Expanded polytetrafluoroethylene film coating composite material with functions like heat conduction, heat insulation, electric conduction and electromagnetic shielding and preparation method thereof

Abstract

The invention discloses an expanded polytetrafluoroethylene film coating composite material with functions like heat conduction, heat insulation, electric conduction and electromagnetic shielding and a preparation method thereof. The composite material comprises at least one expanded polytetrafluoroethylene film layer, a graphene electric-conductive and heat-transfer coating and a silica aerogel coating, wherein the surface of one side of the at least one expanded polytetrafluoroethylene film layer is compounded with the graphene electric-conductive and heat-transfer coating; and the surface of the other side of the at least one expanded polytetrafluoroethylene film layer is compounded with the silica aerogel coating. Thus, the problems of attachment compactness and fastness of the graphene electric-conductive and heat-transfer coating and the heat-insulating silica aerogel coating can be solved; the expanded polytetrafluoroethylene film coating composite material with functions like heat conduction, heat insulation, electric conduction and electromagnetic shielding has the advantages of good softness and bonding properties, strong coating tensile resistance, no cracking, small material thickness and environmental aging resistance; meanwhile, the coating-free surface of the expanded polytetrafluoroethylene has the functions of insulation and isolation.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to an expanded polytetrafluoroethylene film-coated composite material with functions of heat conduction, heat insulation, conduction, electromagnetic shielding and the like and a preparation method thereof. Background technique [0002] Current electronic information products such as precision electronic devices, consumer electronics (mobile phones, cameras, computers, and color TVs), and new energy vehicles are often used in order to solve the heat dissipation of the system, using high-quality aluminum or copper parts for heat conduction and heat dissipation. Or install a fan inside the product to force ventilation and heat dissipation; in order to solve the problem of electromagnetic interference inside and outside the electronic components, a metal shell or a wire mesh shielding structure is often used, so that the current electronic information products are larger in size, heav...

AI Technical Summary

Problems solved by technology

[0002] Current electronic information products such as precision electronic devices, consumer electronics (mobile phones, cameras, computers, and color TVs), and new energy vehicles are often used in order to solve the heat dissipation of the system, using high-quality aluminum or copper parts for heat conduction and heat dissipation. Or install a fan inside the product to force ventilation and heat dissipation; in order to solve the problem of electromagnetic interference inside and outside the electronic components, a metal shell or a wire mesh shielding structure is often used, so that the current electronic information products are larger in size, heavier in weight, and higher in cost. , resulting in a shortage of copper and aluminum resources

The above-mentioned electronic information products and heating components of new energy vehicles are usually separated by thicker felt mats such as glass fiber, asbestos, rock wool, silicate, etc., but the effect is not good, which makes the above-mentioned products bulky. Difficult to meet thin and small requirements

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