Self-cleaning nano-oxide coating material preparation method

Abstract

The invention relates to a self-cleaning nano-oxide coating material preparation method. The method includes the steps: dissolving TiCl4 by the aid of distilled water and then dropping ammonium hydroxide into solution to adjust pH (potential of hydrogen); filtering, cleaning by the aid of water, adjusting an obtained matter by the aid of acid, heating and reflowing to obtain TiO2 hydrosol; respectively manufacturing SnO2 hydrosol and ZrO2 hydrosol by the aid of the same method and by taking SnCl4 and ZrOCl2 as raw materials respectively; dissolving tetraethoxysilane by the aid of absolute ethyl alcohol and then dropping the ammonium hydroxide into the solution to adjust the pH; mixing the solution at the indoor temperature to obtain SiO2 sol; respectively adding the TiO2 hydrosol, the SnO2 hydrosol and the ZrO2 hydrosol into the SiO2 ethanol sol, and mixing the hydrosol to obtain a hybrid sol coating material. The material prepared by the method has a super-hydrophilic performance, a self-cleaning function, durability, rub resistance and rapid drying performance, contaminant or dust can automatically fall off or can be degraded, and the material can be widely applied to surface coatings of materials such as glass and ceramics.

Description

technical field [0001] The invention relates to the preparation of a nanometer material, in particular to a method for preparing a self-cleaning nanometer oxide coating material. Background technique [0002] Self-cleaning surface refers to a surface on which pollutants or dust on the surface can automatically fall off or be degraded under the action of gravity, rain, wind and other external forces. It is based on the principle of super-hydrophilic self-cleaning. [0003] Nano-oxide materials have been a hot research topic for scientists from all over the world in recent years. Among them, nano-TiO 2 Self-cleaning glass has aroused great interest because of its unique superhydrophilic and photocatalytic properties. Anatase Nano TiO 2 The forbidden band width is 3.2eV. It has strong photocatalytic performance under ultraviolet light irradiation, and can almost decompose and adsorb all organic substances on its surface. It has unparalleled rapid, non-selective, stable and ...

AI Technical Summary

Problems solved by technology

[0005] Although many coatings have become commercial products, due to the limitations of preparation methods, mechanical strength of surface microstructure and materials, the practical application of super-hydrophilic surfaces is far from popular. The main bottlenecks are as follows: (1) There is a lack of simple, economical and environmentally friendly preparation methods, and most of the existing methods involve expensive instruments and equipment or complex processes, which are difficult to be used for the preparation of large-area super-hydrophilic surfaces; (2) the currently prepared The super-hydrophilic surface microstructure has poor mechanical strength, short service life, and is easily affected by external factors such as light and temperature, which cannot meet the requirements of long-term use.