CN117720778A - Polyolefin composite material for photovoltaic backboard and production process thereof - Google Patents
Polyolefin composite material for photovoltaic backboard and production process thereof Download PDFInfo
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- CN117720778A CN117720778A CN202311822273.XA CN202311822273A CN117720778A CN 117720778 A CN117720778 A CN 117720778A CN 202311822273 A CN202311822273 A CN 202311822273A CN 117720778 A CN117720778 A CN 117720778A
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- 229920000098 polyolefin Polymers 0.000 title claims abstract description 77
- 239000002131 composite material Substances 0.000 title claims abstract description 75
- 238000004519 manufacturing process Methods 0.000 title abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000002156 mixing Methods 0.000 claims abstract description 41
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical class [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims abstract description 32
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 26
- 229910052901 montmorillonite Inorganic materials 0.000 claims abstract description 22
- -1 polyethylene Polymers 0.000 claims abstract description 22
- 239000003607 modifier Substances 0.000 claims abstract description 19
- 238000002360 preparation method Methods 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 12
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 12
- 239000004698 Polyethylene Substances 0.000 claims abstract description 11
- 229910001000 nickel titanium Inorganic materials 0.000 claims abstract description 11
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 11
- 229920000573 polyethylene Polymers 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
- 229910052582 BN Inorganic materials 0.000 claims abstract description 9
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000004611 light stabiliser Substances 0.000 claims abstract description 9
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 9
- 239000004945 silicone rubber Substances 0.000 claims abstract description 9
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000003490 calendering Methods 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 238000007493 shaping process Methods 0.000 claims abstract description 4
- 238000009966 trimming Methods 0.000 claims abstract description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 72
- 239000004917 carbon fiber Substances 0.000 claims description 72
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 64
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 34
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 28
- 238000001035 drying Methods 0.000 claims description 24
- 238000005406 washing Methods 0.000 claims description 19
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 18
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 16
- 229910001868 water Inorganic materials 0.000 claims description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
- 235000006708 antioxidants Nutrition 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000007853 buffer solution Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 8
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 claims description 8
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 7
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 7
- 229910021389 graphene Inorganic materials 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 7
- 238000009210 therapy by ultrasound Methods 0.000 claims description 7
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 6
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 6
- 239000002041 carbon nanotube Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 229920000106 Liquid crystal polymer Polymers 0.000 claims description 5
- 239000004974 Thermotropic liquid crystal Substances 0.000 claims description 5
- ZZZCUOFIHGPKAK-UHFFFAOYSA-N D-erythro-ascorbic acid Natural products OCC1OC(=O)C(O)=C1O ZZZCUOFIHGPKAK-UHFFFAOYSA-N 0.000 claims description 4
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 4
- 229930003268 Vitamin C Natural products 0.000 claims description 4
- WHMDKBIGKVEYHS-IYEMJOQQSA-L Zinc gluconate Chemical compound [Zn+2].OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O.OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O WHMDKBIGKVEYHS-IYEMJOQQSA-L 0.000 claims description 4
- 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 4
- 239000002270 dispersing agent Substances 0.000 claims description 4
- ANSXAPJVJOKRDJ-UHFFFAOYSA-N furo[3,4-f][2]benzofuran-1,3,5,7-tetrone Chemical compound C1=C2C(=O)OC(=O)C2=CC2=C1C(=O)OC2=O ANSXAPJVJOKRDJ-UHFFFAOYSA-N 0.000 claims description 4
- ZHDTXTDHBRADLM-UHFFFAOYSA-N hydron;2,3,4,5-tetrahydropyridin-6-amine;chloride Chemical compound Cl.NC1=NCCCC1 ZHDTXTDHBRADLM-UHFFFAOYSA-N 0.000 claims description 4
- 239000001755 magnesium gluconate Substances 0.000 claims description 4
- 229960003035 magnesium gluconate Drugs 0.000 claims description 4
- 235000015778 magnesium gluconate Nutrition 0.000 claims description 4
- IAKLPCRFBAZVRW-XRDLMGPZSA-L magnesium;(2r,3s,4r,5r)-2,3,4,5,6-pentahydroxyhexanoate;hydrate Chemical compound O.[Mg+2].OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O.OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O IAKLPCRFBAZVRW-XRDLMGPZSA-L 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 4
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 4
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 4
- 235000019154 vitamin C Nutrition 0.000 claims description 4
- 239000011718 vitamin C Substances 0.000 claims description 4
- 239000011670 zinc gluconate Substances 0.000 claims description 4
- 235000011478 zinc gluconate Nutrition 0.000 claims description 4
- 229960000306 zinc gluconate Drugs 0.000 claims description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 3
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
- 229940022682 acetone Drugs 0.000 claims description 3
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 3
- 235000019441 ethanol Nutrition 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000001291 vacuum drying Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 abstract description 16
- 230000000052 comparative effect Effects 0.000 description 15
- 230000005540 biological transmission Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- XLDBGFGREOMWSL-UHFFFAOYSA-N n,n'-bis[2,6-di(propan-2-yl)phenyl]methanediimine Chemical compound CC(C)C1=CC=CC(C(C)C)=C1N=C=NC1=C(C(C)C)C=CC=C1C(C)C XLDBGFGREOMWSL-UHFFFAOYSA-N 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000004642 Polyimide Substances 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 229920001721 polyimide Polymers 0.000 description 4
- 239000001110 calcium chloride Substances 0.000 description 3
- 229910001628 calcium chloride Inorganic materials 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000001132 ultrasonic dispersion Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002313 adhesive film Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- QUAMTGJKVDWJEQ-UHFFFAOYSA-N octabenzone Chemical group OC1=CC(OCCCCCCCC)=CC=C1C(=O)C1=CC=CC=C1 QUAMTGJKVDWJEQ-UHFFFAOYSA-N 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical group CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 125000005462 imide group Chemical group 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229940116351 sebacate Drugs 0.000 description 1
- CXMXRPHRNRROMY-UHFFFAOYSA-L sebacate(2-) Chemical compound [O-]C(=O)CCCCCCCCC([O-])=O CXMXRPHRNRROMY-UHFFFAOYSA-L 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application relates to the technical field of photovoltaic backboard preparation, and particularly discloses a polyolefin composite material for a photovoltaic backboard and a production process thereof. A polyolefin composite material for a photovoltaic backboard is mainly prepared from the following raw materials: polyethylene, light stabilizer, antioxidant, compatilizer, auxiliary agent, modifier, montmorillonite, methyl vinyl phenyl silicone rubber, polyacrylamide resin, alumina, flaky boron nitride and ultraviolet absorber, wherein the auxiliary agent comprises modified sodium polyacrylate, N' -bis (2, 6-diisopropylphenyl) carbodiimide and nickel-titanium alloy; the preparation method comprises the following steps: mixing the raw materials to obtain a premix; mixing the premix and extruding to obtain an extrudate; and (3) carrying out calendaring shaping, cooling, trimming and rolling on the extrudate to obtain the product. The polyolefin composite material prepared by the method has good water vapor barrier property and heat resistance.
Description
Technical Field
The application relates to the technical field of photovoltaic backboard preparation, in particular to a polyolefin composite material for a photovoltaic backboard and a production process thereof.
Background
The solar photovoltaic power generation serving as a representative of clean energy has the advantages of sustainability, environment friendliness, safety, reliability and the like.
The photovoltaic module is the most basic unit of solar photovoltaic power generation. The photovoltaic module consists of five layers of structures of photovoltaic glass, EVA, solar cells, EVA and a photovoltaic backboard, wherein the photovoltaic backboard is a guarantee material of the photovoltaic module and is a key factor for determining the reliability of the photovoltaic module. The photovoltaic backboard mainly plays a role in supporting and protecting the battery piece, so that the influence of external environment factors on the battery piece is reduced, the performance of the photovoltaic backboard directly influences the performance of the photovoltaic module, and therefore, the photovoltaic backboard is required to have better water resistance, insulativity and aging resistance.
The traditional photovoltaic backboard is generally a PET backboard, the PET backboard is easy to hydrolyze, cracking delamination is easy to occur under the high-temperature and high-humidity environment, and the PET backboard is easy to occur PID effect in the use process, the PID effect refers to the effect that the performance of the photovoltaic panel can be gradually attenuated after long-time working, the PID effect is easiest to occur under the humid environment, the activity degree of the PID effect is related to the humidity degree, the water vapor transmittance of the backboard can be continuously increased in the use process at the later stage of the photovoltaic backboard along with the influence of factors such as outdoor ultraviolet, damp and heat, and the water vapor permeates into the packaging system through the backboard to influence the cohesiveness of a packaging adhesive film, so that the backboard and the packaging adhesive film delaminate, so that a battery piece is oxidized, and the power generation efficiency of the battery piece and the service life of the module are seriously reduced.
The polyolefin back plate has the characteristics of better water resistance, chemical resistance, electrical insulation and the like, is convenient for effectively improving the performance of the photovoltaic back plate and improving the protection effect of the photovoltaic back plate, but the polyolefin material takes carbon-carbon bonds as a circulating unit, is generally of a linear structure, and has lower thermal deformation temperature of polyethylene, thus having poorer heat resistance.
Therefore, there is a need to prepare a photovoltaic back sheet with better moisture barrier and heat resistance.
Disclosure of Invention
In order to further improve the water vapor barrier property and the heat resistance of the photovoltaic backboard, the application provides a polyolefin composite material for the photovoltaic backboard and a production process thereof.
In a first aspect, the present application provides a polyolefin composite material for a photovoltaic back sheet, which adopts the following technical scheme:
the polyolefin composite material for the photovoltaic backboard is mainly prepared from the following raw materials in parts by weight: 95-100 parts of polyethylene, 1-2 parts of light stabilizer, 1-2 parts of antioxidant, 1-2 parts of compatilizer, 5-8 parts of auxiliary agent, 5-8 parts of modifier, 2-3 parts of montmorillonite, 0.5-1 part of methyl vinyl phenyl silicone rubber, 1-2 parts of polyacrylamide resin, 10-15 parts of alumina, 5-10 parts of flaky boron nitride and 1-2 parts of ultraviolet absorber, wherein the modifier comprises carbon fiber, octavinyl silsesquioxane and silicon carbide, the auxiliary agent comprises modified sodium polyacrylate, N' -bis (2, 6-diisopropylphenyl) carbodiimide and nickel-titanium alloy, and the preparation method of the modified sodium polyacrylate comprises the following steps: mixing sodium polyacrylate, carbon nanotube, water, carbon fiber and active alumina to obtain a first mixture, mixing the first mixture with a calcium chloride solution, washing, drying to obtain a second mixture, mixing the second mixture with a lithium chloride solution, washing, drying to obtain a third mixture, mixing sodium dodecyl sulfate with a dispersing agent, adding the third mixture and potassium persulfate, heating, adding methyl methacrylate, reacting, washing, and drying to obtain the product.
By adopting the technical proposal, the raw material components are proportioned and adjusted by adding the auxiliary agent, the modifier, the methyl vinyl phenyl silicone rubber, the polyacrylamide resin and other raw materials into the polyolefin composite material, so that the proportioned components reach the best, the raw materials are matched with each other, the heat conductivity of the polyolefin composite material is convenient to be improved, the influence of heat on the water vapor barrier property of the composite material is reduced, the speed of water vapor permeation is slowed down, the heat resistance of the polyolefin composite material is improved,
the modified sodium polyacrylate in the auxiliary agent has dryness, is convenient to cooperate with the polyacrylamide resin, absorbs water vapor passing through the polyolefin composite material, possibly blocks partial water vapor transmission, and is wrapped with activated alumina, carbon nanotubes and carbon fibers, so that heat is conveniently led out, the rate of water vapor transmission is slowed down, the passing water vapor is better absorbed by the sodium polyacrylate, and meanwhile, the absorption of calcium chloride and aluminum chloride is convenient to further improve the hygroscopicity of the sodium polyacrylate, and the polymethyl methacrylate has hydrophobicity and is wrapped on the outer layer of the sodium polyacrylate, so that the condition that the water vapor escapes due to excessive absorption of the sodium polyacrylate is reduced, and meanwhile, the sodium polyacrylate is matched with montmorillonite to prolong the transmission path of the water vapor; the addition of the N, N' -bis (2, 6-diisopropylphenyl) carbodiimide and the nickel-titanium alloy is convenient for further matching with other raw materials in the polyolefin composite material, thereby improving the water vapor barrier property of the polyolefin composite material;
the carbon fiber, the octavinyl silsesquioxane and the silicon carbide in the modifier are mutually matched, the carbon fiber and the silicon carbide are mutually matched, so that a heat conduction net structure is formed, on one hand, the water vapor transmission path is convenient to prolong, on the other hand, the water vapor transmission speed is convenient to slow down, the octavinyl silsesquioxane is convenient to improve the distribution uniformity of the carbon fiber and the silicon carbide in the polyolefin composite material, the water vapor barrier property of the polyolefin composite material is further improved, and meanwhile, the heat resistance of the polyolefin composite material is improved.
Preferably, the carbon fiber is a modified carbon fiber, and the preparation method of the modified carbon fiber comprises the following steps: s1, mixing carbon fibers with acetone, adding ammonia water, performing ultrasonic treatment to obtain a dispersion liquid, dropwise adding zinc gluconate, magnesium gluconate and acetone mixed liquid into the dispersion liquid, stirring, separating, washing and drying to obtain carbon fibers I; s2, mixing the carbon fiber I, graphene oxide and N, N-dimethylformamide, performing ultrasonic treatment, adding polyvinylpyrrolidone and vitamin C, heating in a water bath, reacting, cleaning, and performing vacuum drying to obtain a carbon fiber II; s3, mixing and dissolving 4, 4-diaminodiphenyl ether and N, N-dimethylformamide to obtain a mixed solution, adding carbon fiber II, dispersing, introducing nitrogen, adding pyromellitic anhydride, reacting, and drying to obtain the composite material.
By adopting the technical scheme, the carbon fiber is modified, the zinc oxide and magnesium oxide heat conduction layer, the graphene and the polyimide heat-resistant layer are sequentially coated on the outer layer of the carbon fiber, the adsorption strength of polyimide on the surface of the carbon fiber is conveniently enhanced by introducing the graphene, meanwhile, the heat conductivity of the heat-resistant layer is enhanced, the electron density of an aromatic ring structure in the graphene is very high, and the effect of rejecting penetration of atoms or molecules is achieved; the polyimide main chain contains an imide ring and a relatively stable aromatic heterocycle, so that the polyimide has better heat resistance, high modulus and high creep resistance, is convenient for prolonging the path of water vapor permeation, reduces the water vapor permeability, and is convenient for further improving the water vapor barrier property and the heat resistance of the polyolefin composite material.
Preferably, the carbon fiber in the step S1 is a pretreated carbon fiber, and the preparation method of the pretreated carbon fiber includes the following steps: mixing water and ethanol, adding ammonia water to obtain a treatment solution, putting carbon fibers into the treatment solution, dripping tetraethoxysilane, taking out the treated carbon fibers, washing, drying, then mixing with hexamethyldisilazane, and drying to obtain the product.
Through adopting above-mentioned technical scheme, carry out the preliminary treatment to carbon fiber, wrap up the silica layer at the carbon fiber skin, be convenient for improve the roughness on carbon fiber surface, be convenient for better carry out the modification to carbon fiber, be convenient for wrap up zinc oxide, magnesium oxide heat conduction layer on carbon fiber surface, magnesium oxide has heat conductivity and is heated little inflation, is convenient for further improve combined material's compactness, and then improves the steam separation nature of photovoltaic backplate.
Preferably, the modifier consists of carbon fiber, octavinyl silsesquioxane and silicon carbide in the mass ratio of (2-3) (1-2) (4-5).
By adopting the technical scheme, the modifier is prepared by compounding three components of carbon fiber, octavinyl silsesquioxane and silicon carbide, and the proportion of the three components is adjusted, so that the proportion of the three components is better, the carbon fiber and the silicon carbide have good thermal conductivity, a network structure with good thermal conductivity can be formed, the local temperature is higher due to slower heat dispersion can be reduced conveniently, and the situation of overhigh water vapor transmittance can occur; meanwhile, the addition of the silicon carbide enables the lamellar inorganic structure to be formed in the polyolefin layer, so that the water vapor transmission amount can be further reduced, and the damp-heat aging resistance is improved; silicon carbide has the characteristics of large specific surface area, high surface activity, high hardness, high wear resistance, good self-lubrication, high thermal conductivity, low thermal expansion coefficient and the like, and is convenient for further reducing the water vapor permeability of the polyolefin composite material; the addition of octavinyl silsesquioxane is convenient for further improving the barrier property of the polyolefin composite material to water vapor, and the octavinyl silsesquioxane is matched with silicon carbide to improve the water vapor barrier property and heat resistance of the polyolefin composite material.
Preferably, the auxiliary agent consists of modified sodium polyacrylate, N' -di (2, 6-diisopropylphenyl) carbodiimide and nickel-titanium alloy according to the mass ratio of (4-5) (2-3) (1-2).
By adopting the technical scheme, the auxiliary agent is prepared by compounding three components of modified sodium polyacrylate, N, N '-di (2, 6-diisopropylphenyl) carbodiimide and nickel-titanium alloy, and the proportion of the three components is adjusted so that the proportion of the three components is optimal, and the N, N' -di (2, 6-diisopropylphenyl) carbodiimide contains groups such as benzene rings, thereby being convenient for improving the heat resistance of the polyolefin composite material, improving the hydrolysis resistance of the polyolefin composite material and further improving the water vapor barrier property of the polyolefin composite material; the nickel-titanium alloy has good heat resistance and low water absorption; the modified sodium polyacrylate adopts a self-made mode, and a carbon nano tube, alumina and carbon fiber are sequentially coated on the outer layer of the sodium polyacrylate to form a heat conduction layer; meanwhile, the water-absorbing layer formed by the calcium chloride and the lithium chloride is matched, so that the occurrence of the condition of external expansion of moisture is reduced, the polymethyl methacrylate layer is wrapped later, the compatibility between materials such as sodium polyacrylate and polyolefin is improved, the compatibility with other raw materials in the polyolefin composite material is facilitated, and the water vapor barrier property and the heat resistance of the polyolefin composite material are improved.
Preferably, the montmorillonite is modified montmorillonite, and the preparation method of the modified montmorillonite comprises the following steps: mixing absolute ethyl alcohol, water and a silane coupling agent to obtain a buffer solution, adjusting the pH value of the buffer solution, adding montmorillonite into the buffer solution, performing ultrasonic treatment, heating, cooling, centrifuging, washing and drying to obtain the modified montmorillonite.
Through adopting above-mentioned technical scheme, the addition of montmorillonite is convenient for prolong steam infiltration route, simultaneously, adopts silane coupling agent to modify montmorillonite, is convenient for improve the compatibility between montmorillonite and the polyolefin other raw materials, is convenient for mutually supporting with the compatilizer, improves the distribution homogeneity of montmorillonite in polyolefin combined material, and then is convenient for mutually supporting with auxiliary agent, modifier, improves polyolefin combined material's steam separation nature.
Preferably, the silicon carbide is modified silicon carbide, and the preparation method of the modified silicon carbide comprises the following steps: mixing the thermotropic liquid crystal polymer, silicon carbide, carbon fiber and aluminum nitride, melting and extruding, granulating, crushing and grinding to obtain the product.
By adopting the technical scheme, the silicon carbide is high in elastic modulus, the silicon carbide is modified, the thermotropic liquid crystal polymer is wrapped on the outer layer of the silicon carbide, so that the compatibility between the silicon carbide and other raw materials in the polyolefin composite material is improved, the influence of heat on the water vapor barrier property of the polyolefin composite material is reduced, and the heat resistance of the polyolefin composite material is improved.
Preferably, the alumina consists of spherical alumina, fibrous alumina and flaky alumina in the mass ratio of (5-6): (1-2): (3-4).
By adopting the technical scheme, the alumina is compounded from three states of spherical alumina, fibrous alumina and flaky alumina, and the proportion of the three states of alumina is adjusted so that the proportion of the three states of alumina is optimal, wherein the flaky alumina tends to be arranged near the spherical alumina based on Van der Waals force, so that the contact between fillers is more sufficient; the spherical alumina plays a role in guiding, is more beneficial to the formation of a heat conduction network, has good dispersibility and steric hindrance, and can promote the better dispersion of the flaky alumina instead of stacking. The aluminum oxide can induce the boron nitride to be arranged on the surface of the polyolefin composite material, so that a heat conduction network is formed effectively, the heat conductivity of the polyolefin composite material is improved, and the water vapor barrier property of the polyolefin composite material is improved.
Preferably, the antioxidant consists of an antioxidant 1010 and an antioxidant 168 according to the mass ratio of (2-3) to (4-5).
In a second aspect, the present application provides a production process of a polyolefin composite material for a photovoltaic back sheet, which adopts the following technical scheme:
a production process of a polyolefin composite material for a photovoltaic backboard comprises the following steps:
(1) Mixing polyethylene, a light stabilizer, an antioxidant, a compatilizer, an auxiliary agent, an improver, montmorillonite, methyl vinyl phenyl silicone rubber, polyacrylamide resin, aluminum oxide, flaky boron nitride and an ultraviolet absorber to obtain a premix;
(2) Mixing the premix obtained in the step (1), and extruding to obtain an extrudate;
(3) And (3) carrying out calendaring shaping, cooling, trimming and rolling on the extrudate obtained in the step (2) to obtain the finished product.
By adopting the technical scheme, the polyethylene composite material prepared by adopting the production process has better water vapor barrier property and thermal conductivity.
In summary, the present application has the following beneficial effects:
1. according to the polyolefin composite material for the photovoltaic backboard, the auxiliary agent, the modifier and other raw materials are added, and the modified sodium polyacrylate in the auxiliary agent has dryness and is convenient to cooperate with the polyacrylamide resin, so that water vapor passing through the polyolefin composite material is absorbed, and the transmission of part of water vapor can be blocked; the carbon fiber, the octavinyl silsesquioxane and the silicon carbide in the modifier are mutually matched, the carbon fiber and the silicon carbide are mutually matched, so that a heat conduction net structure is formed, on one hand, the water vapor transmission path is convenient to prolong, on the other hand, the water vapor transmission speed is convenient to slow down, the octavinyl silsesquioxane is convenient to improve the distribution uniformity of the carbon fiber and the silicon carbide in the polyolefin composite material, and the octavinyl silsesquioxane is matched with an auxiliary agent, so that the water vapor barrier property of the polyolefin composite material is improved.
2. The modified sodium polyacrylate in the auxiliary agent in the polyolefin composite material for the photovoltaic backboard of the application adopts a self-made mode, active alumina, carbon nano tubes and carbon fibers are wrapped outside the sodium polyacrylate, heat is conveniently led out, the water vapor transmission rate is slowed down, the better sodium polyacrylate is conveniently absorbed, meanwhile, calcium chloride and aluminum chloride are conveniently absorbed, the dryness of the sodium polyacrylate is further improved, polymethyl methacrylate is hydrophobic, the sodium polyacrylate is wrapped outside the polyethylene, the condition that excessive sodium polyacrylate moisture absorption leads to water vapor escape is further reduced, and meanwhile, the water vapor transmission path is prolonged by matching with montmorillonite.
Detailed Description
The present application is described in further detail below with reference to examples.
The present invention will be described more fully hereinafter in order to facilitate an understanding of the present invention. This invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The raw materials of the examples and comparative examples herein are commercially available in general unless otherwise specified.
Examples
Example 1
The polyolefin composite material for the photovoltaic back sheet of the embodiment comprises the following raw materials by weight: 95kg of polyethylene, 1kg of light stabilizer, 1kg of antioxidant, 1kg of compatilizer, 5kg of auxiliary agent, 5kg of modifier, 2kg of montmorillonite, 0.5kg of methyl vinyl phenyl silicone rubber, 1kg of polyacrylamide resin, 10kg of alumina, 5kg of flaky boron nitride and 1kg of ultraviolet absorber. The light stabilizer is bis (2, 6-tetramethyl-4-piperidinyl) sebacate; the ultraviolet absorbent is 2-hydroxy-4-n-octoxybenzophenone; the compatilizer is phthalic anhydride; the montmorillonite is modified montmorillonite, and the preparation method of the modified montmorillonite comprises the following steps: mixing absolute ethyl alcohol, water and a silane coupling agent KH560 according to a mass ratio of 80:10:3, standing for 3 hours at 50 ℃ to obtain a buffer solution, adjusting the pH value of the buffer solution to 5 by adopting acetic acid, adding montmorillonite into the buffer solution, performing ultrasonic dispersion for 2 hours, heating to 80 ℃ for reaction for 6 hours, cooling to room temperature, centrifuging, washing by using absolute ethyl alcohol, and drying for 10 hours in an oven at 100 ℃, wherein the mass concentration of acetic acid is 0.8mol/L; the mass ratio of montmorillonite to buffer solution is 2:50; montmorillonite is sodium montmorillonite; the modifier consists of carbon fiber, octavinyl silsesquioxane and silicon carbide according to the mass ratio of 2:1:4; the alumina consists of spherical alumina, fibrous alumina and flaky alumina according to the mass ratio of 5:1:3; the antioxidant consists of an antioxidant 1010 and an antioxidant 168 according to the mass ratio of 2:4; the auxiliary agent consists of modified sodium polyacrylate, N' -bis (2, 6-diisopropylphenyl) carbodiimide and nickel-titanium alloy according to a mass ratio of 4:2:1; the preparation method of the modified sodium polyacrylate comprises the following steps: mixing sodium polyacrylate, carbon nano tube, water, carbon fiber and active alumina according to the mass ratio of 8:3:20:1:2 to obtain a mixture I, mixing the mixture I with a calcium chloride solution according to the mass ratio of 2:10, washing, drying at 70 ℃ for 4 hours to obtain a mixture II, mixing the mixture II with a lithium chloride solution according to the mass ratio of 2:10, washing, drying at 70 ℃ for 4 hours to obtain a mixture III, mixing sodium dodecyl sulfate and a dispersing agent according to the mass ratio, stirring at 65 ℃, adding the mixture III and potassium persulfate when the solution becomes clear, heating to 90 ℃, adding methyl methacrylate, reacting for 2.5 hours, washing with deionized water, and drying to obtain the product. Wherein the dispersing agent is polyvinyl alcohol.
The production process of the polyolefin composite material for the photovoltaic backboard of the embodiment comprises the following steps:
(1) Mixing polyethylene, a light stabilizer, an antioxidant, a compatilizer, an auxiliary agent, an improver, montmorillonite, methyl vinyl phenyl silicone rubber, polyacrylamide resin, aluminum oxide, flaky boron nitride and an ultraviolet absorber to obtain a premix;
(2) Mixing the premix obtained in the step (1), and extruding to obtain an extrudate; the extrusion temperature was 200 ℃; the rotating speed of the extrusion rod is 280r/min;
(3) And (3) carrying out calendaring shaping, cooling, trimming and rolling on the extrudate obtained in the step (2) to obtain the finished product.
Example 2
The polyolefin composite material for photovoltaic back sheet of this example is different from example 1 in that: the material comprises the following raw materials by weight: polyethylene 100, light stabilizer 2, antioxidant 2, compatilizer 2, auxiliary agent 8, modifier 8, montmorillonite 3, methyl vinyl phenyl silicone rubber 1, polyacrylamide resin 2kg, alumina 15kg, flaky boron nitride 10kg, and ultraviolet absorber 2kg. The modifier consists of carbon fiber, octavinyl silsesquioxane and silicon carbide according to the mass ratio of 3:2:5; the alumina consists of spherical alumina, fibrous alumina and flaky alumina according to the mass ratio of 6:2:4; the antioxidant consists of an antioxidant 1010 and an antioxidant 168 according to a mass ratio of 3:5. The auxiliary agent consists of modified sodium polyacrylate, N' -di (2, 6-diisopropylphenyl) carbodiimide and nickel-titanium alloy according to a mass ratio of 5:3:2.
Example 3
The polyolefin composite material for photovoltaic back sheet of this example is different from example 2 in that: the carbon fiber is modified carbon fiber, and the preparation method of the modified carbon fiber comprises the following steps: s1, mixing carbon fibers and acetone according to a mass ratio of 1:100, adding ammonia water, performing ultrasonic treatment to obtain a dispersion liquid, dropwise adding a zinc gluconate, magnesium gluconate and acetone mixed solution into the dispersion liquid, stirring for 2 hours at 55 ℃, separating, washing and drying to obtain carbon fibers I; wherein the mass ratio of the carbon fiber to the ammonia water is 1:5; the mass ratio of the carbon fiber to the mixed solution is 1:150; the mass ratio of zinc gluconate to magnesium gluconate to acetone in the mixed solution is 2:1:20; s2, mixing the carbon fiber I, graphene oxide and N, N-dimethylformamide according to a mass ratio of 3:5:60, fully stirring for 3 hours, performing ultrasonic dispersion for 2 hours, adding polyvinylpyrrolidone and vitamin C, heating to 105 ℃ in a water bath, reacting for 2 hours, then washing with distilled water, and performing vacuum drying to obtain carbon fiber II; wherein the mass ratio of graphene oxide to polyvinylpyrrolidone to vitamin C is 5:2:5; s3, mixing and dissolving 4, 4-diaminodiphenyl ether and N, N-dimethylformamide according to a mass ratio of 4:50 to obtain a mixed solution, adding carbon fiber II, performing ultrasonic dispersion for 2 hours, introducing nitrogen, completely replacing air, adding pyromellitic anhydride, reacting under the condition of introducing nitrogen, placing in a drying oven, gradually heating, keeping the heating rate at 5 ℃/min, and preserving the temperature for 1 hour at 150 ℃ to obtain the composite material. Wherein the mass ratio of the carbon fiber II to the mixed solution is 2:10; the mass ratio of the 4, 4-diaminodiphenyl ether to the pyromellitic anhydride is 1:1.
Example 4
The polyolefin composite material for photovoltaic back sheet of this example is different from example 3 in that: the carbon fiber in the step S1 is a pretreated carbon fiber, and the preparation method of the pretreated carbon fiber comprises the following steps: mixing water and ethanol according to a mass ratio of 1:1, adding ammonia water, stirring for 2 hours at 300r/min to obtain a treatment liquid, putting carbon fibers into the treatment liquid, standing for 10min, dripping ethyl orthosilicate, taking out the treated carbon fibers, washing, drying at 100 ℃, then mixing with hexamethyldisilazane, and drying at 100 ℃ to obtain the carbon fiber. Wherein the mass ratio of the carbon fiber to the treatment fluid is 1:10; the mass ratio of the tetraethoxysilane to the carbon fiber is 0.5:1, and the mass ratio of the hexamethyldisilazane to the treated carbon fiber is 1:50.
Example 5
The polyolefin composite material for photovoltaic back sheet of this example is different from example 4 in that: the silicon carbide is modified silicon carbide, and the preparation method of the modified silicon carbide comprises the following steps: mixing, melting and extruding the thermotropic liquid crystal polymer, silicon carbide, carbon fiber and aluminum nitride according to the mass ratio of 5:2:1:1, granulating, crushing and grinding to obtain the thermotropic liquid crystal polymer. Wherein the screw rotation speed is 350r/min, and the extrusion temperature is 320 ℃.
Example 6
The polyolefin composite material for photovoltaic back sheet of this example is different from example 1 in that: the alumina consists of spherical alumina, fibrous alumina and flaky alumina in the mass ratio of 1 to 1.
Example 7
The polyolefin composite material for photovoltaic back sheet of this example is different from example 1 in that: the alumina is spherical alumina.
Comparative example
Comparative example 1
The polyolefin composite material for photovoltaic back sheet of this comparative example is different from example 1 in that: no modifier was added.
Comparative example 2
The polyolefin composite material for photovoltaic back sheet of this comparative example is different from example 1 in that: no auxiliary agent was added.
Comparative example 3
The polyolefin composite material for photovoltaic back sheet of this comparative example is different from example 1 in that: the auxiliary agent consists of sodium polyacrylate, N' -di (2, 6-diisopropylphenyl) carbodiimide and nickel-titanium alloy according to a mass ratio of 4:2:1.
Comparative example 4
The polyolefin composite material for photovoltaic back sheet of this comparative example is different from example 1 in that: the auxiliary agent consists of modified sodium polyacrylate and N, N' -di (2, 6-diisopropylphenyl) carbodiimide according to a mass ratio of 1:1.
Comparative example 5
The polyolefin composite material for photovoltaic back sheet of this comparative example is different from example 1 in that: the modifier consists of carbon fiber and silicon carbide in the mass ratio of 1 to 1.
Performance test
Water vapor barrier performance test: the polyolefin composite materials for photovoltaic back sheets prepared in examples 1 to 7 and comparative examples 1 to 5 were tested for water vapor transmission rate according to the test method in GB/T21529-2008 "method for measuring Water vapor transmission Rate of Plastic films and sheets for electrolytic Sensors", test conditions were 38 ℃,90% RH, and the test results are shown in Table 1.
Breakdown voltage performance test: polyolefin composite materials for photovoltaic back panels prepared in examples 1 to 7 and comparative examples 1 to 5 were prepared according to GB/T1408.1-2016 (insulating Material Electrical Strength test method part 1): the detection method in the industrial frequency lower test detects the breakdown voltage of the polyolefin composite material, and the test size is as follows: 100 mm. 100mm, the detection results are shown in Table 1.
Heat resistance test: the polyolefin composite materials for photovoltaic back sheets prepared in examples 1 to 7 were subjected to constant temperature at 130℃for 30 minutes, and the state of the polyolefin composite materials was observed, and the detection results are shown in Table 1.
TABLE 1 results of Performance test of polyolefin composite materials for photovoltaic back sheets of examples 1-7 and comparative examples 1-5
As can be seen by combining the data in table 1, the polyolefin composite materials of examples 1-7 produced photovoltaic back sheets having lower water vapor transmission rates and good heat resistance.
The present embodiment is merely illustrative of the present application and is not limiting of the present application, and modifications may be made to the present embodiment without creative contribution as needed by a person skilled in the art after reading the present specification.
Claims (10)
1. The polyolefin composite material for the photovoltaic backboard is characterized by being mainly prepared from the following raw materials in parts by weight: 95-100 parts of polyethylene, 1-2 parts of light stabilizer, 1-2 parts of antioxidant, 1-2 parts of compatilizer, 5-8 parts of auxiliary agent, 5-8 parts of modifier, 2-3 parts of montmorillonite, 0.5-1 part of methyl vinyl phenyl silicone rubber, 1-2 parts of polyacrylamide resin, 10-15 parts of alumina, 5-10 parts of flaky boron nitride and 1-2 parts of ultraviolet absorber, wherein the modifier comprises carbon fiber, octavinyl silsesquioxane and silicon carbide, the auxiliary agent comprises modified sodium polyacrylate, N' -bis (2, 6-diisopropylphenyl) carbodiimide and nickel-titanium alloy, and the preparation method of the modified sodium polyacrylate comprises the following steps: mixing sodium polyacrylate, carbon nanotube, water, carbon fiber and active alumina to obtain a first mixture, mixing the first mixture with a calcium chloride solution, washing, drying to obtain a second mixture, mixing the second mixture with a lithium chloride solution, washing, drying to obtain a third mixture, mixing sodium dodecyl sulfate with a dispersing agent, adding the third mixture and potassium persulfate, heating, adding methyl methacrylate, reacting, washing, and drying to obtain the product.
2. The polyolefin composite material for a photovoltaic back sheet according to claim 1, wherein the carbon fiber is a modified carbon fiber, and the preparation method of the modified carbon fiber comprises the following steps: s1, mixing carbon fibers with acetone, adding ammonia water, performing ultrasonic treatment to obtain a dispersion liquid, dropwise adding zinc gluconate, magnesium gluconate and acetone mixed liquid into the dispersion liquid, stirring, separating, washing and drying to obtain carbon fibers I; s2, mixing the carbon fiber I, graphene oxide and N, N-dimethylformamide, performing ultrasonic treatment, adding polyvinylpyrrolidone and vitamin C, heating in a water bath, reacting, cleaning, and performing vacuum drying to obtain a carbon fiber II; s3, mixing and dissolving 4, 4-diaminodiphenyl ether and N, N-dimethylformamide to obtain a mixed solution, adding carbon fiber II, dispersing, introducing nitrogen, adding pyromellitic anhydride, reacting, and drying to obtain the composite material.
3. The polyolefin composite material for a photovoltaic back sheet according to claim 2, wherein the carbon fiber in the step S1 is a pretreated carbon fiber, and the preparation method of the pretreated carbon fiber comprises the following steps: mixing water and ethanol, adding ammonia water to obtain a treatment solution, putting carbon fibers into the treatment solution, dripping tetraethoxysilane, taking out the treated carbon fibers, washing, drying, then mixing with hexamethyldisilazane, and drying to obtain the product.
4. The polyolefin composite material for the photovoltaic back sheet according to claim 1, wherein the modifier consists of carbon fiber, octavinyl silsesquioxane and silicon carbide according to the mass ratio of (2-3): (1-2): (4-5).
5. The polyolefin composite material for a photovoltaic back sheet according to claim 1, wherein the auxiliary agent consists of modified sodium polyacrylate, N' -bis (2, 6-diisopropylphenyl) carbodiimide and nickel-titanium alloy in a mass ratio of (4-5): (2-3): (1-2).
6. The polyolefin composite material for a photovoltaic back sheet according to claim 1, wherein the montmorillonite is a modified montmorillonite, and the preparation method of the modified montmorillonite comprises the following steps: mixing absolute ethyl alcohol, water and a silane coupling agent to obtain a buffer solution, adjusting the pH value of the buffer solution, adding montmorillonite into the buffer solution, performing ultrasonic treatment, heating, cooling, centrifuging, washing and drying to obtain the modified montmorillonite.
7. The polyolefin composite material for a photovoltaic back sheet according to claim 1, wherein the silicon carbide is modified silicon carbide, and the preparation method of the modified silicon carbide comprises the following steps: mixing the thermotropic liquid crystal polymer, silicon carbide, carbon fiber and aluminum nitride, melting and extruding, granulating, crushing and grinding to obtain the product.
8. The polyolefin composite material for a photovoltaic back sheet according to claim 1, wherein the alumina is composed of spherical alumina, fibrous alumina, and flaky alumina in a mass ratio of (5-6): (1-2): (3-4).
9. The polyolefin composite material for a photovoltaic back sheet according to claim 1, wherein the antioxidant consists of an antioxidant 1010 and an antioxidant 168 in a mass ratio of (2-3): (4-5).
10. A process for producing a polyolefin composite for a photovoltaic backsheet according to any one of claims 1 to 9, comprising the steps of:
(1) Mixing polyethylene, a light stabilizer, an antioxidant, a compatilizer, an auxiliary agent, an improver, montmorillonite, methyl vinyl phenyl silicone rubber, polyacrylamide resin, aluminum oxide, flaky boron nitride and an ultraviolet absorber to obtain a premix;
(2) Mixing the premix obtained in the step (1), and extruding to obtain an extrudate;
(3) And (3) carrying out calendaring shaping, cooling, trimming and rolling on the extrudate obtained in the step (2) to obtain the finished product.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107554019A (en) * | 2017-08-22 | 2018-01-09 | 嘉兴市高正高分子材料有限公司 | It is a kind of it is three-layer co-extruded go out polyethylene film and preparation method thereof |
| CN110077073A (en) * | 2019-04-03 | 2019-08-02 | 乐凯胶片股份有限公司 | A kind of polyolefin film, preparation method and solar cell backboard |
| CN115714147A (en) * | 2022-11-22 | 2023-02-24 | 福斯特(嘉兴)新材料有限公司 | Photovoltaic back sheet and photovoltaic module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107554019A (en) * | 2017-08-22 | 2018-01-09 | 嘉兴市高正高分子材料有限公司 | It is a kind of it is three-layer co-extruded go out polyethylene film and preparation method thereof |
| CN110077073A (en) * | 2019-04-03 | 2019-08-02 | 乐凯胶片股份有限公司 | A kind of polyolefin film, preparation method and solar cell backboard |
| CN115714147A (en) * | 2022-11-22 | 2023-02-24 | 福斯特(嘉兴)新材料有限公司 | Photovoltaic back sheet and photovoltaic module |
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