Preparation method of highly-hydrophobic fluorocarbon coating for photovoltaic component back plate

A technology for photovoltaic modules and fluorocarbon coatings, used in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor compatibility between nanoparticles and fluorocarbon substrates, high curing temperature, easy agglomeration, etc., and achieve good antifouling effect. , Good compatibility, the effect of reducing moisture

Active Publication Date: 2015-04-22
HANGZHOU FIRST APPLIED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN1903961A discloses a self-cleaning fluorocarbon coating with lotus leaf effect. Nano fumed silica is directly added to the fluorocarbon coating. However, the compatibility between nanoparticles and fluorocarbon matrix is ​​poor, and the large surface energy of nanoparticles makes it easy to reunion
The recent patent CN103992701A proposes to modify the micro-nano structure on the surface of the nano-particle construction material by adding a coupling agent to the fluoropolymer emulsion to obtain a hydrophobic angle as high as 140°. However, it is only suitable for coating on the metal surface and the curing temperature is high. , high energy consumption

Method used

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Examples

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preparation example Construction

[0023] A method for preparing a highly hydrophobic fluorocarbon coating for a photovoltaic module backplane. The prepared fluorocarbon coating has a water contact angle of not less than 120° at 25°C, showing high hydrophobicity, and the water vapor of the backplane is permeable rate decreased significantly. The preparation method of this coating comprises the following steps:

[0024] (1) Mix the coupling agent, hydrolysis accelerator and deionized water according to the volume ratio of 0.1~2:0.5~5:10, then hydrolyze at room temperature for 0.5~8 h, add inorganic nanoparticles, and the inorganic nanoparticles and deionized The mass ratio of water is 0.1:1; under mechanical stirring, react at 60~100℃ for 0.5~6 h, after suction filtration, washing, drying, milling and filtering with 150 mesh screen to obtain hydrophobically modified nanoparticles ;

[0025] (2) Weigh 15-35 parts by weight of anhydrous diluent A and pour it into a sand mill, and add 30-45 parts by weight of flu...

Embodiment 1

[0055] (1) Hydrophobic modification of nanoparticles

[0056] Hydrolyze 50 mL of γ-aminopropyltriethoxysilane (KH550, Fangzhou Chemical Material Co., Ltd.) in 250 mL of methanol (Hangzhou Chemical Reagent Co., Ltd.) and 500 mL of deionized water at room temperature for 2 h, and mechanically stir in an 80°C water bath Add 50 g of silica (particle size: 15 ± 5 nm, Aladdin Reagent Co., Ltd.) for modification reaction for 3 h, cool to room temperature, filter with suction, wash, dry at 120 °C for 12 h, and then grind to obtain hydrophobically modified nanoparticles Silica powder, the powder is stored for later use after being filtered through a 150-mesh sieve;

[0057] (2) Weigh 15g butanone (Hangzhou Chemical Reagent Co., Ltd.) and pour it into a sand mill, and add 45 g (44.2 mmol OH group) fluorocarbon resin ZHM-2 (Dongfu Chemical), 17 g The hydrophobically modified silicon dioxide obtained in step (1) and 1.5g monobutyl triisooctoate tin catalyst (Shanghai Shifeng Biotechnolog...

Embodiment 2

[0061] (1) Hydrophobic modification of nanoparticles

[0062] Hydrolyze 100 mL of γ-(methacryloyloxy)propyltrimethoxysilane (KH570, Shanghai Haiqu Chemical Co., Ltd.) in 50 mL of carbon tetrachloride (Jinan Jiayu Chemical Co., Ltd.) and 1000 mL of deionized water at room temperature 8 h, in a 60°C water bath under mechanical stirring, add 100 g of nano-alumina (particle size: 10±5 nm, Aladdin Reagent Co., Ltd.) for modification reaction for 6 h, cool to room temperature, suction filter, wash, and dry at 120°C for 12 h. Grinding after h to obtain hydrophobically modified nano-alumina powder, the powder is filtered through a 150-mesh sieve and stored for later use;

[0063] (2) Weigh 20 g of propylene glycol methyl ether acetate (Hangzhou Chemical Reagent Co., Ltd.) into a sand mill, and add 40 g (42.8 mmol OH groups) of fluorocarbon resin GK570 (Dakin in Japan), 5 g of polyester DESMOPHEN1652 (Bayer, Germany), 20 g of hydrophobically modified nano-alumina obtained in step (1) ...

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Abstract

The invention provides a preparation method of a highly-hydrophobic fluorocarbon coating for a photovoltaic component back plate. The preparation method is suitable for outdoor coatings and in particular suitable for coated type photovoltaic back plates. The fluorocarbon coating consists of a component A and a component B in a mass ratio of (1-5):1, wherein the component A comprises fluorocarbon resin, hydrophobic modified nano-particles, a tin type catalyst and an anhydrous diluent A; and the component B comprises an isocyanate curing agent and an anhydrous diluent B. The nano-particles can be uniformly dispersed in main body resin after being subjected to coupling agent hydrophobic modification, is good in compatibility, and can form a micro-nano rough grain structure after being coated on a substrate; and by combining low surface energy of the fluorocarbon resin, the surface of the fluorocarbon coating has high hydrophobicity of a 'lotus leaf effect', has a good antifouling effect, and can greatly reduce influence of water drops on components. Meanwhile, the prepared fluorocarbon coating is excellent in weathering resistance, chemical resistance and salt spray resistance, so that the fluorocarbon coating is suitable for coated type photovoltaic component back plates and is good in performance.

Description

technical field [0001] The invention relates to a preparation method of a highly hydrophobic fluorocarbon coating, which is especially suitable for preparing a coated photovoltaic module backplane, and belongs to the technical field of material surface protection. Background technique [0002] As an important part of green and renewable energy, the photovoltaic industry has become the main method to solve the global energy crisis. Three or four years after the operation of large-scale photovoltaic power plants, the quality problems of photovoltaic modules due to the impact of water seeping into the modules have attracted more and more attention. As the support and protection material on the back of the solar cell, the solar cell backsheet has gradually attracted attention in the industry for its water resistance. If the surface has high hydrophobicity, it can reduce the accumulation of moisture on the backsheet surface, and reduce the internal components of the solar cell to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/12C09D175/04C09D175/06C09D7/12
CPCC08K2003/2241C09D127/12C08L2205/02C08L2205/03C09D7/62C08L75/04C08K13/06C08K9/06C08K3/36C08K3/04C08L75/06C08K2003/2227C08K9/04
Inventor 李景菲林维红俞仁杰周光大林建华
Owner HANGZHOU FIRST APPLIED MATERIAL CO LTD
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