Super-amphiphobic composite coating, and preparation method and application thereof

Abstract

The invention provides a super-amphiphobic composite coating, and a preparation method and an application thereof. In the super-amphiphobic composite coating disclosed by the invention, a micro-nano hierarchical structure is constructed by the micron-sized particles and nano-sized particles, so that the wear resistance of the coating can be enhanced. A large amount of air is embedded into the constructed micro-nano hierarchical structure, a continuous air layer can be formed, and then the super-amphiphobic performance of the coating is improved. And meanwhile, the direct contact area between aliquid and the surface of the coating is greatly reduced by the constructed micro-nano hierarchical structure, so that the super-amphiphobic performance is improved. In the super-amphiphobic composite coating, a chemical and physical double-crosslinked polyurethane primer is synthesized through a condensation polymerization, the primer can be crosslinked and cured to form a polyurethane primer layer in a room-temperature environment, and micro-nano hierarchical structures are strongly adhered to the surfaces of various base materials. Hydrophilic groups in polyurethane chain segments enable polymer molecules to have good water solubility, so that the use of organic solvents can be reduced, the cost is saved, and the composite coating is green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a superamphiphobic composite coating and a preparation method and application thereof. Background technique [0002] Superamphiphobic refers to superhydrophobic and superoleophobic. A superamphiphobic surface refers to a material surface with a contact angle of more than 150° for water and oily liquids and a rolling angle of less than 10°. Compared with superhydrophobic surfaces, superamphiphobic surfaces not only have wider applications in antifouling, self-cleaning, drag reduction, metal anticorrosion, and anti-adhesion, but also in the fields of crude oil transportation, oil collection, and oil prevention. Unique application potential. [0003] Through the research, it is found that there are two main factors that affect the superphobic phenomenon on the surface of materials: low surface energy and rough structure. By using fluorinated compounds as low surface ...

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Problems solved by technology

Although the above method can prepare super-amphiphobic surfaces, the above-mentioned method is still limited to the laboratory stage, and many surfaces prepared by the above-mentioned method need to be cross-linked by high-temperature treatment before they have wear-resistant super-amphiphobic properties. Curing, and high temperature treatment consumes a lot of energy, which limits its wide application in substrates

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