Glass dustproof coating composition, dustproof coating dispersion liquid and product containing dustproof coating

Abstract

The invention relates to a glass dustproof coating composition, which comprises 5.0 to 50.0 wt% of polyurethane, 40.0 to 95.0 wt% of nano silicon dioxide with a particle size of 5 to 150 nm, 0.02 to 5.0 wt% of multifunctional aziridine and 0 to 30.0 wt% of a friction-resistant agent. The invention also relates to a dustproof coating dispersion liquid containing the glass dustproof coating composition, and a product with a dustproof coating. According to the invention, when the surface of glass is coated with the glass dustproof coating composition or the dustproof coating dispersion liquid, adurable antifouling and easy-to-clean dustproof coating can be formed; and particularly when the glass surface of a solar cell applied in a dusty environment is coated with the glass dustproof coatingcomposition or the dustproof coating dispersion liquid, the solar cell with the dustproof coating formed by the glass dustproof coating composition or the dustproof coating dispersion liquid providedby the invention can maintain high initial transmittance of sunlight and can improve power generation efficiency compared with a solar cell with no dustproof coating.

Description

technical field [0001] The present invention relates to the field of coating composition and solar power generation, more specifically to a kind of anti-dust coating composition for glass, anti-dust coating dispersion liquid containing the anti-dust coating composition for glass and glass anti-dust coating products, especially solar cells. Background technique [0002] As a renewable energy source, solar cells have huge social and economic benefits. However, dust collection on the surface is a serious problem faced by the solar cell industry, which seriously affects the power generation efficiency of solar cells. According to calculations, in a dusty environment, such as in the desert area of ​​Qatar, the average monthly efficiency loss due to dust collection is close to 15%, and in the case of no rain and no cleaning, the efficiency decay reaches 68% after 234 days; while in In the Chinese market, in 2012 alone, the loss of power generation due to battery surface contamin...

AI Technical Summary

Problems solved by technology

[0003] Although there are reports of stain-resistance and self-cleaning properties on glass surfaces using superhydrophilic or superhydrophobic coatings, successful commercial applications are rare.

It is known that the self-cleaning coating based on nano-silicon oxide has good anti-dust and rain-washing self-cleaning effects. However, due to the high surface energy, it is easy to absorb oily dirt, which brings limitations to practical applications; and for low surface Hydrophobic coatings with good performance are often difficult to clean due to the poor spreadability of water

Photocatalytic coatings can solve these problems in theory, but the refractive index of the coating is too high. When applied on the surface of the anti-reflection coating, the visible light projection rate will be significantly reduced, which limits its application range.

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