Functional fluorine-containing microsphere and self-cleaning surface built by same

Abstract

The invention discloses a functional fluorine-containing microsphere and a self-cleaning surface built by the same. The high-dispersibility high-adhesion fluorine-containing microsphere disclosed by the invention is prepared by using the following method steps: reacting microspheres and a base amine catalyst with alpha-halogenated acyl bromide or alpha-halogenated acyl chloride to obtain a microsphere the surface of which is grafted with ATRP (atom transfer radical polymerization) initiator; carrying out ATRP random copolymerization or segmented polymerization reaction on the microsphere the surface of which is grafted with ATRP initiator, a monomer F and a monomer D so as to obtain a monomer D polymer microsphere, wherein the surface of the monomer D polymer microsphere is grafted with the monomer F and can perform D-A reaction; and reacting the monomer D polymer microsphere with an epoxy resin type polymer the terminal group of which is a compound A to obtain the fluorine-containingmicrosphere having high dispersibility and high adhesion. The self-cleaning surface disclosed by the invention is obtained by dissolving the fluorine-containing microsphere having high dispersibilityand high adhesion into a low-boiling-point solvent, then adding an epoxy resin solidifying agent E for evenly mixing and spraying a mixture on the surface of a substrate material and drying in vacuum. According to the invention, the use of a fluorine-containing solvent is avoided in the self-cleaning surface, and the obtained self-cleaning surface has strong adhesion on the surface of the substrate material.

Description

technical field [0001] The invention belongs to the field of macromolecular superamphiphobic materials, and in particular relates to a functional fluorine-containing microsphere with high dispersibility and cohesiveness and a preparation method thereof, and a self-cleaning functional surface constructed by the fluorine-containing microsphere. Background technique [0002] Superhydrophobic surfaces refer to those solid surfaces with surface static contact angles greater than 150°. This special hydrophobic state (property) is called superhydrophobic state (property). 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. [0003] Superamphiphobic materials can be widely used in all aspects of production and life such as building materials, electricity, military, textiles, leather, packaging materials, kitchen and bathroom utensils, oil pipelin...

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Problems solved by technology

However, the fluorine-containing nano-microspheres in this patent 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

[0013] In short, although the current international articles and patents mention that super-amphiphobic materials have excellent properties, there are no real large-scale industrial products in related fields, mainly because some problems in industrial applications have not been solved: (1) fluorine-containing Dispersion of microspheres: Due to the low surface energy of fluoropolymers, it is difficult to dissolve in most non-fluorinated solvents, so it is necessary to use fluorine-containing solvents to realize the dispersion of fluorine-containing nano-microspheres

However, fluorine-containing solvents are not only expensive, but also toxic, which is not conducive to construction and environmental protection.

(2) Adhesiveness of fluorine-containing microspheres: The surface of the super-amphiphobic nano-microspheres prepared in the current reported patents and literatures are all fluorine-containing polymers, without adhesive functional groups, so the prepared super-amphiphobic nanospheres The hydrophobic nano-microspheres have the disadvantage of poor adhesion

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