Glass surface dust repelling film and preparation method thereof

Abstract

The invention discloses a glass surface dust repelling film and a preparation method thereof. The film is a SnO2 / SiO2 composite film prepared by adopting a sol-gel technology. The preparation method comprises the following steps: a Sn chloride and a silicate organic matter which are respectively used as precursors of SnO2 sol and a SiO2 sol undergo alcoholysis hydrolysis, condensation, mixing andaging to obtain a dust-repellent sol; and the surface of a glass substrate is coated with the sol by using a pulling process, a spin-coating process and a spraying process, and the coated glass substrate is dried and heat-treated to obtain the SnO2 / SiO2 composite film with a remarkable dust-repellent effect and a high light transmittance. The glass surface dust repelling film can be applied to building glass, vehicle window glass and solar photovoltaic glass to greatly reduce the cleaning frequency of the glass, the use amount of a cleaning agent and water pollution caused by utilization of the cleaning agent. The prepared film has the advantages of uniform texture, adjustable physical properties such as electric conductivity and light transmittance, simple process, large coating area, lowcost, and easiness in large-scale production.

Description

technical field [0001] The invention relates to the technical field of sol-gel method coating, in particular to SnO on glass surface 2 / SiO 2 Dust removal film. Background technique [0002] Glass has been widely used in outdoor environments, such as architectural glass, car window glass, solar photovoltaic glass. The most important function of glass is to transmit light. The adhesion of dust is the most important reason for the reduction of light transmittance of outdoor glass. In addition to the adhesion of dust on the glass surface caused by natural wind and dust, with the rapid development of global industrialization, all kinds of industrial dust and dust emitted by motor vehicles have caused more serious and difficult to remove stains on outdoor glass. damage. A research report jointly released by the Bank of Asia and Tsinghua University pointed out that among the 500 megacities in China, more than 99% of them cannot meet the air quality standards of the World Heal...

AI Technical Summary

Problems solved by technology

Non-metallic particle (carbon black, graphite) antistatic and dust-repelling film, cheap, good selectivity, long-lasting conductivity, but poor compatibility and poor finish

Metal particle (Pt, Ag, Cu) antistatic and dust-repelling film, high activity, easy to oxidize, difficult to disperse, complicated process

In metal oxide semiconductors (ZnO, SnO 2 、In 2 o 3 and its doped oxide) in the antistatic and dust-repelling film, although the ZnO material is easy to form a film, the electrical properties of the film are not stable enough, the "self-compensation" effect is serious, and the stability of the p-type ZnO material is poor.

In 2 o 3 Lack of resources and high cost

SnO 2 The surface resistance of the film is 10 3 ~10 5 Ω / □, can not achieve good anti-static effect

Chinese patent CN106700675A discloses an antistatic and antifouling coating agent for exterior wall substrates and a preparation method thereof. The coating agent is composed of methanol, tin oxide, silicon dioxide and a solvent, and the tin oxide particles and silicon dioxide particles are both nanoscale. Difficult to disperse, expensive, not conducive to mass production

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