Method for preparing super-hydrophobic coating through water-based RAFT miniemulsion polymerization

Abstract

The invention discloses a method for preparing a super-hydrophobic coating through water-based RAFT miniemulsion polymerization, which comprises the following steps: by using water as a solvent and anamphiphilic reversible addition fragmentation chain transfer (RAFT) macromolecular reagent as a surfactant, synthesizing a polymer of an acrylate monomer and a terminated modified polysiloxane (PDMS)monomer by miniemulsion polymerization. The copolymer is controllable in molecular weight and high in silicon content, a polymer interpenetrating network is formed by adding a cross-linking agent, the contact angle of a coating of the copolymer on glass, wood, a steel plate, plastic and other base materials is larger than 150 degrees, the rolling angle of the coating is smaller than 10 degrees, and the coating has excellent hydrophobicity. The method is simple in preparation, water is used as a solvent, no emulsifier is contained, and fluorine, micro-nano particle potential hazards and organic solvent pollution are avoided. The coating is especially suitable for antifouling, anticorrosion, anti-icing, anti-fog and the like in the aerospace field.

Description

technical field [0001] The invention relates to the technical field of preparation of superhydrophobic coatings, in particular to a method for preparing superhydrophobic coatings through aqueous RAFT mini-emulsion polymerization. Background technique [0002] In recent years, domestic and foreign scientific research groups and industrial production industries have paid more and more attention to the research and development of new coating materials, especially bionic intelligent coating materials. Natural selection, the natural world has endowed researchers with extensive research inspiration. Inspired by biological characteristics such as the lotus leaf effect and water strider legs in nature, super-hydrophobic coatings have received extensive attention and research in recent years. Due to its special surface wettability and low surface energy, super-hydrophobic coatings have multi-functional comprehensive properties such as ice resistance, corrosion resistance, anti-foulin...

AI Technical Summary

Problems solved by technology

Due to the good stability of fluorine-containing compounds with long carbon chains, they are difficult to degrade naturally and have certain bioaccumulation, so they pose a potential serious threat to human health and the natural environment, which also makes perfluorooctanoic acid (PFOA) and perfluorinated Octane Sulfonyl Compounds (PFOS) Banned Worldwide

[0005] At present, although there are some reports of water-based fluorine-free superhydrophobic coatings, they are basically inorganic oxides as precursors to form organic-inorganic hybrid particles, which still cannot avoid the pollution caused by micro-nano particles.

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