Graphene modified epoxide anticorrosive coating and preparation method thereof

Abstract

The invention relates to the field of epoxide anticorrosive coatings, specifically to a graphene modified epoxide anticorrosive coating. The graphene modified epoxide anticorrosive coating is preparedfrom a component A and a component B, wherein the component A mainly comprises epoxy resin, a pigment, a filler, an additive and graphene dispersing liquid; the component B is a curing agent; the mass ratio of the graphene dispersing liquid to the component A is (6-12):100; the mass ratio of the component A and the component B is (6-8):1; the graphene dispersing liquid is prepared by compositinggraphene, a mixing solvent and a dispersing agent B; the mixing solvent is a mixture of xylene, cyclohexanone, butanol, glycol ether and ethylene glycol monoethyl ether acetate. According to the graphene modified epoxide anticorrosive coating, the mixing solvent is adopted, so that the graphene can be uniformly dispersed into the coating; the prepared coating is high in stability, and high in anti-corrosive performance.

Description

technical field [0001] The invention relates to the field of epoxy anticorrosion coatings, in particular to a graphene-modified epoxy anticorrosion coating and a preparation method thereof. Background technique [0002] Epoxy anti-corrosion coating is a commonly used anti-corrosion coating, which is generally used as a primer to coat metal surfaces, but the anti-corrosion performance of traditional epoxy anti-corrosion coatings is generally insufficient and needs to be improved. [0003] Graphene is a newly discovered carbon nanomaterial with a regular two-dimensional structure in recent years. Its huge specific surface area, chemical stability, and excellent barrier and adsorption properties make it a research hotspot for anti-corrosion coating additive materials in recent years. However, the dispersion of graphene in coatings is very poor. Its large surface tension brings strong van der Waals force and π-π bond interaction, which makes graphene very easy to agglomerate. Th...

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Problems solved by technology

However, the dispersion of graphene in coatings is very poor. Its large surface tension brings strong van der Waals force and π-π bond interaction, which makes graphene very easy to agglomerate. This kind of agglomeration not only cannot improve the anti-corrosion performance, but may be in the coating. The agglomeration forms permeation channels, accelerates the diffusion rate of water molecules or chloride ions in the coating, and reduces the mechanical properties and anti-corrosion properties of the coating

[0004] The current application of graphene in the field of coatings mostly adopts the method of surface grafting or in-situ polymerization in order to achieve good results. Although the problem of dispersion can be partially solved, due to the troublesome operation process and large-scale production, grafting is prone to unevenness. And different from the production and application habits of conventional coatings, which greatly limit the application of graphene in the field of anti-corrosion coatings

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