Method for preparing photoinduced ultra hydrophilic automatically cleaning paint

Abstract

The invention provides a method for preparing a photoinduced ultra hydrophilic automatically cleaning paint, comprising the following steps: (1) preparing titanium dioxide suspension by using titanium hydroxide; (2) preparing cerium-doped anatase titanium dioxide for subsequent use; (3) placing waterless ethanol, ammoniacal liquor, distilled water and ethyl orthosilicate which is added later into a reactor and magnetic stirring uniformly; (4) magnetic stirring the mixed liquor prepared in step (3) for more than 3 h in a constant temperature bath of 80 DEG C to obtain silica sol; (5)mixing the cerium-doped anatase titanium dioxide prepared in step (2), silica sol prepared in step (4) with waterless ethanol and stirring uniformly to obtain the photoinduced ultra hydrophilic automatically cleaning paint. The photoinduced ultra hydrophilic automatically cleaning paint has the advantages of simple use and convenient. The preparation method has the advantages of low energy consumption, saving heat treatment equipment, and low cost.

Description

technical field [0001] The invention relates to a preparation method of nano-titanium dioxide photoinduced superhydrophilic self-cleaning coating. Background technique [0002] The photoinduced superhydrophilic self-cleaning film is made of nano-titanium dioxide (TiO 2 ) The super-hydrophilic self-cleaning coating is applied to the coating film formed on glass, tiles, building exterior walls and other substrates. It not only has the function of killing microbes in the pollutants adsorbed on the surface of the paint film under the light of a certain wavelength, so as to achieve the purpose of self-cleaning, but also has good hydrophilicity. After the paint film is applied, the dust and other dirt adsorbed on the surface of the paint film can be washed away with the rain by the scouring of rainwater, achieving the effect of automatically removing stains on the exterior wall of the building. Therefore, since nano-titanium dioxide superhydrophilic self-cleaning coatings came i...

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Problems solved by technology

However, since the anatase titanium dioxide film prepared by this method must be obtained by putting the substrate coated with titanium dioxide sol (called coating in this case) into a muffle furnace for heat treatment, therefore, for buildings that cannot be heat treated As far as the exterior wall is concerned, the preparation method and products are not applicable

Obviously, even for some glass, tiles, etc. that can be heat-treated, because the coating needs to be subjected to final heat treatment to obtain a self-cleaning super-hydrophilic film, it is inconvenient to use, increases energy consumption, and increases Insufficient production cost

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