Method for preparing high-performance fluoro-carbon anticorrosive coating through grafting of conducting polymer onto carbon nanotube

Abstract

The invention provides a method for preparing a high-performance fluoro-carbon anticorrosive coating. According to the method, a polyaniline conducting polymer grows on the surface of a carbon nanotube in situ, and a modified carbon nanotube grafting a polymer compatible with a fluoro-carbon resin onto the conducting polymer is used as an additive. Highly basic mechanical ball milling technology is employed for surface functionalization of the carbon nanotube so as to introduce a hydroxyl group onto the surface of the carbon nanotube; then under the action of a catalyst, the carbon nanotube and liquid ammonia undergo an ammonolysis reaction in a high pressure reactor, so an amino group is introduced onto the surface of the carbon nanotube; the surface aminated carbon nanotube is placed in a polymerization system of aniline, and a chemical oxidation method is employed for in-situ grafting of the polyaniline copolymer onto the surface of the carbon nanotube; and active groups on the polyaniline copolymer are used for grafting of short chains compatible with a coating and dispersed in the coating, so the high-performance fluoro-carbon anticorrosive coating is prepared. The prepared high-performance fluoro-carbon anticorrosive coating has good stability and conductive performance and has wide application prospects in the field of preparation of materials with conductive, antistatic, electromagnetic shielding and wave absorbing performance.

Description

[0001] technical field [0002] The invention belongs to the technical field of chemical industry, and in particular relates to a fluorocarbon conductive coating containing surface-modified carbon nanotubes and a preparation method thereof. Background technique [0003] Conductive coating is a functional material that has emerged with the rapid development of modern industry in recent years. It has a certain ability to conduct current and dissipate static charge. It has important applications in power transmission systems. [0004] Conductive coatings can be divided into additive type and structural type according to the mechanism. The formulation of additive conductive coating generally includes matrix resin, conductive filler, solvent or other additives. The matrix resin acts as a skeleton in the conductive coating, requiring small resistance changes and high stability, mainly including: epoxy resin, polyurethane, acrylic acid, alkyd resin, organic / inorganic silicon, cel...

AI Technical Summary

Problems solved by technology

Although the conductive polymer and carbon nanotubes are connected by chemical bonds through this method, the connection between carbon nanotubes and polyaniline in this structure is a non-conductive group, which interrupts the conductive channel between carbon nanotubes and conductive polymers. , reducing the conductivity of the material