Improving membrane distillation performance: Morphology optimization of hollow fiber membranes with selected non-solvent in dope solution 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Chemosphere: Environmental toxicology and risk assessment
年/卷/期
2019 / 230 / Sep.
页码
117-126
ISSN号
0045-6535
作者单位
Kyungnam Univ, Civil Engn Dept, Chang Won 631701, South Korea;Univ Technol Sydney, Sch Civil & Environm Engn, Ctr Technol Water & Wastewater, POB 123,15 Broadway, Sydney, NSW 2007, Australia;Univ Technol Sydney, Sch Civil & Environm Engn, Ctr Technol Water & Wastewater, POB 123,15 Broadway, Sydney, NSW 2007, Australia;Univ Technol Sydney, Sch Civil & Environm Engn, Ctr Technol Water & Wastewater, POB 123,15 Broadway, Sydney, NSW 2007, Australia;Univ Technol Sydney, Sch Civil & Environm Engn, Ctr Technol Water & Wastewater, POB 123,15 Broadway, Sydney, NSW 2007, Australia;Korea Inst Civil Engn & Bldg Technol KICT, Dept Land Water & Environm Res, 283 Goyang Daero, Goyang Si 10223, Gyeonggi Do, South Korea;Univ Technol Sydney, Sch Civil & Environm Engn, Ctr Technol Water & Wastewater, POB 123,15 Broadway, Sydney, NSW 2007, Australia;
作者
Kim, Seung-Hyun;Yao, Minwei;Ren, Jiawei;Shon, Ho Kyong;Akther, Nawshad;Woo, Yun Chul;Tijing, Leonard D.;
摘要
This study aimed at improving membrane distillation (MD) performance by mixing various non-solvents (NSs) in polymer dope solutions. The effect of each NS on the inner structure and surface morphology of hollow fiber (HF) membrane was investigated. Membrane morphology is manipulated by controlling liquid-liquid (L-L) and solid-liquid (S-L) demixing time, which is a function of the viscosity and water affinity of dope solutions. Consequently, the addition of NSs altered membrane morphology by affecting the diffusion rate during NS induced phase separation (NIPS) process. The performance results showed that the dope solution composed of 11/71.2/17.8 wt% polyvinylidene fluoride (PVDF)/triethyl phosphate (TEP)/toluene produced the most promising HF membrane for MD. The optimal membrane demonstrated a unique bicontinuous structure with increased porosity and mean pore size. The addition of toluene as NS in dope solutions enhanced crystallization process, which increased the Young's modulus of membrane but slightly decreased its maximum tensile strength at break. The optimal PVDF HF membrane demonstrated a steady flux of 18.9 LMH at 60 degrees C/20 degrees C of feed/permeate temperatures and a salt rejection of 99.99% when tested for 72 h. The results suggest that incorporation of toluene as a NS into PVDF dope solutions can increase permeation performance in MD by enhancing the morphology of HF membranes. (C) 2019 Elsevier Ltd. All rights reserved.
机翻摘要
暂无翻译结果,您可以尝试点击头部的翻译按钮。
关键词/主题词
Hollow fiber membrane;Membrane distillation;NIPS;Morphology;Non-solvent;Crystallinity;
若您需要申请原文,请登录。

最新评论

暂无评论。

登录后可以发表评论

意见反馈
返回顶部