静电-气流接替牵伸纺制PAN亚百纳米纤维及参数探讨

Preparation and parameters discussion of PAN sub-hundred nanofibers based on electrostatic-air flow successive drafting

针对现有方法制备亚百纳米纤维成纤率低、结构不可控、纺丝条件要求高等问题,选择聚丙烯腈(PAN)作为模型聚合物,提出一种静电-气流接替牵伸低黏高电导率射流制备亚百纳米纤维的方法。研究了亚百纳米纤维的成形过程及机理,探讨了纺丝工艺参数,表征了纤维膜的力学性能。结果表明:当PAN溶液质量分数为9%、TBAC质量分数为0.3%、电压为17 kV、气流压力为0.1 MPa时,能够获得平均直径为90.91 nm的PAN亚百纳米纤维;制备的PAN亚百纳米纤维膜的断裂强度显著增加,为7.24 MPa,是常规静电纺丝制备的PAN纳米纤维膜断裂强度的2倍。

In view of the limitations of reported methods to prepare sub-hundred nanofibers,such as low fiber forming rate,uncontrollable fiber structure,and high spinning conditions,Polyacrylonitrile(PAN)is selected as the model polymer,and a method of preparing sub-hundred nanofibers by electrostatic-airflow successive drafting solution jet with low viscosity and high conductivity is proposed.The forming process and mechanism of sub-hundred nanofibers are researched,the spinning parameters are discussed,and the mechanical properties of the fiber membranes are characterized.The results show that when the concentration of PAN solution is 9%,the content of TBAC is 0.3%,the voltage is 17 kV,and the airflow pressure is 0.1 MPa,the average diameter of PAN nanofibers is 90.91 nm,and the breaking strength of the prepared PAN sub-hundred nanofiber membrane is significantly increased,which is twice the breaking strength of the PAN nanofiber membrane prepared by conventional electrospinning.