CN108493279B - Hydrophobic water-resistant solar cell back plate based on coating technology and preparation method - Google Patents
Hydrophobic water-resistant solar cell back plate based on coating technology and preparation method Download PDFInfo
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- CN108493279B CN108493279B CN201810315097.3A CN201810315097A CN108493279B CN 108493279 B CN108493279 B CN 108493279B CN 201810315097 A CN201810315097 A CN 201810315097A CN 108493279 B CN108493279 B CN 108493279B
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- 238000000576 coating method Methods 0.000 title claims abstract description 51
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- 230000002209 hydrophobic effect Effects 0.000 title claims abstract description 26
- 238000005516 engineering process Methods 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000011737 fluorine Substances 0.000 claims abstract description 23
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 23
- 239000012948 isocyanate Substances 0.000 claims abstract description 23
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 19
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 19
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 15
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- 239000000758 substrate Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 5
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- 239000003795 chemical substances by application Substances 0.000 claims description 16
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- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 1
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Images
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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
- H01L31/049—Protective back sheets
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/204—Applications use in electrical or conductive gadgets use in solar cells
-
- 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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- Chemical & Material Sciences (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Paints Or Removers (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to a hydrophobic waterproof solar cell backboard based on a coating technology and a preparation method thereof. The coating comprises a substrate and a coating, wherein the coating comprises acrylic resin, fluorine-containing polyorganosiloxane and isocyanate, and the isocyanate is fluorine-containing isocyanate. The beneficial effects are as follows: the hydrophobic and water-resistant solar cell backboard prepared by the method can effectively improve the weather resistance and the service life of the solar cell backboard.
Description
Technical Field
The invention relates to the field of solar cell back plates, in particular to a hydrophobic water-resistant solar cell back plate based on a coating technology and a preparation process thereof.
Background
In recent years, with the continuous consumption of fossil energy and the gradual exhaustion of fossil energy, solar energy is gradually entering people's lives as a green renewable energy source. The solar cell back plate can be positioned on the outermost layer of the solar cell module due to good mechanical property, insulativity and weather resistance, and effectively protects the solar cell from lasting and stable operation for more than 25 years.
Because the solar cell module is often erected in extreme environments such as high cold and high humidity, the solar cell back plate is affected by a damp environment, and an anticorrosive coating on the surface of the solar cell back plate is easy to hydrolyze, so that the weather resistance of the back plate is reduced, and the service life of the solar cell is seriously affected. Therefore, the development of a hydrophobic and water-resistant solar cell back sheet can certainly promote and accelerate the application and popularization of the solar cell technology.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a low-temperature curing and quick-drying type electron beam curing adhesive, a preparation method and a coating method thereof.
The invention provides a hydrophobic water-resistant solar cell back plate based on a coating technology, which adopts the following main technical scheme: comprises a substrate and a coating, wherein the coating comprises acrylic resin, fluorine-containing polyorganosiloxane and isocyanate.
The hydrophobic water-resistant solar cell back plate with strong structural safety based on the coating technology further comprises the following auxiliary technical scheme:
wherein the isocyanate is fluorine-containing isocyanate.
Wherein the structural formula of the fluorine-containing isocyanate is as follows:
wherein the fluorine-containing polysiloxane has a structural formula as follows:
wherein R and R' are fluorine-containing alkanes.
Wherein the structural formula of the acrylic resin is as follows:
-[CH2-CR′(COOR)]n-
wherein R and R' are alkyl or hydrogen.
The coating also comprises color paste, a dispersing agent, epoxy resin, a flatting agent, a catalyst and a solvent.
The coating comprises, by mass, 30-50% of acrylic resin, 9-15% of isocyanate compound, 15-25% of color paste, 0.1-0.5% of dispersing agent, 5-10% of organic silicon compound, 2-6% of epoxy resin, 1-3% of flatting agent, 0.5-1% of catalyst and 5-15% of solvent.
Wherein the color paste comprises barium sulfate and graphene.
The hydrophobic water-resistant solar cell backboard based on the coating technology provided by the invention has the following technical effects:
according to the invention, the acrylic resin is used as matrix resin, the isocyanate containing fluorine or non-fluorine is used as a curing agent, the hydrophobicity and the water resistance of the surface of the solar cell backboard coating layer introduced with the organic siloxane containing fluorine are obviously improved, the water absorption of the coating layer is reduced, the film still keeps good weather resistance, and the hydrophobic water-resistant solar cell backboard prepared by the method can effectively improve the weather resistance and the service life of the solar cell backboard. Compared with the prior art, the hydrophobic water-resistant solar cell back sheet can reduce the water absorption from 20% to less than 10%.
The invention provides a preparation method of a hydrophobic water-resistant solar cell back plate based on a coating technology, which adopts the following main technical scheme: the method comprises the following steps:
1) putting acrylic resin, isocyanate, color paste, a dispersing agent, fluorine-containing polysiloxane, epoxy resin, a flatting agent, a catalyst and a solvent with preset mass into a reaction kettle with a stirrer, and stirring and dispersing at a stirring speed of 3000-4000 r/min for 8-20min to obtain the anticorrosive paint for the solar cell backboard;
2) taking out the coating obtained in the step 1), coating the coating on a PET (polyethylene terephthalate) base material by using a bar scraping or tape casting technology, and curing in an oven at 180 ℃ of 130-.
The preparation method of the color paste in the step 1) comprises the step of uniformly mixing preset mass of polybutylmethacrylate, titanium dioxide, polyethylene phthalimidine, n-butyl caproate, barium sulfate and graphene, and adding the mixture into a reaction kettle provided with a stirrer and a reflux condenser tube. And adding pickaxe beads in a volume ratio of 0.3-0.5, grinding at a speed of 3000-4000 r/min until the fineness of the color paste is less than 10 mu m, and filtering by using a 300-mesh filter screen to obtain the color paste.
The preparation method of the hydrophobic water-resistant solar cell back plate based on the coating technology provided by the invention has the following technical effects:
the preparation method has the advantages of simple process, convenient operation, safety, reliability, stable quality, high production efficiency and easy realization of large-scale industrial production. The existing production line is easy to update and integrate. The prepared solar backboard has good use effect.
Drawings
Fig. 1 is a schematic diagram illustrating the change of water absorption rate of the hydrophobic water-resistant solar cell backsheet according to the present invention.
Fig. 2 is a schematic diagram of a water contact angle of a solar cell back sheet of the prior art.
Fig. 3 is a schematic view of the water contact angle of the hydrophobic water-resistant solar cell backsheet of the present application.
Detailed Description
The present invention will be described in detail with reference to the following examples, which are intended to facilitate the understanding of the present invention and should not be construed as limiting in any way.
The embodiment of the hydrophobic water-resistant solar cell back panel based on the coating technology and the preparation method thereof comprises a substrate and a coating, wherein the coating comprises 30-50 wt% of acrylic resin, 9-15 wt% of isocyanate compound, 15-25 wt% of color paste, 0.1-0.5 wt% of dispersing agent, 5-10 wt% of organic silicon compound, 2-6 wt% of epoxy resin, 1-3 wt% of flatting agent, 0.5-1 wt% of catalyst and 5-15 wt% of solvent.
Preferably, the coating comprises, by mass, 40% of acrylic resin, 12% of isocyanate compound, 20% of color paste, 0.3% of dispersant, 7% of organosilicon compound, 4% of epoxy resin, 2% of leveling agent, 0.7% of catalyst and 10% of solvent.
The hydrophobic waterproof solar cell backboard prepared by the invention can effectively improve the weather resistance and the service life of the solar cell backboard.
Wherein, the isocyanate curing agent is a compound containing at least two-NCO groups in a molecule, such as one or more of poly (triallyl isocyanurate), TDI-TMP adduct, triphenylmethane triisocyanate, thiophosphoric acid tris (4-phenyl triisocyanate) and dimethyl triphenylmethane tetraisocyanate.
In order to better improve the tensile strength, impact strength and contact angle to water of the solar cell back sheet, the isocyanate is preferably a fluorine-containing isocyanate.
Most preferably, the fluorochemical isocyanate has the formula:
preferably, the fluorine-containing polyorganosiloxane has the structural formula:
wherein R and R' are fluorine-containing alkanes.
Preferably, the acrylic resin has the structural formula:
-[CH2-CR′(COOR)]n-
wherein R and R' are alkyl or hydrogen. Most preferably, the acrylic resin is one or a mixture of polymethyl acrylate, polyethyl acrylate, poly-n-butyl acrylate and polymethyl methacrylate.
Wherein the dispersant is one or more of polyvinylpyrrolidone, polyether derivatives, polyethylene glycol, alkylphenol polyoxyethylene, sorbitol alkylate or polyoxyethylene alkylphenol ether.
Wherein the epoxy resin is selected from one of bisphenol A epoxy resin, bisphenol F epoxy resin, polyphenol glycidyl ether epoxy resin, aliphatic glycidyl ether epoxy resin and glycidyl ester epoxy resin.
Wherein, the flatting agent is one or more of acrylic acid homopolymer, acrylic acid copolymer, fluorine modified acrylic acid flatting agent, phosphate modified acrylic acid flatting agent, polymethyl alkyl siloxane and fluorocarbon flatting agent.
Wherein the catalyst is one of dibutyltin dilaurate, stannous octoate, dibutyltin didodecyl sulfide and dibutyltin diacetate.
Wherein the solvent is one or more of N-butyl hexanoate, xylene, propylene glycol methyl ether acetate, toluene, anhydrous ethanol, acetone, butanone, ethyl acetate, methyl acetate, N-butanol, N-dimethylformamide and pyrrolidone.
Wherein the color paste comprises barium sulfate and graphene. The barium sulfate and the graphene are adopted, so that the surface energy is large, and a net structure can be formed when the coating is dried, so that the adsorption effect of the coating and a base material is enhanced, the coating is more compact, the adhesive force of the coating to the base material can be improved, and the impact resistance, the friction resistance, the thermal conductivity, the weather resistance and the corrosion resistance of the coating can be improved. Further improving the weather resistance of the coated backing sheet.
A preparation method of a hydrophobic water-resistant solar cell back plate based on a coating technology comprises the following steps:
1) putting acrylic resin, isocyanate, color paste, a dispersing agent, fluorine-containing polysiloxane, epoxy resin, a flatting agent, a catalyst and a solvent with preset mass into a reaction kettle with a stirrer, and stirring and dispersing for 10min at a stirring speed of 2500r/min to obtain the anticorrosive paint for the solar cell back plate;
the color paste is prepared by uniformly mixing polybutylmethacrylate, titanium dioxide, polyethylene phthalimidine, n-butyl caproate, barium sulfate and graphene in a preset mass, and adding the mixture into a reaction kettle provided with a stirrer and a reflux condenser pipe. And adding pickaxe beads in a volume ratio of 0.33, grinding at a speed of 3000r/min until the fineness of the color paste is less than 10 mu m, and filtering by using a filter screen of 300 meshes to obtain the color paste.
2) Taking out the coating obtained in the step 1), coating the coating on a PET (polyethylene terephthalate) substrate by using a bar scraping or tape casting technology, and curing in an oven at 150 ℃ for 2min to obtain the hydrophobic waterproof solar cell backboard.
Preferred embodiments are as follows:
preparing color paste: 48g of polybutylmethacrylate, 42g of titanium dioxide, 2g of polyethylene phthalimidine and 8g of n-butyl hexanoate are weighed according to the mixture ratio, mixed uniformly and added into a reaction kettle provided with a stirrer and a reflux condenser tube. And adding pickaxe beads with the volume ratio of about 1/3, grinding at 3000r/min until the fineness of the color paste is less than 10 mu m, and filtering by using a 300-mesh filter screen to obtain the color paste.
Preparing a solar cell back sheet: weighing 19g of polymethyl methacrylate, 43g of color paste, 1.5g of fluorocarbon leveling agent, 4.4g of bisphenol A epoxy resin, 1g of stannous octoate, 8g of fluorine-containing organic siloxane, 8.5g of triphenylmethane triisocyanate, 4g of n-butyl alcohol and 14.6g of propylene glycol methyl ether acetate according to the proportion, and stirring and dispersing for 10min at the speed of 2500r/min in a reaction kettle with a stirrer to obtain the anticorrosive coating for the solar cell backboard. And taking out a little of the coating, coating the coating on a PET (polyethylene terephthalate) substrate by using a No. 100 scraper bar, and curing in an oven at 150 ℃ for 2min to obtain the hydrophobic waterproof solar cell backboard.
The above-described embodiment is only one of the preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (7)
1. The hydrophobic water-resistant solar cell back plate based on the coating technology is characterized by consisting of a PET (polyethylene terephthalate) substrate and a coating coated on the PET substrate, wherein the coating comprises acrylic resin, fluorine-containing polyorganosiloxane and isocyanate;
the isocyanate is fluorine-containing isocyanate;
the structural formula of the fluorine-containing isocyanate is as follows:
or
The structural formula of the fluorine-containing polysiloxane is as follows:
wherein R and R' are fluorine-containing alkanes.
2. The hydrophobic and water-resistant solar cell back sheet based on coating technology as claimed in claim 1, wherein the acrylic resin has a structural formula:
-[CH2-CR′(COOR)]n-
wherein R and R' are alkyl or hydrogen.
3. The hydrophobic and water-resistant solar cell back sheet based on the coating technology as claimed in claim 1, wherein the coating further comprises a color paste, a dispersant, an epoxy resin, a leveling agent, a catalyst and a solvent.
4. The hydrophobic water-resistant solar cell back plate based on the coating technology as claimed in claim 3, wherein the coating comprises the following components in percentage by mass: 30 to 50 weight percent of acrylic resin, 9 to 15 weight percent of isocyanate compound, 15 to 25 weight percent of color paste, 0.1 to 0.5 weight percent of dispersant, 5 to 10 weight percent of organosilicon compound, 2 to 6 weight percent of epoxy resin, 1 to 3 weight percent of flatting agent, 0.5 to 1 weight percent of catalyst and 5 to 15 weight percent of solvent.
5. The hydrophobic and water-resistant solar cell back sheet based on the coating technology as claimed in claim 3, wherein the color paste comprises barium sulfate and graphene.
6. The method for preparing the hydrophobic water-resistant solar cell back sheet based on the coating technology according to any one of claims 1 to 5, comprising the steps of:
1) putting acrylic resin, isocyanate, color paste, a dispersing agent, fluorine-containing polysiloxane, epoxy resin, a flatting agent, a catalyst and a solvent with preset mass into a reaction kettle with a stirrer, and stirring and dispersing at a stirring speed of 3000-4000 r/min for 8-20min to obtain the anticorrosive paint for the solar cell backboard;
2) taking out the coating obtained in the step 1), coating the coating on a PET substrate by using a bar scraping or tape casting technology, and curing in an oven at 180 ℃ of 130-.
7. The preparation method according to claim 6, wherein the color paste in the step 1) is prepared by uniformly mixing preset mass of polybutylmethacrylate, titanium dioxide, polyethylene phthalimidine, n-butyl caproate, barium sulfate and graphene, and adding the mixture into a reaction kettle equipped with a stirrer and a reflux condenser tube; and adding pickaxe beads in a volume ratio of 0.3-0.5, grinding at a speed of 3000-4000 r/min until the fineness of the color paste is less than 10 mu m, and filtering by using a 300-mesh filter screen to obtain the color paste.
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