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A kind of graphene heat conduction film and preparation method thereof

A graphene film and graphene technology, applied in the direction of graphene, nano-carbon, etc., can solve the problems of low thermal conductivity and complicated preparation process of graphene heat-conducting film, achieve short reaction time, simple preparation process, and small environmental pollution Effect

Active Publication Date: 2016-03-16
CHANGZHOU FUXI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems of complex preparation process and low thermal conductivity of the prepared graphene heat conduction film in the prior art, the present invention provides a preparation method of graphene heat conduction film, the method is simple to operate and the conditions are easy to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A method for preparing a graphene thermally conductive film includes the following steps:

[0055] (1) Weigh 500 mg of graphite oxide prepared by Hummers method, add 20 mL of water to ultrasonically disperse, and make it fully peeled off to obtain an aqueous solution of graphene oxide;

[0056] (2) Coat the graphene oxide aqueous solution (the width of the coated substrate is 200mm) to obtain a graphene oxide film with a width of 200mm and a thickness of 25μm. The graphene oxide film is placed in an oven and dried at 50°C for 24h;

[0057] (3) Put the dried graphene oxide film into a high-temperature graphitization furnace, and pass argon as a protective gas with a flow rate of 110cm 3 / min, calcining at a high temperature of 2500°C for 10 minutes for high temperature reduction reaction;

[0058] (4) After the reduction reaction is completed, the temperature is naturally cooled to room temperature to obtain a graphene thermal conductive film.

[0059] The thermal conductivity of ...

Embodiment 2

[0062] A method for preparing a graphene thermally conductive film includes the following steps:

[0063] (1) Weigh 500 mg of graphite oxide prepared by Hummers method, add 20 mL of water to ultrasonically disperse, and make it fully peeled off to obtain an aqueous solution of graphene oxide;

[0064] (2) Coating the graphene oxide aqueous solution to obtain a graphene oxide film with a width of 200 mm and a thickness of 17 μm. The graphene oxide film is placed in an oven and dried at 50°C for 24 hours;

[0065] (3) Put the dried graphene oxide film into a high-temperature graphitization furnace, and pass argon as a protective gas with a flow rate of 100cm 3 / min, calcining at a high temperature of 2900℃ for 30min for high temperature reduction reaction;

[0066] (4) After the reduction reaction is completed, the temperature is naturally cooled to room temperature to obtain a graphene thermal conductive film.

[0067] The thermal conductivity of the prepared graphene thermal conductive ...

Embodiment 3

[0070] A method for preparing a graphene thermally conductive film includes the following steps:

[0071] (1) Weigh 500 mg of graphite oxide prepared by Hummers method, add 20 mL of water to ultrasonically disperse, and make it fully peeled off to obtain an aqueous solution of graphene oxide;

[0072] (2) Coating the graphene oxide aqueous solution to obtain a graphene oxide film with a width of 200 mm and a thickness of 70 μm. The graphene oxide film is placed in an oven and dried at 50°C for 24 hours;

[0073] (3) Put the dried graphene oxide film into a high-temperature graphitization furnace, and pass argon as a protective gas with a flow rate of 80cm 3 / min, calcined at a high temperature of 2300℃ for 15min for high temperature reduction reaction;

[0074] (4) After the reduction reaction is completed, the temperature is naturally cooled to room temperature to obtain a graphene thermal conductive film.

[0075] The thermal conductivity of the prepared graphene thermal conductive fi...

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Abstract

The invention relates to a preparation method of a graphene heat conducting membrane. The method comprises the following steps: filtrating or coating graphene oxide dispersed in a solvent to obtain a graphene oxide membrane; then, reducing the graphene oxide membrane at a high temperature to obtain the graphene heat conducting membrane. The preparation method of the graphene heat conducting membrane, provided by the invention, is simple in technique, simple in operation and easy in control on conditions, and the graphene heat conducting membrane provided by the invention is controllable in shape, size and thickness and relatively high in heat conductivity.

Description

Technical field [0001] The invention relates to the field of preparation and application of graphene materials, more specifically, to a graphene thermally conductive film and a preparation method thereof, and specifically to a graphene oxide film reduction process through a high-temperature thermal reduction process to graphene with high thermal conductivity Thin film process method. Background technique [0002] Thermally conductive graphite film is also known as thermally conductive graphite sheet, heat dissipation graphite film, graphite heat dissipation film and so on. Thermally conductive graphite film is a new type of heat-conducting and heat-dissipating material, and its heat-conducting and heat-dissipating effect is very obvious. It has been widely used in PDP, LCDTV, NotebookPC, UMPC, FlatPanelDisplay, MPU, Projector, PowerSupply, LED and other electronic products. However, the horizontal thermal conductivity of the thermally conductive graphite film is only about 1000W...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 李璐徐怀良刘琼馨瞿研
Owner CHANGZHOU FUXI TECH CO LTD
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