Superhydrophobic self-cleaning photovoltaic glass coating solution and coating process thereof

Abstract

The invention discloses a superhydrophobic self-cleaning photovoltaic glass coating solution and a coating process thereof. The superhydrophobic self-cleaning photovoltaic glass coating solution comprises the following components in parts by weight: 20 to 30 parts of waterborne fluorine-carbon emulsion, 25 to 35 parts of epoxy silicone oil, 15 to 25 parts of polysiloxane modified polyurethane, 6 to 12 parts of polytetrafluoroethylene, 5 to 7 parts of fullerene, 4 to 6 parts of titanium dioxide, 10 to 15 parts of a light anti-reflection agent, 2 to 8 parts of an oil removal agent, and 0.2 to 1part of a silane coupling agent, wherein the light anti-reflection agent comprises the following components by weight percent: 5 to 9 percent of yttrium lithium fluoride, 2 to 6 percent of magnesium fluoride, 0.7 to 1.5 percent of lithium tantalate, 0.3 to 0.5 percent of bismuth oxide, 2 to 8 percent of zirconium oxide, and 85 to 90 percent of silicon dioxide aerosol. The coating process comprisesthe following steps: atomizing the coating solution under the conditions of 25 to 35 MPa and at 100 to 120 DEG C, spraying at a flow rate of 0.3 to 0.45 g / s, and naturally curing when the to be deposited thickness reaches 0.25 to 0.3 mm. According to the superhydrophobic self-cleaning photovoltaic glass coating solution, the surface tension of glass can be reduced by virtue of a hydrophobic medium consisting of the waterborne fluorine-carbon emulsion, the epoxy silicone oil, polytetrafluoroethylene and the like, so that the dustproof and waterproof performance can be achieved; and the light transmittance of the film can be improved by utilizing the anti-reflection agent, and the scales can be removed by virtue of the fullerene / titanium dioxide nano composite.

Description

Technical field [0001] The invention relates to the technical field of glass surface treatment, in particular to a super-hydrophobic self-cleaning photovoltaic glass coating solution and a coating process thereof. Background technique [0002] Photovoltaic glass, also known as ultra-white glass, colorless glass, high-transparency glass or low-iron glass, is the most high-end glass product. In the wavelength range of 380nm-1100nm, the light transmittance can reach 92% or more. It is an important package for solar panels. material. With the development of the solar photovoltaic power generation industry, technical personnel in the field continue to update and improve the production process of light-absorbing silicon wafers, and crystalline silicon technology has reached its limit, and the improvement of photovoltaic conversion efficiency of solar cells has become a technical problem. [0003] Photovoltaic glass anti-reflection coating is a protective coating coated on the surface of...

AI Technical Summary

Problems solved by technology

In the prior art, the coating process of photovoltaic glass anti-reflection film is mainly divided into high-temperature sintering method and sol-gel method. The high-temperature sintering method consumes a lot of energy, the thickness of the film layer is not easy to control, the structure of the sol-gel film layer is not stable enough, and the compactness is poor. High porosity, many residual hydroxyl groups in the film layer, poor hydrophobicity and anti-fouling performance, in addition, photovoltaic glass is exposed to harsh environments for a long time, easily covered with dust, grease, etc., reducing light transmittance

[0004] The patent application number is CN201510526290.8, which discloses the preparation method of high-weather-resistant photovoltaic glass antireflection film coating solution, using ethyl orthosilicate, methyltriethoxysilane, absolute ethanol, isopropanol, deionized water , hydrochloric acid mutual reaction and aging to prepare the coating solution. The cured film layer can maintain a high transmittance in an 80% RH environment, but lacks anti-fouling and self-cleaning properties. When the photovoltaic glass is exposed outdoors for a long time, Oil and dust adhering to the surface of the AR coating will reduce the transmittance and affect the photoelectric conversion efficiency

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