Method for preparing graphene-polyimide conductive black film

Abstract

The invention discloses a method for preparing a graphene-polyimide conductive black film. The method comprises the following steps: performing secondary expansion on expansible graphite, preparing graphene and black packing dispersion, so as to obtain graphene-polyimide black solution and preparing the graphene-polyimide conductive black film. The method is simple, easy to operate and low in cost. The graphene-polyimide conductive black film obtained by the method is flat in surface, high in absorbance, high in heat resistance and excellent in mechanical strength, can be prepared into black cover films, black antistatic films and black flame-resistant films by using the method and is widely applied to the fields of LED, flexible printed circuit boards, military flexible plastic packaging films, electromagnetic wave shielding and heat-resistant materials of aerospace crafts and the like.

Description

technical field [0001] The invention relates to a preparation method of a graphene-polyimide conductive black film. Background technique [0002] Polyimide is widely used in aerospace, electronic appliances, military due to its excellent mechanical properties, chemical corrosion resistance, solvent resistance, high thermal stability, small thermal expansion coefficient and good processability Cutting-edge technology fields such as equipment field, automobile, and communication. However, with the expansion of application fields, the requirements for product performance and product stability in various environments continue to increase. [0003] On the one hand, the world today has entered the information age, and electromagnetic waves of various frequencies and wavelengths fill the entire space of the earth. These electromagnetic waves will cause varying degrees of interference to unshielded sensitive electronic components, circuit boards, computers, communication facilitie...

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Problems solved by technology

Existing document retrieval finds, what report mostly is to prepare graphite oxide by Hummers method, utilize solution blending method to prepare graphene-polyimide film after solvothermal reduction, the film of preparing like this is owing to the incomplete reduction of graphene oxide, Affects the conductivity of the composite film

[0004] On the other hand, with the development of semiconductor technology and the miniaturization and portability of electronic components, the research on polyimide transparent conductive film is becoming more and more mature, and for the application of interactive electronic whiteboard pressure-sensitive film, patch There are few researches on polyimide black film such as electrode film, conductive film of dancing mat, conductive gasket film / conductive electrode of beauty and body medical massager, heating film, opaque conductive polymer film, etc.

CN102786704 discloses a preparation method of polyimide black film, which is simple in operation, uniform in product color, but high in light transmittance

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