摘要
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 nanofibers were prepared by eleetrospinning and using it as substrates to make high-quality thin film nanocomposite forward osmosis membrane.Effect of spinning solution properties,P.SF content and the ratio of N,N-Dimethylformamide and 1-Methyl-2-pyrrolidinone on morphological and characterization of substrates was explored.The results showed that the morphology ofnanofibers were uniform and flawless when the m^s fraction of PSfof spinning dope was 20%and solvent volume ratio of 1-Methyl-2-pyrrolidinone and N,N-Dimethylformamide was 3/7.The average fiber diameter,average pore size,porosity and of the substrates was 396 nm,1.34μm and 75.77%,respectively.The polymer active layer was formed by interfaeial polymerization on the surface ofPSf substrate successfully.After the test,the average water flux was 42.17 L/(m2-h),it was higher than commercial membranes more than three times.
作者
张翠翠
黄满红
李贝贝
李亚丹
ZHANG Cuicui;HUANG Manhong;LI Beibei;LI Yadan(College of Environmental Science and Engineering,State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry,Donghua University,Shanghai 201620,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2017年第8期44-49,共6页
Technology of Water Treatment
基金
国家自然科学基金资助项目(21477018,21007010)
中央高校基本科研业务费专项资金重点项目(15D111323)
关键词
正渗透复合膜
静电纺丝
聚砜
支撑层
forward osmosis composite membrane
electrospun
polysulfone fibers
substrate
