Fluorine-free super-hydrophobic modified silicon dioxide composite resin coating and preparation method thereof

Abstract

The invention relates to the technical field of super-hydrophobic surface treatment, and particularly discloses a fluoride-free super-hydrophobic modified silicon dioxide composite resin coating, which is prepared from the following raw materials: modified hydrophobic silicon dioxide sol and an organic silica polymer, wherein the modified hydrophobic silicon dioxide sol is prepared from the following raw materials: tetraethyl orthosilicate, a first silane coupling agent and a second siloxane coupling agent, the first silane coupling agent is one of methyltriethoxysilane, hexamethyldisilazane and methyltrimethoxysilane which contain a methyl functional group, and the second siloxane coupling agent is hexadecyl trimethoxy silane containing medium and long carbon chains or n-octyl triethoxy silane containing medium and long carbon chains. The invention further provides a preparation method of the fluoride-free super-hydrophobic modified silicon dioxide composite resin coating, wherein the process is simple, the good cost advantage is achieved, and the prepared modified silicon dioxide composite resin coating has the super-hydrophobic characteristic while has good abrasion resistance.

Description

technical field [0001] The invention relates to the technical field of superhydrophobic surface treatment, in particular to a fluorine-free superhydrophobic modified silicon dioxide composite resin coating and a preparation method thereof. Background technique [0002] The preparation methods of superhydrophobic surface materials in the prior art, such as template method, electrospinning method, electrochemical method, phase separation method, etc., all need special expensive equipment, or the operation process is cumbersome, which increases the construction of superhydrophobic surface. The production cost restricts the feasibility of industrialized production. [0003] Moreover, most of the preparation processes or products of superhydrophobic surface materials in the prior art use solvent-based coatings and fluorine-containing materials. Solvent-based coatings have many disadvantages. They will continuously release volatile organic compounds during production and use, ser...

AI Technical Summary

Problems solved by technology

Solvent-based coatings have many disadvantages. They will continuously release volatile organic compounds during production and use, seriously endangering human health, and destroying the environment and affecting ecological balance.

The preparation process of fluorine-containing superhydrophobic surface materials is complex and costly

[0004] The preparation process of superhydrophobic surface materials in the prior art also uses water-based coatings, including water-based polyurethane, water-based acrylic acid and water-based polyamide, etc., but due to high film-forming temperature, poor water resistance or low mechanical properties, the scope of application has certain limitations. limitation

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