CN115594913B - Polypropylene composite material for high-strength non-woven fabric and preparation method thereof - Google Patents
Polypropylene composite material for high-strength non-woven fabric and preparation method thereof Download PDFInfo
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- CN115594913B CN115594913B CN202211108635.4A CN202211108635A CN115594913B CN 115594913 B CN115594913 B CN 115594913B CN 202211108635 A CN202211108635 A CN 202211108635A CN 115594913 B CN115594913 B CN 115594913B
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- illite
- polypropylene
- potassium titanate
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- -1 Polypropylene Polymers 0.000 title claims abstract description 113
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 104
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 104
- 239000002131 composite material Substances 0.000 title claims abstract description 58
- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical class [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 claims abstract description 62
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical class [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000001914 filtration Methods 0.000 claims abstract description 23
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 235000019359 magnesium stearate Nutrition 0.000 claims abstract description 11
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 7
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 7
- 239000002667 nucleating agent Substances 0.000 claims abstract description 7
- 239000004677 Nylon Substances 0.000 claims abstract description 6
- 229920001778 nylon Polymers 0.000 claims abstract description 6
- 229910052900 illite Inorganic materials 0.000 claims description 39
- 238000001035 drying Methods 0.000 claims description 36
- 238000006243 chemical reaction Methods 0.000 claims description 35
- 238000002156 mixing Methods 0.000 claims description 34
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 21
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 claims description 20
- 238000005406 washing Methods 0.000 claims description 18
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 18
- 238000000498 ball milling Methods 0.000 claims description 17
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 16
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 16
- 238000002791 soaking Methods 0.000 claims description 16
- 238000001354 calcination Methods 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 14
- 239000011701 zinc Substances 0.000 claims description 14
- 229910052725 zinc Inorganic materials 0.000 claims description 14
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 claims description 12
- 229920000299 Nylon 12 Polymers 0.000 claims description 12
- 239000008367 deionised water Substances 0.000 claims description 12
- 229910021641 deionized water Inorganic materials 0.000 claims description 12
- 238000000227 grinding Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 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 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 230000035484 reaction time Effects 0.000 claims description 10
- SFVFIFLLYFPGHH-UHFFFAOYSA-M stearalkonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 SFVFIFLLYFPGHH-UHFFFAOYSA-M 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- MXLBKVCGLRNKBW-UHFFFAOYSA-N C(=C)OO[Si](C(C)(C)C)(C(C)(C)C)C(C)(C)C Chemical compound C(=C)OO[Si](C(C)(C)C)(C(C)(C)C)C(C)(C)C MXLBKVCGLRNKBW-UHFFFAOYSA-N 0.000 claims description 9
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 claims description 9
- 229920001911 maleic anhydride grafted polypropylene Polymers 0.000 claims description 9
- 235000005074 zinc chloride Nutrition 0.000 claims description 9
- 239000011592 zinc chloride Substances 0.000 claims description 9
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 8
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 8
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- BVXGBMBOZMRULW-UHFFFAOYSA-N 1-n,4-n-dicyclohexylbenzene-1,4-dicarboxamide Chemical compound C=1C=C(C(=O)NC2CCCCC2)C=CC=1C(=O)NC1CCCCC1 BVXGBMBOZMRULW-UHFFFAOYSA-N 0.000 claims description 6
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 6
- OKOBUGCCXMIKDM-UHFFFAOYSA-N Irganox 1098 Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)NCCCCCCNC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 OKOBUGCCXMIKDM-UHFFFAOYSA-N 0.000 claims description 3
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 2
- 230000003179 granulation Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000945 filler Substances 0.000 abstract description 9
- 239000002245 particle Substances 0.000 abstract description 3
- 239000005022 packaging material Substances 0.000 abstract description 2
- 239000002861 polymer material Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 11
- 230000004048 modification Effects 0.000 description 9
- 238000012986 modification Methods 0.000 description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910021389 graphene Inorganic materials 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 239000007822 coupling agent Substances 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 229920001490 poly(butyl methacrylate) polymer Polymers 0.000 description 5
- 239000004408 titanium dioxide Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 239000004750 melt-blown nonwoven Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical group [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000000805 composite resin Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000010954 inorganic particle Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000000051 modifying effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 1
- 241001655736 Catalpa bignonioides Species 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 244000082946 Tarchonanthus camphoratus Species 0.000 description 1
- 235000005701 Tarchonanthus camphoratus Nutrition 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000003049 inorganic solvent Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000002147 killing effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
Abstract
The invention discloses a polypropylene composite material for high-strength non-woven fabrics and a preparation method thereof, which belong to the technical field of high polymer materials and comprise the following raw materials in parts by weight: 80-100 parts of polypropylene, 1-3 parts of antioxidant, 5-15 parts of modified illite, 0.1-0.3 part of nucleating agent, 5-10 parts of compatilizer, 1210-20 parts of nylon, 3-7 parts of modified potassium titanate whisker and 0.5-1 part of magnesium stearate. The polypropylene composite material for the high-strength non-woven fabric and the preparation method thereof have the advantages that the compatibility of filler particles in the polypropylene composite material and the polypropylene material is good, and the filler particles are uniformly dispersed in the polypropylene, so that the prepared non-woven fabric has good tensile resistance and toughness, and can be used as industrial or civil packaging materials, filtering materials and the like.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a polypropylene composite material for high-strength non-woven fabrics and a preparation method thereof.
Background
The melt-blown non-woven fabric is a key filtering material in products such as disposable medical surgical masks, medical N95 masks and the like, and is mainly prepared by taking polypropylene as a raw material through the technological processes of feeding, melt extrusion, fiber formation, fiber cooling, net forming, cloth reinforcement and the like. The fiber diameter formed by melt-blowing can reach 1-5 microns, the fiber has a plurality of gaps, a fluffy structure and good crease resistance, and the superfine fibers with unique capillary structures increase the number and the surface area of fibers per unit area, so that the melt-blowing non-woven fabric has good filterability, shielding property, heat insulation and oil absorption. Can be used in the fields of air, liquid filtering materials, isolating materials, absorbing materials, mask materials, thermal insulation materials, oil absorption materials, wiping cloth and the like.
Currently, nonwoven fabric production is mainly modified by adding inorganic powder, and in order to improve the performance of nonwoven fabric polymers, it is very necessary to improve the interface bonding between the inorganic powder and the polymer matrix. In order to obtain a filler having excellent properties, the inorganic particles are generally subjected to surface treatment. The main modification method comprises the following steps: surfactant modification, fatty acid and salt modification, coupling agent modification, compatilizer modification and polymer grafting modification. The coupling agent treatment is the most commonly used method, and after the coupling agent treatment is carried out, the physical and chemical properties of the surface of the filler are changed, so that the interfacial binding force between the filler and a high polymer matrix can be improved, and the material performance is improved. The coupling agent has obvious limitation in treating the filler, one coupling agent can only be used for compatibilizing one or more polymers and filler systems, and the compatibilization effect on other systems is poor, so that the compatibilization requirement of thousands of polymer-based filler systems is difficult to meet.
The Chinese patent application No. 201810379843.5 discloses a preparation method of a graphene/polypropylene non-woven fabric filter screen, which comprises the following steps: (1) graphene surface modification; (2) preparation of graphene/polypropylene resin composite master batch; (3) And (3) preparing a graphene/polypropylene melt-blown non-woven fabric filter screen. The invention provides a preparation method and application of a graphene/polypropylene non-woven fabric filter screen, which improves interception efficiency and a bacterial killing effect, expands the application range in the air filtration field, prepares a graphene/polypropylene resin composite master batch by a master batch-melt compounding method, and finally prepares a melt-blown non-woven fabric material by the composite master batch. However, the method has complex steps, a large number and various inorganic and organic solvents harmful to human bodies are replaced in the graphene modification preparation process, the solvents are replaced in the experimental process in a complicated manner, the treatment difficulty is increased, and the environmental pollution is increased, so that the application of the method is limited.
Disclosure of Invention
Aiming at the defects of the prior art, the main purpose of the invention is to provide a polypropylene composite material for high-strength non-woven fabrics and a preparation method thereof, wherein filler particles in the polypropylene composite material have good compatibility with polypropylene materials and are uniformly dispersed in polypropylene, and the prepared non-woven fabrics have good tensile resistance and toughness and can be used as industrial or civil packaging materials, filtering materials and the like.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the polypropylene composite material for the high-strength non-woven fabric comprises the following raw materials in parts by weight:
preferably, the antioxidant is one or more of antioxidant 1010, antioxidant 2246 and antioxidant 1098; the nucleating agent is one of N, N' -dicyclohexyl terephthalamide and NA-11; the compatilizer is maleic anhydride grafted polypropylene.
Preferably, the preparation method of the modified illite comprises the following steps:
(a) Adding illite into hydrochloric acid for soaking, washing and drying after soaking to obtain pretreated illite;
(b) Placing the pretreated illite obtained in the step (a) into a muffle furnace, then adding zinc chloride, calcining, washing, drying, grinding and sieving after the calcining is finished to obtain zinc-activated illite;
(c) Adding the zinc activated illite obtained in the step (b) into deionized water, then adding tetrabutyl titanate and ethylenediamine, carrying out hydrothermal reaction, filtering and drying after the reaction is finished to obtain solid powder, then adding the solid powder and vinyl tri-tert-butyl peroxy silane into absolute ethyl alcohol, carrying out ball milling, and drying and grinding after the ball milling is finished to obtain the modified illite.
Preferably, the mass concentration of the hydrochloric acid in the step (a) is 10-15%, the soaking temperature is 50-60 ℃ and the soaking time is 4-6h; the mass ratio of the pretreated illite to the zinc chloride in the step (b) is 100:20-30 parts; the calcination temperature is 600-700 ℃ and the calcination time is 2-4h.
Preferably, the mass ratio of the zinc activated illite, tetrabutyl titanate and ethylenediamine in the step (c) is 100:10-20:5-15; the temperature of the hydrothermal reaction is 120-140 ℃, and the reaction time is 6-10h; the mass ratio of the solid powder to the vinyl tri-tert-butyl peroxy silane to the absolute ethyl alcohol is 100:3-7:15-20 parts; the ball milling speed is 2000-3000r/min, and the ball milling time is 0.5-2h.
Preferably, the preparation method of the modified potassium titanate whisker comprises the following steps:
s1, adding potassium titanate whisker into absolute ethyl alcohol, then adding methacryloxypropyl trimethoxysilane, reacting in an ultrasonic field, and filtering and drying after the reaction is finished to obtain pretreated potassium titanate whisker;
s2, adding the pretreated potassium titanate whisker obtained in the step S1 into deionized water, then adding octadecyl dimethyl benzyl ammonium chloride, butyl methacrylate and ammonium persulfate, stirring for reaction, and filtering, washing and drying after the reaction is finished to obtain the modified potassium titanate whisker.
Preferably, in the step S1, the mass ratio of the potassium titanate whisker to the methacryloxypropyl trimethoxysilane is 100:3-5; the power of the ultrasonic field is 200-250W, the reaction temperature is 60-80 ℃, and the reaction time is 2-4h.
Preferably, in the step S2, the mass ratio of the pretreated potassium titanate whisker to the octadecyl dimethyl benzyl ammonium chloride to the butyl methacrylate to the ammonium persulfate is 100:3-5:40-50:0.5-1; the temperature of the stirring reaction is 70-100 ℃, and the reaction time is 3-5h.
The invention also provides a preparation method of the polypropylene composite material for the high-strength non-woven fabric, which comprises the following steps:
(1) Weighing all raw materials according to a formula, sequentially adding half of the total amount of polypropylene, an antioxidant, nylon 12 and a compatilizer into an internal mixer for mixing, and then granulating to obtain polypropylene composite master batch;
(2) And (3) adding the polypropylene composite master batch obtained in the step (1), modified illite, nucleating agent, modified potassium titanate whisker, magnesium stearate and the other half of polypropylene into a high-speed mixer for uniform mixing to obtain a mixed material, and then adding the mixed material into a double-screw extruder for extrusion granulation to obtain the polypropylene composite material for the high-strength non-woven fabric.
Preferably, the banburying temperature in the step (1) is 180-220 ℃, and the banburying time is 10-20min; the stirring speed of the high-speed mixer in the step (2) is 300-500r/min, and the mixing time is 5-10min; the temperature of each section of the double-screw extruder is 180-230 ℃.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the polypropylene composite material for the high-strength non-woven fabric, due to the fact that illite is modified, the interlayer bonding force of illite Li Danpian is strong, the charge density on a sheet layer is high, the ion exchange capacity is low, the compatibility between the polypropylene composite material and a polymer is poor, an ideal reinforcing effect is not easy to achieve, acid treatment is carried out on the polypropylene composite material, interlayer bonding force of the polypropylene composite material is weakened, organic molecules are favorably intercalated or attached to the surface of illite, the modifying effect is strengthened, meanwhile, surface defects of illite after acid treatment are increased, more reaction sites are provided for subsequent modification, and therefore the modifying effect is improved; then, zinc chloride and acidified illite are subjected to eutectic melting and calcination, zinc ions are replaced by Al in an illite crystal layer, electronegativity of illite is improved, and the illite has stronger molecular adsorption capacity in the subsequent steps; the titanium dioxide prepared by the tetrabutyl titanate through hydrothermal reduction is loaded between the layers of the illite, and compared with a direct blending mode, the bonding strength between the titanium dioxide and the illite is effectively improved; finally, carrying out ball milling reaction on vinyl tri-tert-butyl peroxy silane and illite loaded with titanium dioxide, so that the compatibility and the adhesive property of polypropylene and illite are greatly improved, the strength of the polypropylene composite material is obviously improved, and meanwhile, the titanium dioxide is loaded between illite layers by an in-situ reduction method, so that the ultraviolet resistance of polypropylene can be improved.
(2) According to the polypropylene composite material for the high-strength non-woven fabric, the potassium titanate whisker is modified, the potassium titanate whisker and the methacryloxypropyl trimethoxysilane are reacted in an ultrasonic wave field, the ultrasonic wave field enables the surface of the potassium titanate whisker to generate active groups with initiating activity, so that the methacryloxypropyl trimethoxysilane and the surface of the potassium titanate whisker are initiated to perform chemical reaction, silane groups are connected to the surface of the potassium titanate whisker, and the problems that the potassium titanate whisker is small in size, large in specific surface area, high in surface energy and easy to agglomerate are solved; then, octadecyl dimethyl benzyl ammonium chloride and butyl methacrylate react with pretreated potassium titanate, under the emulsification of the octadecyl dimethyl benzyl ammonium chloride, the butyl methacrylate and silane on the surface of the potassium titanate whisker undergo in-situ polymerization reaction, so that the surface of the potassium titanate whisker is coated with a layer of polybutyl methacrylate, and when the polybutyl methacrylate is blended with polypropylene, the compatibility between the potassium titanate whisker and the polypropylene is improved, and the strength and toughness of the polypropylene are effectively improved.
(3) According to the preparation method of the polypropylene composite material for the high-strength non-woven fabric, a part of polypropylene is mixed with the nylon 12, and the melt indexes of the nylon 12 and the polypropylene are relatively large, so that the mixing uniformity of the nylon and the polypropylene is improved in a sectional mixing mode, the nylon and the polypropylene are firstly mixed in an internal mixer, and meanwhile, the compatilizer and the antioxidant are added, so that the compatibility of the nylon and the polypropylene is improved, the thermal oxidation aging degree in the polypropylene banburying process is reduced, the melt indexes of the prepared polypropylene composite master batch and the pure polypropylene are relatively small, and the mixing effect of the polypropylene and the polypropylene can be improved; then extruding and granulating the rest polypropylene, modified illite, nucleating agent, modified potassium titanate whisker, magnesium stearate and polypropylene composite master batch under the action of double screws, thereby improving the tensile resistance and toughness of the polypropylene composite material and ensuring the uniform dispersion of nylon in polypropylene; meanwhile, as the surface of the modified potassium titanate whisker is coated with a layer of polybutylmethacrylate, the polybutylmethacrylate and the vinyl tri-tert-butyl peroxy silane on the surface of the modified illite have strong adhesion performance, and a system formed by the polybutylmethacrylate and the vinyl tri-tert-butyl peroxy silane together strengthens the toughness of the polypropylene composite material and prevents inorganic particles from precipitating.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The polypropylene is melt-blown polypropylene produced by petrifaction in Kunlun, and the melt index (230 ℃ C., 2.16 kg) is 1000+/-100 g/10min;
the NA-11 is purchased from Shanghai Kaijin chemical Co., ltd;
the illite is purchased from Altai mining Co., ltd. In Lingshu county, and the mesh number is 600 mesh;
the maleic anhydride grafted polypropylene is purchased from Toguan camphor wood catalpa alta-Mey plastic manager with the trade name of DuPont 50E725;
the nylon 12 is PA12 of Amara France with the trademark MA4411;
the potassium titanate whisker is purchased from Jinan Anji chemical Co., ltd, is potassium hexatitanate whisker, and has the length of 40-80 mu m and the diameter of 5-10 mu m;
example 1
The preparation method of the polypropylene composite material for the high-strength non-woven fabric comprises the following steps:
(1) Weighing the raw materials according to the formula, sequentially adding 4.5kg of polypropylene, 0.2kg of antioxidant 2246, 1.5kg of nylon 12 and 0.8kg of maleic anhydride grafted polypropylene into an internal mixer for mixing, wherein the internal mixing temperature is 200 ℃, and the internal mixing time is 15min; granulating after banburying is completed to obtain polypropylene composite master batch;
(2) Adding the polypropylene composite master batch (7 kg) obtained in the step (1), 1kg of modified illite, 0.02kg of N, N' -dicyclohexyl terephthalamide, 0.5kg of modified potassium titanate whisker, 0.08kg of magnesium stearate and 4.5kg of polypropylene into a high-speed mixer, uniformly mixing to obtain a mixed material, then adding the mixed material into a double-screw extruder, extruding and granulating at the temperature of 180 ℃, 190 ℃, 230 ℃, 210 ℃ and 190 ℃ in the machine head temperature of the extruder to obtain the polypropylene composite material for the high-strength non-woven fabric.
The preparation method of the modified illite comprises the following steps:
(a) Adding 100g illite into 800mL hydrochloric acid with the mass concentration of 13% for soaking at the temperature of 55 ℃ for 5 hours, and washing and drying after the soaking is completed to obtain pretreated illite;
(b) Placing the pretreated illite (100 g) obtained in the step (a) into a muffle furnace, then adding 25g of zinc chloride, calcining for 3 hours at 650 ℃, washing, drying and grinding after the calcining is finished, and sieving through a 400-mesh sieve to obtain zinc activated illite;
(c) Adding 100g of zinc activated illite obtained in the step (b) into 800mL of deionized water, then adding 15g of tetrabutyl titanate and 10g of ethylenediamine, carrying out hydrothermal reaction at 130 ℃ for 8h, filtering and drying after the reaction is finished to obtain solid powder, then adding 100g of solid powder and 5g of vinyl tri-tert-butylperoxy silane into 18g of absolute ethyl alcohol, carrying out ball milling for 1h at the rotating speed of 2500r/min, and drying and grinding after the ball milling is finished to obtain the modified illite.
The preparation method of the modified potassium titanate whisker comprises the following steps:
s1, adding 100g of potassium titanate whisker into 800mL of absolute ethyl alcohol, then adding 5g of methacryloxypropyl trimethoxy silane, reacting in an ultrasonic wave field with the power of 230W, the reaction temperature of 70 ℃ and the reaction time of 3 hours, and filtering and drying after the reaction is completed to obtain pretreated potassium titanate whisker;
s2, adding the pretreated potassium titanate whisker (100 g) obtained in the step S1 into 900mL of deionized water, then adding 4g of octadecyl dimethyl benzyl ammonium chloride, 45g of butyl methacrylate and 0.8g of ammonium persulfate, stirring at 200r/min and 90 ℃ for reaction for 4 hours, and filtering, washing and drying after the reaction is completed to obtain the modified potassium titanate whisker.
Example 2
The preparation method of the polypropylene composite material for the high-strength non-woven fabric comprises the following steps:
(1) Weighing all raw materials according to a formula, sequentially adding 4kg of polypropylene, 0.1kg of antioxidant 1010, 1kg of nylon 12 and 0.5kg of maleic anhydride grafted polypropylene into an internal mixer for mixing, wherein the internal mixing temperature is 180 ℃, and the internal mixing time is 10min; granulating after banburying is completed to obtain polypropylene composite master batch;
(2) Adding the polypropylene composite master batch (5.6 kg), 0.5kg of modified illite, 0.01kg of NA-11, 0.3kg of modified potassium titanate whisker, 0.05kg of magnesium stearate and 4kg of polypropylene obtained in the step (1) into a high-speed mixer for uniformly mixing to obtain a mixed material, then adding the mixed material into a double-screw extruder, extruding and granulating at the temperature of 180 ℃, 190 ℃, 230 ℃ and 210 ℃ at the temperature of a machine head of 190 ℃ to obtain the polypropylene composite material for the high-strength non-woven fabric.
The preparation method of the modified illite comprises the following steps:
(a) Adding 100g illite into 800mL hydrochloric acid with mass concentration of 10% for soaking at 50 ℃ for 4 hours, washing and drying after soaking to obtain pretreated illite;
(b) Placing the pretreated illite (100 g) obtained in the step (a) into a muffle furnace, adding 20g of zinc chloride, calcining for 2 hours at 600 ℃, washing, drying, grinding and sieving with a 400-mesh sieve to obtain zinc activated illite;
(c) Adding the zinc activated illite (100 g) obtained in the step (b) into 800mL of deionized water, then adding 10g of tetrabutyl titanate and 5g of ethylenediamine, carrying out hydrothermal reaction at 120 ℃ for 6h, filtering and drying after the reaction is finished to obtain solid powder, then adding 100g of solid powder and 3g of vinyl tri-tert-butyl peroxy silane into 15g of absolute ethyl alcohol, carrying out ball milling for 0.5h at the rotating speed of 2000r/min, and drying and grinding after the ball milling is finished to obtain the modified illite.
The preparation method of the modified potassium titanate whisker comprises the following steps:
s1, adding 100g of potassium titanate whisker into 800mL of absolute ethyl alcohol, then adding 3g of methacryloxypropyl trimethoxy silane, reacting in an ultrasonic wave field with the power of 200W, the reaction temperature of 60 ℃ and the reaction time of 2h, and filtering and drying after the reaction is completed to obtain pretreated potassium titanate whisker;
s2, adding 100g of the pretreated potassium titanate whisker obtained in the step S1 into 800mL of deionized water, then adding 3g of octadecyl dimethyl benzyl ammonium chloride, 40g of butyl methacrylate and 0.5g of ammonium persulfate, stirring at 150r/min and 70 ℃ for reaction for 3 hours, and filtering, washing and drying after the reaction is completed to obtain the modified potassium titanate whisker.
Example 3
The preparation method of the polypropylene composite material for the high-strength non-woven fabric comprises the following steps:
(1) Weighing all raw materials according to a formula, sequentially adding 5kg of polypropylene, 0.3kg of antioxidant 1098, 2kg of nylon 12 and 1kg of maleic anhydride grafted polypropylene into an internal mixer for mixing, wherein the internal mixing temperature is 220 ℃, and the internal mixing time is 20min; granulating after banburying is completed to obtain polypropylene composite master batch;
(2) Adding the polypropylene composite master batch (8.3 kg), 1.5kg of modified illite, 0.03kg of modified potassium titanate whisker, 0.7kg of magnesium stearate and 5kg of polypropylene obtained in the step (1) into a high-speed mixer for uniformly mixing to obtain a mixed material, then adding the mixed material into a double-screw extruder, extruding and granulating at the temperature of 180 ℃, 190 ℃, 230 ℃ and 210 ℃ in each section of the extruder and at the temperature of 190 ℃ in a machine head, thus obtaining the polypropylene composite material for the high-strength non-woven fabric.
The preparation method of the modified illite comprises the following steps:
(a) Adding 100g illite into 800mL hydrochloric acid with mass concentration of 15% for soaking at 60 ℃ for 6 hours, washing and drying after soaking to obtain pretreated illite;
(b) Placing the pretreated illite (100 g) obtained in the step (a) into a muffle furnace, adding 30g of zinc chloride, calcining for 4 hours at 700 ℃, washing, drying, grinding and sieving with a 400-mesh sieve to obtain zinc activated illite;
(c) Adding 100g of zinc activated illite obtained in the step (b) into 800mL of deionized water, then adding 20g of tetrabutyl titanate and 15g of ethylenediamine, carrying out hydrothermal reaction at 140 ℃ for 10h, filtering and drying after the reaction is finished to obtain solid powder, then adding 100g of solid powder and 7g of vinyl tri-tert-butyl peroxy silane into 20g of absolute ethyl alcohol, carrying out ball milling for 2h at the rotating speed of 3000r/min, and drying and grinding after the ball milling is finished to obtain the modified illite.
The preparation method of the modified potassium titanate whisker comprises the following steps:
s1, adding 100g of potassium titanate whisker into 800mL of absolute ethyl alcohol, then adding 5g of methacryloxypropyl trimethoxy silane, reacting in an ultrasonic wave field with the power of 250W, the reaction temperature of 80 ℃ and the reaction time of 4 hours, and filtering and drying after the reaction is completed to obtain pretreated potassium titanate whisker;
s2, adding 100g of the pretreated potassium titanate whisker obtained in the step S1 into 800mL of deionized water, then adding 5g of octadecyl dimethyl benzyl ammonium chloride, 50g of butyl methacrylate and 1g of ammonium persulfate, stirring at the temperature of 100 ℃ for reaction for 5 hours at the speed of 250r/min, and filtering, washing and drying after the reaction is completed to obtain the modified potassium titanate whisker.
Comparative example 1
The preparation method of the polypropylene composite material for the high-strength non-woven fabric comprises the following steps:
(1) Weighing the raw materials according to the formula, sequentially adding 4.5kg of polypropylene, 0.2kg of antioxidant 2246, 1.5kg of nylon 12 and 0.8kg of maleic anhydride grafted polypropylene into an internal mixer for mixing, wherein the internal mixing temperature is 200 ℃, and the internal mixing time is 15min; granulating after banburying is completed to obtain polypropylene composite master batch;
(2) Adding the polypropylene composite master batch (7 kg) obtained in the step (1), 1kg of modified illite, 0.02kg of N, N' -dicyclohexyl terephthalamide, 0.5kg of potassium titanate whisker, 0.08kg of magnesium stearate and 4.5kg of polypropylene into a high-speed mixer, uniformly mixing to obtain a mixed material, then adding the mixed material into a double-screw extruder, extruding and granulating at the temperature of 180 ℃, 190 ℃, 230 ℃, 210 ℃ and 190 ℃ in the machine head temperature of the extruder to obtain the polypropylene composite material for the high-strength non-woven fabric.
The preparation method of the modified illite comprises the following steps:
(a) Adding 100g illite into 800mL hydrochloric acid with the mass concentration of 13% for soaking at the temperature of 55 ℃ for 5 hours, and washing and drying after the soaking is completed to obtain pretreated illite;
(b) Placing the pretreated illite (100 g) obtained in the step (a) into a muffle furnace, then adding 25g of zinc chloride, calcining for 3 hours at 650 ℃, washing, drying and grinding after the calcining is finished, and sieving through a 400-mesh sieve to obtain zinc activated illite;
(c) Adding 100g of zinc activated illite obtained in the step (b) into 800mL of deionized water, then adding 15g of tetrabutyl titanate and 10g of ethylenediamine, carrying out hydrothermal reaction at 130 ℃ for 8h, filtering and drying after the reaction is finished to obtain solid powder, then adding 100g of solid powder and 5g of vinyl tri-tert-butylperoxy silane into 18g of absolute ethyl alcohol, carrying out ball milling for 1h at the rotating speed of 2500r/min, and drying and grinding after the ball milling is finished to obtain the modified illite.
Comparative example 2
The preparation method of the polypropylene composite material for the high-strength non-woven fabric comprises the following steps:
(1) Weighing the raw materials according to the formula, sequentially adding 4.5kg of polypropylene, 0.2kg of antioxidant 2246, 1.5kg of nylon 12 and 0.8kg of maleic anhydride grafted polypropylene into an internal mixer for mixing, wherein the internal mixing temperature is 200 ℃, and the internal mixing time is 15min; granulating after banburying is completed to obtain polypropylene composite master batch;
(2) Adding the polypropylene composite master batch (7 kg), 1kg of illite, 0.02kg of N, N' -dicyclohexyl terephthalamide, 0.5kg of modified potassium titanate whisker, 0.08kg of magnesium stearate and 4.5kg of polypropylene obtained in the step (1) into a high-speed mixer for uniformly mixing to obtain a mixed material, then adding the mixed material into a double-screw extruder, extruding and granulating at the temperature of 180 ℃, 190 ℃, 230 ℃, 210 ℃ and 190 ℃ at the temperature of a machine head to obtain the polypropylene composite material for the high-strength non-woven fabric.
The preparation method of the modified potassium titanate whisker comprises the following steps:
s1, adding 100g of potassium titanate whisker into 800mL of absolute ethyl alcohol, then adding 5g of methacryloxypropyl trimethoxy silane, reacting in an ultrasonic wave field with the power of 230W, the reaction temperature of 70 ℃ and the reaction time of 3 hours, and filtering and drying after the reaction is completed to obtain pretreated potassium titanate whisker;
s2, adding the pretreated potassium titanate whisker (100 g) obtained in the step S1 into 900mL of deionized water, then adding 4g of octadecyl dimethyl benzyl ammonium chloride, 45g of butyl methacrylate and 0.8g of ammonium persulfate, stirring at 200r/min and 90 ℃ for reaction for 4 hours, and filtering, washing and drying after the reaction is completed to obtain the modified potassium titanate whisker.
Comparative example 3
The preparation method of the polypropylene composite material for the high-strength non-woven fabric comprises the following steps:
(1) Weighing the raw materials according to the formula, sequentially adding 4.5kg of polypropylene, 0.2kg of antioxidant 2246, 1.5kg of nylon 12 and 0.8kg of maleic anhydride grafted polypropylene into an internal mixer for mixing, wherein the internal mixing temperature is 200 ℃, and the internal mixing time is 15min; granulating after banburying is completed to obtain polypropylene composite master batch;
(2) Adding the polypropylene composite master batch (7 kg), 1kg of illite, 0.02kg of N, N' -dicyclohexyl terephthalamide, 0.5kg of potassium titanate whisker, 0.08kg of magnesium stearate and 4.5kg of polypropylene obtained in the step (1) into a high-speed mixer for uniformly mixing to obtain a mixed material, then adding the mixed material into a double-screw extruder, extruding and granulating at the temperature of 180 ℃, 190 ℃, 230 ℃, 210 ℃ and 190 ℃ at the temperature of a machine head to obtain the polypropylene composite material for the high-strength non-woven fabric.
The polypropylene composite materials prepared in examples 1 to 3 and comparative examples 1 to 3 were dried, and then melt-blown spinning was used to prepare polypropylene composite materials having a gram weight of 30g/m at 200 to 250 ℃ 2 The nonwoven fabric was cut into strips of 50 mm. Times.300 mm, subjected to humidity control at 20℃and 65% relative temperature, and tested for breaking strength and elongation at break according to the method of Standard GB-T24218.3-2010, and the test pieces were stretched at a constant elongation speed of 100mm/min until breaking, with the test results shown in Table 1 below:
TABLE 1
| Gram weight (g/m) 2 ) | Longitudinal/transverse breaking strength (N) | Elongation at break in machine direction/transverse direction (%) | |
| Example 1 | 33 | 130.8/42.5 | 221/204 |
| Example 2 | 29 | 126.2/37.1 | 211/198 |
| Example 3 | 32 | 129.5/32.5 | 203/191 |
| Comparative example 1 | 33 | 83.1/22.7 | 135/129 |
| Comparative example 2 | 34 | 80.6/21.9 | 137/131 |
| Comparative example 3 | 28 | 67.5/19.3 | 113/107 |
As can be seen from the above table, the nonwoven fabrics prepared in examples 1 to 3 of the present invention have significantly improved breaking strength and elongation at break strength compared with the nonwoven fabrics prepared in comparative examples 1 to 3, which means that the modified potassium titanate whisker and modified illite whisker have good dispersibility and compatibility between polypropylene and nylon 12, and the illite whisker can exert a stress transmitting effect, so that the strength and toughness of the nonwoven fabrics are significantly improved, the potassium titanate whisker is not modified in comparative example 1, the illite is not modified in comparative example 2, and the potassium titanate whisker and illite are not modified in comparative example 3, and the strength and toughness of the nonwoven fabrics prepared therefrom are significantly reduced.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The polypropylene composite material for the high-strength non-woven fabric is characterized by comprising the following raw materials in parts by weight: 80-100 parts of polypropylene, 1-3 parts of antioxidant, 5-15 parts of modified illite, 0.1-0.3 part of nucleating agent, 5-12 parts of compatilizer, 12-20 parts of nylon, 3-7 parts of modified potassium titanate whisker and 0.5-1 part of magnesium stearate;
the preparation method of the modified illite comprises the following steps:
(a) Adding illite into hydrochloric acid for soaking, washing and drying after soaking to obtain pretreated illite;
(b) Placing the pretreated illite obtained in the step (a) into a muffle furnace, then adding zinc chloride, calcining, washing, drying, grinding and sieving after the calcining is finished to obtain zinc-activated illite;
(c) Adding zinc activated illite obtained in the step (b) into deionized water, then adding tetrabutyl titanate and ethylenediamine, carrying out hydrothermal reaction, filtering and drying after the reaction is finished to obtain solid powder, then adding the solid powder and vinyl tri-tert-butyl peroxy silane into absolute ethyl alcohol, carrying out ball milling, and drying and grinding after the ball milling is finished to obtain the modified illite;
the mass concentration of the hydrochloric acid in the step (a) is 10-15%, the soaking temperature is 50-60 ℃ and the soaking time is 4-6h; the mass ratio of the pretreated illite to the zinc chloride in the step (b) is 100:20-30 parts; the calcining temperature is 600-700 ℃ and the calcining time is 2-4h; the mass ratio of the zinc-activated illite to the tetrabutyl titanate to the ethylenediamine in the step (c) is 100:10-20:5-15; the temperature of the hydrothermal reaction is 120-140 ℃, and the reaction time is 6-10h; the mass ratio of the solid powder to the vinyl tri-tert-butyl peroxy silane to the absolute ethyl alcohol is 100:3-7:15-20 parts; the ball milling speed is 2000-3000r/min, and the ball milling time is 0.5-2h;
the preparation method of the modified potassium titanate whisker comprises the following steps:
s1, adding potassium titanate whisker into absolute ethyl alcohol, then adding methacryloxypropyl trimethoxysilane, reacting in an ultrasonic field, and filtering and drying after the reaction is finished to obtain pretreated potassium titanate whisker;
s2, adding the pretreated potassium titanate whisker obtained in the step S1 into deionized water, then adding octadecyl dimethyl benzyl ammonium chloride, butyl methacrylate and ammonium persulfate, stirring for reaction, and filtering, washing and drying after the reaction is finished to obtain the modified potassium titanate whisker;
the mass ratio of the potassium titanate whisker to the methacryloxypropyl trimethoxysilane in the step S1 is 100:3-5; the power of the ultrasonic field is 200-250W, the reaction temperature is 60-80 ℃, and the reaction time is 2-4h; the mass ratio of the pretreated potassium titanate whisker to the octadecyl dimethyl benzyl ammonium chloride to the butyl methacrylate to the ammonium persulfate in the step S2 is 100:3-5:40-50:0.5-1; the temperature of the stirring reaction is 70-100 ℃, and the reaction time is 3-5h.
2. The polypropylene composite material for high-strength non-woven fabrics according to claim 1, wherein the antioxidant is one or more of antioxidant 1010, antioxidant 2246 and antioxidant 1098; the nucleating agent is one of N, N' -dicyclohexyl terephthalamide and NA-11; the compatilizer is maleic anhydride grafted polypropylene.
3. A method for preparing the polypropylene composite material for high-strength nonwoven fabric according to any one of claims 1 to 2, comprising the steps of:
(1) Weighing all raw materials according to a formula, sequentially adding half of the total amount of polypropylene, an antioxidant, nylon 12 and a compatilizer into an internal mixer for mixing, and then granulating to obtain polypropylene composite master batch;
(2) And (3) adding the polypropylene composite master batch obtained in the step (1), modified illite, nucleating agent, modified potassium titanate whisker, magnesium stearate and the other half of polypropylene into a high-speed mixer for uniform mixing to obtain a mixed material, and then adding the mixed material into a double-screw extruder for extrusion granulation to obtain the polypropylene composite material for the high-strength non-woven fabric.
4. The method for producing a polypropylene composite for high-strength nonwoven fabric according to claim 3, wherein the banburying temperature in step (1) is 180 to 220 ℃ and the banburying time is 10 to 20min; the stirring speed of the high-speed mixer in the step (2) is 300-500r/min, and the mixing time is 5-10min; the temperature of each section of the double-screw extruder is 180-230 ℃.
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