静电纺聚丙烯腈纳米级纤维滤膜的制备及性能

Preparation and Property of Electrostatic Spinning Polyacrylonitrile Nanofiber Filtration Membrane

为了开发高效低阻的纳米级纤维复合滤膜,利用无针头的静电纺丝设备规模化制备了不同质量分数的聚丙烯腈纳米级纤维,并测试了该纳米级纤维复合滤膜的微观结构、透气性能和过滤性能。结果表明:随着纺丝时间的增加,纳米级纤维滤膜的厚度增加,透气率降低,但过滤效率和阻力压降都呈现增加的趋势;随着溶液质量分数的增加,纳米级纤维滤膜的透气率先减小后增加,而过滤效率和阻力压降呈现先增加后减小的趋势。认为:质量分数12%的聚丙烯腈溶液纺制20min得到的滤膜透气率和过滤效率较高,阻力压降相对较小,比较适合开发空气过滤材料。

It is considered that the air permeability and filtration efficiency of the filtration membrane spun by 12%mass fraction polyacrylonitrile solution for 20 mins and the resistance pressure drop is relatively smaller.It is suitable for development as air filtration material.