Anticorrosive polyaniline/silicon carbide/graphene composite coating and preparation method thereof

A graphene composite, anti-corrosion coating technology, applied in anti-corrosion coatings, conductive coatings, epoxy resin coatings and other directions, can solve the problems of metal substrate surface coating damage, general anti-corrosion coating effect, stacking performance and other problems, to achieve excellent anti-corrosion performance, Easy to scale industrial production, simple operation effect

Inactive Publication Date: 2016-04-13
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above patents, graphene has not been further processed, and it is prone to agglomeration and heavy stacking during the dispersion process, which affects its performance.
On the other hand, in the daily use of these coatings, various friction and wear will inevitably occur, resulting in damage and peeling off of the coating on the surface of the metal substrate.
Therefore, the existing anti-corrosion coatings are generally effective, and it is very necessary to develop a new type of anti-corrosion coating

Method used

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  • Anticorrosive polyaniline/silicon carbide/graphene composite coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] It is composed of the following components in terms of mass ratio percentage, epoxy resin E51 is 50, polyaniline / silicon carbide / graphene composite material is 5, polyamide curing agent is 15, plasticizer dibutyl phthalate is 2 , the defoamer fluorosilicone Airex931 is 1, and the solvent N-methylpyrrolidone is 27.

[0030] 1) Add 0.5g of silicon carbide into sodium dodecylbenzenesulfonate aqueous solution, ultrasonically disperse for 10 minutes, add aniline, stir and mix evenly at 0°C, the concentration of sodium dodecylbenzenesulfonate is 20mg / mL, and the concentration of aniline 0.15mol / L;

[0031] 2) Prepare an aqueous solution containing ferric chloride with pH=1, cool to 0° C., and the molar ratio of ferric chloride to aniline is 1.5:1;

[0032] 3) Mix the solution of step 1) and step 2), stir and react at 0°C for 8 hours, filter, wash, and dry to obtain a polyaniline / silicon carbide composite material;

[0033] 4) Disperse the polyaniline / silicon carbide composi...

Embodiment 2

[0037] It is composed of the following components in terms of mass ratio, epoxy resin E44 is 45, polyaniline / silicon carbide / graphene composite material is 8, polyamide curing agent is 18, plasticizer dibutyl phthalate is 5, The antifoaming agent fluorosilicone Airex932 is 1, and the solvent n-butanol is 23.

[0038] 1) Add 0.6g of silicon carbide into the sodium dodecylbenzenesulfonate aqueous solution, ultrasonically disperse for 15 minutes, add aniline, stir and mix evenly at 2°C, the concentration of sodium dodecylbenzenesulfonate is 30mg / mL, and the concentration of aniline is 0.3mol / L;

[0039] 2) Prepare an aqueous solution containing ferric nitrate with pH=2, cool to 2°C, and the molar ratio of ferric nitrate to aniline is 1:1;

[0040] 3) Mix the solution of step 1) and step 2), stir and react at 2°C for 12 hours, filter, wash, and dry to obtain a polyaniline / silicon carbide composite material;

[0041] 4) Disperse the polyaniline / silicon carbide composite material ...

Embodiment 3

[0045] It is composed of the following components in terms of mass ratio, epoxy resin E42 is 60, polyaniline / silicon carbide / graphene composite material is 8, polyetheramine curing agent is 10, plasticizer dioctyl phthalate is 4 , the defoamer organomodified polysiloxane Airex962 is 1, and the solvent xylene is 17.

[0046] 1) Add 0.8g of silicon carbide into sodium dodecylbenzenesulfonate aqueous solution, ultrasonically disperse for 30 minutes, add aniline, stir and mix evenly at 4°C, the concentration of sodium dodecylbenzenesulfonate is 40mg / mL, and the concentration of aniline 0.4mol / L;

[0047] 2) Prepare an aqueous solution containing an oxidizing agent with pH=4, and cool it to 4°C. The oxidizing agent is ferric chloride, ferric nitrate, or ammonium persulfate, and the molar ratio of the oxidizing agent to aniline is 2:1;

[0048] 3) Mix the solution of step 1) and step 2), stir and react at 4°C for 12 hours, filter, wash, and dry to obtain a polyaniline / silicon carbi...

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Abstract

The invention discloses an anticorrosive polyaniline/silicon carbide/graphene composite coating and a preparation method thereof. Polyaniline and silicon carbide nanoparticles are composited through on-site polymerization firstly, then a polyaniline/silicon carbide material is coated with graphene oxide through electrostatic self-assembly, and a polyaniline/silicon carbide/graphene composite material is obtained through hydrazine hydrate reduction. Then the polyaniline/silicon carbide/graphene composite material is added to a solvent containing epoxy resin, a curing agent, a plasticizer and an antifoaming agent are added, and the anticorrosive polyaniline/silicon carbide/graphene composite coating is obtained finally. The adopted polyaniline and graphene have good electrical conductivity and can have an anticorrosive effect; silicon carbide is high in hardness and thermal stability and used for enhancing the coating performance. The prepared coating has excellent anticorrosive performance, the production process is mature and simple to operate, no complex equipment is required, and large-scale industrial production is facilitated.

Description

technical field [0001] The invention relates to an anti-corrosion coating, in particular to a polyaniline / silicon carbide / graphene composite anti-corrosion coating and a preparation method thereof, belonging to the field of new composite materials and functional coatings. Background technique [0002] Metal corrosion is a phenomenon in which metal materials undergo chemical or electrochemical reactions under the action of the surrounding environment, resulting in the destruction of the properties of metal materials. Therefore, in order to reduce or even prevent metal corrosion, people use cathodic protection and coating methods to protect metals. At present, one of the most common, convenient and effective methods is to apply a layer of anti-corrosion paint on the metal surface to isolate the external environment from contacting the metal surface, so as to achieve the purpose of metal anti-corrosion. At present, the demand for anti-corrosion coatings is increasing in the fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D5/24C09D7/12
CPCC09D163/00C08K2201/014C08L2205/025C09D5/08C09D5/24C09D7/62C09D7/63C09D7/65C08L79/02C08K9/10C08K3/34C08K5/12
Inventor 李亮刘玉兰刘仿军张桥
Owner WUHAN INSTITUTE OF TECHNOLOGY
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