Graphene composite electrothermal film and preparation method thereof

Abstract

The invention relates to a graphene composite electrothermal film, which comprises a first insulating layer from bottom to top; a reflective layer located on the upper surface of the first insulating layer; The heat dissipation element; the heat dissipation element is the first graphene rack evenly laid on the surface of the heating element; the covering layer covering the conductive heating layer includes the upper thermal insulating layer and the second graphene rack arranged on the bottom surface of the thermal insulating layer ; At least a part of the protruding part of the covering layer is not covered on the conductive heating layer, so that the upper surface of at least a part of the exposed part of the conductive heating layer is not covered; the second insulating layer is located on the upper surface of the covering layer; the first insulating layer A lower pre-pasted film is provided on one side of the lower surface, and an upper pre-pasted film is provided on one side of the upper surface of the second insulating layer. The electrothermal film is a splicable film unit with wide applicability and excellent heat dissipation performance.

Description

technical field [0001] The invention relates to a heating film structure, more specifically, to a graphene composite electric heating film and a preparation method thereof. Background technique [0002] Heating film is an electronic component that directly converts electrical energy into heat energy. It is mainly used in heating, heat preservation, drying, industrial and pipeline heating, and constant temperature equipment. Graphene has very good thermal conductivity, and its thermal conductivity is as high as 5300W / mK. It is the carbon material with the highest thermal conductivity so far. At present, there are heating films made of graphene. To adjust the size of application scenarios of different sizes, when using a large area, it is often necessary to set up electrode connections at both ends of the film. This operation is cumbersome and the splicing effect is poor; The heat dissipation layers are bonded through the adhesive layer, resulting in poor heat dissipation eff...

AI Technical Summary

Problems solved by technology

Graphene has very good thermal conductivity, and its thermal conductivity is as high as 5300W / mK. It is the carbon material with the highest thermal conductivity so far. At present, there are heating films made of graphene. To adjust the size of application scenarios of different sizes, when using a large area, it is often necessary to set up electrode connections at both ends of the film. This operation is cumbersome and the splicing effect is poor; The heat dissipation layers are bonded through the adhesive layer, resulting in poor heat dissipation effect and affecting the heat dissipation efficiency of the electrothermal film

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