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题名: Investigation of the dynamics membrane formation by of poly(ether sulfone) membrane formation by precipitation immersion
作者: Li, ZS;  Jiang, CZ
关键词: conformational state ;  initial state ;  membranes ;  phase separation ;  poly-(ether sulfones)
刊名: JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
发表日期: 2005-03-01
DOI: 10.1002/polb.20353
卷: 43, 期:5, 页:498-510
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Polymer Science
研究领域[WOS]: Polymer Science
英文摘要: Cast-leaching experiments were carried out to investigate the dynamics of membrane formation by immersion precipitation, with an emphasis on the outflow of the solvent from casting solutions during the phase-separation process. The casting solutions, consisting of poly(ether sulfone) as the polymer, N-methyl-2-pyrolidone as the solvent, and water (H2O), isopropyl alcohol, 1-butanol, and diethylene glycol as nonsolvent additives (NSAs), were immersed in a coagulation bath. Two thermodynamically vastly different coagulants - H2O, a strong coagulant, and ethylene glycol, a weak coagulant - were used to study the effect of the coagulant on the dynamics of membrane formation. The results showed that the outflow of the solvent during the initial stage of membrane formation was controlled by Fickian diffusion within the extremely wide range of conditions studied, that is, polymer concentrations of 10-38%, approaching ratios of 0-0.95, and thermodynamically vastly different NSAs and coagulants. The role of the initial state of the membrane-forming solution, especially the conformational state of macromolecules in the membrane-forming process, was examined. In contrast to those works on the behavior of small molecules, an attempt was made to qualitatively interpret membrane formation from the viewpoint of macromolecules. (C) 2005 Wiley Periodicals, Inc.
关键词[WOS]: PHASE-INVERSION PROCESS ;  ASYMMETRIC POLYSULFONE MEMBRANES ;  MASS-TRANSFER ;  DIFFUSION-EQUATIONS ;  POLYMERIC MEMBRANES ;  SOLVENT QUALITY ;  NONSOLVENT ;  SEPARATION ;  MECHANISM ;  POLYETHERSULFONE
语种: 英语
WOS记录号: WOS:000227015500004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139868
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Li, ZS,Jiang, CZ. Investigation of the dynamics membrane formation by of poly(ether sulfone) membrane formation by precipitation immersion[J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,2005,43(5):498-510.
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