Method for preparing high-activity titanium dioxide film self-cleaning glass material

Abstract

The method for preparing high-activity titanium dioxide film self-cleaning glass material, applicable to the fields of building glass, car glass and optical glass, uses general glass as base body forcoating film and includes the following steps: cleaning glass surface, drying, sweeping with nitrogen gas, sol preparation, impregnating and coating, drying, crystallization heat treatment, pickling and surface after-treatment. The sodium ion content of titanium dioxide film can be controlled in 0.3%, carbon content of film surface is reduced, surface hydroxy content is increased and the optical catalytic activity of glass can be greatly raised. Said invention adopts line production process, and can effectively control product quality.

Description

technical field [0001] The present invention relates to a glass obtained by depositing titanium dioxide on a flat glass substrate. More specifically, the present invention relates to a method for preparing a glass material coated with a titanium dioxide film by a sol-gel method and suitable for industrial production. Background technique [0002] People often use various cleaning agents to clean window glass, curtain wall glass or automobile glass. The reason is that it is difficult to use pure water to clean the organic pollutants on the glass surface due to the adhesion of organic pollutants in the air to the glass surface. The surface is clean and clean. If a layer of highly active transparent titanium dioxide film is coated on the surface of ordinary soda-lime glass, it is quite useful for self-cleaning of the glass surface and indoor and outdoor air purification. There are many methods for preparing transparent titanium dioxide thin fil...

AI Technical Summary

Problems solved by technology

However, this method cannot completely prevent sodium ions from diffusing into the titanium dioxide film, and the prepared titanium dioxide coated self-cleaning glass has low photocatalytic activity and no self-cleaning function.

[0003] GB patent specification 2026454B describes a method in which the coating chamber is placed above the hot float glass ribbon as it advances from the float tank, this method is difficult to control the coating quality, complex operation

[0004] Chinese Invention Patent Bulletin on April 24, 1996 disclosed a heat-treatable double-sided coated glass manufacturing method and its products, the announcement number is CN1121054, and its coating steps include glass substrate-cleaning-drying-and sol-gel method coating, its photocatalytic activity is not high

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