Flexible composite graphite-based material with high heat conduction property and preparation method thereof

Abstract

The invention relates to the technical field of materials, and in particular relates to a graphite-based material. A flexible composite graphite-based material with high heat conduction property comprises a folding graphite flake and a macromolecular flexible body, wherein the folding graphite flake is coated in the macromolecular flexible body; and components of the macromolecular flexible body comprise flexible resin and high heat conduction powder, and the folding graphite flake is formed by connecting two ends of at least three graphite flakes and is in a W-shaped folding form. The flexible composite graphite-based material provided by the invention has the advantages that the horizontal direction of the graphite flake is changed into the vertical direction of the material in a foldingmanner, so that the material has good vertical heat conduction capability; the macromolecular flexible body is used as an outer layer of the material, so that the material overall has flexibility andcan better fit the surface of a heating part, and thermal resistance is reduced; and the graphite flake is encapsulated into the flexible resin in the folding manner, so that external dimension of the material can be flexibly adjusted according to the actual demand.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to graphite-based materials. Background technique [0002] Graphite sheet is a good heat conduction and heat dissipation material. Due to the special crystal structure of graphite, the thermal conductivity in the horizontal direction can reach 1500W / (m·K), but the thermal conductivity in the vertical direction is only 10~40W / (m·K) , resulting in graphite-based thermally conductive materials being mostly in the form of thin films or thin sheets, the scope of application is limited, and it cannot meet the heat dissipation requirements of some high-heat-generating components. Contents of the invention [0003] The object of the present invention is to provide a flexible composite graphite-based material with high thermal conductivity to solve at least one of the above technical problems. [0004] The purpose of the present invention is also to provide a method for preparing a flex...

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Problems solved by technology

[0002] Graphite sheet is a good heat conduction and heat dissipation material. Due to the special crystal structure of graphite, the thermal conductivity in the horizontal direction can reach 1500W / (m·K), but the thermal conductivity in the vertical direction is only 10~40W / (m·K) , resulting in graphite-based thermally conductive materials mostly in the form of thin films or thin sheets, the scope of application is limited, and it cannot meet the heat dissipation requirements of some high-heating components

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