A self-healing superamphiphobic and photocatalytic dual self-cleaning coating and its preparation method

Abstract

The invention discloses a self-healing type super-amphiphobic and photocatalytic double self-cleaning coating and a method for preparing the same. Mixed solution with fluorine-polyhedral oligomeric silsesquioxane (F-POSS) and photocatalysis particles is coated on the surfaces of base materials to form the self-healing type super-amphiphobic and photocatalytic double self-cleaning coating. The self-healing type super-amphiphobic and photocatalytic double self-cleaning coating and the method have the advantages that the self-healing type super-amphiphobic and photocatalytic double self-cleaningcoating has super-hydrophobic and super-oleophobic super-amphiphobic performance, is capable of photocatalytically degrading organic pollutants adhered on the surfaces of the self-healing type super-amphiphobic and photocatalytic double self-cleaning coating, can be self-healed and can be placed at the room temperature or can be appropriately heated, and accordingly degradation of the super-amphiphobic performance due to long-time illumination can be repaired; the self-healing type super-amphiphobic and photocatalytic double self-cleaning coating is applicable to the surfaces of the base materials for glass, wood, building external walls, diversified textiles and the like with the requirements on self-cleaning functions.

Description

technical field [0001] The invention belongs to the field of surface coatings, in particular to a self-healing super-amphiphobic and photocatalytic double self-cleaning coating and a preparation method thereof. Background technique [0002] Self-cleaning coating refers to a functional coating that can automatically degrade or fall off organic pollutants or dust on the surface of the substrate under the action of sunlight or rain. Self-cleaning coatings can be used in various textiles, such as outdoor clothing, medical protective clothing, shoes and hats, tents, etc. Coating self-cleaning coatings on the surface of solar panels can effectively solve the problem of reduced efficiency of solar equipment caused by the accumulation of dust. If the glass curtain wall of a high-rise building is coated with a self-cleaning coating, it can not only reduce cleaning costs, but also reduce the risk of cleaning workers working at heights. In recent years, self-cleaning coatings have re...

AI Technical Summary

Problems solved by technology

[0006] Although in recent years, there have been the above-mentioned and other few researches on superhydrophobic and photocatalytic dual self-cleaning coatings, but at present this kind of coating has the following problems: 1) it is only superhydrophobic, that is, it only has waterproof effect, and No protection against oily liquids

Because photocatalytic surfaces are usually only able to decompose trace amounts of organic pollutants that are in close contact with the surface, if such superhydrophobic and photocatalytic dual self-cleaning coatings are contaminated with a large amount of oil, the self-cleaning ability will fail

2) While the photocatalytic effect removes surface organic pollutants, it will also cause the gradual degradation of low surface energy substances that contribute to superhydrophobic properties, resulting in a decline in superhydrophobic properties or complete failure

At present, the above problems have not been well resolved in the existing research work of superhydrophobic and photocatalytic dual self-cleaning coatings, resulting in narrow application of such coatings and low coating life

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