 40 g, and then ultrasonic irradiation was performed for 15 minutes so that the total amount of ethanol was 1011 g. Ethanol was additionally added to obtain a silicon slurry. Thereafter, 88 g of a polycarboxylic acid dispersant, 7.2 g of ammonium hydroxide, and 320 g of water were added to the silicone slurry, and stirred using a stirring blade at a rotation speed of 250 rpm for 5 hours. Thereafter, the obtained silicon slurry was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 25 minutes, and redispersed with ethanol. The obtained slurry was subjected to a ball mill using zirconia balls having a diameter of 1.0 mm for 8 hours to obtain a silicon slurry having a particle size (D50) of 243 nm. This was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 60 minutes, and redispersed with water.
（ポリマー被覆工程）
実施例１と同様の方法でポリマー被覆シリコンのスラリーを得た。ポリマー被覆シリコン粒子のＤ５０は２９７ｎｍ、シリコン粒子の平均長径度は２．５、シリコン粒子に対する被覆ポリマーの体積比は６．６、１つのポリマー内に含まれる平均シリコン粒子数は１．３であった。
(Polymer coating process)
A slurry of polymer-coated silicone was obtained in the same manner as in Example 1. The D50 of the polymer-coated silicon particles was 297 nm, the average length of the silicon particles was 2.5, the volume ratio of the coating polymer to the silicon particles was 6.6, and the average number of silicon particles contained in one polymer was 1.3. Ta.
＜実施例４＞
（シリコン表面改質工程）
実施例１のシリコン粉砕工程と同様の手法で得た粉砕シリコンを固形分量が５２．５ｇとなるように秤量し、その後、超音波照射を１５分間行い、合計のエタノ－ル量が１３２７ｇとなるように追加でエタノ－ルを添加してシリコンスラリーを得た。その後、ポリカルボン酸系分散剤１１６ｇ、１０ｍｏｌ／Ｌの塩酸３．５ｇ、水４２０ｇを上記シリコンスラリーに添加し、攪拌羽を用いて回転数２５０ｒｐｍの条件で３０分間攪拌を行った。その後、ＴＥＯＳ１０５ｇを上記スラリーに添加し、液温を７０℃に昇温した。７０℃で１２時間撹拌を行い、その後、得られたシリコンスラリーを回転数４８００ｒｐｍ、回転時間２５分の条件で遠心分離処理し、エタノ－ルで再分散した。得られたスラリーに対して、直径１．０ｍｍのジルコニアボ－ルを用いたボ－ルミルを８時間行い、粒径（Ｄ５０）２３８ｎｍのシリコンスラリーを得た。これを回転数４８００ｒｐｍ、回転時間６０分の条件で遠心分離処理し、水で再分散した。
<Example 4>
(Silicon surface modification process)
The crushed silicon obtained by the same method as the silicon crushing process of Example 1 was weighed so that the solid content was 52.5 g, and then ultrasonic irradiation was performed for 15 minutes, so that the total amount of ethanol was 1327 g. Ethanol was additionally added to obtain a silicon slurry. Thereafter, 116 g of a polycarboxylic acid dispersant, 3.5 g of 10 mol/L hydrochloric acid, and 420 g of water were added to the silicone slurry, and stirred for 30 minutes at a rotation speed of 250 rpm using a stirring blade. Thereafter, 105 g of TEOS was added to the slurry, and the liquid temperature was raised to 70°C. Stirring was performed at 70° C. for 12 hours, and then the obtained silicone slurry was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 25 minutes, and redispersed with ethanol. The obtained slurry was subjected to a ball mill using zirconia balls having a diameter of 1.0 mm for 8 hours to obtain a silicon slurry having a particle size (D50) of 238 nm. This was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 60 minutes, and redispersed with water.
（ポリマー被覆工程）
上記スラリーをシリコン固形分量が０．７９ｇとなるように秤量して丸底フラスコに移し、合計の水量が１７５ｇとなるように追加で水を添加した。フラスコ系内を窒素パ－ジした後、液温を３５℃に昇温した。その後、３－メタクリロキシプロピルトリメトキシシラン（ＭＰＳ）０．０３ｇをフラスコ内に加え、３０分間攪拌した。蒸留したスチレンモノマー５．０ｇと８ｇの水に溶解させたポリビニルピロリドンＫ３０（ＰＶＰ）１．０ｇを添加し、２時間攪拌した。その後、液温を６０℃に昇温させ、３５ｇのエタノールに溶解させたアゾビスイソブチロニトリル（ＡＩＢＮ）８ｍｇを添加した。その後、還流下で１０時間加熱撹拌を続けた。得られた反応液を回転数４８００ｒｐｍ、回転時間４５分の条件で遠心分離処理し、沈殿をエタノ－ルで再分散することでポリマー被覆シリコンのスラリーを得た。ポリマー被覆シリコン粒子のＤ５０は５０３ｎｍ、シリコン粒子の平均長径度は２．２、シリコン粒子に対する被覆ポリマーの体積比は５．６、１つのポリマー内に含まれる平均シリコン粒子数は１．６であった。
(Polymer coating process)
The slurry was weighed so that the silicon solid content was 0.79 g and transferred to a round bottom flask, and additional water was added so that the total amount of water was 175 g. After purging the inside of the flask with nitrogen, the liquid temperature was raised to 35°C. Thereafter, 0.03 g of 3-methacryloxypropyltrimethoxysilane (MPS) was added into the flask and stirred for 30 minutes. 5.0 g of distilled styrene monomer and 1.0 g of polyvinylpyrrolidone K30 (PVP) dissolved in 8 g of water were added and stirred for 2 hours. Thereafter, the liquid temperature was raised to 60° C., and 8 mg of azobisisobutyronitrile (AIBN) dissolved in 35 g of ethanol was added. Thereafter, the mixture was heated and stirred under reflux for 10 hours. The resulting reaction solution was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 45 minutes, and the precipitate was redispersed with ethanol to obtain a slurry of polymer-coated silicone. The D50 of the polymer-coated silicon particles is 503 nm, the average length of the silicon particles is 2.2, the volume ratio of the coating polymer to the silicon particles is 5.6, and the average number of silicon particles contained in one polymer is 1.6. Ta.
＜実施例５＞
（シリコン粉砕工程）
粒径（Ｄ５０）が７μｍのケミカルグレ－ドの金属シリコン（純度３Ｎ）をエタノ－ルに２０重量％混合し、直径０．３ｍｍのジルコニアビ－ズを用いた微粉砕湿式ビ－ズミルを６時間行い、粒径（Ｄ５０）２８８ｎｍ、乾燥時のＢＥＴ比表面積が６８ｍ２／ｇのシリコンスラリーを得た。
<Example 5>
(Silicon crushing process)
Chemical grade metallic silicon (purity 3N) with a particle size (D50) of 7 μm was mixed with ethanol in an amount of 20% by weight, and pulverized using a wet bead mill using zirconia beads with a diameter of 0.3 mm. A silicon slurry having a particle size (D50) of 288 nm and a BET specific surface area of 68 m 2 /g when dried was obtained.
（シリコン表面改質工程）
上記粉砕シリコンスラリーを固形分量が１０ｇとなるように秤量し、その後、超音波照射を１５分間行い、合計のエタノ－ル量が２５３ｇとなるように追加でエタノ－ルを添加してシリコンスラリーを得た。その後、ポリカルボン酸系分散剤２２ｇ、アンモニウムヒドロキシド９．０ｇ、水８０ｇを上記シリコンスラリーに添加し、マグネチックスターラーを用いて回転数２５０ｒｐｍの条件で１時間撹拌を行った。その後、ＴＥＯＳ２０ｇを上記スラリーに添加した。室温で１．５時間撹拌を行い、その後、得られたシリコンスラリーを回転数４８００ｒｐｍ、回転時間２５分の条件で遠心分離処理し、エタノ－ルで再分散した。得られたスラリーに対して、直径１．０ｍｍのジルコニアボ－ルを用いたボ－ルミルを８時間行い、粒径（Ｄ５０）３１７ｎｍのシリコンスラリーを得た。これを回転数４８００ｒｐｍ、回転時間６０分の条件で遠心分離処理し、水で再分散した。
(Silicon surface modification process)
The above-mentioned pulverized silicone slurry was weighed so that the solid content was 10g, and then ultrasonic irradiation was performed for 15 minutes, and additional ethanol was added so that the total amount of ethanol was 253g to make the silicone slurry. Obtained. Thereafter, 22 g of a polycarboxylic acid dispersant, 9.0 g of ammonium hydroxide, and 80 g of water were added to the silicone slurry, and stirred for 1 hour at a rotation speed of 250 rpm using a magnetic stirrer. Then, 20 g of TEOS was added to the slurry. Stirring was performed at room temperature for 1.5 hours, and then the obtained silicone slurry was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 25 minutes, and redispersed with ethanol. The obtained slurry was subjected to a ball mill using zirconia balls having a diameter of 1.0 mm for 8 hours to obtain a silicon slurry having a particle size (D50) of 317 nm. This was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 60 minutes, and redispersed with water.
（ポリマー被覆工程）
上記スラリーをシリコン固形分量が２．７７ｇとなるように秤量して丸底フラスコに移し、合計の水量が７６５ｇとなるように追加で水を添加した。フラスコ系内を窒素パ－ジした後、液温を３５℃に昇温した。その後、ＭＰＳ０．１１ｇをフラスコ内に加え、３０分間攪拌した。蒸留したスチレンモノマー１７．５ｇと１０ｇの水に溶解させたＮａＳＳ０．０８ｇを添加し、２時間攪拌した。その後、液温を６２℃に昇温させ、１０ｇの水に溶解させたＡＰＳ０．３９ｇを添加した。その後、還流下で１０時間加熱撹拌を続けた。得られた反応液を回転数４８００ｒｐｍ、回転時間４５分の条件で遠心分離処理し、沈殿をエタノ－ルで再分散することでポリマー被覆シリコンのスラリーを得た。ポリマー被覆シリコン粒子のＤ５０は３４８ｎｍ、シリコン粒子の平均長径度は２．３、シリコン粒子に対する被覆ポリマーの体積比は４．６、１つのポリマー内に含まれる平均シリコン粒子数は１．３であった。
(Polymer coating process)
The slurry was weighed so that the silicon solid content was 2.77 g and transferred to a round bottom flask, and additional water was added so that the total amount of water was 765 g. After purging the inside of the flask with nitrogen, the liquid temperature was raised to 35°C. Then, 0.11 g of MPS was added into the flask and stirred for 30 minutes. 17.5 g of distilled styrene monomer and 0.08 g of NaSS dissolved in 10 g of water were added and stirred for 2 hours. Thereafter, the liquid temperature was raised to 62° C., and 0.39 g of APS dissolved in 10 g of water was added. Thereafter, the mixture was heated and stirred under reflux for 10 hours. The resulting reaction solution was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 45 minutes, and the precipitate was redispersed with ethanol to obtain a slurry of polymer-coated silicone. The D50 of the polymer-coated silicon particles was 348 nm, the average length of the silicon particles was 2.3, the volume ratio of the coating polymer to the silicon particles was 4.6, and the average number of silicon particles contained in one polymer was 1.3. Ta.
＜実施例６＞
（シリコン粉砕工程）
粒径（Ｄ５０）が７μｍのケミカルグレ－ドの金属シリコン（純度３Ｎ）をエタノ－ルに２０重量％混合し、直径０．３ｍｍのジルコニアビ－ズを用いた微粉砕湿式ビ－ズミルを行い、粒径（Ｄ５０）３２５ｎｍ、乾燥時のＢＥＴ比表面積が３４ｍ２／ｇのシリコンスラリーを得た。
<Example 6>
(Silicon crushing process)
Chemical grade metallic silicon (purity 3N) with a particle size (D50) of 7 μm was mixed with ethanol at 20% by weight, and a wet bead mill was used to pulverize the mixture using zirconia beads with a diameter of 0.3 mm. A silicon slurry having a particle size (D50) of 325 nm and a BET specific surface area of 34 m 2 /g when dried was obtained.
（シリコン表面改質工程）
上記粉砕シリコンスラリーを固形分量が１７．５ｇとなるように秤量し、その後、超音波照射を１５分間行い、合計のエタノ－ル量が４４２ｇとなるように追加でエタノ－ルを添加してシリコンスラリーを得た。その後、ポリカルボン酸系分散剤３８．５ｇ、１０ｍｏｌ／Ｌの塩酸１．２ｇ、水１４０ｇを上記シリコンスラリーに添加し、攪拌羽を用いて回転数２５０ｒｐｍの条件で３０分間攪拌を行った。その後、ＴＥＯＳ３５ｇを上記スラリーに添加し、液温を７０℃に昇温した。７０℃で１２時間撹拌を行い、その後、得られたシリコンスラリーを回転数４８００ｒｐｍ、回転時間２５分の条件で遠心分離処理し、エタノ－ルで再分散した。得られたスラリーに対して、直径１．０ｍｍのジルコニアボ－ルを用いたボ－ルミルを８時間行い、粒径（Ｄ５０）３２１ｎｍのシリコンスラリーを得た。これを回転数４８００ｒｐｍ、回転時間６０分の条件で遠心分離処理し、水で再分散した。
(Silicon surface modification process)
The above-mentioned pulverized silicon slurry was weighed so that the solid content was 17.5 g, and then ultrasonic irradiation was performed for 15 minutes, and additional ethanol was added so that the total amount of ethanol was 442 g. Got slurry. Thereafter, 38.5 g of a polycarboxylic acid dispersant, 1.2 g of 10 mol/L hydrochloric acid, and 140 g of water were added to the silicone slurry, and stirred using a stirring blade at a rotation speed of 250 rpm for 30 minutes. Thereafter, 35 g of TEOS was added to the slurry, and the liquid temperature was raised to 70°C. Stirring was performed at 70° C. for 12 hours, and then the obtained silicone slurry was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 25 minutes, and redispersed with ethanol. The obtained slurry was subjected to a ball mill using zirconia balls having a diameter of 1.0 mm for 8 hours to obtain a silicon slurry having a particle size (D50) of 321 nm. This was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 60 minutes, and redispersed with water.
（ポリマー被覆工程）
実施例２と同様の方法でポリマー被覆シリコンのスラリーを得た。ポリマー被覆シリコン粒子のＤ５０は４１９ｎｍ、シリコン粒子の平均長径度は２．１、シリコン粒子に対する被覆ポリマーの体積比は５．９、１つのポリマー内に含まれる平均シリコン粒子数は１．１であった。
(Polymer coating process)
A slurry of polymer-coated silicone was obtained in the same manner as in Example 2. The D50 of the polymer-coated silicon particles was 419 nm, the average length of the silicon particles was 2.1, the volume ratio of the coating polymer to the silicon particles was 5.9, and the average number of silicon particles contained in one polymer was 1.1. Ta.
＜実施例７＞
（シリコン粉砕工程）
粒径（Ｄ５０）が７μｍのケミカルグレ－ドの金属シリコン（純度３Ｎ）を水に１７重量％混合し、直径０．３ｍｍのジルコニアビ－ズを用いた微粉砕湿式ビ－ズミルを行い、粒径（Ｄ５０）２９１ｎｍ、乾燥時のＢＥＴ比表面積が８２ｍ２／ｇのシリコンスラリーを得た。
<Example 7>
(Silicon crushing process)
Chemical grade metallic silicon (purity 3N) with a particle size (D50) of 7 μm was mixed with water at 17% by weight, and a wet bead mill using zirconia beads with a diameter of 0.3 mm was carried out to obtain particles. A silicon slurry having a diameter (D50) of 291 nm and a dry BET specific surface area of 82 m 2 /g was obtained.
（シリコン表面改質工程）
上記粉砕シリコンスラリーを固形分量が２０ｇとなるように秤量し、その後、超音波照射を１５分間行い、合計の水量が３３３ｇとなるように追加で水を添加してシリコンスラリーを得た。その後、アンモニウムヒドロキシド０．０３６ｇ、水４ｇを上記シリコンスラリーに添加し、マグネチックスターラーを用いて回転数５００ｒｐｍの条件で１時間撹拌を行った。その後、テトラエトキシシラン（ＴＥＯＳ）４０ｇを上記スラリーに添加した。室温で５時間撹拌を行い、粒径（Ｄ５０）２９０ｎｍのシリコンスラリーを得た。
(Silicon surface modification process)
The above-mentioned pulverized silicone slurry was weighed so that the solid content was 20g, and then ultrasonic irradiation was performed for 15 minutes, and water was additionally added so that the total amount of water was 333g to obtain a silicone slurry. Thereafter, 0.036 g of ammonium hydroxide and 4 g of water were added to the silicon slurry, and stirred for 1 hour at a rotation speed of 500 rpm using a magnetic stirrer. Thereafter, 40 g of tetraethoxysilane (TEOS) was added to the slurry. Stirring was performed at room temperature for 5 hours to obtain a silicon slurry with a particle size (D50) of 290 nm.
（ポリマー被覆工程）
上記スラリーをシリコン固形分量が７．５ｇとなるように秤量して丸底フラスコに移し、合計の水量が６０５ｇとなるように追加で水を添加した。フラスコ系内を窒素パ－ジした後、液温を３５℃に昇温した。その後、ＭＰＳ１．１ｇをフラスコ内に加え、３０分間攪拌した。蒸留したスチレンモノマー４７．２ｇと１０ｇの水に溶解させたＮａＳＳ０．２４ｇを添加し、２時間攪拌した。その後、液温を６２℃に昇温させ、４０ｇの水に溶解させたＡＰＳ１．０ｇをシリンジポンプを用いて４ｃｃ／ｈの速度で添加した。その後、還流下で１０時間加熱撹拌を続けた。得られた反応液を回転数４８００ｒｐｍ、回転時間４５分の条件で遠心分離処理し、沈殿をエタノ－ルで再分散することでポリマー被覆シリコンのスラリーを得た。ポリマー被覆シリコン粒子のＤ５０は３４０ｎｍ、シリコン粒子の平均長径度は２．３、シリコン粒子に対する被覆ポリマーの体積比は５．５、１つのポリマー内に含まれる平均シリコン粒子数は１．４であった。
(Polymer coating process)
The slurry was weighed so that the silicon solid content was 7.5 g, and transferred to a round bottom flask, and additional water was added so that the total amount of water was 605 g. After purging the inside of the flask with nitrogen, the liquid temperature was raised to 35°C. Thereafter, 1.1 g of MPS was added into the flask and stirred for 30 minutes. 47.2 g of distilled styrene monomer and 0.24 g of NaSS dissolved in 10 g of water were added and stirred for 2 hours. Thereafter, the liquid temperature was raised to 62° C., and 1.0 g of APS dissolved in 40 g of water was added at a rate of 4 cc/h using a syringe pump. Thereafter, the mixture was heated and stirred under reflux for 10 hours. The resulting reaction solution was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 45 minutes, and the precipitate was redispersed with ethanol to obtain a slurry of polymer-coated silicone. The D50 of the polymer-coated silicon particles is 340 nm, the average length of the silicon particles is 2.3, the volume ratio of the coating polymer to the silicon particles is 5.5, and the average number of silicon particles contained in one polymer is 1.4. Ta.
＜実施例８＞
（シリコン粉砕工程）
粒径（Ｄ５０）が７μｍのケミカルグレ－ドの金属シリコン（純度３Ｎ）を水に１６重量％混合し、直径０．３ｍｍのジルコニアビ－ズを用いた微粉砕湿式ビ－ズミルを行い、粒径（Ｄ５０）２５５ｎｍ、乾燥時のＢＥＴ比表面積が６８ｍ２／ｇのシリコンスラリーを得た。
<Example 8>
(Silicon crushing process)
Chemical grade metallic silicon (purity 3N) with a particle size (D50) of 7 μm was mixed with water at 16% by weight, and a wet bead mill using zirconia beads with a diameter of 0.3 mm was used to make the particles. A silicon slurry having a diameter (D50) of 255 nm and a BET specific surface area of 68 m 2 /g when dried was obtained.
（シリコン表面改質工程）
実施例７と同様の方法で、粒径（Ｄ５０）２４９ｎｍのシリコンスラリーを得た。これを回転数４８００ｒｐｍ、回転時間６０分の条件で遠心分離処理し、水で再分散した。
(Silicon surface modification process)
A silicon slurry having a particle size (D50) of 249 nm was obtained in the same manner as in Example 7. This was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 60 minutes, and redispersed with water.
（ポリマー被覆工程）
上記スラリーをシリコン固形分量が１６ｇとなるように秤量して丸底フラスコに移し、合計の水量が１３０２ｇとなるように追加で水を添加した。フラスコ系内を窒素パ－ジした後、液温を３５℃に昇温した。その後、ＭＰＳ２．４ｇをフラスコ内に加え、３０分間攪拌した。蒸留したスチレンモノマー１０１ｇと１０ｇの水に溶解させたＮａＳＳ０．５１ｇを添加し、２時間攪拌した。その後、液温を６２℃に昇温させ、８０ｇの水に溶解させたＡＰＳ２．２ｇをシリンジポンプを用いて８ｃｃ／ｈの速度で添加した。その後、還流下で１０時間加熱撹拌を続けた。得られた反応液を回転数４８００ｒｐｍ、回転時間４５分の条件で遠心分離処理し、沈殿をエタノ－ルで再分散することでポリマー被覆シリコンのスラリーを得た。ポリマー被覆シリコン粒子のＤ５０は３１９ｎｍ、シリコン粒子の平均長径度は２．２、シリコン粒子に対する被覆ポリマーの体積比は５．８、１つのポリマー内に含まれる平均シリコン粒子数は１．４であった。
(Polymer coating process)
The slurry was weighed so that the silicon solid content was 16 g and transferred to a round bottom flask, and additional water was added so that the total amount of water was 1302 g. After purging the inside of the flask with nitrogen, the liquid temperature was raised to 35°C. Thereafter, 2.4 g of MPS was added into the flask and stirred for 30 minutes. 101 g of distilled styrene monomer and 0.51 g of NaSS dissolved in 10 g of water were added and stirred for 2 hours. Thereafter, the liquid temperature was raised to 62° C., and 2.2 g of APS dissolved in 80 g of water was added at a rate of 8 cc/h using a syringe pump. Thereafter, the mixture was heated and stirred under reflux for 10 hours. The resulting reaction solution was centrifuged at a rotation speed of 4,800 rpm and a rotation time of 45 minutes, and the precipitate was redispersed with ethanol to obtain a slurry of polymer-coated silicone. The D50 of the polymer-coated silicon particles was 319 nm, the average length of the silicon particles was 2.2, the volume ratio of the coating polymer to the silicon particles was 5.8, and the average number of silicon particles contained in one polymer was 1.4. Ta.
実施例で得られたポリマー被覆シリコン粒子は、シリコンがポリマーで被覆されていることからシリコンの酸化が抑制されている。 In the polymer-coated silicon particles obtained in Examples, oxidation of silicon is suppressed because silicon is coated with a polymer.
＜比較例１＞
比較例１のポリマー被覆していないシリコン粒子としては、実施例１の粉砕シリコンを、ポリマー被覆していないシリコン粒子とした。
<Comparative example 1>
As the silicon particles not coated with a polymer of Comparative Example 1, the crushed silicon of Example 1 was used as silicon particles not coated with a polymer.
この比較例１のポリマー被覆していないシリコン粒子は、ポリマー被覆していないことから、シリコンの酸化が促進されている。 Since the silicon particles of Comparative Example 1 that are not coated with a polymer are not coated with a polymer, oxidation of silicon is promoted.
１ シリコン粒子
２ 被覆ポリマー
1 Silicon particles 2 Coated polymer
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| JP2014075325A (en) | 2012-10-05 | 2014-04-24 | Teijin Ltd | Carbon-coated silicon particle, negative electrode for lithium ion secondary battery, lithium ion secondary battery, and composition for forming negative electrode |
| US20160164081A1 (en) | 2013-07-23 | 2016-06-09 | Jiangsu Huadong Institute Of Li-Ion Battery Co. Ltd. | Method for making lithium ion battery anode active material |
| WO2017140645A1 (en) | 2016-02-17 | 2017-08-24 | Wacker Chemie Ag | Method for producing si/c composite particles |
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| JP2014075325A (en) | 2012-10-05 | 2014-04-24 | Teijin Ltd | Carbon-coated silicon particle, negative electrode for lithium ion secondary battery, lithium ion secondary battery, and composition for forming negative electrode |
| US20160164081A1 (en) | 2013-07-23 | 2016-06-09 | Jiangsu Huadong Institute Of Li-Ion Battery Co. Ltd. | Method for making lithium ion battery anode active material |
| WO2017140645A1 (en) | 2016-02-17 | 2017-08-24 | Wacker Chemie Ag | Method for producing si/c composite particles |
| JP2020507192A (en) | 2017-02-09 | 2020-03-05 | ワッカー ケミー アクチエンゲゼルシャフトＷａｃｋｅｒ Ｃｈｅｍｉｅ ＡＧ | Polymer-grafted silicon particles |
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