Preparation method of conductive anticorrosive coating of modified graphene

Abstract

The invention discloses a preparation method of a conductive anticorrosive coating of modified graphene. The method comprises the steps that firstly, polyaniline is grafted to the surface of modified graphene in a conjugate mode, and the polyaniline is used as conductive filler and then forms the conductive anticorrosive coating with epoxy resin. The component A is prepared from 10 g of epoxy resin, 1.0-2.5 g of modified graphene powder, 0.1-0.3 g of fumed silica anti-settling agent, 10-30 ml of a mixing solvent, 0.01-0.03 g of polydimethylsiloxane defoaming agent, 0.03-0.05 g of a flatting agent and 0.04-0.06 g of a sodium dodecyl benzene sulfonate dispersing agent. The component B is prepared from 3-10 g of a curing agent and 3-10 ml of a mixing solvent. The mixing solvent comprises xylene and normal butanol, and the volume ratio of xylene to normal butanol is 7:3. The modified graphene is used as the filler, the conductive anticorrosive capacity of the coating can be greatly improved, and the great potential application value is achieved on the earth screen conducive and anticorrosive aspects.

Description

technical field [0001] The invention relates to a method for preparing a conductive anti-corrosion coating of modified graphene, in particular to preparing a two-component anti-corrosion coating with high conductivity by using polyaniline modified graphene as a raw material, specifically belonging to the technical field of chemical coatings . Background technique [0002] Conductive coatings are widely used in many fields such as power systems, oil refining industry, aerospace and electronic communication equipment, and their demand is gradually increasing. According to the mechanism of conductivity, conductive coatings can be divided into two types: structural type and blending type. Due to the complex process and high price of structural conductive coatings, blended conductive coatings have become the focus of research and development and industrialization of conductive coatings. However, the problems of high cost, high density and serious pollution of blended conductive ...

AI Technical Summary

Problems solved by technology

Patents (CN101108947A, CN1221768A, CN101935489A) successively introduced coatings with inorganic conductive fillers as conductive fillers. In order to reach their conductive standards, these coatings need to add a large amount of inorganic conductive fillers, and the compatibility of inorganic fillers and resins is poor, making The mechanical properties of the paint film are reduced; patents (CN102070960A, CN101368058A, CN101418122A) have introduced conductive polymers as conductive filler coatings successively. Although this type of coating has good compatibility, the cost is relatively high

Patents (CN1704191A, CN103122179A, CN103205174A) use metal powder as the conductive filler of the coating. This type of coating has excellent conductivity, but the cost is relatively high, and the corrosion resistance is not good, and the metal pollution is serious; the patent CN102179357A introduces the conductive polymer Aniline and inorganic attapulgite are uniformly mixed as conductive fillers for coatings. Although the cost and mechanical properties have been improved, the conductivity of the coatings is insufficient.

In the patent CN104592857A, the physical mixing of polyaniline and graphene is introduced as a conductive filler, which is applied to conductive coatings; while the patent CN104098944A introduces the method of graphene grafted polymers, which is applied to coatings, but the process conditions are harsh, which is not conducive to industrialization Production