Preparation method of conductive anticorrosive coating of modified graphene

A conductive anti-corrosion, graphene technology, applied in anti-corrosion coatings, conductive coatings, epoxy resin coatings and other directions, can solve the problems of poor corrosion resistance, poor compatibility, unfavorable industrial production, etc., to improve compatibility , The effect of improving electrical conductivity and corrosion resistance

Inactive Publication Date: 2015-12-23
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 co

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of modified graphene

[0022] Take 5g of graphene oxide, add 50mL of concentrated ammonia water, stir and react at 30°C for 24h, then react at 70°C for 10h, filter, wash, and dry in vacuum to obtain aminated graphene. To the aminated graphene, add 5g of aniline and 20mL of isopropanol and water mixed solution, after ultrasonic vibration for 30min, add 20mL of hydrochloric acid solution with a concentration of 2mol / L; control the temperature of the system at 0~5℃ In an ice-water bath, dropwise add 1 mol / L ammonium persulfate aqueous solution with 0.8 times the molar amount of aniline, and stir for 6 hours. After the reaction, wash with absolute ethanol and distilled water, then filter with suction, and dry in vacuum to obtain modified graphene pink.

[0023] (2) Preparation of paint

[0024] 1) Heat and dissolve 10g of epoxy resin E20 into 15mL mixed solvent, then add 1.0g of modified graphene powder, 0.2g of fumed silica, 0.02g of defoamer, 0.03g of le...

Embodiment 2

[0030] (1) Preparation of modified graphene

[0031] Take 5g of graphene oxide, add 80mL of concentrated ammonia water, stir and react at 30°C for 24h, then react at 70°C for 10h, filter, wash, and vacuum dry to obtain aminated graphene. To the aminated graphene, add 8g of aniline and 30mL of isopropanol and water mixed solution, after ultrasonic vibration for 30min, add 15mL of hydrochloric acid solution with a concentration of 3mol / L; control the temperature of the system at 0~5℃ In an ice-water bath, dropwise add 1 mol / L ammonium persulfate aqueous solution with 0.9 times the molar amount of aniline, and stir for 6 hours. After the reaction is completed, wash with absolute ethanol and distilled water, then filter with suction, and dry in vacuum to obtain modified graphene pink.

[0032] (2) Preparation of paint

[0033] 1) Take 10g of epoxy resin E44, 2.0g of modified graphene powder, 0.2g of fumed silica, 15mL of mixed solvent, 0.02g of defoamer, 0.04g of leveling agent,...

Embodiment 3

[0037] (1) Preparation of modified graphene

[0038] Take 10g of graphene oxide, add 150mL of concentrated ammonia water, stir and react at 30°C for 24h, then react at 70°C for 10h, filter, wash, and vacuum dry to obtain aminated graphene. To the aminated graphene, add 10g of aniline and 30mL of isopropanol and water mixed solution, after ultrasonic vibration for 30min, add 12mL of 2.5mol / L hydrochloric acid solution; control the system temperature at 0~5℃ In an ice-water bath, dropwise add 1 mol / L ammonium persulfate aqueous solution with 1 times the molar amount of aniline, and stir for 6 hours. After the reaction, wash with absolute ethanol and distilled water, then filter with suction, and vacuum dry to obtain modified graphite ene powder.

[0039] (2) Preparation of paint

[0040] 1) Take 10g of epoxy resin E44, 2.5g of modified graphene powder, 0.3g of anti-settling agent, 30mL of mixed solvent, 0.02g of defoamer, 0.02g of leveling agent, and 0.08g of dispersant, and s...

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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 ...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D187/00C09D5/24C09D5/08C09D7/12C08G83/00
Inventor 刘志雷刘文杰胡孝涛周建萍李多生刘光明
Owner NANCHANG HANGKONG UNIVERSITY
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