Method for preparing ultra hydrophilic coat of titanium dioxide by using titanium trichloride as precursor

A technology of titanium dioxide and titanium trichloride, which is applied to coatings, devices for coating liquids on surfaces, special surfaces, etc., can solve the problems of small loading of titanium dioxide coatings, low photocatalytic activity, and complex processes, and achieves Short treatment time, high photocatalytic activity, and firm bonding

Inactive Publication Date: 2005-10-26
SHANGHAI JIAO TONG UNIV
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the traditional preparation methods of titanium dioxide coating are to form titanium dioxide film on the carrier through chemical reaction, the process is very complicated, and the loading of titanium dioxide coating on the surface of the carrier is small, resulting in low photocatalytic activity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of sol with titanium trichloride as precursor: add 10 ml of ammonia water to 20 ml of titanium trichloride solution to form black precipitate, filter the precipitate, wash and dry at room temperature. Take 1.25g of the above-mentioned black precipitate, add 20ml of hydrogen peroxide solution, add 70ml of distilled water during the reaction, and keep stirring. stand-by.

[0019] For small copper metal surfaces, first polish the surface with metallographic sandpaper, then wash it with 5% hydrochloric acid, acetone and pure water in sequence, and then dry it in the air. After the surface is dry, soak it in the hydrocolloid prepared by the above method, and then take it out slowly. When taking it out, let the coating surface be perpendicular to the liquid surface, and then let it dry naturally in the air.

[0020] After heating the dried copper metal with hydrocolloid coating under an infrared lamp at 150°C for 1 hour, the hydrocolloid forms a translucent coati...

Embodiment 2

[0023] Preparation of sol with titanium trichloride as precursor: add 45 ml of ammonia water to 20 ml of titanium trichloride solution to form black precipitate, filter the precipitate, wash and dry at room temperature. Take 4.2g of the above-mentioned black precipitate, add 60ml of hydrogen peroxide solution, add 50ml of distilled water during the reaction, and keep stirring. stand-by.

[0024] For large stainless steel surfaces, first polish the surface with metallographic sandpaper, then clean it with 5% hydrochloric acid, acetone and pure water in sequence, and then dry it in the air. After the surface is dry, paint the hydrocolloid prepared in the above method, let the coated surface be placed vertically, and then dry naturally in the air.

[0025] After the dried stainless steel metal surface with hydrocolloid coating is heated under an infrared lamp at 150°C for 1 hour, the hydrocolloid forms a translucent coating with a thickness of about 1 μm, and then placed under u...

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Abstract

The preparation method of titanium dioxide super-hydrophilic coating using titanium trichloride as precursor body includes the following steps: firstly, using titanium trichloride as precursor body, preparing titanium dioxide aqueous colloid with a certain concentration, using surface of metal copper, stainless steel or glass as carrier, adopting impregnation method or brush coating method to apply the titanium dioxide aqueous colloid on the surface of carrier, drying at proper temperature and irradiating by UV-light so as to form powder colloid coating layer with super-hydrophilic property on the carrier surface.

Description

technical field [0001] The invention relates to a method for preparing a titanium dioxide superhydrophilic coating. By preparing a titanium dioxide superhydrophilic colloid with titanium trichloride as a precursor, coating it on the surface of a carrier and performing subsequent treatment, the titanium dioxide The surface of the coated carrier has stable superhydrophilic properties. It belongs to the field of chemical engineering. Background technique [0002] As a photocatalyst, titanium dioxide has attracted people's attention in recent years because of its unique characteristics. Under the condition of ultraviolet light irradiation, titanium dioxide can use its strong oxidation ability to decompose different substances such as harmful gas molecules, bacteria and viruses, and convert them into harmless substances such as water and carbon dioxide, without secondary pollution. This characteristic of titanium dioxide has been applied to environmental purification, antibacte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00
Inventor 刘振华秋雨豪
Owner SHANGHAI JIAO TONG UNIV
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