文献类型：期刊文献

英文题名：Effect of air gap induction on the morphological microstructure of polyether sulfone hollow fiber membrane

作者：Jiang, Jinhu[1];Lu, Caiyun[1];Shen, Shiyu[1];Deng, Qifan[1];Wang, Bei[1];Shen, Chunyin[1,2];Wang, Yanli[1];Zhan, Liang[1];Dai, Gance[1]

机构：[1]East China Univ Sci & Technol ECUST, State Key Lab Chem Engn, Shanghai, Peoples R China;[2]East China Univ Sci & Technol ECUST, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2023

卷号：140

期号：37

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20233014436520);WOS:【SCI-EXPANDED(收录号:WOS:001033452100001)】；

基金：Shanghai Eco. Polymer Sci. & Tech Co., Ltd

语种：英文

外文关键词：air gap; finger-like pores; hollow fiber membrane; humidity; polyether sulfone

摘要：Polyether sulfone hollow fiber membrane was prepared via nonsolvent-induced phase separation process using dimethylacetamide (DMAc) as a solvent, Polyvinylpyrrolidone (PVP-K30) and water as additives. The mechanism of air gap environment in the membrane structure formation was studied. The scanning electron microscope microstructure morphology revealed that the air gap environment induced the microstructure formation of membranes. The low humidity air gap environment was not conducive to the surface pore formation and hard to obtain surface pores until lowering the dope solution temperature. The high humidity can easily induce the formation of large out surface pore structure along with the decreases of the surface pore uniformity. As air gap humidity and distance increased, the membrane cross section structure near the outer surface tends to be looser and that near the inner surface became denser, while the proportion of finger-like pores in the cross section initially increased and stabilized. At 100 RH, the average outer surface pore size increased from 0.192 mu m at an air gap distance of 20 cm to 0.351 mu m at 50 cm, the corresponding pore density decreased from 2.66 to 1.13 pores/mu m(2), and the percentage of the inner skin layer thickness increased from 3.26% to 7.69%.