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Preparation method of nano coating for EVA (ethylene-vinyl acetate copolymer) film surface of solar packaged cell

A solar encapsulation and nano-coating technology, applied in conductive coatings, reflective/signal coatings, coatings, etc., can solve the problems of accelerated aging of EVA film, weakening of visible light, yellowing, etc., to improve the photoelectric conversion rate and adhesion. Good, easy-to-use effects

Active Publication Date: 2014-02-12
浙江兆泽实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to make the EVA film have a low yellowing rate and improve the high transmittance of the EVA film to visible light, thereby increasing the photoelectric conversion rate of the battery pack, three methods are usually used: the first one is to add ultraviolet light absorbers and light stabilizers , although the ultraviolet rays are shielded, the aging of the EVA film is accelerated because the energy absorbed by the ultraviolet rays is converted into heat energy; the second is to add antioxidants to eliminate the activity of the film produced by excessive cross-linking agents during use. Free radicals, because such free radicals will make the UV light absorber or (and) the light stabilizer generate new compounds with chromophores, resulting in yellowing; the third is to add infrared reflective nanoparticles to the film, However, while shielding infrared rays, there is a problem that visible light is partially weakened

Method used

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  • Preparation method of nano coating for EVA (ethylene-vinyl acetate copolymer) film surface of solar packaged cell

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The EVA film surface nano-coating of the present embodiment is made up of the following components:

[0030] Carbon Nanotubes 15g

[0031] Nano Silica 5g

[0032] Fatty alcohol polyoxyethylene ether 3g

[0033] Silane coupling agent 3g

[0034] Propylene Glycol Butyl Ether 3g

[0035] Absolute ethanol 71g;

[0036] The fatty alcohol polyoxyethylene ether is used as a dispersant, the silane coupling agent is used as a binder, and the propylene glycol butyl ether is used as a film-forming aid.

[0037] The preparation method of the nano-coating on the surface of the EVA film of the solar encapsulation battery of the present embodiment comprises the following specific steps:

[0038] A. Ingredients: weigh an appropriate amount of carbon nanotubes, nano-silica, fatty alcohol polyoxyethylene ether, silane coupling agent, propylene glycol butyl ether, ethanol, and water according to the above formula dosage, wherein the fatty alcohol polyoxyethylene ether As a dispersan...

Embodiment 2

[0044] The rest of the nano-coating on the surface of the EVA film of the present embodiment is the same as that of the embodiment 1, and the difference is:

[0045]The EVA film surface nano coating of the present embodiment is made up of following components:

[0046] Carbon nanotubes 20g

[0047] Nano silica 12g

[0048] Fatty alcohol polyoxyethylene ether 10g

[0049] Silane coupling agent 3g

[0050] Propylene Glycol Butyl Ether 4g

[0051] Propanol 50g;

[0052] The rest of the preparation method of the nano-coating on the surface of the solar energy encapsulating battery EVA film of this embodiment is the same as that of Example 1, except that in step D, the dispersion is ultrasonically oscillated at 20-40°C for 30 minutes and diluted 2 times After being applied to the surface of the EVA film, it is dried and cured.

Embodiment 3

[0054] The rest of the EVA film surface nano-coating of the present embodiment is identical with embodiment 1, and difference is:

[0055] The EVA film surface nano coating of the present embodiment is made up of following components:

[0056] Carbon nanotubes 19g

[0057] Nano silica 15g

[0058] Fatty alcohol polyoxyethylene ether 10g

[0059] Silane coupling agent 5g

[0060] Propylene Glycol Butyl Ether 5g

[0061] 46g of isopropanol;

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Abstract

The invention relates to a preparation method of a nano coating for an EVA (ethylene-vinyl acetate copolymer) film surface of a solar packaged cell. The nano coating comprises the following components by mass percent: 15-20% of carbon nano tube, 5-15% of nano silica, 3-15% of fatty alcohol-polyoxyethylene ether, 3-5% of silane coupling agent, 3-5% of propylene glycol butyl ether and 10-30% of organic solvent, wherein the mass ratio of fatty alcohol-polyoxyethylene ether to the silane coupling agent is (1:1)-(3:1); fatty alcohol-polyoxyethylene ether serves as a dispersing agent; the silane coupling agent serves as a binding agent; propylene glycol butyl ether serves as a film forming aid. A film covered by a coat formed by the nano coating for the EVA film surface has electrical conductivity and low yellowing rate and simultaneously improves the photoelectric conversion rates of battery packs. The preparation method is simple in process and convenient to operate and can be used for efficiently dispersing and fixing the carbon nano tube and the silica nano tube on the EVA film surface uniformly.

Description

technical field [0001] The invention relates to a preparation method of a nano-coating on the surface of an EVA film of a solar encapsulation battery, and belongs to the technical field of organic chemistry. Background technique [0002] Under the situation of global warming, deterioration of human ecological environment and shortage of conventional energy, the sustainable development strategy has been accepted by all countries in the world. Solar energy has the advantages of cleanliness, safety and resource adequacy. It is one of the most important new energy sources in the 21st century, and is valued and supported by governments around the world. In recent years, the photovoltaic market has expanded rapidly, and photovoltaic products are in short supply. [0003] At present, in the production process of solar cells, it is necessary to encapsulate the cells. The properties of the encapsulation material will largely determine the performance and lifetime of the solar cell ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/24C09D5/33C09D7/12C08J7/04C08L23/08
Inventor 顾正忠陈忠斌
Owner 浙江兆泽实业有限公司
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