静电纺PAN纳米纤维膜过滤性能研究

Study on the filtration properties of electrospinning PAN nanofiber membrane

为了得到高过滤性能、低压降的纳米纤维过滤材料,研究不同质量分数的聚丙烯腈(PAN)纺丝液在不同纺丝参数下制备的纳米纤维膜,并对其形貌、结构、孔径及过滤性能进行了表征。结果表明,随着PAN质量分数的增大,静电纺丝得到的纳米纤维直径增大,纤维膜平均孔径增大,过滤效率先增大后减小。随着施加电压的增大,制备的纳米纤维直径变小,纤维膜平均孔径减小,过滤效率增大。随着注射速度的增大,制备的纳米纤维直径变化不大,纤维孔径更均匀,过滤效率得到提升。研究得到最佳的静电纺丝参数为:PAN质量分数18%,施加电压18 k V,注射速度1.5 m L/h。

In order to obtain a high performance and low-resistance nanofiber filtration material,we got nanofiber membrane with different mass fraction of polyacrylonitrile( PAN) solution and different electrospinning parameters, then tested and researched its morphology,structure,factor porosity and filterable performance. The results showed that the diameter of nanofiber increased and the average pore size of fiber membrane induced as the increasing of mass fraction of PAN,the filtration efficiency increased initially but decreased after the increasing of mass fraction of PAN. The diameter and of nanofiber and the average pore size of fiber membrane decreased as the increasing of the voltage,the filtration efficiency was higher. Changing the injection speed has no obvious effect on the fiber diameter,but the biger injection speed could make the fibers pore more uniform and filtration efficiency higher. Finally,the best electrospinning parameters are 18% of the PAN mass fraction,18 k V of the voltage,1. 5m L / h of the injection speed.