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Efficient graphene-based cooling coating as well as preparation method and application thereof

A graphene-based, heat-dissipating coating technology, applied in anti-corrosion coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve the problems of inability to exhibit the excellent characteristics of graphene, poor dispersibility, and increased difficulty in post-processing, etc. Achieve the effect of promoting the development of miniaturization, stable performance and excellent corrosion resistance

Inactive Publication Date: 2015-04-29
苏州格瑞丰纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the easy stacking characteristics of graphene lead to poor dispersion and increased difficulty in post-processing, thus failing to show the intrinsic excellent characteristics of graphene.

Method used

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  • Efficient graphene-based cooling coating as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Take 5 parts of graphene powder with an average radial size of about 20 μm and an average thickness of about 5 nm (all parts by weight unless otherwise specified below), and 10 parts of carbon black with an average particle diameter of about 30 nm in diacetone alcohol Ultrasonic for 1 h, and dried at 90°C to obtain graphene carbon black composite powder. Then mix with 5 parts of 325 mesh graphite and 10 parts of nano-silica in a high-speed disperser, and then mix with 60 parts of epoxy resin, 10 parts of ethyl acetate, 20 parts of N, N-dimethylformamide, Stir and disperse in a planetary mixer (3000rpm, 1h), and then grind on a three-roller machine for 3 hours, 2000rpm, to obtain the final heat-dissipating coating. See the heat-dissipating effect figure 1 .

[0032] When this heat dissipation paint is coated on the CPU radiator, it can be seen that the CPU operating temperature coated with graphene heat dissipation paint (refer to figure 1 The lower curve in ...

Embodiment 2

[0033] Example 2 Take 10 parts of graphene powder with an average radial size of about 50 μm and an average thickness of about 10 nm, and 5 parts of carbon black with an average particle size of about 30 nm, ultrasonically in N,N-dimethylformamide for 1 hour, and dry to obtain Graphene carbon black composite powder. Then mix evenly with 5 parts of 325 mesh graphite and 10 parts of activated carbon in a high-speed disperser, then mix with 60 parts of polyurethane, 10 parts of acetone, 20 parts of N, N-dimethylformamide, vacuum planetary stirring (3000rpm, 1h), Then grind for 3 hours with a three-roll machine at 2000 rpm to obtain the final heat-dissipating coating.

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Abstract

The invention discloses an efficient graphene-based cooling coating as well as a preparation method and application thereof. The coating mainly consists of graphene composite powder, a filler, a high-molecular binder and a solvent, wherein the graphene composite powder mainly consists of thin-layer graphene and carbon black; the carbon black is mainly dispersed among the thin-layer graphene. Further, the graphene composite powder is formed by ultrasonically dispersing and mixing the thin-layer graphene powder and the carbon blank and then drying. When the coating is coated on the surfaces of devices, the surface cooling efficiency of the devices can be remarkably improved and the cooling ability of the cooling devices is greatly enhanced; the coating is antiseptic, waterproof, antifouling, stable in cooling property and free of being influenced by surrounding medium, and has wide application prospect and practical value in the electronic cooling field; meanwhile, the coating preparation process is simple, low in cost and suitable for large-scale production.

Description

technical field [0001] The invention relates to the preparation and application of a high-efficiency graphene-based heat dissipation coating, which belongs to the fields of new materials and microelectronics. Background technique [0002] With the increasing density and power intensity of electronic devices, a large amount of heat generated by electronic devices needs to be dissipated to the external environment in time. However, the heat dissipation performance of the current devices can no longer meet the requirements, which limits the use effect and service life of some electrical devices. Heat dissipation coating is a special coating that improves the heat dissipation efficiency of the surface of the object and reduces the temperature of the system. It can reduce the temperature of the heating device in time, prolong the service life and stability of the device, and is of great significance to stabilizing the performance of the device and realizing the miniaturization of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12C09D163/00C09D5/08
CPCC08K3/04C08K3/36C08K2201/011C08K2201/014C09D5/08C09D7/67C09D163/00C09D175/04
Inventor 刘立伟邱胜强李伟伟李奇陈明亮郭玉芬刘朝军
Owner 苏州格瑞丰纳米科技有限公司
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