Preparation method of self-cleaning coating

Abstract

The invention relates to the field of coatings, and discloses a preparation method of a self-cleaning coating. The preparation method comprises the following steps of adding a titanium source into anacetic acid solution, and performing stirring operation to completely dissolve the components to obtain a first mixed solution; enabling sodium tungstate and a surfactant to be added to the first mixed solution for stirring operation, so that the components are completely dissolved, and a second mixed solution is obtained; adding bismuth nitrate and citric acid into ethylene glycol, and performingstirring operation to completely dissolve the components to obtain a third mixed solution; adding the third mixed solution into the second mixed solution, and performing stirring operation to obtaina fourth mixed solution; and adding acrylic resin and a coupling agent into the fourth mixed solution, and performing stirring operation, so that the components are uniformly mixed to obtain the self-cleaning coating. The self-cleaning coating can absorb ultraviolet light and visible light waves at the same time, so that the utilization rate of the solar light waves is greatly increased, and therefore the self-cleaning function is greatly improved.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a preparation method of self-cleaning coatings. Background technique [0002] The surfaces of glass, ceramics, metal, and buildings are easily polluted by pollutants in the environment during use, which not only affects the appearance of the material, but also has a huge impact on the performance of the material. According to statistics, China's air pollution causes China's solar power generation to lose billions of dollars every year. The important reason is that traditional solar panels are easily adhered to pollutants in the air, which reduces the panel's ability to absorb solar energy. A large number of glass and building exterior walls in modern high-rise buildings are usually manually cleaned regularly, which is not only time-consuming and labor-intensive, but also safety concerns. [0003] In order to solve the above problems, people have developed self-cleaning coatings. Self-cl...

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Problems solved by technology

[0005] However, TiO 2 The energy band gap of the material is 3.2eV, which can only absorb ultraviolet light, and ultraviolet light only accounts for 3% to 5% of solar light waves. Therefore, based on TiO 2 The self-cleaning coating of the material can only use ultraviolet light, and the sunlight utilization efficiency is very low, and the antifouling and decontamination effects that can be achieved are not good

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