High-conductivity graphene preparing method
A technology with high conductivity and graphene, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of complexity, product stability, many factors, and many steps, and achieve simple preparation methods and fewer layers , the effect of high conductivity
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Embodiment 1
[0014] Embodiment one: the preparation method of high-conductivity graphene comprises the following steps:
[0015] 1) Put the expandable graphite with an expandability of 51ml / g in a heating furnace and heat it to 650°C for 1min to obtain expanded graphite;
[0016] 2) A certain amount of expanded graphite is dispersed in acetone containing perfluoro-2-butyltetrahydrofuran with a surface tension less than 30 dyn / cm, the mass ratio of the expanded graphite to the organic solvent is 1:200, and the surface active agent The content is 0.01wt%. Under the condition of 25°C, the power of 121W was ultrasonically treated for 2.5h, and then the precipitate was removed by centrifugation at 890 rpm, and then the secondary precipitate was obtained by further centrifugation at 1100 rpm. High conductivity graphene was obtained after the secondary precipitate was dried.
Embodiment 2
[0017] Embodiment two: the preparation method of high-conductivity graphene comprises the following steps:
[0018] 1) Put the expandable graphite with an expandability of 60ml / g in a heating furnace and heat it to 800°C for 30s to obtain expanded graphite;
[0019] 2) A certain amount of expanded graphite is dispersed in tetrahydrofuran containing perfluorotriethylamine with a surface tension less than 30 dyn / cm, the mass ratio of the expanded graphite to the organic solvent is 1:250, and the content of the surface active agent is was 0.75wt%, at 70°C, ultrasonically treated with a power of 150W for 1.5h, then centrifuged at 650 rpm to remove the precipitate, and then further centrifuged at 2000 rpm to obtain the secondary precipitate, and the secondary High conductivity graphene was obtained after the precipitate was dried.
Embodiment 3
[0020] Embodiment three: the preparation method of high-conductivity graphene comprises the following steps:
[0021] 1) Put expandable graphite with an expandability of 80ml / g in a heating furnace and heat it to 700°C for 45s to obtain expanded graphite;
[0022] 2) Disperse a certain amount of expanded graphite in ethanol containing perfluoro-2-butyltetrahydrofuran with a surface tension less than 30 dyn / cm, the mass ratio of the expanded graphite to the organic solvent is 1:100, the surface active agent The content is 1wt%. Under the condition of 100°C, ultrasonic treatment with 200W power for 2h, and then centrifuged at 1000 rpm to remove the precipitate, and then further centrifuged at 3000 rpm to obtain the secondary precipitate, the secondary precipitate After drying, graphene with high conductivity was obtained.
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