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Graphene heat dissipation coating material

A technology of heat-dissipating paint and graphene dispersant, applied in the coating and other directions, can solve the problems of unstable slurry state, unsatisfactory heat-dissipation effect, and lack of extreme heat dissipation of nano-functional heat-dissipating paint, achieving uniform dispersion, Improve the heat dissipation effect and the effect of stable slurry state

Inactive Publication Date: 2020-06-02
胡雄焱
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The mainstream heat dissipation coatings in the market are generally additive-type heat dissipation coatings, but the dispersion of graphene is not ideal, and the slurry state is unstable, so that the heat dissipation effect is not very ideal, and the extreme heat dissipation of nano-functional heat dissipation coatings has not been exerted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A graphene heat-dissipating coating, including uniformly mixing the following materials, the graphene powder accounts for 10wt% of the weight of the slurry; the graphene dispersant accounts for 0.08wt% of the weight of the slurry; the leveling agent accounts for the weight of the slurry The percentage is 0.08wt%; the weight percent of the binder in the slurry is 0.8wt%; the defoamer is 0.25wt% in the weight percent of the slurry; the insulating and thermally conductive filler is 50wt% in the weight percent of the slurry, and the aqueous solvent The weight percentage of the slurry is 38.79wt%, and the viscosity of the slurry is 20000-25000mPa·s.

[0018] Wherein, there is also a small amount of polar functional groups on the surface of graphene, the functional groups are hydroxyl, carboxyl or amino groups, the number of graphite layers of graphene is 1-10 layers, and the radial size of the graphene is 10-25 μm; the graphene dispersant is A mixture of calcium sulfate whis...

Embodiment 2

[0020] A graphene heat-dissipating coating, comprising uniformly mixing the following materials, the graphene powder accounts for 40wt% of the weight of the slurry; the graphene dispersant accounts for 0.8wt% of the weight of the slurry; the leveling agent accounts for the weight of the slurry The percentage is 0.8wt%; the weight percent of the binder in the slurry is 0.05wt%; the antifoaming agent is 0.05wt% in the weight percent of the slurry; The weight percentage of the slurry is 38.3wt%, and the viscosity of the slurry is 50000-60000mPa·s.

[0021] Wherein, there is also a small amount of polar functional groups on the surface of graphene, the functional groups are hydroxyl, carboxyl or amino groups, the number of graphite layers of graphene is 1-10 layers, and the radial size of the graphene is 10-25 μm; the graphene dispersant is A mixture of calcium sulfate whiskers and hydrogenated castor oil, the weight ratio of calcium sulfate whiskers and hydrogenated castor oil is...

Embodiment 3

[0023] A graphene heat-dissipating coating, including uniformly mixing the following materials, the graphene powder accounts for 30wt% of the weight of the slurry; the graphene dispersant accounts for 0.5wt% of the weight of the slurry; the leveling agent accounts for the weight of the slurry The percentage is 0.5wt%; the weight percent of the binder in the slurry is 0.1wt%; the defoamer is 0.2wt% in the weight percent of the slurry; the insulating and thermally conductive filler is 30wt% in the weight percent of the slurry, and the aqueous solvent The weight percentage of the slurry is 38.7wt%, and the viscosity of the slurry is 40000-50000mPa·s.

[0024] Wherein, there is also a small amount of polar functional groups on the surface of graphene, the functional groups are hydroxyl, carboxyl or amino groups, the number of graphite layers of graphene is 1-10 layers, and the radial size of the graphene is 10-25 μm; the graphene dispersant is A mixture of calcium sulfate whiskers...

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PUM

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Abstract

The invention discloses a graphene heat dissipation coating material, which is prepared by uniformly mixing the following materials in percentage by weight: 10-40 wt% of graphene powder, 0.08-0.8 wt%of a graphene dispersing agent, 0.08-0.8 wt% of a leveling agent, 0.05-0.8 wt% of a binder, 0.05-0.25 wt% of a defoaming agent, 20-50 wt% of an insulating heat-conducting filler, and 20-40 wt% of a water-based solvent, wherein the viscosity of the slurry is 20000-60000 mPa.s. The slurry is stable in state, graphene is uniformly dispersed, and the heat dissipation effect of the coating material isimproved.

Description

technical field [0001] The invention relates to the technical field of heat dissipation coatings, in particular to a graphene heat dissipation coating. Background technique [0002] The current 3C products, the internal integrated circuits, with the advancement of technology, are becoming more and more dense, miniaturized, and efficient. When the heat generated by the electronic components inside the product is conducted to the surface of the product, the conduction speed becomes slow, and it is easy to concentrate in a local area, which cannot be effectively dispersed, and the heat dissipation is also very slow. In this state, it is easy to damage the service life of electronic components. Therefore, more and better heat dissipation methods are needed to improve the heating problem of 3C products. [0003] Pure graphene is a two-dimensional crystal with a thickness of only one atom, with a thickness of about 0.35nm. Unlike three-dimensional materials, its low-dimensional ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/61C09D7/65
CPCC09D1/00C09D7/61C09D7/65C09D7/70
Inventor 胡雄焱
Owner 胡雄焱