CN114864719B - Solar cell backboard with high weather resistance and high water vapor barrier property and preparation method thereof - Google Patents
Solar cell backboard with high weather resistance and high water vapor barrier property and preparation method thereof Download PDFInfo
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- CN114864719B CN114864719B CN202210386471.5A CN202210386471A CN114864719B CN 114864719 B CN114864719 B CN 114864719B CN 202210386471 A CN202210386471 A CN 202210386471A CN 114864719 B CN114864719 B CN 114864719B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 63
- 230000004888 barrier function Effects 0.000 title claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000002313 adhesive film Substances 0.000 claims abstract description 92
- 229920002799 BoPET Polymers 0.000 claims abstract description 88
- 229920001328 Polyvinylidene chloride Polymers 0.000 claims abstract description 75
- 239000005033 polyvinylidene chloride Substances 0.000 claims abstract description 75
- 239000002131 composite material Substances 0.000 claims abstract description 74
- 238000004891 communication Methods 0.000 claims abstract description 21
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 46
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- 238000010438 heat treatment Methods 0.000 claims description 32
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 30
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 claims description 29
- SXFJDZNJHVPHPH-UHFFFAOYSA-N 3-methylpentane-1,5-diol Chemical compound OCCC(C)CCO SXFJDZNJHVPHPH-UHFFFAOYSA-N 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 27
- 238000005266 casting Methods 0.000 claims description 25
- 239000012528 membrane Substances 0.000 claims description 23
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- 239000002994 raw material Substances 0.000 claims description 17
- 238000001035 drying Methods 0.000 claims description 16
- 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 15
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 15
- 238000009832 plasma treatment Methods 0.000 claims description 15
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 13
- 229910052797 bismuth Inorganic materials 0.000 claims description 13
- 239000002253 acid Substances 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 12
- 238000007731 hot pressing Methods 0.000 claims description 12
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 12
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000013329 compounding Methods 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 9
- 239000001361 adipic acid Substances 0.000 claims description 8
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- 150000002009 diols Chemical class 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 239000011265 semifinished product Substances 0.000 claims description 6
- BSYKBLKUYLXUCJ-UHFFFAOYSA-N 2-(2-hydroxyethoxy)ethanol pyrrole-2,5-dione Chemical compound C(COCCO)O.C1(C=CC(N1)=O)=O BSYKBLKUYLXUCJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
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- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- JGUQDUKBUKFFRO-CIIODKQPSA-N dimethylglyoxime Chemical compound O/N=C(/C)\C(\C)=N\O JGUQDUKBUKFFRO-CIIODKQPSA-N 0.000 claims description 4
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 claims description 3
- 239000004715 ethylene vinyl alcohol Substances 0.000 claims description 3
- 239000012760 heat stabilizer Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000005809 transesterification reaction Methods 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 2
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- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 45
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 24
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- 230000005540 biological transmission Effects 0.000 description 14
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- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
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- 238000010998 test method Methods 0.000 description 2
- 239000005341 toughened glass Substances 0.000 description 2
- PEEHTFAAVSWFBL-UHFFFAOYSA-N Maleimide Chemical compound O=C1NC(=O)C=C1 PEEHTFAAVSWFBL-UHFFFAOYSA-N 0.000 description 1
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- 238000010248 power generation Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
- H01L31/049—Protective back sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
- B32B3/085—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts spaced apart pieces on the surface of a layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/544—Silicon-containing compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/08—Oxygen-containing compounds
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The application relates to the technical field of solar module preparation, in particular to a solar cell backboard with high weather resistance and high water vapor barrier and a preparation method thereof. A solar cell backboard with high weather resistance and high water vapor barrier comprises a first modified PET film, a first adhesive film, a PVDC composite film, a second adhesive film and a second modified PET film, wherein the first adhesive film and the second adhesive film are respectively compounded on the upper surface and the lower surface of the PVDC composite film; the first modified PET film is compounded on the surface of the first adhesive film, which is opposite to the PVDC composite film; the second modified PET film is compounded on the surface of the second adhesive film, which is opposite to the PVDC composite film; the PVDC composite film is integrally formed with a plurality of communication holes; the PVDC composite film is compounded with a plurality of gas barrier films; the number of the gas barrier films is twice that of the communication holes; the two gas barrier films are respectively compounded on the upper surface and the lower surface of the PVDC composite film. The coating has better weather resistance and water vapor barrier property.
Description
Technical Field
The application relates to the technical field of solar module preparation, in particular to a solar cell backboard with high weather resistance and high water vapor barrier and a preparation method thereof.
Background
With the increasing prominence of energy crisis and resource shortage, the energy and environmental protection problems are increasingly emphasized by various countries, and this results in the utilization and development of new energy to be one of the great heat of research and development in the world nowadays. Among the many cleanable energy sources, solar energy has been the subject of intense development by various nations and researchers.
The key core for solar energy utilization is as follows: a solar cell module. The solar cell module can convert solar energy into electric energy for use, and has the advantages of relieving the tension of the electric energy and reducing the dependence on fossil fuel power generation, thereby attracting attention. The popularization of solar cell modules has been limited in the past by solar material development. Currently, solar cell modules, which are generally rigid, have limited applicable application scenarios.
A solar cell module in the related art comprises a solar cell front plate, an EVA adhesive film layer, a solar cell piece, an EVA adhesive film layer and a solar cell back plate, wherein the solar cell front plate is packaged on the upper surface of the solar cell piece through the EVA adhesive film layer in a hot-pressing mode, and the solar cell back plate is packaged on the lower surface of the solar cell piece through the EVA adhesive film layer in a hot-pressing mode. The solar cell backboard has great influence on the overall mechanical strength, the waterproof performance and the service life of the solar cell board, and the quality of the solar cell backboard can directly influence the service life of the solar cell board.
The solar cell backboard is mainly selected according to the use situation of the solar cell module. Currently, a solar cell backboard comprises a conventional toughened glass plate, a composite flexible plate prepared from a polymer film and a semi-flexible composite plate prepared from the toughened glass plate and the polymer film.
With respect to the solar cell back sheet in the above related art, the applicant found that the following problems exist: although the solar cell back sheet in the prior art has certain flexibility, the solar cell back sheet is influenced by the solar cell back sheet material, so that the weather resistance and the water vapor barrier property of the solar cell module are relatively poor, and the service life of the solar cell module is relatively low.
Disclosure of Invention
In order to solve the problem that the service life of an existing solar cell module is relatively low, the application provides a solar cell backboard with high weather resistance and high water vapor barrier type and a preparation method thereof.
In a first aspect, the application provides a solar cell backboard with high weather resistance and high water vapor barrier, which is realized by the following technical scheme:
the solar cell backboard with high weather resistance and high water vapor barrier comprises a first modified PET film, a first adhesive film, a PVDC composite film, a second adhesive film and a second modified PET film, wherein the first adhesive film is compounded on the upper surface of the PVDC composite film; the second adhesive film is compounded on the lower surface of the PVDC compound film; the first modified PET film is compounded on the surface of the first adhesive film, which is opposite to the PVDC composite film; the second modified PET film is compounded on the surface of the second adhesive film, which is opposite to the PVDC composite film; the PVDC composite film is integrally formed with a plurality of communication holes; the communication holes are uniformly distributed in a lattice mode; the PVDC composite film is compounded with a plurality of gas barrier films; the number of the gas barrier films is twice that of the communication holes; the two gas barrier films are respectively compounded on the upper surface and the lower surface of the PVDC composite film, and the single communication hole is sealed; the first modified PET film and the second modified PET film are prepared from the following raw materials: 100 parts of film-grade PET resin, 8-10 parts of PEN resin, 2-3 parts of compatilizer, 3-5 parts of heat stabilizer, 3-5 parts of ultraviolet resistance agent and 3-8 parts of filler compound.
The gas barrier membrane compounded by the PVDC composite membrane in the application can ensure the gas barrier performance of the application and simultaneously ensure the bonding stability of the PVDC composite membrane and the first modified PET membrane and the second modified PET membrane, so that the overall gas barrier performance and weather resistance of the application are ensured, and the service life of the application is prolonged. In addition, the first modified PET film and the second modified PET film are formed by adopting PEN resin, a compatilizer and film-grade PET resin through tape casting and stretching, so that the overall mechanical strength and gas barrier property are improved, and the overall mechanical strength and gas barrier property of the film are further ensured. The heat stabilizer can ensure the weather resistance and the service life of the first modified PET film and the second modified PET film, and the ultraviolet resistance and the service life of the first modified PET film and the second modified PET film can be ensured by the ultraviolet resistance agent. The filler compound can make up for defects and gaps among molecular chains, and can improve the integral mechanical strength and gas barrier property of the application.
Preferably, the diameter of the communication hole is 12-18mm; the porosity of the PVDC composite film is 20-30%; the diameter of the gas barrier membrane is 1.25-1.4 times of the diameter of the communicating hole; the gas barrier membrane is an EVOH film.
By adopting the technical scheme, the PVDC composite film, the first modified PET film and the second modified PET film can be ensured to be bonded stably while the operation flow is standardized, and the PVDC composite film has good gas barrier property.
Preferably, the upper surface and the lower surface of the PVDC composite film are subjected to low-temperature plasma treatment to form a tackifying stable layer; the low-temperature plasma treatment method comprises the steps of ultrasonically cleaning the upper and lower surfaces of a PVDC composite membrane by adopting a 5% sodium hydroxide aqueous solution, ultrasonically cleaning the upper and lower surfaces of the PVDC composite membrane by adopting deionized water, drying, and performing low-temperature plasma treatment by adopting oxygen for 10-20min under the conditions of power of 60-70W, temperature of 0-4 ℃ and pressure of 10-20 Pa.
Through adopting above-mentioned technical scheme, can improve PVDC complex film and the bonding stability of first modified PET membrane, second modified PET membrane and PVDC complex film and gas barrier membrane's bonding stability, and then guarantee that this application is whole to have better gas barrier property, weatherability and comparatively permanent life.
Preferably, the first modified PET film and the second modified PET film are prepared from the following raw materials: 100 parts of film grade PET resin, 8-10 parts of PEN resin, 2-3 parts of TPEE-7246, 1 part of antioxidant 1010, 1.6 parts of antioxidant 626, 0.8 part of antioxidant 2246A, 2 parts of UV-9, 2.4 parts of UV-944 and 6-8 parts of filler compound.
The modified PET film prepared by optimizing the formula composition has good gas barrier property, weather resistance, ageing resistance and ultraviolet resistance, so that the whole PET film has good gas barrier property, weather resistance and longer service life.
Preferably, the filler compound comprises nano titanium dioxide, T-ZnO whisker and KH550 siloxane; the mass ratio of the nano titanium dioxide to the T-ZnO whisker to the KH550 siloxane is 10:1: (1-2).
Through adopting above-mentioned technical scheme, can improve the gas barrier property, the ultraviolet resistance and the pliability of modified PET membrane, and then guarantee that this application is whole to have better gas barrier property, weatherability and comparatively permanent life.
Preferably, the preparation method of the first modified PET film and the second modified PET film comprises the following steps:
step one, drying PEN resin, film-grade PET resin and TPEE-7246 for later use;
placing the PEN resin, the film-grade PET resin, the TPEE-7246, the antioxidant 1010, the antioxidant 626, the antioxidant 2246A, UV-9, the UV-944 and the filler compound which are accurately measured in the step one into a high-speed dispersing kettle, uniformly dispersing, adding the mixture into a double-screw extruder, extruding and granulating, water-cooling, and granulating to obtain modified PET granules with the granularity of 1.5-2.5 mm;
Step three: the modified PET granules are placed at 100 ℃ and dried for 4 hours for standby;
and step four, adding the dried modified PET granules into a double-screw extruder for extrusion, conveying the obtained melt into a casting machine for casting to form a film, wherein the surface temperature of a casting roller is 35-40 ℃, carrying out bidirectional stretching on the obtained casting film, and the longitudinal and transverse stretching ratios of the obtained casting film are 2.8-3.2, cooling the biaxially stretched film to normal temperature through a cooling roller, and rolling to obtain the finished PET film.
By adopting the technical scheme, the preparation method is relatively simple, is convenient for mass production, has mature production process and relatively low production cost.
Preferably, the first adhesive film and the second adhesive film are prepared from the following raw materials: HDI, MDI-50, MDI, 1, 6-hexanediol, 1, 4-butanediol, 3-methyl-1, 5-pentanediol, an imide-modified polyol having a molecular weight of 2000, a polyhexamethylene carbonate glycol having a molecular weight of 2000, an antioxidant, bismuth octodecanoate, nano barium sulfate powder; the molar weight ratio of the HDI to the MDI-50 to the MDI is 1:8.2:0.8; the total content of hydroxyl groups in the 1, 6-hexanediol, 1, 4-butanediol and 3-methyl-1, 5-pentanediol is 5 times that in the imide modified polyol with the molecular weight of 2000 and the polyhexamethylene carbonate glycol with the molecular weight of 2000; the total content of hydroxyl groups in the 1, 6-hexanediol, 1, 4-butanediol, 3-methyl-1, 5-pentanediol, imide modified polyol with the molecular weight of 2000 and polyhexamethylene carbonate glycol with the molecular weight of 2000 is 1.02-1.05 times of that of isocyanate groups in HDI, MDI-50 and MDI; the molar ratio of hydroxyl groups in the imide modified polyol with the molecular weight of 2000 and the polyhexamethylene carbonate glycol with the molecular weight of 2000 is (3-4): 1, a step of; the imide modified polyol with the molecular weight of 2000 is prepared from maleimide-diethylene glycol, adipic acid, 1, 6-hexanediol and 3-methyl-1, 5-pentanediol.
By adopting the technical scheme, the TPU hot melt adhesive with good mechanical properties and weather resistance can be prepared, the bonding stability of the first modified PET film and the PVDC composite film and the bonding stability of the second modified PET film and the PVDC composite film can be ensured, and further the overall mechanical strength, weather resistance and service life can be ensured.
Preferably, the preparation method of the first adhesive film and the second adhesive film comprises the following steps:
firstly, preparing an imide modified polyol with a molecular weight of 2000, feeding, namely adding adipic acid, 1, 6-hexanediol and 1, 4-butanediol which are accurately measured into a reaction kettle, uniformly mixing for later use, heating to 130-135.0 ℃, reacting until effluent is obtained, heating to 220-230 ℃, carrying out transesterification for 2.0h, detecting an acid value, if the acid value is higher than 25mgKOH/g, continuing to react until the acid value is lower than 25mgKOH/g, and vacuumizing after the acid value is lower than 25mgKOH/g, and continuously reacting until the OH-value is controlled to be 56+/-3, wherein the imide modified polyol with a molecular weight of 2000;
feeding, namely feeding accurately-metered 3-methyl-1, 5-pentanediol, 1, 6-hexanediol and 1, 4-butanediol into a first material tank of a double-screw extruder, feeding accurately-metered polyhexamethylene carbonate glycol with molecular weight of 2000 and imide modified polyol into a second material tank of the double-screw extruder, uniformly stirring MDI, MDI-50, HDI, bismuth octodecanoate, an antioxidant and nano barium sulfate powder, and feeding into a third material tank of the double-screw extruder;
Discharging the materials from the extruder by using a gear pump at the barrel section temperature of 220-230 ℃, granulating by water cooling, drying the obtained granules in a fluidized bed dryer at 80-85 ℃ for 10-12min until the water content is less than 0.03%, and then performing thermal adjustment for 20-24h at 80 ℃ to obtain TPU granules;
and step four, adopting TPU granules in the step three to cast into a film, and obtaining a finished adhesive film.
By adopting the technical scheme, the preparation method is relatively simple, is convenient for mass production, has mature production process and relatively low production cost.
Preferably, the surface of the gas barrier membrane, which is opposite to the PVDC composite membrane, is compounded with a self-healing reinforced film; the self-healing reinforced film is prepared from the following raw materials: HDI, MDI-50, MDI, 1, 6-hexanediol, 1, 4-butanediol, 3-methyl-1, 5-pentanediol, a mixture of polyols, an antioxidant, bismuth octodecanoate and nano barium sulfate powder; the molar ratio of the HDI to the MDI-50 to the MDI is 1.2:8.0:0.8; the polyatomic alcohol mixture is imide modified polyatomic alcohol with the molecular weight of 2000, polyhexamethylene carbonate glycol with the molecular weight of 2000 and dimethylglyoxime; the molar ratio of hydroxyl groups in the imide modified polyol with the molecular weight of 2000, the polyhexamethylene carbonate diol with the molecular weight of 2000 and the dimethylene carbonate diol with the molecular weight of 2000 is 4:1:5, a step of; the total content of hydroxyl groups in the 1, 6-hexanediol, 1, 4-butanediol and 3-methyl-1, 5-pentanediol is 4.5 times of that in the polyol mixture; the total content of hydroxyl groups in the mixture of the 1, 6-hexanediol, the 1, 4-butanediol, the 3-methyl-1, 5-pentanediol and the polyol is 1.02 to 1.05 times of that of isocyanate groups in HDI, MDI-50 and MDI; the imide modified polyol with the molecular weight of 2000 is prepared from maleimide-diethylene glycol, adipic acid, 1, 6-hexanediol and 3-methyl-1, 5-pentanediol.
Through adopting above-mentioned technical scheme, can further guarantee the steam separation performance of this application, and then prolong the life of this application.
In a second aspect, the preparation method of the solar cell backboard with high weather resistance and high water vapor barrier is realized through the following technical scheme:
a preparation method of a solar cell backboard with high weather resistance and high water vapor barrier comprises the following steps:
step one, preparing a first modified PET film, a first adhesive film, a second adhesive film and a second modified PET film, and carrying out low-temperature plasma treatment on the surfaces of PVDC composite films;
step two, the upper surface and the lower surface of the PVDC composite film subjected to surface low-temperature plasma treatment are respectively compounded with a first adhesive film and a second adhesive film;
step three, compounding a first modified PET film on the surface of the first adhesive film, compounding a second modified PET film on the surface of the second adhesive film, and carrying out hot pressing compounding to obtain a semi-finished product;
step four, heat treatment: the semi-finished product is sent into a heat treatment furnace, heated to 80-85 ℃ at a heating rate of 0.8-1.0 ℃/min, kept for 60-80s, heated to 100-125 ℃ at a heating rate of 0.5-0.65 ℃/min, kept for 5-7min, naturally cooled and rolled to obtain the finished backboard.
By adopting the technical scheme, the preparation method is relatively simple and is convenient for mass production. In addition, the first modified PET film, the second modified PET film, the first adhesive film and the second adhesive film can be commissioned for production, and the production cost of the production process is relatively low, so that the production process is convenient to market and sell.
In summary, the present application has the following advantages:
1. the application has better weather resistance and water vapor barrier property, and the service life is relatively long.
2. The preparation method is relatively simple, is convenient for mass production, and has relatively low production cost.
Drawings
Fig. 1 is a schematic view of the overall structure in embodiment 1 in the present application.
Fig. 2 is a partial enlarged view of fig. 1 at a.
Fig. 3 is a schematic view of the overall structure in embodiment 2 in the present application.
Fig. 4 is a partial enlarged view of fig. 3 at B.
Fig. 5 is a schematic view of the overall structure in comparative example 9 in the present application.
In the figure, 1, a first modified PET film; 2. a first adhesive film; 3. PVDC composite film; 30. a gas barrier membrane; 300. a tackifying stabilization layer; 301. a self-healing reinforced film; 31. a communication hole; 4. a second adhesive film; 5. and a second modified PET film.
Detailed Description
The present application is described in further detail below with reference to the drawings, comparative examples and examples.
Preparation example
Preparation example 1
The modified PET film is prepared from the following raw materials in parts by weight: 100 parts of film grade PET resin (film grade PET DuPont U.S. FC 51), 8 parts of PEN resin (brand TN-8050SC, di human Co.), 2 parts of TPEE-7246, 1 part of antioxidant 1010, 1.6 parts of antioxidant 626, 0.8 part of antioxidant 2246A, 2 parts of UV-9, 2.4 parts of UV-944, 6.15 parts of nano-titanium dioxide, 0.62 part of T-ZnO whisker, 1.23 parts of KH550 siloxane.
The preparation method of the modified PET film comprises the following steps:
step one, drying preparation work of PEN resin, PET resin and TPEE-7246 and surface treatment work of nano titanium dioxide and T-ZnO whisker;
drying preparation of PEN resin, PET resin, TPEE-7246:
weighing 160g of PEN resin, and drying for 4 hours at 100 ℃ for later use;
weighing 2000g of PET resin, and drying at 80 ℃ for 4 hours for later use;
weighing 40g of TPEE-7246, and drying at 80 ℃ for 4 hours for later use;
surface treatment work of nano titanium dioxide and T-ZnO whisker: preparing an acetone solution of KH550 siloxane with the concentration of 3.0g/L, placing nano titanium dioxide and T-ZnO whiskers into the acetone solution of KH550 siloxane, performing ultrasonic treatment for 30min, draining, washing with deionized water, and drying for later use;
putting 160g of PEN resin, 2000g of PET resin and 40g of TPEE-7246 which are dried in the first step into a high-speed dispersing kettle, dispersing for 10min at 350rpm, opening the high-speed dispersing kettle, naturally cooling to room temperature, adding 123.1g of nano titanium dioxide, 12g of T-ZnO whisker and 24.6g of KH550 siloxane coupling agent which are subjected to surface treatment in the first step, and mixing and dispersing for 30min at 400rpm to obtain a mixture;
Step three, adding the mixture obtained in the step two into a double-screw extruder for extrusion granulation, wherein the extrusion temperature is divided into seven temperature areas, namely 255-258 ℃,265-268 ℃,275-278 ℃,283-285 ℃,284-286 ℃,284-286 ℃, die temperature 289.5 ℃, plasticizing temperature 298.2 ℃, water cooling and granulating to obtain modified PET granules with the granularity of 2.0-2.5 mm;
step four, the modified PET granules obtained in the step three are sent into a baking oven, the temperature of the baking oven is controlled at 100 ℃, and the drying is carried out for 4 hours, so that the moisture of the modified PET granules is lower than 0.5 percent for standby;
step five, adding the modified PET granules dried in the step four into a double-screw extruder for extrusion, wherein the extrusion temperature is divided into seven temperature areas, namely 255-260 ℃,265-270 ℃,275-280 ℃,285-288 ℃,284-286 ℃,284-286 ℃, conveying extruded molten liquid materials into a casting machine for casting and forming films, sequentially passing the extruded molten liquid materials through 5 casting rolls, wherein the surface Wen Fenbei of the casting rolls is 120 ℃, 100 ℃, 80 ℃, 60 ℃, 40 ℃, and the casting films are conveyed into a biaxial stretching system for biaxial stretching under the traction of a traction roll, the oven temperature is 160 ℃, the longitudinal and transverse stretching ratios are 3.0, the stretched films are cooled to normal temperature through a cooling roll, and sequentially passing the stretched films through five cooling rolls, wherein the temperature of the cooling rolls is 60 ℃, 50 ℃, 40 ℃, 35 ℃ and normal temperature, and winding to obtain the modified PET films;
Cutting the modified PET film obtained in the step five into a modified PET film sheet of 812 x 675mm, carrying out heat treatment, conveying the modified PET film sheet into a heat treatment furnace, heating to 65 ℃ at a heating rate of 0.78-0.8 ℃/min, preserving heat for 120s, heating to 78 ℃ at a heating rate of 0.6 ℃/min, preserving heat for 10min, heating to 40 ℃ at a cooling rate of 2.0 ℃/min, and naturally cooling and rolling to obtain a finished modified PET substrate with the thickness of 100+/-1 micrometers.
Preparation example 2
The preparation example 2 is different from the preparation example 1 in that the modified PET film is prepared from the following raw materials in parts by weight: 100 parts of film grade PET resin (film grade PET DuPont U.S. FC 51), 10 parts of PEN resin (brand TN-8050SC, di human Co.), 2.5 parts of TPEE-7246, 1 part of antioxidant 1010, 1.6 parts of antioxidant 626, 0.8 part of antioxidant 2246A, 2 parts of UV-9, 2.4 parts of UV-944, 6.15 parts of nano titanium dioxide, 0.62 part of T-ZnO whisker, 1.23 parts of KH550 siloxane.
Preparation example 3
The preparation example 3 is different from the preparation example 1 in that the modified PET film is prepared from the following raw materials in parts by weight: 100 parts of film grade PET resin (film grade PET DuPont U.S. FC 51), 5 parts of PEN resin (brand TN-8050SC, di human Co.), 2.5 parts of TPEE-7246, 1 part of antioxidant 1010, 1.6 parts of antioxidant 626, 0.8 part of antioxidant 2246A, 2 parts of UV-9, 2.4 parts of UV-944, 6.15 parts of nano titanium dioxide, 0.62 part of T-ZnO whisker, 1.23 parts of KH550 siloxane.
Preparation example 4
Preparation example 4 differs from preparation example 1 in that the modified PET film is prepared from the following raw materials in parts by weight: 100 parts of film grade PET resin (film grade PET DuPont U.S. FC 51), 12 parts of PEN resin (brand TN-8050SC, di human Co.), 2.5 parts of TPEE-7246, 1 part of antioxidant 1010, 1.6 parts of antioxidant 626, 0.8 part of antioxidant 2246A, 2 parts of UV-9, 2.4 parts of UV-944, 6.15 parts of nano titanium dioxide, 0.62 part of T-ZnO whisker, 1.23 parts of KH550 siloxane.
Preparation example 5
The imide-modified polyol is prepared from 185.2g of maleimide-diethylene glycol (molecular weight 185.18, CAS:34321-81-8, molecular formula: C) 8 H 11 NO 4 ) 7307g of adipic acid (molecular weight 146.14, brand: medium petrochemical, CAS: 124-04-9), 4963.6g of 3-methyl-1, 5-pentanediol (molecular weight 118.17,CAS: 4457-71-0), 1240.8g of 1, 6-hexanediol (molecular weight 118.17).
A process for preparing an imide-modified polyol comprising the steps of:
firstly, charging, namely charging adipic acid, 1, 6-hexanediol and 3-methyl-1, 5-pentanediol which are accurately measured into a reaction kettle, uniformly mixing, heating to 130-135.0 ℃, reacting to water, heating to 220-230 ℃, performing transesterification for 2.0h, detecting an acid value, if the acid value is higher than 25mgKOH/g, continuing to perform reaction until the acid value is lower than 25mgKOH/g, vacuumizing when the acid value is lower than 25mgKOH/g, pumping the gauge pressure from 0.018MPa to 0.098MPa, continuously reacting until the OH value is controlled at 56+/-3, uniformly mixing the polyester polyol and maleimide in the step three according to a proportion, stirring to be completely dissolved into transparent liquid at 88-90 ℃, then performing reaction for 4h at 130-135 ℃, naturally cooling, and discharging to obtain the modified polyamide polyol with the molecular weight of 2000.
Preparation example 6
The adhesive film is prepared from the following raw materials: 1 mol of HDI, 8.2 mol of MDI-50, 0.8 mol of MDI, 1.7 mol of 1, 6-hexanediol, 5mol of 1, 4-butanediol, 2.8mol of 3-methyl-1, 5-pentanediol, 1.36mol of imide-modified polyol with a molecular weight of 2000 in preparation example 5, 0.34mol of polyhexamethylene carbonate diol with a molecular weight of 2000, 35g of antioxidant 1010, 3.4g of bismuth octoate, 200g of nano barium sulfate powder (D50 is 200-250 nm) and 5g of tetrapod-like zinc oxide whiskers.
A method of preparing an adhesive film comprising the steps of:
step one, feeding:
200.9g of 1, 6-hexanediol, 450.6g of 1, 4-butanediol and 330.88g of 3-methyl-1, 5-pentanediol were fed into the first trough of a twin-screw extruder;
2720g of the imide-modified polyol of preparation 5 and 680g of polyhexamethylene carbonate diol are fed into the second trough of the twin-screw extruder with accurate metering;
168.17g of MDI, 2052.1g of MDI-50, 200.2g of HDI, 3.4g of bismuth octodecanoate, 35g of antioxidant 1010, 5g of tetrapod-like zinc oxide whisker and 200g of nano barium sulfate powder are stirred uniformly and then put into a third trough of a double-screw extruder;
discharging materials from the extruder by using a gear pump at the barrel section temperature of 220-230 ℃ in a double-screw extruder, granulating by water cooling, drying the obtained granules in a fluidized bed dryer at 85 ℃ for 10min until the water content is less than 0.03%, and then performing thermal adjustment for 24 hours at 80 ℃ to obtain TPU resin;
Step three, adding the TPU resin in the step two into a double-screw extruder, conveying the extruded melt material into a casting machine for casting to form a film, sequentially passing through 5 casting rollers, wherein the surface Wen Fenbei of the casting rollers is 80 ℃, 60 ℃, 50 ℃, 45 ℃, 40 ℃, the casting film is fed into a biaxial stretching system for biaxial stretching under the traction of a traction roller, the temperature of an oven is 115-120 ℃, the longitudinal and transverse stretching ratio is 2.4, the stretched film is cooled to normal temperature by a cooling roller, the stretched film sequentially passes through four cooling rollers, the temperature of the cooling rollers is respectively 50 ℃, 40 ℃, 35 ℃, and the normal temperature, and the adhesive film is obtained by winding.
Preparation example 7
Preparation example 7 differs from preparation example 6 in that the adhesive film is prepared from the following raw materials: 1 mol of HDI, 8.2 mol of MDI-50, 0.8 mol of MDI, 1.7 mol of 1, 6-hexanediol, 5mol of 1, 4-butanediol, 2.8mol of 3-methyl-1, 5-pentanediol, 1.275mol of imide-modified polyol with a molecular weight of 2000 in preparation example 5, 0.425mol of polyhexamethylene carbonate glycol with a molecular weight of 2000, 35g of antioxidant 1010, 3.4g of bismuth octoate, 200g of nano barium sulfate powder, 5g of tetrapod-like zinc oxide whiskers.
Preparation example 8
Preparation example 8 differs from preparation example 6 in that the adhesive film is prepared from the following raw materials: 1 mol of HDI, 8.2 mol of MDI-50, 0.8 mol of MDI, 1.7 mol of 1, 6-hexanediol, 5mol of 1, 4-butanediol, 2.8mol of 3-methyl-1, 5-pentanediol, 0.85mol of imide-modified polyol with a molecular weight of 2000 in preparation example 5, 0.85mol of polyhexamethylene carbonate glycol with a molecular weight of 2000, 35g of antioxidant 1010, 3.4g of bismuth octoate, 200g of nano barium sulfate powder and 5g of tetrapod-like zinc oxide whisker.
Preparation example 9
Preparation example 9 differs from preparation example 6 in that the adhesive film is prepared from the following raw materials: 1 mol of HDI, 8.2 mol of MDI-50, 0.8 mol of MDI, 1.7 mol of 1, 6-hexanediol, 5mol of 1, 4-butanediol, 2.8mol of 3-methyl-1, 5-pentanediol, 1.4875mol of imide-modified polyol with a molecular weight of 2000 in preparation example 5, 0.2125mol of polyhexamethylene carbonate glycol with a molecular weight of 2000, 35g of antioxidant 1010, 3.4g of bismuth octodecanoate, 200g of nano barium sulfate powder, and 5g of tetrapod-like zinc oxide whiskers.
Preparation example 10
The self-healing reinforced film is prepared from the following raw materials: 1.2 moL of HDI, 8.0 moL of MDI-50, 0.8 moL of MDI, 2.0 moL of 1, 6-hexanediol, 4.0moL of 1, 4-butanediol, 2.43 moL of 3-methyl-1, 5-pentanediol, 0.748moL of imide-modified polyol of molecular weight 2000 in preparation example 5, 0.187moL of polyhexamethylene carbonate diol of molecular weight 2000, 0.935moL of dimethylglyoxime, 35g of antioxidant 1010, 3.4g of bismuth octodecanoate, 200g of nano barium sulfate powder (D50 is 200-250 nm), 5g of tetrapod-like zinc oxide whiskers.
A method of preparing an adhesive film comprising the steps of:
step one, feeding:
236.34g of 1, 6-hexanediol, 360.48g of 1, 4-butanediol and 287.15g of 3-methyl-1, 5-pentanediol were fed into the first trough of a twin-screw extruder;
accurately metered 1496g of the imide-modified polyol of preparation example 5, 108.57g of dimethylglyoxime, 374g of polyhexamethylene carbonate diol were fed into the second trough of a twin-screw extruder;
201.81g of MDI, 2001.1g of MDI-50, 200.2g of HDI, 3.4g of bismuth octodecanoate, 35g of antioxidant 1010, 5g of tetrapod-like zinc oxide whisker and 200g of nano barium sulfate powder are stirred uniformly and then put into a third trough of a double-screw extruder;
discharging materials from the extruder by using a gear pump at the barrel section temperature of 220-230 ℃ in a double-screw extruder, granulating by water cooling, drying the obtained granules in a fluidized bed dryer at 85 ℃ for 10min until the water content is less than 0.03%, and then performing thermal adjustment for 24 hours at 80 ℃ to obtain TPU resin;
step three, adding the TPU resin in the step two into a double-screw extruder, conveying the extruded melt material into a casting machine for casting to form a film, sequentially passing through 5 casting rollers, wherein the surface Wen Fenbei of the casting rollers is 80 ℃, 60 ℃, 50 ℃, 45 ℃ and 40 ℃, the casting film is fed into a biaxial stretching system for biaxial stretching under the traction of a traction roller, the temperature of an oven is 115-120 ℃, the longitudinal and transverse stretching ratio is 4.0, the stretched film is cooled to normal temperature by a cooling roller, the stretched film sequentially passes through four cooling rollers, the temperature of the cooling rollers is respectively 50 ℃, 40 ℃, 35 ℃ and normal temperature, and the semi-finished self-healing reinforced film is obtained by winding;
And fourthly, carrying out heat treatment, namely conveying the semi-finished self-healing type reinforced film into a heat treatment furnace, heating to 68 ℃ at a heating rate of 0.65 ℃/min, preserving heat for 100s, heating to 80 ℃ at a heating rate of 0.8 ℃/min, preserving heat for 15min, heating to 40 ℃ at a cooling rate of 1.5 ℃/min, and naturally cooling and rolling to obtain the finished self-healing type reinforced film.
Examples
Example 1
Referring to fig. 1, in order to disclose a solar cell back sheet with high weather resistance and high water vapor barrier, a first modified PET film 1, a first adhesive film 2, a PVDC composite film 3, a second adhesive film 4, and a second modified PET film 5, wherein the first adhesive film 2 is thermally pressed and compounded on the upper surface of the PVDC composite film 3. The second adhesive film 4 is thermocompression bonded to the lower surface of the PVDC composite film 3. The first modified PET film 1 is compounded on the surface of the first adhesive film 2 facing away from the PVDC composite film 3 in a hot pressing way. The second modified PET film 5 is compounded on the surface of the second adhesive film 4 facing away from the PVDC composite film 3 by hot pressing. The modified PET film in preparation example 1 was used for the first modified PET film 1 and the second modified PET film 5. The first adhesive film 2 and the second adhesive film 4 were adhesive films of preparation example 6.
Referring to fig. 1 and 2, the pvdc composite film 3 is integrally formed with a plurality of communication holes 31, and the communication holes 31 are uniformly distributed in a lattice. The diameter of the communication hole 31 is 15mm; the porosity of the PVDC composite film 3 was 25%. The PVDC composite film 3 is heat-press-compounded with a plurality of gas barrier films 30, and the number of the gas barrier films 30 is twice the number of the communication holes 31. Two gas barrier films 30 are respectively laminated on the upper and lower surfaces of the PVDC composite film 3, and seal the single communication hole 31. The gas barrier film 30 has a diameter 1.25 times that of the communication hole 31, and the gas barrier film 30 is an EVOH film. In order to enhance the overall adhesion stability, the upper and lower surfaces of the PVDC composite film 3 are formed with adhesion-promoting stabilizing layers 300 by low-temperature plasma treatment. The low-temperature plasma treatment method comprises the steps of ultrasonically cleaning the upper and lower surfaces of a PVDC composite film 3 by adopting a 5% sodium hydroxide aqueous solution, ultrasonically cleaning the upper and lower surfaces of the PVDC composite film 3 by adopting deionized water, drying, and performing low-temperature plasma treatment for 15min by adopting oxygen at the temperature of 0-4 ℃ and the pressure of 20Pa under the power of 605W.
A solar cell backboard with high weather resistance and high water vapor barrier and a preparation method thereof comprise the following steps:
step one, preparing a first modified PET film 1, a first adhesive film 2, a second adhesive film 4 and a second modified PET film 5, and carrying out low-temperature plasma treatment on the surface of a PVDC composite film 3;
step two, the upper surface and the lower surface of the PVDC composite film 3 subjected to surface low-temperature plasma treatment are respectively compounded with a first adhesive film 2 and a second adhesive film 4;
step three, compounding a first modified PET film 1 on the surface of a first adhesive film 2, compounding a second modified PET film 5 on the surface of a second adhesive film 4, and carrying out hot pressing compounding to obtain a semi-finished product;
step four, heat treatment: the semi-finished product is sent into a heat treatment furnace, heated to 80-85 ℃ at a heating rate of 0.8-1.0 ℃/min, kept for 60-80s, heated to 100-125 ℃ at a heating rate of 0.5-0.65 ℃/min, kept for 5-7min, naturally cooled and rolled to obtain the finished backboard.
Example 2
Example 2 differs from example 1 in that: referring to fig. 3 and 4, the surface of the gas barrier film facing away from the PVDC composite film 3 is composited with a self-healing type reinforcing film 301, and the self-healing type reinforcing film 301 is the self-healing type reinforcing film in preparation example 10.
Example 3
Example 3 differs from example 1 in that: the modified PET film in preparation example 2 was used for the first modified PET film 1 and the second modified PET film 5.
Example 4
Example 4 differs from example 1 in that: the first adhesive film 2 and the second adhesive film 7 were adhesive films of preparation example 6.
Example 5
Example 5 differs from example 1 in that: the porosity of the PVDC composite film 3 was 20%.
Example 6
Example 6 differs from example 1 in that: the porosity of the PVDC composite film 3 was 30%.
Comparative example
Comparative example 1
Comparative example 1 differs from example 1 in that: the modified PET film in preparation example 3 was used for the first modified PET film 1 and the second modified PET film 5.
Comparative example 2
Comparative example 2 differs from example 1 in that: the modified PET film in preparation example 4 was used for the first modified PET film 1 and the second modified PET film 5.
Comparative example 3
Comparative example 3 differs from example 1 in that: the first modified PET film 1 and the second modified PET film 5 were the pure PET film in preparation example 4.
Comparative example 4
Comparative example 4 differs from example 1 in that: the first adhesive film 2 and the second adhesive film 7 were adhesive films of preparation example 8.
Comparative example 5
Comparative example 5 differs from example 1 in that: the first adhesive film 2 and the second adhesive film 7 were adhesive films of preparation example 9.
Comparative example 6
Comparative example 6 differs from example 1 in that: the first adhesive film 2 and the second adhesive film 7 were used as commercially available TPU hot melt adhesive films ((TPU hot melt adhesive film JX-410, dongguan city Gao Xiang, new Material technology limited).
Comparative example 7
Comparative example 7 differs from example 1 in that: the porosity of the PVDC composite film 3 was 10%.
Comparative example 8
Comparative example 8 differs from example 1 in that: the porosity of the PVDC composite film 3 was 40%.
Comparative example 9
Comparative example 9 differs from example 1 in that:
referring to fig. 5, a solar cell back sheet with high weather resistance and high water vapor barrier is provided, wherein a first modified PET film 1, a first adhesive film 2, a PVDC composite film 3, a second adhesive film 4 and a second modified PET film 5 are laminated on the upper surface of the PVDC composite film 3 by hot pressing the first adhesive film 2. The second adhesive film 4 is thermocompression bonded to the lower surface of the PVDC composite film 3. The first modified PET film 1 is compounded on the surface of the first adhesive film 2 facing away from the PVDC composite film 3 in a hot pressing way. The second modified PET film 5 is compounded on the surface of the second adhesive film 4 facing away from the PVDC composite film 3 by hot pressing. The PVDC composite film 3 is not provided with the communication hole 31 and is also composite with the gas barrier membrane 30.
Performance test
Detection method/test method
1. Water vapor transmission test: the test was carried out according to ISO 2528-1995 Standard for gravimetric determination of moisture permeability of sheet Material.
2. Oxygen transmission amount: the test is carried out according to GB/T19789-2005 Coulomb meter test method for packaging material plastic film and sheet oxidative permeability test.
3. Peel strength test: the flexible materials were tested according to the standard CB/T2791-1995 adhesive T peel strength test method-flexible materials.
Test object: peel strength between the first adhesive film, PVDC composite film, and peel strength between the second adhesive film, PVDC composite film in examples 1 to 6 and comparative examples 1 to 9.
4. Wet heat aging test: test piece preparation, material selection example 2, a first adhesive film and a first modified PET film are compounded on the upper surface of a PVDC composite film in a hot-pressing mode (80 ℃ and pressure is 5 kg), a second adhesive film and a second modified PET film are compounded on the lower surface of the PVDC composite film in a hot-pressing mode (80 ℃ and pressure is 5 kg), and the test sample is obtained after natural cooling to normal temperature. And (3) testing: and (3) setting an aging box: the temperature is 85 ℃, the humidity is 85 percent, and the oxygen is continuously blown; the test pieces were placed in an aging oven (high-low temperature wet heat aging oven, model YSGJS) and aged for 1000 hours, and the water vapor transmission amount, oxygen transmission amount, and peel strength were tested.
Data analysis
Table 1 shows the barrier performance test parameters for examples 1-6 and comparative examples 1-9
| Water vapor transmission rate g/(m) 2 *168h) | Oxygen transmission rate/25 ℃ cm 3 /(m 2 *168h*0.1Mpa) | |
| Example 1 | 0.12 | 1.06 |
| Example 2 | 0.10 | 0.96 |
| Example 3 | 0.10 | 0.98 |
| Example 4 | 0.12 | 1.04 |
| Example 5 | 0.09 | 0.92 |
| Example 6 | 0.14 | 1.22 |
| Comparative example 1 | 0.22 | 3.05 |
| Comparative example 2 | 0.10 | 0.91 |
| Comparative example 3 | 0.36 | 4.36 |
| Comparative example 4 | 0.12 | 1.24 |
| Comparative example 5 | 0.12 | 1.18 |
| Comparative example 6 | 0.15 | 1.32 |
| Comparative example 7 | 0.09 | 0.88 |
| Comparative example 8 | 0.16 | 1.35 |
| Comparative example 9 | 0.09 | 0.85 |
Table 2 shows the peel strength test parameters for examples 1-6 and comparative examples 1-9
Table 3 shows the weather resistance test parameters of example 2
It can be seen from the combination of examples 1 to 6 and comparative examples 1 to 9 and the combination of table 1 that the water vapor transmission amount and the oxygen transmission amount of examples 1 and 3 are smaller than those of comparative examples 1 and 3, and that the water vapor transmission amount and the oxygen transmission amount of examples 1 and 3 differ slightly from those of comparative example 2, so that when the amount of PEN resin is controlled to 8 to 10 parts, the high water vapor barrier performance of the present application can be ensured, the production cost can be reduced, and the marketing is facilitated.
As can be seen in combination with examples 1-6 and comparative examples 1-9 and with table 1, the water vapor transmission amount and the oxygen transmission amount of example 2 are smaller than those of example 1, and therefore, the provision of the self-healing reinforcing film has positive significance for improvement of the overall water vapor barrier property. In addition, the self-healing enhanced film has a self-healing effect, and can further improve the stability and durability of the water vapor barrier property.
It can be seen in combination with examples 1-6 and comparative examples 1-9 and with Table 1 that the water vapor transmission and oxygen transmission of examples 1, 5-6 are less than comparative example 8, but greater than comparative examples 7, 9. With reference to table 2, the peel strength of examples 1, 5-6 is greater than that of comparative examples 7, 9, and the peel strength of examples 1, 5-6 differs less from that of comparative example 8, so that the porosity of the PVDC composite film is controlled to be 20-30% relatively better, and the preferential porosity is 25%, which can ensure the bonding stability and service life of the present application, and can also ensure the water vapor barrier effect of the present application.
It can be seen from the combination of examples 1 to 6 and comparative examples 1 to 9 and Table 2 that the peel strengths of examples 1 and 4 are greater than those of comparative examples 4 and 6, and that the peel strengths of examples 1 and 4 are less different from those of comparative example 5, and thus the solar back sheet material prepared using the adhesive films of preparation examples 6 to 7 has good adhesive stability and a relatively long service life.
It can be seen by combining example 2 with Table 3 that the application has better weather resistance, and the service life of the whole application is ensured.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (8)
1. The utility model provides a high resistant, high steam separation formula solar cell backplate of waiting, which characterized in that: the PVC film comprises a first modified PET film (1), a first adhesive film (2), a PVDC composite film (3), a second adhesive film (4) and a second modified PET film (5), wherein the first adhesive film (2) is compounded on the upper surface of the PVDC composite film (3); the second adhesive film (4) is compounded on the lower surface of the PVDC compound film (3); the first modified PET film (1) is compounded on the surface of the first adhesive film (2) facing away from the PVDC composite film (3); the second modified PET film (5) is compounded on the surface of the second adhesive film (4) facing away from the PVDC composite film (3); the PVDC composite film (3) is integrally formed with a plurality of communication holes (31); the communication holes (31) are uniformly distributed in a lattice mode; the PVDC composite film (3) is compounded with a plurality of gas barrier films (30); the number of the gas barrier films (30) is twice the number of the communication holes (31); the two gas barrier films (30) are respectively compounded on the upper surface and the lower surface of the PVDC compound film (3), and the single communication hole (31) is sealed; the first modified PET film (1) and the second modified PET film (5) are prepared from the following raw materials: 100 parts of film-grade PET resin, 8-10 parts of PEN resin, 2-3 parts of compatilizer, 3-5 parts of heat stabilizer, 3-5 parts of ultraviolet resistance agent and 3-8 parts of filler compound; the diameter of the communication hole (31) is 12-18mm; the porosity of the PVDC composite film (3) is 20-30%; the diameter of the gas barrier membrane (30) is 1.25-1.4 times of the diameter of the communication hole (31); the gas barrier membrane (30) is an EVOH film; the first adhesive film (2) and the second adhesive film (4) are prepared from the following raw materials: HDI, MDI-50, MDI, 1, 6-hexanediol, 1, 4-butanediol, 3-methyl-1, 5-pentanediol, an imide-modified polyol having a molecular weight of 2000, a polyhexamethylene carbonate glycol having a molecular weight of 2000, an antioxidant, bismuth octodecanoate, nano barium sulfate powder; the molar weight ratio of the HDI to the MDI-50 to the MDI is 1:8.2:0.8; the total content of hydroxyl groups in the 1, 6-hexanediol, 1, 4-butanediol and 3-methyl-1, 5-pentanediol is 5 times that in the imide modified polyol with the molecular weight of 2000 and the polyhexamethylene carbonate glycol with the molecular weight of 2000; the total content of hydroxyl groups in the 1, 6-hexanediol, 1, 4-butanediol, 3-methyl-1, 5-pentanediol, imide modified polyol with the molecular weight of 2000 and polyhexamethylene carbonate glycol with the molecular weight of 2000 is 1.02-1.05 times of that of isocyanate groups in HDI, MDI-50 and MDI; the molar ratio of hydroxyl groups in the imide modified polyol with the molecular weight of 2000 and the polyhexamethylene carbonate glycol with the molecular weight of 2000 is (3-4): 1, a step of; the imide modified polyol with the molecular weight of 2000 is prepared from maleimide-diethylene glycol, adipic acid, 1, 6-hexanediol and 3-methyl-1, 5-pentanediol.
2. The solar cell back sheet of claim 1, wherein the solar cell back sheet is characterized by: the upper and lower surfaces of the PVDC composite film (3) are subjected to low-temperature plasma treatment to form a tackifying stable layer (300); the low-temperature plasma treatment method comprises the steps of ultrasonically cleaning the upper and lower surfaces of a PVDC composite membrane (3) by adopting a 5% sodium hydroxide aqueous solution, ultrasonically cleaning the upper and lower surfaces of the PVDC composite membrane (3) by adopting deionized water, drying, and performing low-temperature plasma treatment for 10-20min by adopting oxygen at the temperature of 0-4 ℃ and the pressure of 10-20 Pa.
3. The solar cell back sheet of claim 1, wherein the solar cell back sheet is characterized by: the first modified PET film (1) and the second modified PET film (5) are prepared from the following raw materials: 100 parts of film grade PET resin, 8-10 parts of PEN resin, 2-3 parts of TPEE-7246, 1 part of antioxidant 1010, 1.6 parts of antioxidant 626, 0.8 part of antioxidant 2246A, 2 parts of UV-9, 2.4 parts of UV-944 and 6-8 parts of filler compound.
4. The solar cell back sheet of claim 3, wherein the solar cell back sheet is characterized by: the filler compound comprises nano titanium dioxide, T-ZnO whisker and KH550 siloxane; the mass ratio of the nano titanium dioxide to the T-ZnO whisker to the KH550 siloxane is 10:1: (1-2).
5. The solar cell back sheet of claim 3, wherein the solar cell back sheet is characterized by: the preparation method of the first modified PET film (1) and the second modified PET film (4) comprises the following steps:
step one, drying PEN resin, film-grade PET resin and TPEE-7246 for later use;
placing the PEN resin, the film-grade PET resin, the TPEE-7246, the antioxidant 1010, the antioxidant 626, the antioxidant 2246A, UV-9, the UV-944 and the filler compound which are accurately measured in the step one into a high-speed dispersing kettle, uniformly dispersing, adding the mixture into a double-screw extruder, extruding and granulating, water-cooling, and granulating to obtain modified PET granules with the granularity of 1.5-2.5 mm;
step three: the modified PET granules are placed at 100 ℃ and dried for 4 hours for standby;
and step four, adding the dried modified PET granules into a double-screw extruder for extrusion, conveying the obtained melt into a casting machine for casting to form a film, wherein the surface temperature of a casting roller is 35-40 ℃, carrying out bidirectional stretching on the obtained casting film, and the longitudinal and transverse stretching ratios of the obtained casting film are 2.8-3.2, cooling the biaxially stretched film to normal temperature through a cooling roller, and rolling to obtain the finished PET film.
6. The solar cell back sheet of claim 1, wherein the solar cell back sheet is characterized by: the preparation method of the first adhesive film (2) and the second adhesive film (4) comprises the following steps:
Firstly, preparing an imide modified polyol with a molecular weight of 2000, feeding, namely adding adipic acid, 1, 6-hexanediol and 1, 4-butanediol which are accurately measured into a reaction kettle, uniformly mixing for later use, heating to 130-135.0 ℃, reacting until effluent is obtained, heating to 220-230 ℃, carrying out transesterification for 2.0h, detecting an acid value, if the acid value is higher than 25mgKOH/g, continuing to react until the acid value is lower than 25mgKOH/g, and vacuumizing after the acid value is lower than 25mgKOH/g, and continuously reacting until the OH-value is controlled to be 56+/-3, wherein the imide modified polyol with a molecular weight of 2000;
feeding, namely feeding accurately-metered 3-methyl-1, 5-pentanediol, 1, 6-hexanediol and 1, 4-butanediol into a first material tank of a double-screw extruder, feeding accurately-metered polyhexamethylene carbonate glycol with molecular weight of 2000 and imide modified polyol into a second material tank of the double-screw extruder, uniformly stirring MDI, MDI-50, HDI, bismuth octodecanoate, an antioxidant and nano barium sulfate powder, and feeding into a third material tank of the double-screw extruder;
discharging the materials from the extruder by using a gear pump at the barrel section temperature of 220-230 ℃, granulating by water cooling, drying the obtained granules in a fluidized bed dryer at 80-85 ℃ for 10-12min until the water content is less than 0.03%, and then performing thermal adjustment for 20-24h at 80 ℃ to obtain TPU granules;
And step four, adopting TPU granules in the step three to cast into a film, and obtaining a finished adhesive film.
7. The solar cell back sheet of claim 1, wherein the solar cell back sheet is characterized by: the surface of the gas barrier membrane, which is opposite to the PVDC composite membrane (3), is compounded with a self-healing reinforced film (301); the self-healing reinforced film (301) is prepared from the following raw materials: HDI, MDI-50, MDI, 1, 6-hexanediol, 1, 4-butanediol, 3-methyl-1, 5-pentanediol, a mixture of polyols, an antioxidant, bismuth octodecanoate and nano barium sulfate powder; the molar ratio of the HDI to the MDI-50 to the MDI is 1.2:8.0:0.8; the polyatomic alcohol mixture is imide modified polyatomic alcohol with the molecular weight of 2000, polyhexamethylene carbonate glycol with the molecular weight of 2000 and dimethylglyoxime; the molar ratio of hydroxyl groups in the imide modified polyol with the molecular weight of 2000, the polyhexamethylene carbonate diol with the molecular weight of 2000 and the dimethylene carbonate diol with the molecular weight of 2000 is 4:1:5, a step of; the total content of hydroxyl groups in the 1, 6-hexanediol, 1, 4-butanediol and 3-methyl-1, 5-pentanediol is 4.5 times of that in the polyol mixture; the total content of hydroxyl groups in the mixture of the 1, 6-hexanediol, the 1, 4-butanediol, the 3-methyl-1, 5-pentanediol and the polyol is 1.02 to 1.05 times of that of isocyanate groups in HDI, MDI-50 and MDI; the imide modified polyol with the molecular weight of 2000 is prepared from maleimide-diethylene glycol, adipic acid, 1, 6-hexanediol and 3-methyl-1, 5-pentanediol.
8. The method for preparing the solar cell backboard with high weather resistance and high water vapor barrier according to any one of claims 1 to 7, which is characterized in that: the method comprises the following steps:
step one, preparing a first modified PET film (1), a first adhesive film (2), a second adhesive film (4) and a second modified PET film (5), and carrying out low-temperature plasma treatment on the surface of a PVDC composite film (3);
step two, the upper surface and the lower surface of the PVDC composite film (3) subjected to surface low-temperature plasma treatment are respectively compounded with a first adhesive film (2) and a second adhesive film (4);
step three, compounding a first modified PET film (1) on the surface of the first adhesive film (2), compounding a second modified PET film (5) on the surface of the second adhesive film (4), and carrying out hot pressing and compounding to obtain a semi-finished product;
step four, heat treatment: the semi-finished product is sent into a heat treatment furnace, heated to 80-85 ℃ at a heating rate of 0.8-1.0 ℃/min, kept for 60-80s, heated to 100-125 ℃ at a heating rate of 0.5-0.65 ℃/min, kept for 5-7min, naturally cooled and rolled to obtain the finished backboard.
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| CN101359695A (en) * | 2008-09-02 | 2009-02-04 | 中国乐凯胶片集团公司 | Back plate of solar cell |
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| CN108461565A (en) * | 2017-05-19 | 2018-08-28 | 浙江帝恒实业有限公司 | A kind of Weatherproof solar battery back-sheet and preparation method thereof |
| CN110294907A (en) * | 2018-03-23 | 2019-10-01 | 深圳市一心电子有限公司 | Backboard membrane used for solar batteries and preparation method thereof |
| CN114179482A (en) * | 2022-01-17 | 2022-03-15 | 浙江博佳包装有限公司 | Multilayer composite packaging material with good barrier property and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101359695A (en) * | 2008-09-02 | 2009-02-04 | 中国乐凯胶片集团公司 | Back plate of solar cell |
| CN103280475A (en) * | 2013-05-02 | 2013-09-04 | 宁波长阳科技有限公司 | Solar battery backplate and preparation method thereof |
| CN105428445A (en) * | 2014-08-26 | 2016-03-23 | 明冠新材料股份有限公司 | Solar photovoltaic battery assembly transparent backboard composite film and preparation method thereof |
| CN108461565A (en) * | 2017-05-19 | 2018-08-28 | 浙江帝恒实业有限公司 | A kind of Weatherproof solar battery back-sheet and preparation method thereof |
| CN110294907A (en) * | 2018-03-23 | 2019-10-01 | 深圳市一心电子有限公司 | Backboard membrane used for solar batteries and preparation method thereof |
| CN114179482A (en) * | 2022-01-17 | 2022-03-15 | 浙江博佳包装有限公司 | Multilayer composite packaging material with good barrier property and preparation method thereof |
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