Preparation method of highly ordered and compact graphene heat conduction film
A highly ordered, graphene technology, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of broken structure, low thermal and electrical conductivity, inapplicability, etc., to improve the density and size of GO film Thin, high thermal conductivity effect
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Embodiment 1
[0029] S1, the 10mg / mL graphene oxide (GO) solution is centrifuged at a high speed of 25000rpm for 20min at a speed of 25000rpm, poured off the upper clear night, and concentrated to prepare about 50mg / mL of graphene oxide with a nematic phase liquid crystal;
[0030] S2. Add 0.5% reduced graphene oxide (rGO) powder into S1, grind for 10 minutes with a mortar and mix to prepare rGO / GO colloid;
[0031] S3. The colloid prepared in S2 was prepared into an rGO / GO film by tape casting method, and dried in a vacuum oven at 100°C for 2 hours;
[0032] S4. Put the film prepared in S3 into a quartz tube under an atmosphere of argon (200 sccm, 1 atm) at a heating rate of 1° C. / min, heat it up to 1000° C. for 2 hours, and then cool naturally.
[0033] S5. Graphitize the carbonized film of S4 in a graphite furnace, and raise the temperature to 3000° C. in three stages in an argon (200 L / hr) atmosphere.
[0034] The first stage is from normal temperature to 1200°C, the heating rate is 15...
Embodiment 2
[0039] S1, the 10mg / mL graphene oxide (GO) solution is centrifuged at a high speed of 25000rpm for 20min at a speed of 25000rpm, poured off the upper clear night, and concentrated to prepare about 50mg / mL of graphene oxide with a nematic phase liquid crystal;
[0040] S2. Add 1.5% reduced graphene oxide (rGO) powder into S1, grind for 10 minutes with a mortar and mix to prepare rGO / GO colloid;
[0041] S3. The colloid prepared in S2 was prepared into an rGO / GO film by tape casting method, and dried in a vacuum oven at 100°C for 2 hours;
[0042] S4. Put the film prepared in S3 into a quartz tube under an atmosphere of argon (200 sccm, 1 atm) at a heating rate of 1° C. / min, heat it up to 1000° C. for 2 hours, and then cool naturally.
[0043] S5. Graphitize the carbonized film of S4 in a graphite furnace, and raise the temperature to 3000° C. in three stages in an argon (200 L / hr) atmosphere.
[0044] The first stage is from normal temperature to 1200°C, the heating rate is 15...
Embodiment 3
[0049] S1. Centrifuge the 10 mg / mL graphene oxide (GO) solution at 25000 rpm for 20 min at high speed, pour off the supernatant, and concentrate to prepare about 50 mg / mL of graphene oxide with a nematic liquid crystal;
[0050] S2. Add 2.0% reduced graphene oxide (rGO) powder into S1, grind for 10 minutes with a mortar and mix to prepare rGO / GO colloid;
[0051] S3. The colloid prepared in S2 was prepared into an rGO / GO film by tape casting method, and dried in a vacuum oven at 100°C for 2 hours;
[0052] S4. Put the film prepared in S3 into a quartz tube under an atmosphere of argon (200 sccm, 1 atm) at a heating rate of 1° C. / min, heat it up to 1000° C., keep it for 2 hours, and then cool naturally.
[0053] S5. Graphitize the carbonized film of S4 in a graphite furnace, and raise the temperature to 3000° C. in three stages in an argon (200 L / hr) atmosphere.
[0054] The first stage is from normal temperature to 1200°C, the heating rate is 15°C / min; the second stage is 120...
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