A kind of preparation method of graphene paper and corresponding graphene paper
A technology of graphene paper and graphene microchips, which is applied in the direction of graphene, chemical instruments and methods, nano-carbon, etc., can solve the problem of poor heat dissipation of graphene paper, and achieve the effect of less impurity content and good three-dimensional thermal conductivity
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Embodiment 1
[0031] (1) Heat the graphene oxide microflakes with a diameter of 0.30mm to 200°C, and pass through a 50-mesh sieve to remove fines and impurities;
[0032] (2) Pump the graphene oxide microchips processed in step (1) into the distributor tank, and distribute them evenly to an appropriate thickness and width, and spray alcohol with a concentration of 90% on the graphene oxide during the uniform distribution on microchip;
[0033] (3) The evenly distributed material prepared in step (2) is sent into the first gravity roller press, and after centering, gravity roller press is carried out, and the applied pressure is 75MPa. Heating, the temperature is 180°C, and the rolling speed is 1m / min. Subsequent trimming, while recovering the solution discharged by rolling;
[0034] (4) Send the material rolled in step (3) into the second gravity roller press, and then continue to roll, the applied pressure is 80MPa, the large roller shaft of the second gravity roller press is heated inte...
Embodiment 2
[0038] (1) Heat the graphene oxide microflakes with a diameter of 0.25mm to 250°C, and pass through a 60-mesh sieve to remove fines and impurities;
[0039] (2) pump the graphene oxide microchips processed in step (1) into the distributor tank, and distribute them evenly to an appropriate thickness and width, and spray a mixture of alcohol and paraffin with a concentration of 98% between the uniform distribution Drenched on the graphene oxide microchip, wherein the proportioning of the mixed solution is 80wt% alcohol and 20wt% paraffin;
[0040] (3) The uniformly distributed material prepared in step (2) is sent into the first gravity roller press, and after centering, gravity roller press is carried out, and the applied pressure is 80MPa. Heating, the temperature is 200°C, and the rolling speed is 2m / min. Subsequent trimming, while recovering the solution discharged by rolling;
[0041] (4) Send the material rolled in step (3) into the second gravity roller press, and then ...
Embodiment 3
[0045] (1) Heat the graphene oxide microflakes with a diameter of 0.21mm to 300°C, and pass through a 70-mesh sieve to remove fines and impurities;
[0046] (2) pump the graphene oxide microchips processed in step (1) into the distributor tank, and distribute them evenly to an appropriate thickness and width, and spray a mixture of alcohol and paraffin with a concentration of 98% between the uniform distribution Drizzle on graphene oxide microchips, wherein the proportioning of the mixed solution is 70wt% alcohol and 30wt% paraffin;
[0047] (3) Send the evenly distributed material obtained in step (2) into the first gravity roller press, and carry out gravity roller press after centering, and the applied pressure is 90MPa. Heating, the temperature is 200°C, and the rolling speed is 2.5m / min. Subsequent trimming, while recovering the solution discharged by rolling;
[0048](4) Send the material rolled in step (3) into the second gravity roller press, and then continue to rol...
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