Graphene film and preparation method therefor

A graphene film and graphene technology, applied in the preparation of the preparation method, in the field of graphene film, can solve serious problems, electromagnetic wave pollution, heat generation, etc., and achieve good effect, easy operation, and stable product quality

Active Publication Date: 2015-12-02
CHANGZHOU FUXI TECH CO LTD
5 Cites 53 Cited by

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Problems solved by technology

The upgrading of electronic equipment brings great convenience and excellent experience to people's life,...
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Abstract

The invention provides a preparation method for a graphene film. The method comprises the following steps of carrying out ultrasonic soaking and stirring on graphene oxide, carrying out impurity filtration, coating a PET (Polyethyleneglycol Terephthalate) film with a graphene oxide solution, and carrying out carbonization and graphitization, thereby obtaining the graphene film. The method is simple in process and easy to popularize, and the obtained graphene film has extremely high shielding effectiveness and good heat dissipating performance.

Technology Topic

Thin membranePolymer chemistry +2

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  • Graphene film and preparation method therefor

Examples

  • Experimental program(1)
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Example Embodiment

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0023] Embodiment According to the method disclosed in the present invention, the following operations are performed:
[0024] a) Mix graphene oxide and water in a ratio of 1:20. The above ratio can be adjusted in the range of 1:(10-100), which is determined according to actual operation requirements. Use a high-speed disperser with ultrasonic rods to Stir and mix at 500~3000rps for 2~8 hours;
[0025] b) Use a vibrating screen to filter out impurities in the graphene oxide;
[0026] c) Use a doctor blade coating method to coat the graphene oxide slurry on the PET film, then dry it in the oven of the coater, and then peel and rewind to obtain a graphene oxide film with a thickness of 10um~200um;
[0027] d) Under the protection of nitrogen, the temperature is increased from room temperature to 800°C at a heating rate of 10°C/min for carbonization;
[0028] e) Under the protection of argon, increase the temperature from room temperature to 2300°C at a heating rate of 20°C/min for graphitization and obtain a graphene thermal conductive film. The protective gases mentioned above, namely nitrogen and argon, can also be based on cost or other requirements Use other protective gases.
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PUM

PropertyMeasurementUnit
Thickness10.0 ~ 200.0µm
Shielding effectiveness67.6db
Shielding effectiveness93.7db
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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