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Characterization of morphology controlled polyethersulfone hollow fiber membranes by the addition of polyethylene glycol to the dope and bore liquid solution
Liu, Y; Koops, GH; Strathmann, H
KeywordPolyethersulfone Polyethylene Glycol Hollow Fiber Ultrafiltration Permporometry Pore Size Macrovoid
Source PublicationJOURNAL OF MEMBRANE SCIENCE
2003-09-15
DOI10.1016/S0376-7388(03)00322-3
Volume223Issue:1-2Pages:187-199
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
WOS SubjectEngineering, Chemical ; Polymer Science
WOS Research AreaEngineering ; Polymer Science
WOS KeywordPHASE-INVERSION MEMBRANES ; BATH COAGULATION METHOD ; ULTRAFILTRATION MEMBRANES ; MICROPOROUS MEMBRANES ; SIZE DISTRIBUTION ; POLYSULFONE ; SEPARATION ; MICROSTRUCTURES ; NONSOLVENT
AbstractThe 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.
Language英语
WOS IDWOS:000186126100015
Citation statistics
Cited Times:152[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/138379
Collection中国科学院大连化学物理研究所
Affiliation1.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
GB/T 7714
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.
APA Liu, Y,Koops, GH,&Strathmann, H.(2003).Characterization of morphology controlled polyethersulfone hollow fiber membranes by the addition of polyethylene glycol to the dope and bore liquid solution.JOURNAL OF MEMBRANE SCIENCE,223(1-2),187-199.
MLA Liu, Y,et al."Characterization of morphology controlled polyethersulfone hollow fiber membranes by the addition of polyethylene glycol to the dope and bore liquid solution".JOURNAL OF MEMBRANE SCIENCE 223.1-2(2003):187-199.
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