A preparation method of polycarbonate/polyimide composite fiber membrane containing fluorine-terminated structure
A technology of composite fiber membrane and polycarbonate, applied in the direction of structural parts, fiber treatment, fiber type, etc., to achieve the effect of improving liquid retention rate, enriching pore structure, and good air permeability
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Embodiment 1
[0029] Weigh 2.00g of 4,4'-diaminodiphenyl ether, stir and dissolve in 50gDMF in an ice-water bath, keep the ice-water bath, add 2.20g of pyromellitic dianhydride into the reaction system three times, and mechanically stir in the ice-water bath for 24h Finally, polyamic acid solution is obtained; an appropriate amount of polyamic acid solution is electrospun under the conditions that the spinning voltage is 15kV, the propulsion rate is 0.01mL / min, the spinning receiving distance is 20cm, and the needle of the syringe is 8#, The polyamic acid fiber membrane was prepared by spinning at room temperature for 8 hours; the polyamic acid fiber membrane was placed in an oven, and dried at 150°C, 200°C, 250°C and 300°C for 30 minutes for imidization to obtain polyimide Amine fiber membrane; adopt the polycarbonate having main chain structure described in following formula (3) and end capping structure described in following formula (4), preparation mass concentration is the polycarbonat...
Embodiment 2
[0032] Weigh 2.40g of 4,4'-diaminodiphenyl ether, stir and dissolve in 50gDMF in an ice-water bath, keep the ice-water bath, add 2.62g of pyromellitic dianhydride into the reaction system in three times, and mechanically stir in the ice-water bath for 12h Finally, polyamic acid solution is obtained; an appropriate amount of polyamic acid solution is electrospun under the conditions that the spinning voltage is 15kV, the propulsion rate is 0.01mL / min, the spinning receiving distance is 20cm, and the needle of the syringe is 8#, The polyamic acid fiber membrane was prepared by spinning at room temperature for 2 hours; the polyamic acid fiber membrane was placed in an oven, and dried at 150°C, 200°C, 250°C and 300°C for 30 minutes respectively for imidization to obtain polyimide Amine fiber membrane; adopt the polycarbonate having main chain structure described in following formula (5) and end capping structure described in following formula (6), preparation mass concentration is ...
Embodiment 3
[0035]Weigh 1.60g of 4,4'-diaminodiphenyl ether, stir and dissolve in 30gDMF in an ice-water bath, keep the ice-water bath, add 1.76g of pyromellitic dianhydride into the reaction system three times, and mechanically stir in the ice-water bath for 18h Finally, polyamic acid solution is obtained; an appropriate amount of polyamic acid solution is electrospun under the conditions that the spinning voltage is 15kV, the propulsion rate is 0.01mL / min, the spinning receiving distance is 20cm, and the needle of the syringe is 8#, The polyamic acid fiber membrane was prepared by spinning at room temperature for 6 hours; the polyamic acid fiber membrane was placed in an oven, and dried at 150°C, 200°C, 250°C and 300°C for 30 minutes for imidization to obtain polyimide Amine fiber film; adopt the polycarbonate having main chain structure described in following formula (7) and end capping structure described in following formula (8), the polycarbonate DMF solution that preparation mass co...
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