PI/graphene oxide/graphene composite film as well as preparation method and application thereof
A graphene composite, graphene technology, applied in the direction of graphene, chemical instruments and methods, carbon compounds, etc., can solve the problems of high preparation cost of thermal conductive film, poor mechanical strength of thermal conductive film, heavy pollution, etc., and achieve good application prospects, Low cost, high heat flux effect
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[0034] The invention provides a PI / graphene oxide / graphene composite film and its preparation method and application.
[0035] In the first aspect, the present invention provides a kind of PI / graphene oxide / graphene composite film, comprising:
[0036] PI layer with a thickness of 10-80 μm;
[0037] Graphene layer with a thickness of 10-500 μm;
[0038] A graphene oxide layer is interposed between the PI layer and the graphene layer; the thickness of the graphene oxide layer is 5-50 μm.
[0039] The PI / graphene oxide / graphene composite film can undergo subsequent processing, and the subsequent processing steps can include carbonization, graphitization and other steps. Without being limited to any theory, the inventor believes that: during the high-temperature carbonization and graphitization process of PI, the oxygen-containing and nitrogen-containing functional groups are cracked, and CO, CO 2 , N 2 When small molecular substances escape, polycondensation reaction occurs ...
Embodiment 1
[0082] This embodiment provides a PI / graphene oxide / graphene composite film. include:
[0083] PI layer with a thickness of 38 μm;
[0084] A graphene layer with a thickness of 50 μm;
[0085] A graphene oxide layer is interposed between the PI layer and the graphene layer; the thickness of the graphene oxide layer is 8 μm.
[0086] Prepared as follows:
[0087] (1) Coating the graphene oxide slurry with a concentration of 1.2% on the PI film to obtain a PI / graphene oxide composite film; wherein, the coating thickness is 2.5 mm, the coating speed is 1 m / min, and the drying temperature is 110 °C. ℃.
[0088] (2) With the described PI / graphene oxide composite film that step (1) obtains as coating substrate, the graphene slurry that concentration is 6.5% is coated on described PI / graphene oxide composite film, through Dry to obtain the PI / graphene oxide / graphene composite film; wherein, the coating thickness is 1.54mm, the coating speed is 1m / min, and the drying temperature ...
Embodiment 2
[0090] This embodiment provides a kind of PI / graphene oxide / graphene composite film, compared with embodiment 1, the only difference is:
[0091] PI layer with a thickness of 50 μm;
[0092] A graphene layer with a thickness of 110 μm;
[0093] A graphene oxide layer is interposed between the PI layer and the graphene layer; the thickness of the graphene oxide layer is 15 μm.
[0094] Prepared as follows:
[0095] (1) Coating the graphene oxide slurry with a concentration of 4.8% on the PI film to obtain a PI / graphene oxide composite film; wherein, the coating thickness is 2.25mm, the coating speed is 1m / min, and the drying temperature is 110 ℃.
[0096] (2) With the described PI / graphene oxide composite film that step (1) obtains as coating substrate, the graphene slurry that concentration is 6.5% is coated on described PI / graphene oxide composite film, through Dry to obtain the PI / graphene oxide / graphene composite film; wherein, the coating thickness is 3mm, the coating ...
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Abstract
Description
Claims
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