CN108598196B - High-weather-resistance solar cell back plate and preparation method thereof - Google Patents

High-weather-resistance solar cell back plate and preparation method thereof Download PDF

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Publication number
CN108598196B
CN108598196B CN201810351680.XA CN201810351680A CN108598196B CN 108598196 B CN108598196 B CN 108598196B CN 201810351680 A CN201810351680 A CN 201810351680A CN 108598196 B CN108598196 B CN 108598196B
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weather
solar cell
layer
resistant layer
epoxy resin
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CN108598196A (en
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董廷显
李春山
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GUILIN BONENG TECHNOLOGY Co.,Ltd.
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Shandong Dongrui High-Tech Development Co Ltd
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    • 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
    • H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/22—Esters containing halogen
    • C08F220/24—Esters containing halogen containing perhaloalkyl radicals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F230/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal
    • C08F230/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal
    • C08F230/08—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal containing silicon
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/206—Insulating
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/552—Fatigue strength
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/10—Batteries
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/12—Photovoltaic modules
    • 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

Abstract

The invention discloses a high-weather-resistance solar cell backboard, which sequentially comprises a first weather-resistant layer, an insulating and blocking layer and a second weather-resistant layer from inside to outside, wherein the first weather-resistant layer is bonded with the insulating and blocking layer and the insulating and blocking layer is bonded with the second weather-resistant layer through bonding layers; the first weather-resistant layer and the second weather-resistant layer are both silicon fluorene fluorine-containing resin material layers; the insulating and blocking layer is a polyethylene terephthalate (PET) layer; the adhesive layer is a blend layer of ethylene-vinyl acetate copolymer and JD919 amino tetrafunctional group epoxy resin. The preparation method of the solar cell backboard with high weather resistance comprises the steps of plasma corona treatment, lamination and curing. The high-weather-resistance solar cell back plate disclosed by the invention has excellent weather resistance, electric insulation performance, oxidation resistance, moisture resistance, and long-term hydrolysis resistance and barrier performance of an adhesive.

Description

High-weather-resistance solar cell back plate and preparation method thereof
Technical Field
The invention belongs to the technical field of solar cell manufacturing, relates to a solar cell module packaging material, and particularly relates to a high-weather-resistance solar cell back plate and a preparation method thereof.
Background
In recent years, with the rapid development of economy and the progress of global industrialization, energy and environmental problems remain as important factors that restrict social progress. To address these issues, clean renewable energy devices have attracted a great deal of attention in the industry. The solar cell is one of a plurality of clean renewable energy devices, which directly converts light energy into electric energy through a photoelectric effect or a photochemical effect, and has the characteristics of excellent photoelectric conversion efficiency, long cycle life, cleanness and no environmental pollution, so the solar cell is widely applied to the aspects of military affairs, spaceflight, industry, commerce, agriculture, communication, household appliances, public facilities and the like, and makes a prominent contribution to the reduction of the dependence of the existing production life on the coal-electricity industry.
The solar cell backboard is one of solar cell module packaging materials, can effectively improve the overall mechanical strength of a solar cell panel, and can prevent the service life of a cell piece from being reduced due to the fact that water vapor permeates into a sealing layer. Therefore, the photoelectric conversion efficiency and the cycle service life of the solar cell are directly influenced by the performance of the solar cell back plate.
At present, commercially available solar cell back plates are all of multilayer composite structures, and are all manufactured by using a polyester film as a base material film and coating fluorine-containing materials such as a polyvinyl fluoride film, a polyvinylidene fluoride film (PVDF) or fluorocarbon resin, but most of the fluorine-containing materials are imported from abroad, are expensive, have complex production processes, have poor interlayer peeling strength with a core layer material, are easy to fall off, and have poor adhesion, low electrical insulation, poor weather resistance, and are easy to embrittle and tear, so that the back plates cannot meet the requirements of high-end products.
Therefore, the development of the solar cell back plate which has excellent weather resistance, electric insulation performance, oxidation resistance, moisture resistance, long-term prevention of hydrolysis performance of an adhesive and barrier performance has important market value, and has positive promotion effect on further development of the solar cell industry.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the solar cell back plate with high weather resistance and the preparation method thereof, and the preparation method has the advantages of simple and feasible process, easily obtained raw materials, low price, low requirements on equipment and reaction conditions, and suitability for large-scale production; the high-weather-resistance solar cell back plate prepared by the preparation method overcomes the technical problems that the traditional solar cell back plate in the prior art is high in price, poor in interlayer peeling strength, easy to fall off, low in electrical insulating property, poor in adhesion and weather resistance, easy to embrittle and tear and incapable of meeting the requirements of high-end products, and has excellent weather resistance, electrical insulating property, oxidation resistance, moisture resistance and long-term hydrolysis resistance and barrier property of an adhesive.
In order to achieve the purpose, the technical scheme adopted by the invention is that the solar cell backboard with high weather resistance sequentially comprises a first weather-resistant layer, an insulating barrier layer and a second weather-resistant layer from inside to outside, wherein the first weather-resistant layer and the insulating barrier layer as well as the insulating barrier layer and the second weather-resistant layer are respectively bonded through bonding layers; the first weather-resistant layer and the second weather-resistant layer are both silicon fluorene fluorine-containing resin material layers; the insulation barrier layer is a polyethylene terephthalate (PET) layer; the adhesive layer is a blend layer of ethylene-vinyl acetate copolymer and JD919 amino tetrafunctional group epoxy resin.
Preferably, the preparation method of the silafluorene fluorine-containing resin material comprises the following steps:
1) dissolving methyl vinyl silafluorene, butadiene, hexafluorobutyl methacrylate, 2-vinyl isonicotinic nitrile, an emulsifier and an initiator in a high boiling point solvent, stirring and reacting for 2.5-3.5 hours at the temperature of 60-65 ℃ under the atmosphere of nitrogen or inert gas, then precipitating in ethanol, and placing in a vacuum drying oven to be dried for 10-15 hours at the temperature of 75-85 ℃ to obtain the silicofluorene fluorine-containing copolymer;
2) dissolving the silico-fluorene fluorine-containing copolymer prepared in the step 1) in N-methyl pyrrolidone, adding 3-phenyl-1, 2, 4-triazole-5-thiol, methanol and a catalyst, stirring and reacting for 0.5-1 hour at 40-50 ℃, then precipitating in ethanol, washing the product for 4-6 times with ethyl acetate, and then placing in a vacuum drying oven for drying for 10-15 hours at 75-85 ℃ to obtain the silico-fluorene fluorine-containing resin material.
Furthermore, the mass ratio of the methylvinylsilfluorene, the butadiene, the hexafluorobutyl methacrylate, the 2-vinyl isonicotinic nitrile, the emulsifier, the initiator and the high-boiling point solvent in the step 1) is 1 (0.3-0.5) to 1 (0.5-1) to 0.01-0.03 to 10-15.
Preferably, the high boiling point solvent is selected from one or more of dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone.
Preferably, the inert gas is selected from one or more of helium, neon and argon.
Preferably, the emulsifier is selected from one or more of sodium dodecyl benzene sulfonate, polyoxyethylene polyethylene glycerol ether and polyoxyethylene nonyl phenyl ether.
Preferably, the initiator is selected from one or more of azobisisobutyronitrile, azobisisoheptonitrile, tert-butyl peroxybenzoate and dicyclohexyl peroxydicarbonate.
Preferably, the mass ratio of the silicofluorene fluorine-containing copolymer in the step 2) to the N-methylpyrrolidone to the 3-phenyl-1, 2, 4-triazole-5-thiol to the methanol to the catalyst is (3-5): (10-15):1, (2-3): 1-2.
Preferably, the catalyst is selected from one or more of n-propylamine, diethylamine, dimethylphenylphosphonium and tetrabutylammonium bromide.
Preferably, the preparation method of the blend of the ethylene-vinyl acetate copolymer and JD919 amino tetrafunctional epoxy resin comprises the following steps:
1) dissolving JD919 amino tetrafunctional group epoxy resin and chloromethyl trimethyl silane in N, N-dimethylformamide, stirring and reacting for 4-6 hours at room temperature, then performing rotary evaporation to remove the solvent, washing the crude product with diethyl ether for 5-8 times, and then placing the crude product in a vacuum drying oven to be dried for 13-18 hours at the temperature of 70-80 ℃ to obtain quaternized JD919 amino tetrafunctional group epoxy resin;
2) putting the quaternary amination JD919 amino tetrafunctional group epoxy resin prepared in the step 1) and the ethylene-vinyl acetate copolymer into a high-speed mixer, uniformly mixing to obtain a mixture, putting the mixture into a double-screw extruder, and extruding and molding to obtain the blend of the ethylene-vinyl acetate copolymer and the JD919 amino tetrafunctional group epoxy resin.
Preferably, the mass ratio of the JD919 aminotetrafunctional epoxy resin, the chloromethyltrimethylsilane and the N, N-dimethylformamide in the step 1) is (2-4):1 (10-15).
Preferably, the mass ratio of the quaternized JD919 amino tetrafunctional group epoxy resin to the ethylene-vinyl acetate copolymer in the step 2) is 1 (2-4).
Preferably, the preparation method of the high weather resistance solar cell back sheet comprises the following steps:
s1, placing the first weather-resistant layer, the insulating barrier layer and the second weather-resistant layer into a plasma cavity, and respectively carrying out corona treatment for 15-35 minutes under the power of 120-;
and S2, sequentially laminating the first weather-resistant layer, the adhesive layer, the insulating barrier layer, the adhesive layer and the second weather-resistant layer from inside to outside, laminating the laminated layers by using a laminating machine at the temperature of 110-150 ℃, curing at room temperature for 1-2 days, and obtaining the high weather-resistant solar cell backboard.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
1) the preparation method of the high-weather-resistance solar cell back plate provided by the invention has the advantages of simple and feasible process, easily available raw materials, low price, low requirements on equipment and reaction conditions, and suitability for large-scale production.
2) The high-weather-resistance solar cell back plate provided by the invention overcomes the technical problems that the traditional solar cell back plate in the prior art is high in price, poor in interlayer peeling strength, easy to fall off, low in electrical insulation, poor in adhesion and weather resistance, easy to embrittle and tear and incapable of meeting the requirements of high-end products, and has excellent weather resistance, electrical insulation performance, oxidation resistance, moisture resistance, and long-term prevention of hydrolysis performance and barrier property of an adhesive.
3) The high-weather-resistance solar cell back plate provided by the invention adopts the blend of the ethylene-vinyl acetate copolymer and the JD919 amino tetrafunctional group epoxy resin as the bonding layer, and the carboxylic acid group on the side chain of the ethylene-vinyl acetate copolymer is fixedly connected with the JD919 amino tetrafunctional group epoxy resin through an ionic bond, so that the compatibility between the two materials can be improved, and the comprehensive performance is improved; in addition, the epoxy resin composition combines the advantages of the ethylene-vinyl acetate copolymer and JD919 amino four-functional group epoxy resin blend, has strong cohesive force, good weather resistance, oxidation resistance and heat resistance, and is not easy to fall off, thereby prolonging the service life of the solar cell.
4) According to the high-weather-resistance solar cell backboard provided by the invention, the silafluorene structure, the fluorine-containing structure, the cyano structure and the like are introduced into the weather-resistant layer, so that the comprehensive performance matrix material of the backboard can be effectively improved, the triazole is introduced through click reaction, the ultraviolet aging resistance is improved, the sulfur radical is introduced, the crosslinking effect is realized in the polymer, and the mechanical property and the chemical stability of the material are improved.
Detailed Description
In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention more comprehensible, the present invention is further described with reference to the following examples. The examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.
The JD919 amino tetrafunctional group epoxy resin used in the following examples of the present invention was obtained from Jianshend materials science and technology Co., Ltd, in Hunan, and other raw materials were obtained from the chemical reagents Co., Ltd, of the national drug group.
Example 1
A solar cell backboard with high weather resistance sequentially comprises a first weather-resistant layer, an insulating barrier layer and a second weather-resistant layer from inside to outside, wherein the first weather-resistant layer is bonded with the insulating barrier layer and the insulating barrier layer is bonded with the second weather-resistant layer through bonding layers; the first weather-resistant layer and the second weather-resistant layer are both silicon fluorene fluorine-containing resin material layers; the insulation barrier layer is a polyethylene terephthalate (PET) layer; the adhesive layer is a blend layer of ethylene-vinyl acetate copolymer and JD919 amino tetrafunctional group epoxy resin.
The preparation method of the silafluorene fluororesin material comprises the following steps:
1) dissolving 10g of methylvinyl silafluorene, 3g of butadiene, 10g of hexafluorobutyl methacrylate, 5g of 2-vinyl isonicotinic nitrile, 0.1g of sodium dodecyl benzene sulfonate and 0.1g of azobisisobutyronitrile in 100g of dimethyl sulfoxide, stirring and reacting for 2.5 hours at 60 ℃ in a nitrogen atmosphere, then precipitating in ethanol, and placing in a vacuum drying oven for drying for 10 hours at 75 ℃ to obtain a silicofluorene fluorine-containing copolymer;
2) dissolving 9g of the silicofluorene fluorine-containing copolymer prepared in the step 1) in 30g of N-methylpyrrolidone, adding 3g of 3-phenyl-1, 2, 4-triazole-5-thiol, 6g of methanol and 3g of N-propylamine, stirring and reacting for 0.5 hour at 40 ℃, then precipitating in ethanol, washing the product for 4 times by using ethyl acetate, and then placing in a vacuum drying oven to dry for 10 hours at 75 ℃ to obtain the silicofluorene fluorine-containing resin material.
The preparation method of the ethylene-vinyl acetate copolymer and JD919 amino four-functional group epoxy resin blend comprises the following steps:
1) dissolving 20g of JD919 amino tetrafunctional group epoxy resin and 10g of chloromethyl trimethylsilane in 100g of N, N-dimethylformamide, stirring and reacting for 4 hours at room temperature, then performing rotary evaporation to remove the solvent, washing the crude product for 5 times by using diethyl ether, and then placing the crude product in a vacuum drying oven for drying for 13 hours at 70 ℃ to obtain quaternized JD919 amino tetrafunctional group epoxy resin;
2) putting 20g of the quaternary amination JD919 amino tetrafunctional group epoxy resin prepared in the step 1) and 40g of the ethylene-vinyl acetate copolymer into a high-speed mixer, uniformly mixing to obtain a mixture, and putting the mixture into a double-screw extruder for extrusion molding to obtain the ethylene-vinyl acetate copolymer and JD919 amino tetrafunctional group epoxy resin blend.
The preparation method of the solar cell backboard with high weather resistance comprises the following steps:
s1, placing the first weather-resistant layer, the insulating barrier layer and the second weather-resistant layer into a plasma cavity, and respectively carrying out corona treatment for 15 minutes under the power of 120W;
and S2, sequentially laminating the first weather-resistant layer, the adhesive layer, the insulating barrier layer, the adhesive layer and the second weather-resistant layer from inside to outside, laminating the laminated layers by using a laminating machine at 110 ℃, curing at room temperature for 1 day, and obtaining the solar cell backboard with high weather resistance after curing.
Example 2
A solar cell backboard with high weather resistance sequentially comprises a first weather-resistant layer, an insulating barrier layer and a second weather-resistant layer from inside to outside, wherein the first weather-resistant layer is bonded with the insulating barrier layer and the insulating barrier layer is bonded with the second weather-resistant layer through bonding layers; the first weather-resistant layer and the second weather-resistant layer are both silicon fluorene fluorine-containing resin material layers; the insulation barrier layer is a polyethylene terephthalate (PET) layer; the adhesive layer is a blend layer of ethylene-vinyl acetate copolymer and JD919 amino tetrafunctional group epoxy resin.
The preparation method of the silafluorene fluororesin material comprises the following steps:
3) dissolving 10g of methylvinylsiluorene, 3.5g of butadiene, 10g of hexafluorobutyl methacrylate, 6g of 2-vinyl isonicotinic nitrile, 0.15g of polyoxyethylene polyethylene glycerol ether and 0.15g of azodiisoheptanonitrile in 110g of N, N-dimethylformamide, stirring and reacting for 2.5-3.5 hours at 62 ℃ in a helium atmosphere, then precipitating in ethanol, and placing in a vacuum drying oven to dry for 12 hours at 78 ℃ to obtain a silicofluorene fluorine-containing copolymer;
4) dissolving 11g of the silicofluorene fluorine-containing copolymer prepared in the step 1) in 35g of N-methylpyrrolidone, adding 3g of 3-phenyl-1, 2, 4-triazole-5-thiol, 7g of methanol and 4g of diethylamine, stirring and reacting for 0.6 hour at 45 ℃, then precipitating in ethanol, washing the product for 5 times by using ethyl acetate, and then placing in a vacuum drying oven to dry for 12 hours at 80 ℃ to obtain the silicofluorene fluorine-containing resin material.
The preparation method of the ethylene-vinyl acetate copolymer and JD919 amino four-functional group epoxy resin blend comprises the following steps:
1) 25g of JD919 amino tetrafunctional group epoxy resin and 10g of chloromethyl trimethylsilane are dissolved in 120g of N, N-dimethylformamide, stirred and reacted for 5 hours at room temperature, then the solvent is removed by rotary evaporation, the crude product is washed by diethyl ether for 7 times, and then the crude product is placed in a vacuum drying oven for drying for 15 hours at 76 ℃ to obtain quaternized JD919 amino tetrafunctional group epoxy resin;
2) putting 20g of the quaternary amination JD919 amino tetrafunctional group epoxy resin prepared in the step 1) and 55g of the ethylene-vinyl acetate copolymer into a high-speed mixer, uniformly mixing to obtain a mixture, and putting the mixture into a double-screw extruder for extrusion molding to obtain the ethylene-vinyl acetate copolymer and JD919 amino tetrafunctional group epoxy resin blend.
The preparation method of the solar cell backboard with high weather resistance comprises the following steps:
s1, placing the first weather-resistant layer, the insulating barrier layer and the second weather-resistant layer into a plasma cavity, and respectively carrying out corona treatment for 20 minutes under the power of 130W;
and S2, sequentially laminating the first weather-resistant layer, the adhesive layer, the insulating barrier layer, the adhesive layer and the second weather-resistant layer from inside to outside, laminating the laminated layers by using a laminating machine at 120 ℃, curing at room temperature for 1.2 days, and obtaining the high-weather-resistance solar cell backboard after curing.
Example 3
A solar cell backboard with high weather resistance sequentially comprises a first weather-resistant layer, an insulating barrier layer and a second weather-resistant layer from inside to outside, wherein the first weather-resistant layer is bonded with the insulating barrier layer and the insulating barrier layer is bonded with the second weather-resistant layer through bonding layers; the first weather-resistant layer and the second weather-resistant layer are both silicon fluorene fluorine-containing resin material layers; the insulation barrier layer is a polyethylene terephthalate (PET) layer; the adhesive layer is a blend layer of ethylene-vinyl acetate copolymer and JD919 amino tetrafunctional group epoxy resin.
The preparation method of the silafluorene fluororesin material comprises the following steps:
1) dissolving 10g of methylvinyl silafluorene, 4.2g of butadiene, 10g of hexafluorobutyl methacrylate, 6.5g of 2-vinyl isonicotinic nitrile, 0.2g of nonylphenol polyoxyethylene ether and 0.2g of tert-butyl peroxybenzoate in 130g of N-methyl pyrrolidone, stirring and reacting for 3 hours at 63 ℃ in a neon atmosphere, then precipitating in ethanol, and placing in a vacuum drying oven for drying for 13 hours at 80 ℃ to obtain a silafluorene fluorine-containing copolymer;
2) dissolving 13g of the silafluorene fluorine-containing copolymer prepared in the step 1) in 38g of N-methylpyrrolidone, adding 3g of 3-phenyl-1, 2, 4-triazole-5-thiol, 7.5g of methanol and 4.5g of dimethylphenylphosphine, stirring and reacting for 0.8 hour at 46 ℃, then precipitating in ethanol, washing the product for 6 times by using ethyl acetate, and then placing in a vacuum drying oven for drying for 13 hours at 82 ℃ to obtain the silafluorene fluorine-containing resin material.
The preparation method of the ethylene-vinyl acetate copolymer and JD919 amino four-functional group epoxy resin blend comprises the following steps:
1) dissolving 30g of JD919 amino tetrafunctional group epoxy resin and 10g of chloromethyl trimethylsilane in 140g of N, N-dimethylformamide, stirring and reacting for 5.2 hours at room temperature, then performing rotary evaporation to remove the solvent, washing the crude product for 7 times by using diethyl ether, and then placing the crude product in a vacuum drying oven for drying for 16 hours at 77 ℃ to obtain quaternized JD919 amino tetrafunctional group epoxy resin;
2) putting 20g of the quaternary amination JD919 amino tetrafunctional group epoxy resin prepared in the step 1) and 70g of the ethylene-vinyl acetate copolymer into a high-speed mixer, uniformly mixing to obtain a mixture, and putting the mixture into a double-screw extruder for extrusion molding to obtain the ethylene-vinyl acetate copolymer and JD919 amino tetrafunctional group epoxy resin blend.
The preparation method of the solar cell backboard with high weather resistance comprises the following steps:
s1, placing the first weather-resistant layer, the insulating barrier layer and the second weather-resistant layer into a plasma cavity, and respectively carrying out corona treatment for 30 minutes under the power of 140W;
and S2, sequentially laminating the first weather-resistant layer, the adhesive layer, the insulating barrier layer, the adhesive layer and the second weather-resistant layer from inside to outside, laminating the laminated layers by using a laminating machine at 140 ℃, curing at room temperature for 1.8 days, and obtaining the high-weather-resistance solar cell backboard after curing.
Example 4
A solar cell backboard with high weather resistance sequentially comprises a first weather-resistant layer, an insulating barrier layer and a second weather-resistant layer from inside to outside, wherein the first weather-resistant layer is bonded with the insulating barrier layer and the insulating barrier layer is bonded with the second weather-resistant layer through bonding layers; the first weather-resistant layer and the second weather-resistant layer are both silicon fluorene fluorine-containing resin material layers; the insulation barrier layer is a polyethylene terephthalate (PET) layer; the adhesive layer is a blend layer of ethylene-vinyl acetate copolymer and JD919 amino tetrafunctional group epoxy resin.
The preparation method of the silafluorene fluororesin material comprises the following steps:
1) dissolving 10g of methylvinyl silafluorene, 4.6g of butadiene, 10g of hexafluorobutyl methacrylate, 9g of 2-vinyl isonicotinic nitrile, 0.25g of sodium dodecyl benzene sulfonate and 0.25g of dicyclohexyl peroxydicarbonate in 145g of N, N-dimethylformamide, stirring and reacting for 3.3 hours at 64 ℃ under an argon atmosphere, then precipitating in ethanol, and placing in a vacuum drying oven to dry for 14 hours at 83 ℃ to obtain a silafluorene fluorine-containing copolymer;
2) dissolving 14g of the silafluorene fluorine-containing copolymer prepared in the step 1) in 43g of N-methylpyrrolidone, adding 3g of 3-phenyl-1, 2, 4-triazole-5-thiol, 8g of methanol and 5.5g of tetrabutylammonium bromide, stirring and reacting for 0.9 hour at 48 ℃, then precipitating in ethanol, washing the product for 5 times by using ethyl acetate, and then placing in a vacuum drying oven to dry for 14.5 hours at 84 ℃ to obtain the silafluorene fluorine-containing resin material.
The preparation method of the ethylene-vinyl acetate copolymer and JD919 amino four-functional group epoxy resin blend comprises the following steps:
3) dissolving 38g of JD919 amino tetrafunctional group epoxy resin and 10g of chloromethyl trimethylsilane in 145g of N, N-dimethylformamide, stirring and reacting for 5.5 hours at room temperature, then performing rotary evaporation to remove the solvent, washing the crude product for 7 times by using diethyl ether, and then placing the crude product in a vacuum drying oven at 79 ℃ to bake for 17 hours to obtain quaternized JD919 amino tetrafunctional group epoxy resin;
4) putting 20g of the quaternary amination JD919 amino tetrafunctional group epoxy resin prepared in the step 1) and 75g of the ethylene-vinyl acetate copolymer into a high-speed mixer, uniformly mixing to obtain a mixture, and putting the mixture into a double-screw extruder for extrusion molding to obtain the ethylene-vinyl acetate copolymer and JD919 amino tetrafunctional group epoxy resin blend.
The preparation method of the solar cell backboard with high weather resistance comprises the following steps:
s1, placing the first weather-resistant layer, the insulating barrier layer and the second weather-resistant layer into a plasma cavity, and respectively carrying out corona treatment for 32 minutes under the power of 145W;
and S2, laminating the first weather-resistant layer, the adhesive layer, the insulating barrier layer, the adhesive layer and the second weather-resistant layer in sequence from inside to outside, laminating the laminated layers by a laminating machine at 145 ℃, curing for 2 days at room temperature, and obtaining the solar cell backboard with high weather resistance after curing.
Example 5
A solar cell backboard with high weather resistance sequentially comprises a first weather-resistant layer, an insulating barrier layer and a second weather-resistant layer from inside to outside, wherein the first weather-resistant layer is bonded with the insulating barrier layer and the insulating barrier layer is bonded with the second weather-resistant layer through bonding layers; the first weather-resistant layer and the second weather-resistant layer are both silicon fluorene fluorine-containing resin material layers; the insulation barrier layer is a polyethylene terephthalate (PET) layer; the adhesive layer is a blend layer of ethylene-vinyl acetate copolymer and JD919 amino tetrafunctional group epoxy resin.
The preparation method of the silafluorene fluororesin material comprises the following steps:
1) dissolving 10g of methylvinyl silicofluorene, 5g of butadiene, 10g of hexafluorobutyl methacrylate, 10g of 2-vinyl isonicotinic nitrile, 0.3g of nonylphenol polyoxyethylene ether and 0.3g of azodiisoheptanonitrile in 150g of N-methyl pyrrolidone, stirring and reacting for 2.5 hours at 65 ℃ in a nitrogen atmosphere, then precipitating in ethanol, and placing in a vacuum drying oven for drying for 15 hours at 85 ℃ to obtain a silicofluorene fluorine-containing copolymer;
2) dissolving 15g of the silicofluorene fluorine-containing copolymer prepared in the step 1) in 45g of N-methylpyrrolidone, adding 3g of 3-phenyl-1, 2, 4-triazole-5-thiol, 9g of methanol and 6g of N-propylamine, stirring and reacting for 1 hour at 50 ℃, then precipitating in ethanol, washing the product for 6 times by using ethyl acetate, and then placing in a vacuum drying oven to dry for 15 hours at 85 ℃ to obtain the silicofluorene fluorine-containing resin material.
The preparation method of the ethylene-vinyl acetate copolymer and JD919 amino four-functional group epoxy resin blend comprises the following steps:
5) dissolving 40g of JD919 amino tetrafunctional group epoxy resin and 10g of chloromethyl trimethylsilane in 150g of N, N-dimethylformamide, stirring and reacting for 6 hours at room temperature, then performing rotary evaporation to remove the solvent, washing the crude product for 8 times by using diethyl ether, and then placing the crude product in a vacuum drying oven for drying for 18 hours at the temperature of 80 ℃ to obtain quaternized JD919 amino tetrafunctional group epoxy resin;
6) putting 20g of the quaternary amination JD919 amino tetrafunctional group epoxy resin prepared in the step 1) and 80g of the ethylene-vinyl acetate copolymer into a high-speed mixer, uniformly mixing to obtain a mixture, and putting the mixture into a double-screw extruder for extrusion molding to obtain the ethylene-vinyl acetate copolymer and JD919 amino tetrafunctional group epoxy resin blend.
The preparation method of the solar cell backboard with high weather resistance comprises the following steps:
s1, placing the first weather-resistant layer, the insulating barrier layer and the second weather-resistant layer into a plasma cavity, and respectively carrying out corona treatment for 35 minutes under the power of 150W;
and S2, sequentially laminating the first weather-resistant layer, the adhesive layer, the insulating barrier layer, the adhesive layer and the second weather-resistant layer from inside to outside, laminating the laminated layers by using a laminating machine at 150 ℃, curing the laminated layers at room temperature for 2 days, and obtaining the solar cell backboard with high weather resistance after curing.
Comparative example
The present example provides a solar cell back sheet, the raw materials and the preparation method thereof are the same as in example 1 of the chinese patent CN 104835870B.
The solar cell back sheets obtained in the above examples 1 to 5 and comparative example were subjected to the test, and the test methods and the test results are shown in table 1.
Table 1 solar cell back sheet performance test results
Figure GDA0002147697890000101
As can be seen from table 1, the high-weatherability solar cell back sheet disclosed in the embodiment of the invention has more excellent ultraviolet aging resistance, weather resistance and insulation property, lower water transmittance and higher inter-film bonding strength compared with the solar cell back sheet in the prior art.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A solar cell backboard with high weather resistance is characterized by sequentially comprising a first weather-resistant layer, an insulating barrier layer and a second weather-resistant layer from inside to outside, wherein the first weather-resistant layer is bonded with the insulating barrier layer and the insulating barrier layer is bonded with the second weather-resistant layer through bonding layers; the first weather-resistant layer and the second weather-resistant layer are both silicon fluorene fluorine-containing resin material layers; the insulation barrier layer is a polyethylene terephthalate (PET) layer; the adhesive layer is a blend layer of ethylene-vinyl acetate copolymer and JD919 amino tetrafunctional group epoxy resin.
2. The highly weatherable solar cell backsheet according to claim 1, wherein the method for producing the silafluorene-based fluorine-containing resin material comprises the steps of:
1) dissolving methyl vinyl silafluorene, butadiene, hexafluorobutyl methacrylate, 2-vinyl isonicotinic nitrile, an emulsifier and an initiator in a high boiling point solvent, stirring and reacting for 2.5-3.5 hours at the temperature of 60-65 ℃ under the atmosphere of nitrogen or inert gas, then precipitating in ethanol, and placing in a vacuum drying oven to be dried for 10-15 hours at the temperature of 75-85 ℃ to obtain the silicofluorene fluorine-containing copolymer;
2) dissolving the silico-fluorene fluorine-containing copolymer prepared in the step 1) in N-methyl pyrrolidone, adding 3-phenyl-1, 2, 4-triazole-5-thiol, methanol and a catalyst, stirring and reacting for 0.5-1 hour at 40-50 ℃, then precipitating in ethanol, washing the product for 4-6 times with ethyl acetate, and then placing in a vacuum drying oven for drying for 10-15 hours at 75-85 ℃ to obtain the silico-fluorene fluorine-containing resin material.
3. The highly weatherable solar cell backsheet according to claim 2, wherein the mass ratio of the methylvinylsilfluorene, the butadiene, the hexafluorobutyl methacrylate, the 2-vinyl isonicotinic nitrile, the emulsifier, the initiator and the high boiling point solvent in step 1) is 1 (0.3-0.5) to 1 (0.5-1) to (0.01-0.03) to (10-15).
4. The highly weatherable solar cell backsheet according to claim 2, wherein the high boiling point solvent is one or more selected from the group consisting of dimethylsulfoxide, N-dimethylformamide, and N-methylpyrrolidone; the inert gas is selected from one or more of helium, neon and argon; the emulsifier is selected from one or more of sodium dodecyl benzene sulfonate, polyoxyethylene polyethylene glycol ether and nonylphenol polyoxyethylene ether; the initiator is selected from one or more of azobisisobutyronitrile, azobisisoheptonitrile, tert-butyl peroxybenzoate and dicyclohexyl peroxydicarbonate.
5. The highly weatherable solar cell backsheet according to claim 2, wherein the mass ratio of the silafluorene fluorine-containing copolymer, N-methylpyrrolidone, 3-phenyl-1, 2, 4-triazole-5-thiol, methanol, and the catalyst in step 2) is (3-5): 1 (10-15):1 (2-3): 1-2).
6. The highly weatherable solar cell backsheet as claimed in claim 2, wherein the catalyst is selected from one or more of n-propylamine, diethylamine, dimethylphenylphosphine, tetrabutylammonium bromide.
7. The highly weatherable solar cell backsheet according to claim 1, wherein the method for preparing the blend of ethylene-vinyl acetate copolymer and JD919 aminotetrafunctional epoxy resin comprises the following steps:
1) dissolving JD919 amino tetrafunctional group epoxy resin and chloromethyl trimethyl silane in N, N-dimethylformamide, stirring and reacting for 4-6 hours at room temperature, then performing rotary evaporation to remove the solvent, washing the crude product with diethyl ether for 5-8 times, and then placing the crude product in a vacuum drying oven to be dried for 13-18 hours at the temperature of 70-80 ℃ to obtain quaternized JD919 amino tetrafunctional group epoxy resin;
2) putting the quaternary amination JD919 amino tetrafunctional group epoxy resin prepared in the step 1) and the ethylene-vinyl acetate copolymer into a high-speed mixer, uniformly mixing to obtain a mixture, putting the mixture into a double-screw extruder, and extruding and molding to obtain the blend of the ethylene-vinyl acetate copolymer and the JD919 amino tetrafunctional group epoxy resin.
8. The highly weatherable solar cell backsheet according to claim 7, wherein the mass ratio of JD919 aminotetrafunctional epoxy resin, chloromethyltrimethylsilane, and N, N-dimethylformamide in the step 1) is (2-4):1 (10-15).
9. The highly weatherable solar cell backsheet as claimed in claim 7, wherein the mass ratio of the quaternized JD919 amino tetrafunctional epoxy resin to the ethylene-vinyl acetate copolymer in step 2) is 1 (2-4).
10. A method for producing the solar cell back sheet having high weatherability according to any one of claims 1 to 9, comprising the steps of:
s1, placing the first weather-resistant layer, the insulating barrier layer and the second weather-resistant layer into a plasma cavity, and respectively carrying out corona treatment for 15-35 minutes under the power of 120-;
and S2, sequentially laminating the first weather-resistant layer, the adhesive layer, the insulating barrier layer, the adhesive layer and the second weather-resistant layer from inside to outside, laminating the laminated layers by using a laminating machine at the temperature of 110-150 ℃, curing at room temperature for 1-2 days, and obtaining the high weather-resistant solar cell backboard.
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