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Preparation method of super-hydrophilic self-cleaning glass

A super-hydrophilic and super-hydrophilic technology, applied in the field of preparation of super-hydrophilic self-cleaning glass, can solve the problems of expensive magnetron sputtering equipment, difficult to popularize and apply on a large scale, harsh operating conditions, etc. The effect of superhydrophilicity, reduced energy consumption, and simple equipment

Inactive Publication Date: 2009-09-23
张国栋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are various methods for depositing TiO on glass surfaces 2 However, the magnetron sputtering method and the sol-gel method that can be used in industrial production are mainly the magnetron sputtering method with expensive equipment and harsh operating conditions. The sol-gel method requires multiple film formations to achieve the desired effect. Thickness is required, and titanium organic compounds with higher prices are used as raw materials
The manufacturing costs of the above two methods are relatively high, and it is difficult to popularize and apply them on a large scale, thus providing a low-cost TiO 2 The manufacturing method of coated glass is of great significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Reacting metatitanic acid and hydrofluoric acid to prepare fluotitanic acid solution, and reacting silicon dioxide with hydrofluoric acid to prepare fluosilicic acid solution. Mix and dilute the two solutions until the concentration of titanium ions is 0.1M, and the concentration of silicon ions is 0.01M, neutralize with ammonia water to pH 2.0, add boric acid to make the concentration 0.3M, immerse the cleaned glass vertically in the above solution, Keep the solution temperature at 60°C, take it out after 2 hours of reaction, wash it and dry it at 120°C to get TiO 2 Coated Glass. The photohydrophilicity of coated glass is evaluated by the contact angle of water. A contact angle of less than 90° is called a hydrophilic substance, and a contact angle of less than 5° is called a superhydrophilic substance. The transparency of coated glass is expressed by the transmittance of visible light.

[0019] The freshly prepared TiO 2 The contact angle of the coated ...

Embodiment 2

[0020] Example 2: Change the concentration of fluorotitanic acid in the solution, keep other process conditions the same as in Example 1, and observe the influence of the concentration of fluorotitanic acid. The results show that when the concentration of fluorotitanic acid is lower than 0.01M, it is difficult to form a film, and when the concentration is greater than 0.5M, a large amount of TiO is formed 2 Powder precipitation not only causes waste of raw materials, but also poor uniformity of the film and weak combination with the substrate. When the concentration of fluorotitanic acid is 0.05-0.25M, Si-containing TiO that meets the requirements can be obtained. 2 membrane.

Embodiment 3

[0021] Example 3: In order to investigate the effect of the concentration of fluorosilicic acid in the solution on the coating quality, the ratio of silicon to titanium in the solution was changed, and other process conditions were kept the same as in Example 1. It was found that the photo-induced hydrophilicity of the coated glass increased with the increase of the silicon-titanium ratio in the solution. However, when the silicon-to-titanium ratio exceeds 0.2, the photohydrophilicity of the film decreases instead. The more favorable ratio of silicon to titanium is 0.05-0.15.

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PUM

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Abstract

The invention discloses a preparation method of super-hydrophilic self-cleaning glass and belongs to the technical field of film coating on glass. The provided preparation method adopts a liquid phase deposition method to deposit a photoinduced super-hydrophilic TiO2 membrane on glass surface, and uses metatitanic acid, silicon dioxide, hydrofluoric acid, ammonia, boracic acid and the like as the raw materials to prepare solution, wherein the concentration of titanium ion is 0.01-0.5M, the mol ratio of silicon and titanium is 0-1, the mol ratio of boron and titanium is 2-6, the pH value of the solution is 1.0-4.0; and a washed glass substrate is soaked in the solution vertically at the solution temperature of 20-80 DEG C, then taken out and washed after 1-20h of deposition, and air-dried at the temperature of 80-200 DEG C, thus obtaining the photoinduced super-hydrophilic TiO2 coated glass. The preparation method has the advantages of simple equipment, convenient operation, easily available raw materials, low cost, and the like.

Description

technical field [0001] The invention belongs to the technical field of glass coating, and in particular relates to a preparation method of superhydrophilic self-cleaning glass. technical background [0002] The cleaning of window and curtain wall glass of urban high-rise buildings is a heavy and dangerous work. If it is made of super-hydrophilic self-cleaning glass, the surface can be kept clean by washing with rain or tap water, thereby reducing labor intensity and avoiding danger. Since self-cleaning glass can decompose organic matter in the air and kill bacteria in the sun, the use of self-cleaning glass can also reduce the concentration of harmful substances in the air and improve urban air quality. [0003] If the windshield and rearview mirror of the car are made of super-hydrophilic glass, a uniform water film can be formed on the glass surface when it rains to keep it transparent, increasing driving safety. At the same time, due to the TiO on the superhydrophilic gl...

Claims

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Application Information

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IPC IPC(8): C03C17/25
Inventor 张国栋
Owner 张国栋
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