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题名: Characterization of morphology controlled polyethersulfone hollow fiber membranes by the addition of polyethylene glycol to the dope and bore liquid solution
作者: Liu, Y;  Koops, GH;  Strathmann, H
关键词: polyethersulfone ;  polyethylene glycol ;  hollow fiber ;  ultrafiltration ;  permporometry ;  pore size ;  macrovoid
刊名: JOURNAL OF MEMBRANE SCIENCE
发表日期: 2003-09-15
DOI: 10.1016/S0376-7388(03)00322-3
卷: 223, 期:1-2, 页:187-199
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology ;  Physical Sciences
类目[WOS]: Engineering, Chemical ;  Polymer Science
研究领域[WOS]: Engineering ;  Polymer Science
英文摘要: The preparation of polyethersulfone (PES) hollow fiber membranes has been studied using N-methylpyrrolidone (NMP) as solvent, polyethylene glycol 400 (PEG 400) as weak nonsolvent and water as strong nonsolvent. When PEG 400 is used as polymeric additive to the spinning dope the viscosity of the PES solution is strongly enhanced. Furthermore, it was observed that PEG 400 could be added to the solution in large amounts without causing phase separation (NMP/PEG ratio 1:9, PES concentration approximately 11 wt.%). Membranes prepared from a solution containing a NMP/PEG ratio of 1:1 results in higher fluxes than when a ratio of 1:4 is used. Similar fluxes were obtained for PES concentrations of 16 and 20 wt.%. Looking at the fiber cross-section it became clear that macrovoid formation could not be suppressed by the addition of PEG 400 alone, not even at concentrations as high as 38 wt.%. Only when relatively large amounts of water were added to the dope solution macrovoids disappeared and nice spongy structures were obtained. Variation of the bore liquid composition using the components NMP, PEG 400 and water showed to be a powerful method to control the pore size of the bore surface. Pores of 5-28 nm were obtained in combination with high pure water fluxes; e.g. a membrane with pores of 7 nm had a pure water flux of 9401/(m(2) h bar) and showed 100% BSA retention. When an air gap larger than 10 mm was applied the shell surface contained relatively large pores. Spinning directly in water (air gap = 0) resulted in shell side pores of 8-10 nm, while an air gap of 10 mm resulted in pore sizes of 40-54 nm. (C) 2003 Elsevier B.V. All rights reserved.
关键词[WOS]: PHASE-INVERSION MEMBRANES ;  BATH COAGULATION METHOD ;  ULTRAFILTRATION MEMBRANES ;  MICROPOROUS MEMBRANES ;  SIZE DISTRIBUTION ;  POLYSULFONE ;  SEPARATION ;  MICROSTRUCTURES ;  NONSOLVENT
语种: 英语
WOS记录号: WOS:000186126100015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138379
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.Univ Twente, Membrane Technol Grp, EMI, Dept Sci & Technol, NL-7500 AE Enschede, Netherlands
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Liu, Y,Koops, GH,Strathmann, H. Characterization of morphology controlled polyethersulfone hollow fiber membranes by the addition of polyethylene glycol to the dope and bore liquid solution[J]. JOURNAL OF MEMBRANE SCIENCE,2003,223(1-2):187-199.
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