Method for restoring ultra-hydrophilicity of titanium dioxide film by heat treatment
A super-hydrophilic, titanium dioxide technology used in the field of physical applications to achieve remarkable results
Inactive Publication Date: 2012-10-10
HEFEI UNIV OF TECH
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[0007] The present invention aims to provide a method for recovering the superhydrophilicity of titanium dioxide film through heat treatment, and the technical problem to be solved is to reduce or disappear the superhydrophilicity of TiO 2 Film regains its superhydrophilic properties
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[0015] Select a group of TiO with an initial hydrophilic diameter of 15mm and a hydrophilic diameter of 3mm after use 2 The film was annealed in air at different temperatures for 15 minutes, and its hydrophilic diameter was measured. The results are as follows: image 3 shown.
[0016] from image 3 It can be seen that the method of the present invention can effectively restore the hydrophilicity of the film, and the hydrophilicity of the film can be completely restored by annealing at 400° C., and the hydrophilic diameter is restored to 15 mm.
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The invention discloses a method for restoring ultra-hydrophilicity of a titanium dioxide film by heat treatment. The TiO2 film with reduced hydrophilicity or without hydrophilicity is subjected to annealing treatment in air for 10-15min at a temperature of 400-500 DEG C. According to the method, the hydrophilicity of the film can be effectively restored, the hydrophilicity of the film can be completely restored by the annealing treatment at the temperature of 400 DEG C, and the hydrophilic diameter is restored to 15mm. Therefore, the hydrophilicity of the film can be restored by a process that the film is heated to 400 DEG C in air for 10 minutes.
Description
1. Technical field [0001] The invention belongs to the technical field of physical application, in particular to a method for recovering the superhydrophilicity of a titanium dioxide film through heat treatment. 2. Background technology [0002] Nano-TiO with anatase structure 2 The film has superhydrophilicity, that is, water can be completely diffused on the surface of the film, and will not gather into droplets to affect people's sight. At the same time, TiO 2 The film has photocatalytic properties, that is, under the light that meets certain conditions, a series of chemical reactions occur on the surface of the film, which can degrade the organic matter on the surface of the film. TiO 2 Superhydrophilicity combined with photocatalytic performance of thin films coated with TiO 2 The surface of the film has anti-fog and self-cleaning functions. TiO 2 Films are widely used in building exterior walls, street lamps, car rearview mirrors, etc. [0003] Generally, the con...
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Inventor 方应翠张宽翔王文
Owner HEFEI UNIV OF TECH