Water dispersible super-amphiphobic microsphere, preparation method and application thereof

Abstract

Belonging to the field of super-amphiphobic materials, the invention discloses a water dispersible super-amphiphobic microsphere, a preparation method and application thereof. According to the invention, an epoxy resin layer A is introduced to a substrate microsphere surface, a lot of epoxy groups exist on the surface of the epoxy resin A, during adhering to the substrate microsphere surface, parts of epoxy groups undergo cross-linking to make a polymer anchored on the microsphere surface, then parts of the epoxy groups undergo ring-opening reaction to graft a hydrophilic compound B and a fluorine-containing compound C, thus obtaining the water dispersible super-amphiphobic microsphere. The super-hydrophobic microsphere is prepared into a paint to coat the substrate surface, epoxy groups that do not undergo reaction in the microsphere are subjected to cross-linking with the substrate under the action of a catalyst, thus obtaining a super-amphiphobic surface. The preparation method is simple and feasible. The prepared water dispersible super-amphiphobic microsphere has good water dispersibility, can avoid use of organic solvents harmful to the environment, can be combined with a variety of substrates firmly, and has universality. The obtained super-amphiphobic surface has very good scrub resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to the field of super-amphiphobic materials, and in particular relates to a water-dispersible super-amphiphobic microsphere and a preparation method and application thereof. Background technique [0002] Surface wettability is one of the important characteristics of solid surfaces. The wettability can be measured by the contact angle of water on the surface. Usually, the surface with a water contact angle of more than 150° and a rolling angle of less than 10° is called a superhydrophobic surface. The surface has a contact angle of more than 150° to oil, which can be considered as a superoleophobic surface. If the static contact angles of water and oil on a surface are both greater than 150° and the rolling angles are both less than 5°, the interface can be called a superamphiphobic interface. Superhydrophobic surfaces and superamphiphobic surfaces have a certain self-cleaning function, that is, surface pollutants such as dust can...

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Problems solved by technology

However, the treatment process of this method is cumbersome and requires high reagents and equipment, and the fluorine-containing microspheres need to be dispersed in a fluorine-containing solvent, and there are no adhesive groups on the surface, so the adhesion is not very strong.

[0008] In recent years, there have been many literatures and patents on the use of fluoropolymers to construct superhydrophobic and superoleophobic surfaces, but most of the current literature reports still have the following problems: (1) The relationship between the fluoropolymer and the surface of the substrate The weak adhesion leads to the friction resistance and washing resistance of the coating; (2) most methods have harsh conditions, cumbersome steps, high cost, and are not universal; (3) construct superhydrophobic and superoleophobic The fluoropolymers used are mainly oil-soluble. This oil-soluble fluoropolymer requires a large amount of organic solvents, which is not only expensive but also pollutes the environment, which is not conducive to large-scale industrialization.

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