论文部分内容阅读
采用静电纺丝法制备了聚砜(PSf)纳米纤维作为正渗透复合膜的支撑层,在此基础上通过界面聚合反应制备了正渗透膜。考察了纺丝液自身性质,PSf含量以及溶剂N,N-二甲基甲酰胺(DMF)与N-甲基-2-吡咯烷酮(NMP)比例对PSf支撑层微观结构及其性能影响。结果表明,纺丝液的PSf质量分数为20%,NMP/DMF体积比为3/7时得到的纺丝纤维均匀无瑕疵,平均纤维直径为396 nm,平均孔径为1.34μm,孔隙率为75.77%。经界面聚合反应在PSf支撑层表面形成聚酰胺活性层,经测试其水通量为42.17 L/(m~2·h),比3种商品膜水通量提高了3倍以上。
Polysulfone (PSf) nanofibers were prepared by electrospinning as the support layer for the composite membrane being infiltrated. On the basis of this, PS membranes were prepared by interfacial polymerization. The effects of the properties of the spinning solution, the PSf content, and the ratio of DMF to N-methyl-2-pyrrolidone (NMP) on the microstructure and properties of the PSf support were investigated. The results showed that the average fiber diameter was 396 nm, the average pore diameter was 1.34 μm and the porosity was 75.77, with 20% PSf and 20% NMP / DMF in the volume ratio of 3/7. %. Through the interfacial polymerization, the polyamide active layer was formed on the surface of the PSf support layer. The water flux was 42.17 L / (m ~ 2 · h), which was more than 3 times higher than that of the three commercial membranes.