Graphite film composite body and preparation method thereof
A technology of graphite film and composite, which is applied in the field of graphite film polymer composite and its manufacturing, can solve the problems of graphite film composite such as low flexural strength, easy peeling, complicated process, etc., and achieve strong interlayer bonding, The effect of good interlayer bonding force and simple preparation method
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Embodiment 1
[0048] 1. S101, stacking, stacking 300 commercial expanded graphite films (the first type of graphite film) with a size of 10cm×10cm and a thickness of 50μm layer by layer to form a graphite film laminate.
[0049] 2. S102, one impregnation, take 200g of n-butanol and 600g of xylene, mix 800g of diluent according to the ratio of 1:3, then add 800g of diluent to 800g of bisphenol F epoxy resin, stir well, and then add 200g of polyamide resin is used as a curing agent, and stirred evenly to obtain a liquid polymer binder; the graphite film laminate is placed in a mold, and the mold is placed in a vacuum impregnation furnace, and the vacuum impregnation furnace starts to evacuate until the pressure is 10Pa , the temperature in the impregnation furnace is 25°C, open the fluid valve of the vacuum impregnation furnace, flow the liquid polymer binder into the mold, close the fluid valve, immerse for 3 hours, and the pressure is 10Pa, the liquid polymer binder passes through the graphi...
Embodiment 2
[0056] 1. S101, stacking, stacking 200 commercial pyrolytic graphite films (the second type of graphite film) with a size of 5cm×5cm and a thickness of 40μm layer by layer to make a graphite film laminate.
[0057] 2. S102, one impregnation, take 200g of n-butanol and 600g of xylene, mix 800g of diluent according to the ratio of 1:3, then add 800g of diluent to 800g of bisphenol F epoxy resin, stir well, and then add 200g of polyamide resin is used as a curing agent, and stirred evenly to obtain a liquid polymer binder, the graphite film laminate is placed in a mold, the mold is placed in a vacuum impregnation furnace, and the vacuum impregnation furnace starts to evacuate until the pressure is 10Pa , the temperature in the impregnation furnace is 25°C, open the fluid valve of the vacuum impregnation furnace, flow the liquid polymer binder into the mold, close the fluid valve, impregnate for 1.5h, and the pressure is 10Pa, the liquid polymer binder passes through the graphite f...
Embodiment 3
[0064]1. S101, stacking, stacking 100 self-made graphite films with a size of 5cm×5cm and a thickness of 20μm layer by layer to make a graphite film laminate. The graphite film used is the third type of graphite film, which is prepared from graphene oxide. For the specific method, please refer to UltrathinFlexible Graphene Film: An Excellent Thermal Conducting Material with Efficient EMI Shielding (Advanced Functional Materials, 24(2014), 4542–4548). The specific steps are as follows: 1) Take 5g of graphene oxide and dissolve it in 5000mL deionized water, and stir it ultrasonically for 1h; 2) Then pour it into a polytetrafluoroethylene watch glass, dry it at 50°C for 10h, remove the water, and get graphite oxide at the bottom of the watch glass Graphene oxide film, because the graphene oxide film is poorly bonded to the bottom PTFE, so the graphene oxide film can be peeled off to obtain an independent graphene oxide film; 3) Subsequently, the graphene oxide film is placed in gr...
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