Preparation method of a modification-free and recyclable photothermally driven self-healing epoxy anti-corrosion coating material

Abstract

The invention belongs to the technical field of epoxy anti-corrosion coatings, and in particular relates to a preparation method of a photo-thermal driven self-repairing epoxy anti-corrosion coating material that is free from modification and recyclable. Acids are used as curing agents, and carbon materials are introduced as photothermal fillers to construct a catalyst-free epoxy-acid anhydride curing system, which is finally prepared by curing at a curing temperature of 110℃-130℃ for 4h-12h. The preparation process does not involve any organic solvents, no volatile organic compounds are generated, and is environmentally friendly; the required raw materials are all commercial existing products, and the preparation process does not require any chemical modification, and can be coated in various ways; the repair process of the coating is mainly based on Heating causes the material to undergo a solid-liquid phase transition, which has the advantages of fast and controllable response, and can be triggered in various ways.

Description

Fabrication of a modification-free and recyclable photothermal driven self-healing epoxy anticorrosion coating material backup method technical field The invention belongs to the technical field of epoxy anti-corrosion coatings, be specifically related to a kind of photothermal drive self-repair that is free from modification and recyclable Preparation method of composite epoxy anti-corrosion coating material. Background technique As a typical thermosetting resin, epoxy resin has excellent thermal stability, solvent resistance and adhesion. force, is widely used in the field of coating. Since epoxy resins are thermoplastic linear structural monomers before curing, their application The value is often realized by cross-linking with the curing agent and forming an infusible and insoluble cross-linked network, which also leads to its Non-recyclability, resulting in a great waste of materials. [0003] Epoxy coating, as one of the most effective means for preventing a...

AI Technical Summary

Problems solved by technology

This method has no direct effect on the "repairability" and "recyclability" of the coating resin itself, and has a greater impact on the mechanical properties of the coating

The second is the "intrinsic type", which relies on reversible dynamic chemical reactions (acylhydrazone bonds, disulfide bonds, Diels-Alder reactions) to achieve polymer self-healing, and this process often requires pre-modified epoxy monomers. sex, involving complex and expensive chemical processes

However, the above-mentioned technologies only realize the damage repair ability of epoxy coatings, but cannot solve the problem of "recyclability" of epoxy coatings.

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