Graphene/polyimide composite membrane and preparation method thereof
A composite film and polyimide technology, applied in the field of graphene/polyimide composite film and its preparation, can solve the problems of poor mechanical properties and flexibility, low thermal conductivity of graphite film, etc., and achieve good bending resistance Performance, high thermal conductivity, good flexibility effect
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Embodiment 1
[0051] A kind of preparation method of graphene / polyimide composite film specifically comprises steps as follows:
[0052] (1) Control the power to 300W and ultrasonicate for 10 minutes at a frequency of 40kHz to dissolve 4,4'-diaminodiphenyl ether and pyromellitic dianhydride in N,N-dimethylformamide respectively to obtain 4, 4'-diaminodiphenyl ether solution and pyromellitic dianhydride solution;
[0053] Then, add graphene oxide powder to the 4,4'-diaminodiphenyl ether solution and pyromellitic dianhydride solution obtained above, and then use 300W power and 40kHz ultrasonic wave for 30min to make the graphene oxide uniform dispersed in 4,4'-diaminodiphenyl ether solution and pyromellitic dianhydride solution to obtain graphene oxide / pyromellitic dianhydride mixed solution and graphene oxide / 4,4'-diamino diphenyl ether solution;
[0054] In the above graphene oxide / 4,4'-diaminodiphenyl ether solution, the amount of 4,4'-diaminodiphenyl ether, graphene oxide powder and N,N...
Embodiment 2
[0064] A kind of preparation method of graphene / polyimide composite film specifically comprises steps as follows:
[0065] (1) Control the power to 300W and ultrasonicate for 10 minutes at a frequency of 40kHz to dissolve 4,4'-diaminodiphenyl ether and pyromellitic dianhydride in N,N-dimethylformamide respectively to obtain 4, 4'-diaminodiphenyl ether solution and pyromellitic dianhydride solution;
[0066] Then, add graphene oxide powder to the 4,4'-diaminodiphenyl ether solution and pyromellitic dianhydride solution obtained above, and then use 300W power and 40kHz ultrasonic wave for 30min to make the graphene oxide uniform dispersed in 4,4'-diaminodiphenyl ether solution and pyromellitic dianhydride solution to obtain graphene oxide / pyromellitic dianhydride mixed solution and graphene oxide / 4,4'-diamino diphenyl ether solution;
[0067] In the above graphene oxide / 4,4'-diaminodiphenyl ether solution, the amount of 4,4'-diaminodiphenyl ether, graphene oxide powder and N,N...
Embodiment 3
[0077] A kind of preparation method of graphene / polyimide composite film specifically comprises steps as follows:
[0078] (1) Control the power to 300W and ultrasonicate for 10 minutes at a frequency of 40kHz to dissolve 4,4'-diaminodiphenyl ether and pyromellitic dianhydride in N,N-dimethylformamide respectively to obtain 4, 4'-diaminodiphenyl ether solution and pyromellitic dianhydride solution;
[0079] Then, add graphene oxide powder to the 4,4'-diaminodiphenyl ether solution and pyromellitic dianhydride solution obtained above, and then use 300W power and 40kHz ultrasonic wave for 30min to make the graphene oxide uniform dispersed in 4,4'-diaminodiphenyl ether solution and pyromellitic dianhydride solution to obtain graphene oxide / pyromellitic dianhydride mixed solution and graphene oxide / 4,4'-diamino diphenyl ether solution;
[0080]In the above graphene oxide / 4,4'-diaminodiphenyl ether solution, the amount of 4,4'-diaminodiphenyl ether, graphene oxide powder and N,N-...
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