Flexible graphene film and application thereof
A technology of flexible graphite and graphene, which is applied in the field of nanomaterials, can solve the problems of difficult control of graphene film flexibility and high production cost, and achieve the effect of excellent flexibility and wide application
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[0056] The preparation method of the flexible graphene film is not specifically limited in the present invention, and the method of rolling or molding known to those skilled in the art can be adopted. In a specific embodiment of the present invention, the molding is preferably performed in a molding die, and the material of the molding die is preferably high-strength stainless steel; the rolling is preferably performed on a roller press.
[0057] The present invention also provides the application of the flexible graphene film described in the above technical solution in electronic equipment.
[0058] In the present invention, since the flexible graphene film has excellent thermal conductivity, it can be used as a heat dissipation element in electronic equipment.
Embodiment 1
[0061] Slowly add 20.0g of natural graphite and 20.0g of potassium permanganate into 500mL of concentrated sulfuric acid solution. During the addition process, use an ice bath to control the temperature below 30°C, and use magnetic force to stir the reaction system. The entire intercalation reaction time is 2h. After the interlayer reaction was completed, the obtained intercalation reaction solution was washed with deionized water until neutral, and dried in a vacuum oven at 40° C. for future use to obtain intercalated graphite. The intercalated graphite was processed in a high-temperature microwave expansion furnace, the temperature was set at 800°C, and the microwave frequency was 100 GHz. The expansion process was carried out under the protection of nitrogen atmosphere, and the expansion time was 10s to obtain expanded graphite. Soak the expanded graphite in 200mL 2mol / L sodium bicarbonate solution for 2h, and then dry it under an infrared lamp to obtain a foaming agent / expa...
Embodiment 2
[0064] Slowly add 20.0g of natural graphite and 20.0g of potassium permanganate into 500mL of concentrated sulfuric acid solution. During the addition process, use an ice bath to control the temperature below 30°C, and use magnetic force to stir the reaction system. The entire intercalation reaction time is 2h. After the interlayer reaction was completed, the obtained intercalation reaction solution was washed with deionized water until neutral, and dried in a vacuum oven at 40° C. for future use to obtain intercalated graphite. The intercalated graphite was processed in a high-temperature microwave expansion furnace with a set temperature of 800°C and a microwave frequency of 100 GHz. The expansion process was carried out under the protection of a nitrogen atmosphere, and the expansion time was 15 s to obtain expanded graphite. Soak the expanded graphite in 200mL 2mol / L sodium bicarbonate solution for 2h, and then dry it under an infrared lamp to obtain a foaming agent / expande...
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