Method for preparing graphene-polyimide conductive black film

A polyimide and graphene technology, which is applied in the field of graphene-polyimide conductive black film preparation, can solve the problems of less research on polyimide black film, affecting the conductivity and high light transmittance of composite films, etc. , to achieve the effect of low cost, smooth surface and uniform color

Active Publication Date: 2014-11-19
欧码魔力科技有限公司
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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

Method used

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  • Method for preparing graphene-polyimide conductive black film
  • Method for preparing graphene-polyimide conductive black film

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Embodiment Construction

[0015] Preferably, the preparation method of the present invention comprises the following steps:

[0016] 1. Expandable graphite for secondary expansion

[0017] Weigh an appropriate amount of flake graphite, use potassium permanganate as an oxidant, concentrated sulfuric acid as an intercalation agent, bathe in a water bath at 20°C-60°C, stir intermittently for 30-120min, wash with dilute hydrochloric acid (10%-20%) and deionized water to medium properties, filtered and dried to obtain expandable graphite. Take the dried expandable graphite and place it in a microwave oven for expansion, with a power of 10KW, a temperature of 500°C-1000°C, and an expansion time of 10-30s to obtain expanded graphite. The expanded graphite is secondarily expanded by the above-mentioned method;

[0018] 2. Preparation of graphene and black filler dispersion

[0019] Add 30-90ml of N,N-dimethylformamide or N,N-dimethylacetamide into a 250mL three-necked flask, and add an appropriate amount of...

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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...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L79/08C08G73/10C08K3/04
Inventor 李垚寇玉洁张盼盼王月敏赵九蓬
Owner 欧码魔力科技有限公司
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