Graphene composite conductive coating as well as preparation method and application thereof

A graphene composite and conductive coating technology, which is applied in conductive coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of high cost, difficulty in uniform dispersion, and large intermolecular force, and achieve stable and low electrical conductivity. Cost, effect of uniform dispersion

Inactive Publication Date: 2018-06-08
EVERPOWER SHENG TIE (XIAMEN) GRAPHENE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing graphene and its composite materials and technologies have begun to carry out scientific research experiments in many fields, and some progress has been made in the experimental data, they have not yet achieved a good conductive effect, and the process is complicated and the cost is high.
The high specific surface area of ​​graphene ultrafine material leads to too much force between molecules, which makes it easy to agglomerate and is not easy to disperse evenly, which affects the excellent performance of graphe

Method used

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  • Graphene composite conductive coating as well as preparation method and application thereof
  • Graphene composite conductive coating as well as preparation method and application thereof

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preparation example Construction

[0036] Such as figure 1As shown, the preparation method of the graphene composite conductive coating provided by the embodiments of the present invention comprises the following steps:

[0037] S101: Add graphene to the slow-drying solvent, add 2% PVP dispersant, use a magnetic stirrer to disperse initially at 60°C-80°C for 10min-30min, then use ultrasonic equipment for 60min-120min, observe graphene with SEM Morphology, using AFM to observe the thickness of graphene at 1nm-10nm, to obtain solution A;

[0038] S102: Add the ultra-fine copper powder into the slow-drying solvent, add 2% PVP dispersant, and use a magnetic stirrer to stir and disperse at 60°C-80°C for 10min-30min, and then use ultrasonic equipment for 60min-120min to obtain solution B ;

[0039] S103: Add the ultra-fine silver powder into the slow-drying solvent, add 2% PVP dispersant, and use a magnetic stirrer to initially stir and disperse at 60°C-80°C for 10min-30min, and then use ultrasonic equipment for 60...

Embodiment 1

[0043] The graphene composite conductive coating provided by the embodiment of the present invention is mainly prepared from the following raw materials: 5-80% resin, 1% graphene, 5% ultra-fine copper powder, 7.2% ultra-fine silver powder, and 0.55%-0.8% dispersant , Fast-drying organic solvent: slow-drying organic solvent (3:2, adjust the ratio according to needs), anti-settling agent 0.3-1%, leveling agent 0.3-1%, cross-linking agent 0.1-1%, etc.

[0044] The preparation method of the graphene composite conductive coating that the embodiment of the present invention provides comprises the following steps:

[0045] (1) Add graphene to the slow-drying solvent, add PVP dispersant, and use a magnetic stirrer to stir and disperse at 60-80°C for 10 minutes, then use ultrasonic equipment for 60-120 minutes, and observe the graphene morphology with SEM. The thickness of graphene was observed at 1-2nm by AFM, and solution A was obtained.

[0046] (2) Add the ultra-fine copper powder...

Embodiment 2

[0050] The graphene composite conductive coating provided by the embodiment of the present invention is mainly prepared from the following raw materials: 5-80% resin, 1.5% graphene, 5 ultra-fine copper powder, 7.2% ultra-fine silver, and 0.55%-0.8% dispersant , Fast-drying organic solvent: slow-drying organic solvent (3:2, adjust the ratio according to needs), anti-settling agent 0.3-1%, leveling agent 0.3-1%, cross-linking agent 0.1-1%, etc.

[0051] The preparation method of the graphene composite conductive coating that the embodiment of the present invention provides comprises the following steps:

[0052] (1) Add graphene to the slow-drying solvent, add PVP dispersant, and use a magnetic stirrer to stir and disperse at 60-80°C for 10 minutes, then use ultrasonic equipment for 60-120 minutes, and observe the graphene morphology with SEM. The thickness of graphene was observed by AFM at 1-2m, and solution A was obtained.

[0053] (2) Add the ultra-fine copper powder into t...

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Abstract

The invention belongs to the technical field of conductive coatings, and discloses a graphene composite conductive coating as well as a preparation method and application thereof. The coating is composed of the following materials: 5-80% of resin, 0.1-5% of graphene, 2.5-20% of copper powder, 7.2-30% of silver powder, 0.55%-3.0% of a dispersant, 17-40% of an organic solvent, 0.3-1% of an anti-settling agent, 0.3-1% of a levelling agent and 0.1-1% of a cross-linking agent; and the preparation method comprises the following steps: adding the graphene into a slowly-drying solvent, adding the dispersant, performing stirring, and performing ultrasonication; adding the ultra-fine copper powder into a slowly-drying solvent, adding the dispersant, performing stirring, and performing ultrasonication; adding the ultra-fine silver powder into a slowly-drying solvent, adding the dispersant, performing stirring, and performing ultrasonication; and adding the dispersant into acrylate polyurethane, adding the treated solutions into the acrylate polyurethane in sequence, adding the organic solvent, the anti-settling agent, the levelling agent and the cross-linking agent, performing stirring, and performing grinding. The coating provided by the invention meets the requirements of conductive performance, avoids the single use of silver, reduces costs, and has a high price/performance ratio.

Description

technical field [0001] The invention belongs to the technical field of conductive coatings, in particular to a graphene composite conductive coating and its preparation method and application. Background technique [0002] Conductive coatings are special functional coatings. It can be used in various military and civilian industrial fields such as electronics, electrical appliances, aviation, chemical industry, and printing. By spraying or brushing, the conductive coating makes the completely insulated non-metal or non-conductive surface have the characteristics of absorbing, conducting and attenuating electromagnetic waves like metal, so as to shield electromagnetic interference. The unique stable lattice structure of graphene makes graphene have excellent electrical, thermal and mechanical properties. The theoretical Young's modulus of graphene reaches 1.0TPa. The thermal conductivity of pure defect-free single-layer graphene is as high as 5300W / m·K, which is the carbon...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D5/24C09D7/62C09D7/20
CPCC08K7/00C08K9/00C08K9/08C08K2201/001C08K2201/014C09D5/24C09D175/14
Inventor 张静林诗科
Owner EVERPOWER SHENG TIE (XIAMEN) GRAPHENE TECH CO LTD
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