Method for producing graphene/polyimide copolymerized heat-conduction membrane

A technology of polyimide copolymerized heat conduction film and polyimide, which is applied in the field of preparation of graphene/polyimide copolymer heat conduction film, can solve the problem of high cost, improve heat conduction performance, process is simple and easy to operate, and reduce The effect of interfacial thermal resistance

Inactive Publication Date: 2016-11-09
斯迪克新型材料(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For above-mentioned deficiencies in the prior art, the present invention provides a kind of simple method to synthesize graphene / polyimide copolymerization heat-conducting film, this method not only overcomes the problem that the high cost that high energy consumption causes, and graphene can be very good Dispersed in the matrix, it improves the compatibility with the matrix, reduces the influence of the thermal resistance between the interfaces, and is beneficial to the heat conduction of the composite film material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Graphene oxide was synthesized by the improved Hummers method, specifically as follows: 3.0 g of graphite and 18.0 g of potassium permanganate were added to a mixture of concentrated sulfuric acid: concentrated phosphoric acid (360:40 ml), and the reaction was stirred at 50° C. for 12 hours. Pour the reaction solution into 400 ml of ice water + 3 ml of hydrogen peroxide, and after the temperature drops to room temperature, centrifuge at 4000 rpm for 4 hours, then wash with 200 ml of distilled water, 200 ml of 30% hydrochloric acid, and 200 ml of ethanol in sequence. All were centrifuged at 4000 rpm for 4 hours, then ether was added, filtered with suction, and vacuum-dried at room temperature to obtain graphene oxide.

[0030] Preparation of 4,4'-diaminodiphenyl ether chemically modified graphene oxide by amidation reaction: 200 mg of graphene oxide powder was ultrasonically dispersed in 200 ml of N,N-dimethylformamide solvent, sonicated for 2.5 hours , to obtain a graph...

Embodiment 2

[0035]Graphene oxide was synthesized by the improved Hummers method, specifically as follows: 3.0 grams of graphite and 18.0 grams of potassium permanganate were added to concentrated sulfuric acid: concentrated phosphoric acid (360:40 ml) mixture, and stirred at 50 ° C for 12 hours. Pour the reaction solution into 400 ml of ice water + 3 ml of hydrogen peroxide, and after the temperature drops to room temperature, centrifuge at 4000 rpm for 4 hours, then wash with 200 ml of distilled water, 200 ml of 30% hydrochloric acid, and 200 ml of ethanol in sequence. All were centrifuged at 4000 rpm for 4 hours, then ether was added, filtered with suction, and vacuum-dried at room temperature to obtain graphene oxide.

[0036] Preparation of 4,4'-diaminodiphenyl ether chemically modified graphene oxide by amidation reaction: 200 mg of graphene oxide powder was ultrasonically dispersed in 200 ml of N,N-dimethylformamide solvent, sonicated for 2.5 hours , to obtain a graphene oxide suspe...

Embodiment 3

[0041] Graphene oxide was synthesized by the improved Hummers method, specifically as follows: 3.0 grams of graphite and 18.0 grams of potassium permanganate were added to concentrated sulfuric acid: concentrated phosphoric acid (360:40 ml) mixture, and stirred at 50 ° C for 12 hours. Pour the reaction solution into 400 ml of ice water + 3 ml of hydrogen peroxide, and after the temperature drops to room temperature, centrifuge at 4000 rpm for 4 hours, then wash with 200 ml of distilled water, 200 ml of 30% hydrochloric acid, and 200 ml of ethanol in sequence. All were centrifuged at 4000 rpm for 4 hours, then ether was added, filtered with suction, and vacuum-dried at room temperature to obtain graphene oxide.

[0042] Preparation of 4,4'-diaminodiphenyl ether chemically modified graphene oxide by amidation reaction: 200 mg of graphene oxide powder was ultrasonically dispersed in 200 ml of N,N-dimethylformamide solvent, sonicated for 2.5 hours , to obtain a graphene oxide susp...

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Abstract

The invention discloses a method for producing a graphene / polyimide copolymerized heat-conduction membrane. The method overcomes the problem of high cost due to high energy consumption, graphene can be better dispersed in a matrix, compatibility between graphene and the matrix is increased, thermal resistance influence between interfaces is reduced, and the heat-conduction membrane is in favor of heat conduction of the composite film materials.

Description

technical field [0001] The invention belongs to the field of graphene heat-conducting materials, and in particular relates to a preparation method of a graphene / polyimide copolymerized heat-conducting film. Background technique [0002] With the continuous development and progress of science and technology, electronic products are becoming more and more intelligent and complex, and there are more and more electronic components inside the products, and the integration level is constantly improving. During the operation, a lot of heat will be generated, which is easy to accumulate and form high temperature, and the generation of high temperature will reduce the performance, reliability and service life of electronic products. Therefore, the current electronics industry has put forward higher and higher requirements for heat dissipation materials, which are the core components of thermal control systems, and there is an urgent need for a high-efficiency heat-conducting, lightwe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/52C04B35/524C04B35/622
CPCC04B35/522C04B35/524C04B35/62218C04B2235/9607
Inventor 金闯吴咤朱先磊宇海银葛志远
Owner 斯迪克新型材料(江苏)有限公司
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