Polyaniline-graphene composite based anticorrosive paint and preparation method thereof

A composite material and anti-corrosion coating technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve problems that have not been reported before, and achieve the effects of simple preparation, high diameter-to-thickness ratio, and easy industrialized mass production.

Inactive Publication Date: 2012-07-25
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if polyaniline is loaded on the surface of graphene and used as a filler, it will provide excellent physical and chemical corrosion protection at the same time, thereby significantly improving the corrosion resistance of coatings. Related research has not yet been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prepare polyaniline / graphene composites as follows

[0029] a) Prepare a dispersion of graphene containing aniline and hydrochloric acid, wherein the concentration of aniline is 0.5 mol / L, the concentration of hydrochloric acid is 0.2 mol / L, and the concentration of graphene is (10 mg / mL). Stir evenly and pre-cool to 5°C .

[0030] b) Prepare an aqueous solution of ammonium persulfate containing hydrochloric acid, wherein the concentration of ammonium persulfate in the solution is 0.5 mol / L, and pre-cool it to 5° C., and the concentration of hydrochloric acid is 0.2 mol / L.

[0031] c) Slowly drop (b) solution into (a) solution under stirring, wherein the volume ratio of (a) solution to (b) solution is 1:1, react at 5°C for 1h, centrifuge, filter, wash and dry After grinding to less than 200 mesh, the polyaniline / graphene composite material is obtained.

[0032] Put 0.6 parts of dispersant (Disperbyk191), 1.2 parts of leveling agent (BYK 331), 1 part of defoamer (BYK 0...

Embodiment 2

[0034] Prepare polyaniline / graphene composites as follows

[0035] a) Prepare a graphene oxide dispersion containing aniline and hydrochloric acid, wherein the concentration of aniline is 1mol / L, the concentration of hydrochloric acid is 0.01mol / L, and the concentration of graphene oxide or graphene is (5mg / mL), pre-cool after stirring evenly to 10°C.

[0036] b) Prepare an aqueous solution of potassium persulfate containing hydrochloric acid, wherein the concentration of potassium persulfate in the solution is 1 mol / L, and the concentration of hydrochloric acid is 0.01 mol / L, and pre-cool it to 10°C.

[0037] c) Slowly drop (b) solution into (a) solution under stirring, wherein the volume ratio of (a) solution to (b) solution is 1:1, react at 10°C for 1 hour, centrifuge, filter, wash and dry After grinding to less than 200 mesh, the polyaniline / graphene oxide composite material is made.

[0038]Mix 0.6 parts of dispersant (Disperbyk191), 1.2 parts of leveling agent (BYK331)...

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Abstract

The invention provides polyaniline-graphene composite based anticorrosive paint and a preparation method thereof. The polyaniline-graphene composite based anticorrosive paint comprises, by weight, 20-90 parts of film former, 0.1-20 parts of polyaniline-graphene composite, 1-10 parts of pigment, 1-10 parts of filler, 0.1-3 parts of sag-proof agent, 0.1-4 parts of dispersant, 0.01-2 parts of flatting agent, 0.01-2 parts of defoaming agent, and 1-50 parts of solvent. The paint has good physical anticorrosion as graphene is high in radius-thickness ratio and high in flexibility and has electromechanical anticorrosion by the aid of polyaniline loaded on the surface of the graphene, and under synergism of the polyaniline and the graphene, the paint has fine metal corrosion resistance. The anticorrosive paint achieves passivation and corrosion inhibition of metal substrates, avoids use of heavy metals causing environmental pollution, such as chromium and the like, and is simple to prepare, low in cost and easy in industrial batch production.

Description

technical field [0001] What the present invention relates to is a kind of anticorrosion paint. The invention also relates to a preparation method of the anticorrosion paint. Background technique [0002] Mica powder, aluminum powder, and glass flakes with a scaly structure can reduce the permeability of the anti-corrosion coating and thus play a role in physical anti-corrosion. Therefore, they are often used as fillers in anti-corrosion coatings, for example (Chinese Patent No. ZL91111830 .6) The preparation method of glass flake anticorrosion coating is proposed. However, since this flake structure can only provide physical anti-corrosion and cannot achieve the ideal anti-corrosion effect, it is often used together with chromate and other electrochemical anti-corrosion pigments to improve the anti-corrosion effect of the coating. In recent years, polyaniline with oxidation-reduction potential has been found to passivate the metal surface, so it can replace chromium-based ...

Claims

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Application Information

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IPC IPC(8): C09D179/02C09D7/12C09D5/08C09D163/00
Inventor 范壮军魏彤闫俊王耀文
Owner HARBIN ENG UNIV
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