CN111876213B - Salt-spray corrosion-resistant additive, lubricating grease, preparation method and application thereof - Google Patents
Salt-spray corrosion-resistant additive, lubricating grease, preparation method and application thereof Download PDFInfo
- Publication number
- CN111876213B CN111876213B CN202010694415.9A CN202010694415A CN111876213B CN 111876213 B CN111876213 B CN 111876213B CN 202010694415 A CN202010694415 A CN 202010694415A CN 111876213 B CN111876213 B CN 111876213B
- Authority
- CN
- China
- Prior art keywords
- polyurea
- graphene quantum
- spray corrosion
- lubricating grease
- corrosion resistant
- 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.)
- Active
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- 239000004519 grease Substances 0.000 title claims abstract description 157
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 133
- 238000005260 corrosion Methods 0.000 title claims abstract description 114
- 230000007797 corrosion Effects 0.000 title claims abstract description 113
- 239000007921 spray Substances 0.000 title claims abstract description 100
- 239000000654 additive Substances 0.000 title claims abstract description 94
- 230000000996 additive effect Effects 0.000 title claims abstract description 83
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 229920002396 Polyurea Polymers 0.000 claims abstract description 124
- 150000003839 salts Chemical class 0.000 claims abstract description 104
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 97
- 238000000034 method Methods 0.000 claims abstract description 49
- 239000002002 slurry Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 17
- 238000005576 amination reaction Methods 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 47
- 239000002096 quantum dot Substances 0.000 claims description 30
- 229910021389 graphene Inorganic materials 0.000 claims description 29
- 239000003921 oil Substances 0.000 claims description 24
- 235000019198 oils Nutrition 0.000 claims description 24
- 239000002199 base oil Substances 0.000 claims description 18
- 239000012948 isocyanate Substances 0.000 claims description 17
- 150000002513 isocyanates Chemical class 0.000 claims description 17
- 150000001412 amines Chemical class 0.000 claims description 16
- 239000012298 atmosphere Substances 0.000 claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 11
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- PAFZNILMFXTMIY-UHFFFAOYSA-N cyclohexylamine Chemical compound NC1CCCCC1 PAFZNILMFXTMIY-UHFFFAOYSA-N 0.000 claims description 8
- 241000446313 Lamella Species 0.000 claims description 7
- 238000010907 mechanical stirring Methods 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 6
- 239000011737 fluorine Substances 0.000 claims description 6
- 229910052731 fluorine Inorganic materials 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- RZXMPPFPUUCRFN-UHFFFAOYSA-N p-toluidine Chemical compound CC1=CC=C(N)C=C1 RZXMPPFPUUCRFN-UHFFFAOYSA-N 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- 239000002562 thickening agent Substances 0.000 claims description 5
- QWDQYHPOSSHSAW-UHFFFAOYSA-N 1-isocyanatooctadecane Chemical compound CCCCCCCCCCCCCCCCCCN=C=O QWDQYHPOSSHSAW-UHFFFAOYSA-N 0.000 claims description 4
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 4
- DGTNSSLYPYDJGL-UHFFFAOYSA-N phenyl isocyanate Chemical compound O=C=NC1=CC=CC=C1 DGTNSSLYPYDJGL-UHFFFAOYSA-N 0.000 claims description 4
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 4
- XMKLTEGSALONPH-UHFFFAOYSA-N 1,2,4,5-tetrazinane-3,6-dione Chemical compound O=C1NNC(=O)NN1 XMKLTEGSALONPH-UHFFFAOYSA-N 0.000 claims description 3
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 claims description 3
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims description 3
- AFBPFSWMIHJQDM-UHFFFAOYSA-N N-methyl-N-phenylamine Natural products CNC1=CC=CC=C1 AFBPFSWMIHJQDM-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 230000032050 esterification Effects 0.000 claims description 3
- 238000005886 esterification reaction Methods 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 229940018564 m-phenylenediamine Drugs 0.000 claims description 3
- 239000002480 mineral oil Substances 0.000 claims description 3
- 235000010446 mineral oil Nutrition 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 3
- 239000008158 vegetable oil Substances 0.000 claims description 3
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- 239000011812 mixed powder Substances 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 239000003595 mist Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 13
- 239000002904 solvent Substances 0.000 description 12
- 239000003795 chemical substances by application Substances 0.000 description 11
- 239000006259 organic additive Substances 0.000 description 10
- 239000000084 colloidal system Substances 0.000 description 9
- 238000004513 sizing Methods 0.000 description 9
- 230000002209 hydrophobic effect Effects 0.000 description 8
- 230000009467 reduction Effects 0.000 description 7
- 239000000843 powder Substances 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- -1 amine salts Chemical class 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 238000003682 fluorination reaction Methods 0.000 description 4
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 4
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 3
- 229920006362 Teflon® Polymers 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 3
- 239000004711 α-olefin Substances 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003115 biocidal effect Effects 0.000 description 2
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 description 2
- 238000007036 catalytic synthesis reaction Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000012990 dithiocarbamate Substances 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 229920013639 polyalphaolefin Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- SHXCHSNZIGEBFL-UHFFFAOYSA-N 1,3-benzothiazole;zinc Chemical compound [Zn].C1=CC=C2SC=NC2=C1 SHXCHSNZIGEBFL-UHFFFAOYSA-N 0.000 description 1
- LLZHXQRNOOAOFF-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione;zinc Chemical compound [Zn].C1=CC=C2NC(S)=NC2=C1 LLZHXQRNOOAOFF-UHFFFAOYSA-N 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- SVYKKECYCPFKGB-UHFFFAOYSA-N N,N-dimethylcyclohexylamine Chemical compound CN(C)C1CCCCC1 SVYKKECYCPFKGB-UHFFFAOYSA-N 0.000 description 1
- HXEZDIMHPOSPHD-UHFFFAOYSA-N NC(=O)N.[Ba] Chemical compound NC(=O)N.[Ba] HXEZDIMHPOSPHD-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- VRMWOQSSFPYAQD-UHFFFAOYSA-N [K].NC(N)=O Chemical compound [K].NC(N)=O VRMWOQSSFPYAQD-UHFFFAOYSA-N 0.000 description 1
- GMRXNXPWWJDYFJ-UHFFFAOYSA-N [Li].NC(N)=O Chemical compound [Li].NC(N)=O GMRXNXPWWJDYFJ-UHFFFAOYSA-N 0.000 description 1
- FRWLNLKLBMLLGN-UHFFFAOYSA-N [Mg].NC(N)=O Chemical compound [Mg].NC(N)=O FRWLNLKLBMLLGN-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- FMNFAXVBAQEWCV-UHFFFAOYSA-N aminooxyboronic acid Chemical class NOB(O)O FMNFAXVBAQEWCV-UHFFFAOYSA-N 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 239000007866 anti-wear additive Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000013556 antirust agent Substances 0.000 description 1
- 239000011805 ball Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- ZMRQTIAUOLVKOX-UHFFFAOYSA-L calcium;diphenoxide Chemical compound [Ca+2].[O-]C1=CC=CC=C1.[O-]C1=CC=CC=C1 ZMRQTIAUOLVKOX-UHFFFAOYSA-L 0.000 description 1
- BTZJQYVYGCCNHY-UHFFFAOYSA-N calcium;urea Chemical compound [Ca].NC(N)=O BTZJQYVYGCCNHY-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000029226 lipidation Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000006078 metal deactivator Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 239000011807 nanoball Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000011858 nanopowder Substances 0.000 description 1
- 125000005609 naphthenate group Chemical group 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- IOQPZZOEVPZRBK-UHFFFAOYSA-N octan-1-amine Chemical compound CCCCCCCCN IOQPZZOEVPZRBK-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- LJRGBERXYNQPJI-UHFFFAOYSA-M sodium;3-nitrobenzenesulfonate Chemical compound [Na+].[O-][N+](=O)C1=CC=CC(S([O-])(=O)=O)=C1 LJRGBERXYNQPJI-UHFFFAOYSA-M 0.000 description 1
- AWLUSOLTCFEHNE-UHFFFAOYSA-N sodium;urea Chemical compound [Na].NC(N)=O AWLUSOLTCFEHNE-UHFFFAOYSA-N 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- RYYWUUFWQRZTIU-UHFFFAOYSA-K thiophosphate Chemical compound [O-]P([O-])([O-])=S RYYWUUFWQRZTIU-UHFFFAOYSA-K 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/02—Carbon; Graphite
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
- C10M2201/042—Carbon; Graphite; Carbon black halogenated, i.e. graphite fluoride
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/0206—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/045—Polyureas; Polyurethanes
- C10M2217/0456—Polyureas; Polyurethanes used as thickening agents
Abstract
The invention discloses a salt spray corrosion resistant additive, lubricating grease, a preparation method and application thereof, and relates to the technical field of chemical materials. The salt spray corrosion resistant additive comprises the following components in parts by weight: 70-90 parts of graphene quantum dots and 10-30 parts of fluorinated graphene quantum dots. The use method of the polyurea grease comprises the following steps: an oiling process, a fatting process and an amination process; and sequentially adding the obtained oiled slurry, lipidated slurry and aminated slurry according to the preparation process of the polyurea lubricating grease to obtain the salt spray corrosion resistant polyurea lubricating grease. The salt spray corrosion resistant additive has good salt spray corrosion resistance, and the prepared salt spray corrosion resistant polyurea-based lubricating grease has excellent high temperature resistance, extreme pressure wear resistance, salt spray corrosion resistance, good mechanical stability and chemical stability, and can prolong the service life of the polyurea-based lubricating grease in the marine environment.
Description
Technical Field
The invention relates to the technical field of chemical materials, in particular to a salt spray corrosion resistant additive, lubricating grease, a preparation method and application thereof.
Background
The polyurea-based lubricating grease is prepared by thickening mineral oil, synthetic oil and vegetable oil by polyurea-based organic compounds and adding a small amount of additives, has good oxidation stability, thermal stability, pumping property, oxidation resistance, mechanical stability, colloid stability and water spraying property, and is particularly suitable for lubricating occasions with high temperature, high load and wide temperature range. As a lubricating grease with comprehensive performance, the polyurea lubricating grease has the advantages of simple and convenient preparation, moderate price, long service life, high dropping point, no toxic and harmful components and easy biodegradation, not only meets the performance requirement of high-temperature lubricating grease, but also realizes the environment-friendly requirement, and is widely applied in various fields. In practical industrial application, in the face of various harsh lubricating working environments, different methods are adopted to improve the physical properties of the lubricating grease so as to meet the use requirements of the lubricating grease. One of the methods is to use additives with different properties to be added into the lubricating grease, and the additives can be divided into extreme pressure antiwear additives, antioxidant additives, thickening additives, antirust additives and the like according to different functions. The additive is used for improving the performance of the lubricating grease, and can provide the lubricating grease with more excellent extreme pressure wear resistance, corrosion resistance, rust resistance, water spray resistance, heat resistance and other performances
At present, the development trend of polyurea-based lubricating grease is to improve the structure of the lubricating grease and increase the dropping point of the lubricating grease, and meanwhile, the use requirements under multipurpose and complex environments need to be met, especially the water leaching loss performance and the salt spray corrosion resistance performance of the polyurea lubricating grease are improved, so that the use performance of the polyurea-based lubricating grease in marine environments is improved. Salt mist is a dispersion system formed in a high-temperature, high-humidity atmosphere of the ocean, and mainly consists of fine liquid droplets containing salt components. These droplets are dispersed in the atmosphere, creating a salt spray. Salt, the most common compound in the world, can cause corrosion and harm to various mechanical equipment and instruments. Sea wave bank beating, sea water disturbance, wind wave breaking and the like are all reasons for salt mist generation, a large amount of bubbles and foams are generated by sea water movement, tiny liquid drops are formed after the bubbles and the foams break, most of the liquid drops fall under the action of gravity, the part which does not fall moves along with airflow, and the salt mist is formed through various processes of mixing, splitting, evaporation and the like. Mechanical equipment and instruments exposed in a salt fog atmosphere environment have three effects: electrical, physical and corrosion effects. Among them, the main influences on mechanical, electrical, and electronic devices are the corrosive effects. The corrosion effect can cause the metal in the mechanical, electrical and electronic equipment to generate chemical reaction, so as to be converted into an ionic state, influence the performances and the service life of the mechanical equipment and instruments and meters, and cause catastrophic accidents by serious people. Therefore, the problems of reliable operation, accurate metering and the like of machinery, electricians and electronic equipment in a salt fog environment are concerned by the lubrication and protection systems of machinery, equipment and instruments of marine transport ships, marine aircrafts, offshore wind power generation, marine oil production platforms and the like, and the lubrication and protection systems of mechanical facilities, equipment and the like of island coastal power plants, ports and the like.
In order to meet the comprehensive performance requirements of high temperature, high humidity and high salt corrosion in marine environment, the salt spray corrosion resistant lubricating grease in China mostly uses aluminum soap-based lubricating grease, but the aluminum soap-based lubricating grease has low use temperature and cannot meet the lubricating and protecting requirements of wide-temperature parts such as marine ship machinery, instruments and meters, and the polyurea-based lubricating grease has wide use temperature range and certain protection effect, and in order to achieve good rust-proof salt spray corrosion resistant effect of the polyurea-based lubricating grease, organic additives (such as rust inhibitors: sulfonates, amines, amine salts, benzotriazole and imidazoline) are required to be added for modification so as to improve the salt spray corrosion resistant performance of the polyurea-based lubricating grease. However, because of the various types of organic additives, the production process is complex, the environment is polluted to a certain extent in the production process, the addition amount of the organic additives in the polyurea lubricating grease is large (about 2-5%), and the organic additives are required to be compounded (compounded) for use in most cases, so that the comprehensive performance of the polyurea lubricating grease is influenced (such as dropping point reduction, low-temperature wear resistance damage, high-temperature wear resistance and friction reduction, lubricating grease consistency and heat stability reduction and the like), and the environment is influenced (such as heavy metals including sulfur, phosphorus, zinc and the like in the organic additives).
Disclosure of Invention
In view of this, the embodiment of the invention provides a salt spray corrosion resistant additive, lubricating grease, a preparation method and an application thereof, and mainly aims to solve the technical problem that polyurea lubricating grease is poor in salt spray corrosion resistance.
In order to achieve the purpose, the invention mainly provides the following technical scheme:
in one aspect, an embodiment of the present invention provides a salt spray corrosion resistant additive, which includes the following components in parts by weight:
70-90 parts of graphene quantum dots,
10-30 parts of fluorinated graphene quantum dots.
Preferably, the lamellar diameter of the graphene quantum dot is less than 50 nanometers, and the mass percentage of lamellar particles with the lamellar diameter of less than 20 nanometers is more than or equal to 80%; the thickness of the sheet layer of the graphene quantum dot is less than 9, wherein the mass percentage of the sheet grains of the sheet layer with thickness less than 6 is more than or equal to 80%.
Preferably, the carbon content of the graphene quantum dots is greater than or equal to 95%, the graphene quantum dots contain N, H, O gas elements and S elements, the total content of the gas elements and the S elements is less than 5%, and the sum of the carbon content of the graphene quantum dots, the gas elements and the sulfur elements is 100%.
The method for preparing the graphene quantum dots comprises a physical method and a chemical method, and no matter which method is adopted, the method only needs to meet the selection requirements of the graphene quantum dots.
Preferably, the diameter of a lamella of the fluorinated graphene quantum dot is less than 50 nanometers, and the mass percentage of the lamella particles with the lamella diameter less than 20 nanometers is more than or equal to 80%; the thickness of the sheet layer of the fluorinated graphene quantum dot is less than 9, wherein the mass percentage of the sheet particles of the sheet layer with thickness less than 6 is more than or equal to 80%.
Preferably, the fluorinated graphene quantum dots contain 20% to 50% of fluorine, 79% to 49% of carbon, and the total content of the fluorine and the carbon is 99% or more.
The preparation method comprises the following steps: the fluorinated graphene quantum dots can be prepared by performing fluorination treatment on the graphene quantum dots prepared by the method, wherein the fluorination treatment comprises a chemical synthesis method, a catalytic synthesis method and an electrolytic method, and any method can be adopted as long as the requirements of the fluorinated graphene quantum dots are met.
In another aspect, an embodiment of the present invention provides a preparation method of the above salt spray corrosion resistant additive, including the following steps: preparing graphene quantum dots and fluorinated graphene quantum dots according to the material ratio; and under the argon protection atmosphere, stirring and mixing the graphene quantum dots and the fluorinated graphene quantum dots by adopting a mechanical stirring and grinding machine to obtain mixed powder, namely the polyurea-based lubricating grease additive.
Preferably, the rotation speed of the mechanical stirring and grinding machine is 50-100 r/min, the stirring and grinding time is 0.5-1 h,
in yet another aspect, embodiments of the present invention further provide a polyurea-based grease, which includes a base oil, an isocyanate, an organic amine, a conventional additive, and a special additive; the special additive is the salt spray corrosion resistant additive.
Preferably, the total amount of the base oil, the isocyanate, the organic amine and the conventional additive is 97-99.8 parts by weight, and the salt-spray corrosion resistant additive is 0.2-3 parts by weight.
The isocyanate and the organic amine can be prepared into thickening agents of various polyurea grease, and the thickening agents comprise diurea grease, triurea grease, tetraurea grease, hexaurea grease, octaurea grease and composite polyurea grease; the base oil is synthetic oil, mineral oil or vegetable oil.
In another aspect, an embodiment of the present invention further provides a preparation method of the above polyurea-based grease, where the method includes:
(1) dividing the total amount of the salt-fog corrosion resistant additive into three parts, wherein the first part is 20-40% of the total amount, the second part is 30-40% of the total amount, and the third part is 30-40% (by weight);
(2) an oiling process: weighing various raw materials according to the formula of the polyurea lubricating grease; dividing part or all of the base oil into three parts, namely A part, B part and C part, as required; adding the first part of the salt spray corrosion resistant additive into the A part of the base oil, mechanically stirring for 10-20 minutes at room temperature (25 ℃), and then performing ultrasonic dispersion for 30-60 minutes to obtain oiled slurry of the salt spray corrosion resistant additive;
(3) and (3) an esterification process: adding a second part of salt-spray corrosion resistant additive into the mixture of the isocyanate and the B part of base oil, and mechanically stirring for 30-60 minutes under microwave irradiation at the temperature of 30-50 ℃ to obtain lipidated slurry of the salt-spray corrosion resistant additive; wherein the isocyanate is at least one of tolyl diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, octadecyl isocyanate and phenyl isocyanate;
(4) and (3) amination: adding a third salt spray corrosion resistant additive into a mixture of organic amine and the base oil C, mechanically stirring for 30-60 minutes under microwave irradiation, and controlling the temperature to be 30-50 ℃ to obtain aminated slurry of the salt spray corrosion resistant additive; wherein the organic amine is at least one of aliphatic amine, cyclohexylamine, p-toluidine, ethylenediamine, hexamethylenediamine, p-phenylenediamine and m-phenylenediamine;
(5) and sequentially adding the oiled slurry, the lipidated slurry and the aminated slurry into corresponding working procedures according to the material proportion and the preparation method of the polyurea-based lubricating grease to obtain the polyurea-based lubricating grease.
The oiling process, the fatting process and the amination process in the method are used for enhancing the affinity of the salt spray corrosion resistant additive and the polyurea lubricating grease, and the salt spray corrosion resistant capability of the polyurea lubricating grease can be greatly improved.
According to the invention, the salt spray corrosion resistant additive and the base oil are subjected to mechanical stirring and ultrasonic dispersion treatment to obtain the oiled slurry of the salt spray corrosion resistant additive, so that the salt spray corrosion resistant additive is favorably fused and dispersed in the polyurea lubricating grease, and the better salt spray corrosion resistance is exerted.
According to the invention, the salt spray corrosion resistant additive and the oil solution of isocyanate are treated by microwave irradiation and mechanical stirring to obtain the lipidated slurry of the salt spray corrosion resistant additive, so that the salt spray corrosion resistant additive can be lipidated and modified, the fusion and dispersion of the salt spray corrosion resistant additive in the polyurea lubricating grease are facilitated, and the better salt spray corrosion resistant performance is exerted.
According to the invention, the salt spray corrosion resistant additive and the organic amine oil solution are treated by microwave irradiation and mechanical stirring to obtain the aminated slurry of the salt spray corrosion resistant additive, so that the salt spray corrosion resistant additive can be aminated and modified, the fusion and dispersion of graphene quantum dots in polyurea lubricating grease are facilitated, and the better salt spray corrosion resistance performance is exerted.
The using method comprises the following steps: the prepared oiled sizing agent, lipidated sizing agent and aminated sizing agent are calibrated, and the weight parts of the base oil, the isocyanate and the organic amine and the proportion of the salt spray corrosion resistant additive are sequentially added into the working procedure according to the proportion of the raw materials required by the polyurea lubricating grease.
Specifically, the addition modes of the oiled sizing agent, the lipidated sizing agent and the aminated sizing agent are as follows:
(1) the polyurea-based lubricating grease is not added in batches and is completely added at one time, namely, the polyurea-based lubricating grease and other related materials are sequentially and completely added according to the proportion when the preparation process of the polyurea-based lubricating grease is started;
(2) adding the materials in batches and stages, namely reserving 1/5-1/3 of oiled slurry, lipidated slurry and aminated slurry and other related materials in batches and stages.
The material proportion and the preparation method of the polyurea-based lubricating grease can adopt the conventional method in the field, which is the prior art. One of the innovation points of the invention is the addition proportion of the salt spray corrosion resistant additive in the polyurea-based lubricating grease and the special use method of the salt spray corrosion resistant additive in the preparation of the polyurea-based lubricating grease.
The polyurea-based lubricating grease prepared by adopting the salt spray corrosion resistant additive has the following properties: (1) the salt spray resistance and the damp and heat resistance are good; (2) the high-temperature-resistant and oxidation-resistant rubber has excellent high-temperature resistance and oxidation resistance, and can prolong the high-temperature service life; (3) the lubricating oil has excellent extreme pressure wear resistance and adhesiveness, low friction coefficient and strong bearing capacity; (4) excellent mechanical stability and chemical stability, water vapor resistance and weak acid and alkali corrosion resistance; (5) has the performance of resisting water spray and water scouring, and can prevent rust and resist corrosion in severe environment.
In another aspect, the embodiment of the invention provides an application of graphene quantum dots as a salt spray corrosion resistant additive in polyurea-based grease.
The terms used in the present invention are explained below:
the graphene quantum dots are used as a novel carbon nano-scale powder additive, have excellent mechanical, thermal, electrical, flame retardant and chemical stability (acid-base-salt corrosion resistance) and good self-lubricating characteristics due to the special crystal structure, and can easily enter a friction contact surface due to the ultrathin layered structure, so that friction shear stress is borne, and direct contact on the surface of a friction object is reduced. In the field, no people find that the graphene quantum dots can achieve very excellent marine salt fog resistant effect when being added into the polyurea-based lubricant as the additive, and the invention finds that the graphene quantum dots can show good salt fog resistant atmosphere, antifriction and wear resistant performance, rust prevention, corrosion resistance, antibiosis, flame retardation and heat conduction and static conduction performance when being used as the additive of the polyurea-based lubricating grease.
In the nano graphene powder material, the graphene quantum dots have various unique effects such as quantum size effect, surface effect, tunnel effect and the like, so that the nano graphene powder material has various excellent performances such as friction resistance, wear resistance, self-lubricating property, corrosion resistance, hydrophobic property, flame retardant property, antibacterial property, heat conduction and electric conductivity and the like. The graphene quantum dots are uniformly dispersed in the polyurea-based lubricating grease, can be lubricated between friction pairs in a micro-bearing mode, and can be filled into pits formed by friction to repair the friction surface, so that the lubricating performance of the polyurea-based lubricating grease is protected and enhanced, and the graphene quantum dots become a good long-acting lubricating additive of the polyurea-based lubricating grease; the invention discovers that the hydrophobicity of the graphene quantum dots can form a gas barrier layer on the surface of the polyurea lubricating grease, and the gas barrier layer can block the corrosion of a salt fog atmosphere and resist the corrosion of moisture, so that the graphene quantum dots become a good salt fog corrosion resistant additive of the polyurea lubricating grease.
The invention discloses a graphene quantum dot belonging to a nano powder lubricant, which has good lipophilicity and salt spray corrosion resistance, and can form a good salt spray atmosphere barrier with polyurea grease without affecting the colloid structure of the polyurea grease under a certain addition amount. Because the graphite powder material belongs to a micron-sized material, the graphite powder material has thick sheets and large addition amount in the lubricating grease, the thickening capability of the lubricating grease is poor, the appearance is rough, and the salt spray corrosion resistance of the polyurea lubricating grease is influenced.
The graphene quantum dots have excellent chemical stability, lubricity, hydrophobicity and lipophilicity, and can resist acid, alkali and salt corrosion, and the lamellar structure of the graphene quantum dots and the polyurea lubricating grease can form a compact colloidal hydrophobic barrier to prevent the intrusion of a salt mist atmosphere, so that the graphene quantum dots are an excellent salt mist corrosion resistant additive for the polyurea lubricating grease. In addition, the graphene quantum dots have the advantages of high temperature resistance, low temperature resistance, excellent mechanical property and heat conduction and electric conductivity, excellent performance under special conditions of high speed, heavy load, high temperature, low temperature, radiation, flame retardance, corrosion resistance, shock absorption, noise reduction and the like, and are very suitable for lubrication and protection of machinery, equipment and instruments. In addition, the graphene can better exert good lubricity under the condition of water vapor. Under the condition that water and air exist, the hydrophobicity of the graphene can reduce the adsorption of the surfaces of the polyurea lubricating grease on water vapor and air molecules, the bonding force of the internal structure of the polyurea-based lubricating grease is enhanced, particularly, the polyurea lubricating grease is resistant to the damage and corrosion of salt-containing mist water vapor and salt-containing mist air to the structure of the polyurea lubricating grease, and the service performance of the polyurea-based lubricating grease in the marine environment is improved. As the graphene quantum dots belong to a nano-grade material and are thin in lamella, although the addition amount of the graphene quantum dots in the polyurea-based lubricating grease is small (the addition total amount is 0.2-3% of the total amount of the polyurea-based lubricating grease material), the performance is outstanding, and other performances of the polyurea-based lubricating grease cannot be influenced.
Although the polyurea-based lubricating grease has good corrosion resistance and water resistance, and in a water spraying test, the polyurea-based lubricating grease has excellent water spraying resistance, the water spraying loss rate is only 0.7% (lithium-based 6.4, lithium complex 8.73, aluminum complex 3.77 and bentonite 4.9, the values of which are far better than those of other lubricating greases), and the water spraying performance in saline water is very good. However, in marine environments, the salt spray resistance of polyurea grease is poor (which is a common problem of grease), and the salt spray resistance for a long time (more than 30 days) is insufficient, and needs to be improved. The compound graphene quantum dot salt-spray-resistant corrosion additive mainly comprising the graphene quantum dots and a certain amount of fluorinated graphene quantum dots has good salt-spray-resistant performance and the function of blocking a salt-spray atmosphere, can form a compact hydrophobic salt-spray-resistant colloid with polyurea lubricating grease, and improves the salt-spray-resistant performance of the polyurea lubricating grease.
Polyurea-based greases have relatively poor shear stability, are generally severely softened at low shear rates, and a decrease in penetration causes leakage and loss of the grease in the bearing, rendering the lubrication ineffective, and therefore, the polyurea-based greases have poor shear stability, sometimes limiting their applications. The graphene quantum dot additive has extremely high mechanical strength and toughness and excellent lubrication antifriction property, and a compact colloid formed by the graphene quantum dot additive and polyurea lubricating grease can improve the shear stability of the polyurea lubricating grease, overcome the defect that the polyurea lubricating grease is seriously softened at a low shear rate, improve the penetration of the polyurea lubricating grease, avoid the leakage and loss of the lubricating grease, realize the long-acting property of the lubricating grease, and further enhance the salt spray corrosion resistance of the polyurea lubricating grease.
According to the invention, a certain amount of compound graphene quantum dots are added into the polyurea-based lubricating grease, so that the salt spray corrosion resistance of the polyurea-based lubricating grease can be improved, and the weather resistance, acid-base corrosion resistance, extreme pressure resistance, high temperature resistance, low temperature resistance and light aging resistance of the polyurea-based lubricating grease can be improved.
The polyurea-based lubricating grease is a colloid dispersion system formed by dispersing a thickening agent into base oil and compounding an additive, and the uniformly dispersed graphene quantum dots and the polyurea-based lubricating grease can form a colloid hydrophobic insulator to play a role in preventing salt mist atmosphere from immersing and corroding. The graphene quantum dots are added into the polyurea lubricating grease, and the sheet structure of the graphene quantum dots can form a hydrophobic barrier layer on the surface of the polyurea lubricating grease, so that the water-spraying resistance and the salt-fog resistance are improved, and the service life of the polyurea lubricating grease is prolonged.
The graphene quantum dot salt mist corrosion-resistant polyurea-based lubricating grease has the characteristics of wear resistance, long acting, salt mist resistance, high and low temperature resistance, flame retardance, noise reduction, no toxicity, environmental friendliness and multiple purposes, and is suitable for lubricating and protecting systems of machines, equipment and instruments such as marine transport ships, marine aircrafts, offshore wind power and marine oil production platforms, and lubricating and protecting systems of mechanical facilities and equipment such as coastal island power plants and ports.
The graphene quantum dot salt-spray corrosion-resistant additive researched by the invention can be suitable for polyurea-based greases, including polyurea-based greases such as diurea grease, triurea grease, tetraurea grease, hexaurea grease, octaurea grease and composite polyurea-based greases (lithium-urea complex, sodium-urea complex, potassium-urea complex, magnesium-urea complex, calcium-urea complex and barium-urea complex).
The additives of the polyurea-based grease are various, such as an antioxidant, a rust inhibitor, an extreme pressure anti-wear agent, a metal deactivator, an adhesive agent, and the like, but are generally classified into organic additives and inorganic additives. The graphene quantum dot salt spray corrosion-resistant additive researched by the invention can replace a part of polyurea grease-related extreme pressure antiwear agents (such as dialkyl dithiocarbamate, thiophosphate, borate, molybdenum disulfide, dithiocarbamate, graphite and dialkyl dithiophosphate), antirust agents (such as amino borate compounds, sulfonate, calcium phenate, naphthenate, succinic acid or derivatives thereof, zinc benzothiazole, zinc mercaptobenzimidazole and sorbitol ester) and other organic additives, and has good compatibility with the organic additives. The invention finds that the graphene quantum dots are high-purity two-dimensional micro-sheet carbon materials, have extremely low ash content and extremely low content of metal and other impurities, and have excellent performance on salt spray corrosion resistance. Currently, the additives of polyurea-based greases are divided into inorganic additives and organic additives. The high-temperature performance and the extreme pressure performance of the inorganic additive are good, but the fatal defects are that the ash content is high, the decomposition is caused at high temperature, and the polyurea-based lubricating grease is easy to lose efficacy; the organic additive needs to select the additive with good high temperature resistance and oxidation resistance, not only is the preparation complex, but also other properties of the polyurea lubricating grease can be reduced, and the salt spray corrosion resistance is insufficient.
The graphene quantum dots have good wear resistance, lubricity, hydrophobicity, lipophilicity, thermal conductivity, chemical inertness and low toxicity. The graphene quantum dots are novel two-dimensional inorganic carbon nano materials, the sheet diameter size is less than 100nm, and the thickness is within 10 layers. Because the electronic motion of the graphene quantum dots is restricted in a three-dimensional space, the quantum confinement effect and the sideband effect are more obvious, and the boundary active dots are increased and are easy to disperse and combine in the polyurea-based lubricating grease. The uniformly dispersed graphene quantum dots can form a colloid hydrophobic insulator with polyurea-based lubricating grease, and play a role in preventing salt mist atmosphere from immersing and corroding.
The graphene is formed by sp carbon atoms2The two-dimensional material formed by the hybridized and connected honeycomb-shaped monoatomic layers has super-strong conductivity, super-high specific surface area, excellent chemical stability and thermal stability, especially the super-hydrophobicity and the anti-permeability of the surfaces of the graphene quantum dots, and provides possibility for the graphene quantum dots to resist salt spray corrosion. The near-zero-dimensional structure of the graphene quantum dots is like a nano ball, so that the salt mist atmosphere is blocked, the frictional resistance of the lubricating grease can be reduced, and the excellent toughness, wear resistance, heat conduction and flame retardance of the graphene quantum dots enable the graphene quantum dots to be a good salt mist corrosion resistant additive of the polyurea lubricating grease.
The graphene quantum dot salt-spray corrosion-resistant additive is nontoxic, and can greatly reduce the pollution of the salt-spray corrosion-resistant polyurea-based lubricating grease to the environment in the production and use processes. In addition, the graphene quantum dot salt-fog-corrosion-resistant additive also has the characteristics of flame retardance, antibiosis, shock absorption and noise reduction, and belongs to a polyurea-based lubricating grease additive with extremely high safety.
The fluorinated graphene adopted by the invention can be called Teflon in a two-dimensional material because the chemical property of the fluorinated graphene is similar to that of polytetrafluoroethylene, the chemical and physical properties of the fluorinated graphene are very stable, and the fluorinated graphene has the corrosion resistance of acid resistance and alkali resistance, and has good lubricity and certain high temperature resistance. This also allows fluorinated graphene to be used as a thinner and lighter teflon substitute, and can be used in any location where it is desirable to have thin dimensions, high strength, stable physical properties, stable chemical properties, and high temperature resistance. The fluorinated graphene serving as a novel derivative of graphene not only maintains the high-strength performance of graphene, but also brings novel interface and physicochemical properties such as surface energy reduction, hydrophobicity enhancement, band gap broadening and the like due to the introduction of fluorine atoms. Meanwhile, the fluorinated graphene is high-temperature resistant, stable in chemical property, similar to polytetrafluoroethylene in property, and called as two-dimensional Teflon. According to the invention, the fluorinated graphene quantum dots are added into the graphene quantum dots in a certain proportion, so that the respective advantages of the graphene quantum dots and the fluorinated graphene quantum dots can be fully exerted, the polyurea-based lubricating grease can be better combined, and the salt spray corrosion resistance of the polyurea-based lubricating grease can be improved.
Compared with the prior art, the salt spray resistant additive of the graphene quantum dots has the advantages that:
(1) the graphene quantum dots have extremely small sheet diameter size and extremely large specific surface area, so that the salt spray corrosion resistance of the polyurea lubricating grease can be fully exerted under the condition of small addition amount.
(2) Under high-speed friction and sliding, the graphene quantum dots with extremely small particle sizes are added into the polyurea-based lubricating grease, so that the lubricating property and extreme pressure abrasion resistance of the polyurea-based lubricating grease can be improved, the service life of the polyurea-based lubricating grease is prolonged, and the salt spray corrosion resistance of the polyurea-based lubricating grease is improved on the premise of ensuring the structural integrity of the polyurea-based lubricating grease.
(3) The graphene quantum dots can play a good lubricating effect under high-temperature and extreme-pressure conditions, and have hydrophobic, heat-conducting and corrosion-resistant properties, so that the salt spray corrosion resistance of the polyurea-based lubricating grease is enhanced.
(4) The graphene quantum dots are uniformly dispersed in the polyurea-based lubricating grease, so that a good colloid hydrophobic structure can be formed, and the salt mist-containing water vapor in the atmosphere can be prevented from entering, so that the salt mist corrosion resistance of the polyurea-based lubricating grease is improved.
Detailed Description
To further illustrate the techniques and methods employed to achieve the intended objects of the invention, the following detailed description of the preferred embodiments, solutions, features, and efficiencies in accordance with the present application are described. The particular features, structures, or characteristics may be combined in any suitable manner in the embodiments or embodiments described below.
Examples
The preparation method of the graphene quantum dot salt-spray corrosion resistant additive comprises the following steps:
(1) selecting graphene quantum dots meeting the technical requirements: the sheet particle of the graphene quantum dot with the sheet diameter size smaller than 20 nanometers accounts for more than 80%, and the maximum sheet diameter size is not more than 100 nanometers; the graphene quantum dots are more than 80% of the sheet particles with the thickness of less than 2 nanometers (the theoretical layer number is less than 6), and the maximum thickness is not more than 3 nanometers (the theoretical layer number is less than 9); the carbon content of the graphene is more than 95%, the graphene contains N, H, O and other gas elements, the total content of the gas elements is less than 5%, but the sum of the carbon content and the gas elements is 100% (the method for preparing the graphene quantum dot is generally divided into a physical method and a chemical method, and whatever method is adopted, so long as the requirements of the graphene quantum dot of the invention are met).
(2) Selecting fluorinated graphene quantum dots meeting the technical requirements: the flake grain of the fluorinated graphene quantum dot with the flake diameter size smaller than 20 nanometers accounts for more than 80%, and the maximum flake diameter size is not more than 100 nanometers; the thickness of the fluorinated graphene quantum dots is less than 2 nanometers, the number of the sheet particles is more than 80% (the theoretical number of layers is less than 6), and the maximum thickness is not more than 3 nanometers (the theoretical number of layers is less than 9); the fluorine content of the fluorinated graphene quantum dot is 20-50%, the carbon content is 79-49%, and the sum of the fluorine content and the carbon content is more than 99% (the fluorinated graphene quantum dot can be prepared by performing fluorination treatment on the graphene quantum dot prepared by the method, and the fluorination treatment is divided into a chemical synthesis method, a catalytic synthesis method and an electrolytic method, and any method can be adopted as long as the requirements of the fluorinated graphene quantum dot are met).
(3) Proportioning: 70-90 parts of graphene quantum dots and 10-30 parts of fluorinated graphene quantum dots;
(4) and mixing the graphene quantum dots and the fluorinated graphene quantum dots by adopting a mechanical stirring grinder under the argon protective atmosphere, wherein the mixing speed is 50-100 r/min, and the mixing time is 0.5-1 h, so that a powder mixture which mainly comprises the graphene quantum dots and contains a certain amount of fluorinated graphene quantum dots is obtained, namely the salt spray corrosion resistant additive.
The total weight of the raw materials of the urea-based dimer grease comprises 97-99.8 parts of alpha-olefin synthetic oil (PAO) base oil, MDI (diphenylmethane diisocyanate), octadecylamine, related additives and the like; the total addition amount of the salt spray corrosion resistant additive is 0.2-3 parts.
Specifically, the total adding amount of the salt spray corrosion resistant additive is divided into three parts, and 20-40%, 30-40% and 30-40% of the total adding amount of the salt spray corrosion resistant additive are respectively added in the oiling process, the lipidation process and the amination process.
(5) An oiling process: selecting poly alpha-olefin synthetic oil (PAO) as a solvent oil dispersed graphene quantum dot powder mixture; firstly, dividing poly-alpha-olefin synthetic oil (PAO) serving as solvent oil into three parts, taking one part, adding 20-40% of the total amount of the salt spray corrosion resistant additive (the part of the solvent oil can be adjusted according to the viscosity and the requirement of the solvent oil), mechanically stirring for 10 minutes at the temperature of 30 ℃, and rotating at 1000 r/min; then ultrasonic dispersion is carried out for 60 minutes to 120 minutes. And (3) after the ultrasonic wave is dispersed, obtaining the solvent oil containing the graphene quantum dot powder mixture, namely the oiled slurry.
(6) And (3) an esterification process: and taking a part of alpha-olefin synthetic oil (PAO) as solvent oil, adding MDI (diphenylmethane diisocyanate) (single isocyanate or a mixture of more than one isocyanate can also be added), adding 30-40% of the total amount of the salt spray corrosion resistant additive (the share of the solvent oil can be adjusted according to the viscosity and the requirement of the solvent oil), mechanically stirring for 10 minutes under the irradiation of a microwave oven (with the power of 10KW), controlling the temperature to be 30-50 ℃, and then cooling and discharging to obtain the lipidated slurry.
The types of isocyanates are mainly: TDI (tolylene diisocyanate), MDI (diphenylmethane diisocyanate), HDI (hexamethylene diisocyanate), octadecyl isocyanate (ODI), Phenyl Isocyanate (PI), etc., but MDI and TDI are most commonly used. One or more isocyanates can be selected to be compounded according to the requirement.
(7) And (3) amination: taking the last part of alpha-olefin synthetic oil (PAO) as solvent oil, adding octadecylamine, adding 30-40% of the total amount of the salt spray corrosion resistant additive (the part of the solvent oil can be adjusted according to the viscosity and the requirement of the solvent oil), mechanically stirring for 10 minutes under the irradiation of a microwave oven (with the power of 10KW), controlling the temperature to be 30-50 ℃, and then cooling and discharging to obtain the aminated slurry.
The organic amines are of the types: (1) monoamines: aliphatic amines (n-octylamine, dodecylamine, octadecylamine), cyclohexylamine (cyclohexylamine, cyclohexyldimethylamine), p-toluidine; (2) diamine (b): ethylenediamine, hexamethylenediamine, p-phenylenediamine, and m-phenylenediamine. One or more organic amines can be selected according to the requirement for compounding.
The using method comprises the following steps: the prepared oiled sizing agent, lipidated sizing agent and aminated sizing agent are calibrated to the weight parts of solvent oil, isocyanate and organic amine, and the components are added into the preparation process according to the mixture amount of the raw materials required by the polyurea lubricating grease in sequence.
The specific addition mode comprises the following steps:
(1) adding all the components in one time without dividing into batches: the preparation method comprises the steps of adding oiled slurry, lipidated slurry and aminated slurry into other materials at one time according to the proportion at the beginning of the preparation process;
(2) adding in batches and stages: namely, leaving 1/5-1/3 of oiled slurry, lipidated slurry and aminated slurry to be added with other materials before the refining stage.
The invention discovers that the compound graphene quantum dot salt spray corrosion resistant additive as the polyurea-based lubricating grease salt spray corrosion resistant additive has the following advantages:
(1) the graphene quantum dots have strong dispersion capacity and self-diffusion capacity in the polyurea lubricating grease, and easily form salt-spray corrosion resistant colloid dispersoids with the polyurea lubricating grease, so that the salt-spray corrosion resistant effect is achieved;
(2) the graphene quantum dots have the characteristic of extremely small particle size, are approximately spherical in appearance, can roll between friction pairs, and play a role similar to a ball bearing, the friction form is changed from sliding friction to rolling friction, the friction coefficient is reduced, the structure of the polyurea lubricating grease is protected from being damaged, and the salt spray corrosion resistance of the polyurea lubricating grease is enhanced;
(3) the graphene quantum dots can repair and strengthen the friction surface and support external load, so that the bearing capacity is improved, the wear and consumption of polyurea-based lubricating grease are reduced, the service life of the polyurea-based lubricating grease is prolonged, and the salt spray corrosion resistance of the polyurea-based lubricating grease is enhanced;
(4) the graphene quantum dots can improve the heat-conducting property of the polyurea-based lubricating grease and protect the polyurea-based lubricating grease from being damaged and failed at high temperature, so that the salt spray resistance of the polyurea-based lubricating grease is improved.
The embodiments of the present invention are not exhaustive, and those skilled in the art can select them from the prior art.
The above disclosure is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and shall be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the above claims.
Claims (3)
1. A polyurea-based grease, which comprises base oil, isocyanate, organic amine, a conventional additive and a special additive; the salt spray corrosion resistant additive is characterized by being a salt spray corrosion resistant additive, and comprising the following components in parts by weight:
70-90 parts of graphene quantum dots,
10-30 parts of fluorinated graphene quantum dots;
the lamellar diameter of the graphene quantum dot is less than 50 nanometers, and the mass percentage of lamellar particles with the lamellar diameter less than 20 nanometers is more than or equal to 80%; the thickness of the sheet layer of the graphene quantum dot is less than 9, wherein the mass percentage of the sheet particles of the sheet layer with thickness less than 6 is more than or equal to 80%;
the carbon content of the graphene quantum dots is greater than or equal to 95%, the graphene quantum dots contain N, H, O gas elements and S elements, the total content of the gas elements and the S elements is less than 5%, and the sum of the carbon content of the graphene quantum dots, the gas elements and the sulfur elements is 100%;
the lamella diameter of the fluorinated graphene quantum dot is less than 50 nanometers, and the mass percentage of the lamella particles with the lamella diameter less than 20 nanometers is more than or equal to 80%; the thickness of the sheet layer of the fluorinated graphene quantum dot is less than 9, wherein the mass percentage of the sheet particles of the sheet layer with thickness less than 6 is more than or equal to 80%;
the content of fluorine element in the fluorinated graphene quantum dot is 20-50%, the content of carbon element is 79-49%, and the total content of the fluorine element and the carbon element is more than 99%;
the preparation method of the salt spray corrosion resistant additive comprises the following steps:
preparing graphene quantum dots and fluorinated graphene quantum dots according to the material ratio;
and under the argon protective atmosphere, stirring and mixing the graphene quantum dots and the fluorinated graphene quantum dots by adopting a mechanical stirring and grinding machine to obtain mixed powder, thus obtaining the salt spray corrosion resistant additive.
2. The polyurea-based grease of claim 1 wherein the total amount of the base oil, isocyanate, organic amine and conventional additives is 97 to 99.8 parts by weight, and the salt spray corrosion resistant additive is 0.2 to 3 parts by weight;
the isocyanate and the organic amine are blended to prepare a plurality of thickening agents of polyurea grease, and the thickening agents comprise diurea grease, triurea grease, tetraurea grease, hexaurea grease, octaurea grease and composite polyurea grease; the base oil is synthetic oil, mineral oil or vegetable oil.
3. The method of preparing the polyurea-based grease of claim 1 or 2, wherein the method comprises:
(1) dividing the total amount of the salt-fog corrosion resistant additive into three parts, wherein the first part is 20-40% of the total amount, the second part is 30-40% of the total amount, and the third part is 30-40% of the total amount;
(2) an oiling process: weighing various raw materials according to the formula of the polyurea lubricating grease; dividing the whole base oil into three parts, namely A part, B part and C part; adding the first part of the salt spray corrosion resistant additive into the A part of the base oil, mechanically stirring at room temperature, and then performing ultrasonic dispersion to obtain oiled slurry of the salt spray corrosion resistant additive;
(3) and (3) an esterification process: adding a second part of salt-spray corrosion resistant additive into the mixture of the isocyanate and the B part of base oil, and mechanically stirring under microwave irradiation at the temperature of 30-50 ℃ to obtain lipidated slurry of the salt-spray corrosion resistant additive; wherein the isocyanate is at least one of tolyl diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, octadecyl isocyanate and phenyl isocyanate;
(4) and (3) amination: adding the third salt spray corrosion resistant additive into the mixture of organic amine and C base oil, mechanically stirring under microwave irradiation, and controlling the temperature to be 30-50 ℃ to obtain aminated slurry of the salt spray corrosion resistant additive; wherein the organic amine is at least one of aliphatic amine, cyclohexylamine, p-toluidine, p-phenylenediamine and m-phenylenediamine;
(5) and sequentially adding the oiled slurry, the lipidated slurry and the aminated slurry into corresponding working procedures according to the material proportion and the preparation method of the polyurea-based lubricating grease to obtain the polyurea-based lubricating grease.
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