Method for preparing high thermal radiation graphene paint

A graphene and coating technology, applied in the field of graphene, can solve the problems of limited thermal radiation performance of graphene finished products, difficult to meet high thermal conductivity requirements, and large pollution in the purification process, so as to save the purification process, improve the purity, and achieve high purity. Effect

Inactive Publication Date: 2019-01-11
GUANGDONG SUQUN NEW MATERIAL CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

However, in the production process of this natural flake graphite powder, the pollution is relatively large, the purity is not high, the pollution generated by the purification process is relatively large, and it is difficult to process high-quality powder raw materials (graphene accounts for 99%), resulting in the preparation of The thermal radiation performance of the finished graphene product is limited, and it is difficult to meet the high thermal conductivity requirements

Method used

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Embodiment Construction

[0017] In order to further understand the features, technical means and specific objectives and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with specific embodiments.

[0018] The invention discloses a method for preparing a graphene coating with high thermal radiation, comprising the following steps:

[0019] Select artificial synthetic graphite as raw material, grind and crush the synthetic graphite to make graphite powder, and the synthetic graphite is obtained by firing PI film. The artificially prepared synthetic graphite is sent to the grinding equipment according to the required amount for crushing and grinding, and according to the set powder particle size, the powder material diameter is limited within 20mn. The graphite powder obtained by grinding can be filtered and screened through a filter sieve of corresponding specifications, so as to obtain graphite powder meeting the specified part...

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Abstract

The invention discloses a method for preparing high thermal radiation graphene paint. The method comprises the following steps: selecting synthesized graphite as a raw material, grinding and crushingthe synthesized graphite into graphite powder; doping sulfuric acid into the sulfuric acid as intercalator, and sufficiently and uniformly stirring; doping oxidant, oxidizing the sulfuric acid doped graphite powder to obtain graphene oxide; washing the graphene oxide to prepare the graphene oxide paint having a solid content of more than or equal to 3 percent. The graphene having higher quality and higher purity is prepared by adopting synthesized graphite to facilitate processing, and the graphene paint with better thermal radiation performance can be widely applied to electric conductive andthermal conductive paint.

Description

technical field [0001] The invention belongs to the technical field of graphene, in particular to a method for preparing a graphene coating with high thermal radiation. Background technique [0002] At present, the materials commonly used in mainstream heat dissipation coatings are mainly aluminum nitride, silicon carbide, hexagonal boron nitride, alumina, graphite, graphene and modified graphene. Some coatings focus on their own heat conduction effect, but ignore the low efficiency of natural convection heat transfer and high heat radiation in the coating application environment; some coatings focus on the heat radiation of the coating and ignore the heat exchange between the substrate and the coating , facing local hot spots formed by heat accumulation, high application temperature; even paying attention to the performance of coatings and ignoring the environmental pollution caused by them. Graphene, as a heat dissipation material with better performance, has been more an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/24C09K5/14
CPCC09D1/00C09D5/24C09K5/14
Inventor 任泽明余长勇唐志奇
Owner GUANGDONG SUQUN NEW MATERIAL CO LTD
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