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Graphene heat conducting membrane and preparation method thereof

A graphene thermal conductive film and graphene film technology, applied in the field of graphene material preparation and application, can solve the problems of low thermal conductivity of graphene thermal conductive film, complicated preparation process, etc., and achieve short reaction time, simple preparation process, size and thickness controllable effect

Active Publication Date: 2013-12-18
CHANGZHOU FUXI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology uses no dangerous or bad substances for creation of thin films on various materials like carbon nanotubbles (CNT). It allows precise control over how well these layers will behave during processing without causing damage from heat treatment processes used earlier methods. Additionally, it simplifies production procedures while improving efficiency and quality reducing the amount of waste generated when producing them. Overall this results in improved performance characteristics compared to previous techniques.

Problems solved by technology

Technologies aimed towards developing better ways to efficiently transfer heat away from points like CPU chips (central processing units) without losing too much power due to poor performance caused by traditional coolants. This requires improved thermal conductance and stable shapes over time while maintaining ease during production processes. Current techniques involve expensive raw materials and require multiple steps, making manufacturing even harder.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A preparation method for a graphene heat conducting film, comprising the steps of:

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

[0056] (2) Coating the graphene oxide aqueous solution (the width of the coating substrate is 200 mm) to obtain a graphene oxide film with a width of 200 mm and a thickness of 25 μm, put the graphene oxide film in an oven, and dry at 50°C for 24 hours;

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

[0058] (4) After the reduction reaction is completed, the temperature is naturally lowered to room temperature to obtain a graphene heat-conducting film.

[0059] The thermal conductivity of the prepared gra...

Embodiment 2

[0062] A preparation method for a graphene heat conducting film, comprising the steps of:

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

[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, put the graphene oxide film in an oven, and dry at 50°C for 24 hours;

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

[0066] (4) After the reduction reaction is completed, the temperature is naturally lowered to room temperature to obtain a graphene heat-conducting film.

[0067] The thermal conductivity of the prepared graphene thermal film is 1700W / m K;

[0068] The ...

Embodiment 3

[0070] A preparation method for a graphene heat conducting film, comprising the steps of:

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

[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, put the graphene oxide film in an oven, and dry at 50°C for 24 hours;

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

[0074] (4) After the reduction reaction is completed, the temperature is naturally lowered to room temperature to obtain a graphene heat-conducting film.

[0075] The thermal conductivity of the prepared graphene thermal film is 1000W / m K;

[0076] The C...

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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

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Claims

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Application Information

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Owner CHANGZHOU FUXI TECH CO LTD
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