Preparation method for graphene oxide-modified PAN carbon fiber precursor
A technology of graphene modification and fiber precursor, which is applied in the direction of spinning solution preparation, wet spinning, etc., can solve the problems of not easy to dissolve, not suitable for large-scale application, and high cost of carbon nanotubes, and achieve low cost, The effect of high degree of orientation and simple preparation method
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Embodiment 1
[0024] Disperse 0.41g of graphene oxide (the mass percentage of graphene oxide in the total monomer is 0.5%) in 300ml of dimethyl sulfoxide, 400w ultrasonic 3h (graphene oxide sheet size is 50nm), until it is uniformly dispersed, Add it into a four-necked flask, and measure 100ml in turn (density is 0.806g / cm 3 ) acrylonitrile, 1.65g of acrylamide and 0.41g of azobisisobutyronitrile were added into a four-necked flask, stirred and blown with nitrogen, and reacted at 65°C for 20h to form a uniform spinning stock solution. The spinning stock solution is spun after single removal and defoaming, and the stock solution temperature is 70°C. The coagulation bath is an aqueous solution of dimethyl sulfoxide with a concentration of 55%, and the temperature of the coagulation bath is 40°C. The spinning speed is 2.39m / min, the draft ratio is 4.5, and the PAN fibers containing graphene oxide are obtained after subsequent washing and drying.
[0025] X-ray diffraction analysis was carrie...
Embodiment 2
[0027] Disperse 0.41g of graphene oxide (the mass percentage of graphene oxide in the total monomer is 0.5%) in 300ml of dimethyl sulfoxide, 400w ultrasonic 5h (graphene oxide sheet size is 40nm), until it is uniformly dispersed, Add it into a four-necked flask, and measure 100ml in turn (density is 0.806g / cm 3 ) acrylonitrile, 1.65g of acrylamide and 0.41g of azobisisobutyronitrile were added into a four-necked flask, stirred and blown with nitrogen, and reacted at 65°C for 20h to form a uniform spinning stock solution. The spinning stock solution is spun after single removal and defoaming, and the stock solution temperature is 70°C. The coagulation bath is an aqueous solution of dimethyl sulfoxide with a concentration of 55%, and the temperature of the coagulation bath is 40°C. The spinning speed is 2.39m / min, the draft ratio is 4.5, and the PAN fibers containing graphene oxide are obtained after subsequent washing and drying.
[0028] X-ray diffraction analysis was carrie...
Embodiment 3
[0030] Disperse 0.41g of graphene oxide (the mass percentage of graphene oxide in the total monomer is 0.5%) in 300ml of dimethyl sulfoxide, 400w ultrasonic 12h (graphene oxide sheet size is 25nm), until it is uniformly dispersed, Add it into a four-necked flask, and measure 100ml in turn (density is 0.806g / cm 3 ) acrylonitrile, 1.65g of acrylamide and 0.41g of azobisisobutyronitrile were added into a four-necked flask, stirred and blown with nitrogen, and reacted at 65°C for 20h to form a uniform spinning stock solution. The spinning stock solution is spun after single removal and defoaming, and the stock solution temperature is 70°C. The coagulation bath is an aqueous solution of dimethyl sulfoxide with a concentration of 55%, and the temperature of the coagulation bath is 40°C. The spinning speed is 2.39m / min, the draft ratio is 4.5, and the PAN fibers containing graphene oxide are obtained after subsequent washing and drying.
[0031] X-ray diffraction analysis was carri...
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