A kind of preparation method of high-quality graphene conductive film
A graphene film, graphene technology, applied in graphene, nano-carbon and other directions, can solve the problems of complex process, low conductivity, pollution, etc., and achieve high controllability of process parameters, simple preparation method, and wide application prospects. Effect
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Embodiment 1
[0023] The concrete steps that present embodiment prepares high-quality graphene conductive film are:
[0024] (1), 10g of natural graphite with a sheet diameter of 100 μm is added to a mixed acid composed of 10ml of concentrated nitric acid (65%) and 30ml of concentrated sulfuric acid (98%) and mixed evenly, then 20g of ferric chloride is added, and the reaction is stirred and reacted at 35 degrees for 12h , filtered, washed with water to pH=7, and dried at 60 degrees Celsius for 8 hours to obtain layered graphite;
[0025] (2), process the layered graphite under 1000w microwave for 3min to obtain the graphite after microwave treatment, the graphite will expand during the treatment process, accompanied by sparks;
[0026] (3), the graphite after the microwave treatment is dispersed in water, and ultrasonically peeled off for 60min at 500w to obtain a graphene aqueous solution with a concentration of 0.5-2mg / ml;
[0027] (4), centrifuge 100ml of graphene aqueous solution with...
Embodiment 2
[0034] The other steps of this embodiment are the same as in Example 1, only when the intercalation agent is added, the intercalation agent added is ammonium nitrate, potassium chlorate, lithium chlorate, potassium oxalate, ammonium oxalate, ammonium carbonate, ammonium bicarbonate, sodium carbonate, One or more of sodium bicarbonate, potassium bicarbonate and iron carbonate, the amount added is the same as ferric chloride, and the performance of the graphene conductive film obtained at last is similar to that of the graphene conductive film obtained in Example 1.
Embodiment 3
[0036] The other steps of this embodiment are the same as in Example 1, only in the film-forming process, the concentration of the ethanol dispersion of graphene is 20 mg / ml, the thickness of the obtained graphene conductive film is 20 μm, and the conductivity is 20000 S / m.
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