Production process of high-heat-conductivity flexible graphene film gasket

Abstract

The invention discloses a production process of a high-heat-conductivity flexible graphene film gasket. The heat conduction gasket comprises a few-layer porous graphene film and a film-based heat conduction net, wherein the film-based heat conduction net is vertically arranged on the few-layer porous graphene film substrate. The process is characterized by comprising the following process steps: performing mesh sieve screening on graphene; rolling the mesh-screened graphene by using a rolling machine so as to obtain a graphene film; preparing spraying slurry, and spraying the spraying slurry to the few-layer porous graphene film by using a spraying machine; performing rolling molding and drying on the few-layer porous graphene film coated by the spraying slurry so as to form a film heat conduction net which is formed in a longitudinal and transverse interwoven manner and is perpendicular to the few-layer porous graphene film, and performing combination, so as to obtain the high-heat-conductivity flexible graphene film gasket. With the combination of the slurry heat conduction nets with excellent heat conduction performance, heat conduction channels of the film can be effectively increased, the heat conduction performance of the film in an X direction and a Z direction can be improved, the interlayer strength of the few-layer porous graphene films in overlapping can be improved,and the composite material heat conduction gasket has excellent heat conduction performance.

Description

technical field [0001] The invention relates to the technical field of thermally conductive materials, in particular to a production process for highly thermally conductive flexible graphene film gaskets. Background technique [0002] Graphene has high strength, ultra-thin, excellent thermal conductivity, but it also has limitations. Compared with other materials that use graphene or graphite to conduct heat, the developed flexible graphene film gasket with high thermal conductivity forms a channel with good heat conduction and has good processing and impact resistance, which effectively solves the shortcomings of insufficient impact performance of graphene heat conduction materials. [0003] 5G technology has long been promoted as a national strategy by many countries. It is predicted that the annual sales of 5G mobile phones alone will exceed 100 million units in 2021, and the number of base stations will increase to 8 million. They will bring huge market growth. Thinness...

AI Technical Summary

Problems solved by technology

[0005] Traditional low-end products such as heat-conducting oil, heat-conducting silicone grease, and heat-conducting silicone rubber cloth are all based on silica gel or other polymer materials. By filling heat-conducting powder, the composite material has a heat-conducting channel, thereby achieving heat conduction of the material. Function, the more powder filled, the more reasonable the powder particle size matching, the more heat conduction channels, the higher the corresponding material thermal conductivity, but as the filling material increases, the mechanical properties of the product, especially the tensile strength The compressibility and compressibility are greatly reduced, which limits the application in many occasions. At the same time, the more powder is filled, the density of the material will also increase. Obviously, it is not in line with the current trend of pursuing light weight and user physical examination. Therefore, we A high thermal conductivity flexible graphene film gasket production process is proposed to solve the above problems

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