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Low-conductivity flake graphene composite material, and preparation method and application thereof

A kind of technology of flake graphene and composite material, applied in low-conductive flake graphene composite material, its preparation and its application field, can solve the problems such as graphene cannot accelerate corrosion, coating spreading, etc., reach to improve spreading rate, improve corrosion resistance The effect of inhibiting chemical properties and electrochemical performance

Active Publication Date: 2014-09-10
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the defects in the prior art that graphene will accelerate corrosion after the coating fails and cannot spread well in the coating, the invention provides a method for preparing a low-conductivity flake graphene composite material, and provides A process for preparing modified organic anti-corrosion coating by using this material

Method used

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  • Low-conductivity flake graphene composite material, and preparation method and application thereof
  • Low-conductivity flake graphene composite material, and preparation method and application thereof
  • Low-conductivity flake graphene composite material, and preparation method and application thereof

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Embodiment 1

[0034] Step 1. Preparation of polyaniline / graphene oxide composite material: 0.36 g of graphene oxide was put into 180 mL of ethylene glycol, and the graphene oxide was completely peeled off by ultrasonication for 1 hour to form a graphene oxide dispersion. Slowly add 1 mL of aniline monomer to the dispersion, and form a stable single-layer graphene oxide / aniline dispersion under vigorous stirring. Thereafter, a solution prepared by 1.1 mL of concentrated HCl, 2.77 g of ammonium persulfate, and 20 mL of ethylene glycol was slowly added to the dispersion. The dispersion was polymerized in situ for 1 h under ice bath conditions. Finally, the resulting product was centrifuged and washed at least three times with deionized water to remove residual reactants.

[0035] Step 2. Preparation of the polyaniline / graphene composite material in an oxidized state with low conductivity flakes: the polyaniline / graphene oxide composite material prepared in step 1 was dispersed in 180 mL of de...

Embodiment 2

[0038] Step 1. Preparation of polyaniline / graphene oxide composite material: 0.3 g of graphene oxide was put into 180 mL of deionized water, and the graphene oxide was completely peeled off by ultrasonication for 2 hours to form a graphene oxide dispersion. Slowly add 0.5 mL of aniline monomer to the dispersion, and form a stable single-layer graphene oxide / aniline dispersion under vigorous stirring. Afterwards, a solution prepared by 1.1 mL of concentrated HCl, 2.77 g of ammonium persulfate, and 20 mL of deionized water was slowly added to the dispersion. The dispersion was polymerized in situ for 1 h under ice bath conditions. Finally, the resulting product was centrifuged and washed at least three times with deionized water to remove residual reactants.

[0039] Step 2. Preparation of the polyaniline / graphene composite material in an oxidized state with low conductivity flakes: the polyaniline / graphene oxide composite material prepared in step 1 was dispersed in 180 mL of ...

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Abstract

The invention provides a preparation method of a low-conductivity flake graphene composite material, a low-conductivity flake graphene composite material prepared by the method and application of the low-conductivity flake graphene composite material in preparing an anticorrosion coating. The method comprises the following steps: reacting graphene oxide with aniline, HCl and ammonium persulfate to obtain a polyaniline / graphene oxide composite material, reducing the graphene oxide in the composite material with KOH, and meanwhile, removing the polyaniline. The low-conductivity flake graphene composite material is applicable to preparing an anticorrosion coating. The oxidation-state polyaniline is introduced into the graphene surface to lower the conductivity of the graphene and enhance the corrosion resistance of the coating, and the graphene can not generate adverse interaction on the matrix after losing efficacy; the flake graphene has favorable spreading rate on the coating matrix; and the preparation process is simple, can easily implement industrialization, and has wide application prospects.

Description

technical field [0001] The invention relates to a preparation method of a low-conductivity flake graphene composite material and a preparation method for improving the corrosion resistance of an organic coating as a filler, which belongs to the field of material synthesis and the invention and application of high-performance anti-corrosion materials, and in particular relates to a chemical, marine Anti-corrosion coatings used for anti-corrosion linings of equipment and pipelines in the fields of petroleum, food, metallurgy, etc. Background technique [0002] Metal corrosion is a spontaneous process that has always brought serious losses and catastrophic accidents to human production and life. According to the statistics of developed countries, about 10-20% of metals are consumed due to corrosion every year, and the economic losses caused account for about 2-4% of the national economy. People have taken many measures to reduce the loss of corrosion, but so far the organic co...

Claims

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Application Information

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IPC IPC(8): C09C1/46C09C3/10C09D7/12C09D5/08
Inventor 刘贵昌孙文王立达武婷婷张开悦宗秋凤林乐圣
Owner DALIAN UNIV OF TECH
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