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
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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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