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题名: Influence of drying method on morphology and properties of asymmetric cellulose hollow fiber membrane
作者: Jie, XM;  Cao, YM;  Qin, JJ;  Liu, JH;  Yuan, Q
通讯作者: 介兴明
关键词: cellulose ;  hollow fiber membrane ;  solvent exchange ;  drying ;  hydrogen bond
刊名: JOURNAL OF MEMBRANE SCIENCE
发表日期: 2005-01-15
DOI: 10.1016/j.memsci.2004.08.007
卷: 246, 期:2, 页:157-165
收录类别: SCI
文章类型: Article
部门归属: 9
项目归属: 905
产权排名: 1;1
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: Using a dry/wet spinning process, asymmetric cellulose hollow fiber membranes (CHFM) were prepared from a dope composed of cellulose/N-methylmorpholine-N-oxide/water. The formation mechanism for the finger-like macrovoids at the inner portion of as-spun fibers was explained. Naturally drying and three solvent exchange drying methods were tried to investigate their influence on morphology and properties of CHFM. It was found that the ethanol-hexane exchange drying was an appropriate method to minimize morphology change of the as-spun CHFM, whereas the naturally drying caused the greatest shrinkage of the fibers that made the porous membrane become dense. The result, CHFM from ethanol-hexane exchange drying performed the highest gas permeation rate but gas permeation of the naturally dried membrane could not be detectable. The resultant CHFM from the ethanol-hexane exchange drying also showed acceptable, mechanical properties, thus it was proposed to be an appropriate method for gas separation purpose. The experimental results supported the proposed drying mechanism of CHFM. The free water would evaporate or be replaced by a solvent that subsequently would evaporate but the bonded water would remain in the membrane. What dominated the changes of membrane morphology during drying should be. the molecular affinities of cellulose-water, water-solvent and solvent-solvent. (C) 2004 Elsevier B.V. All rights reserved.
关键词[WOS]: METHYLMORPHOLINE-N-OXIDE ;  ACETATE MEMBRANES ;  ORGANIC-SOLVENTS ;  GAS PERMEATION ;  SEPARATION ;  PERVAPORATION ;  HEMODIALYSIS ;  ACETYLATION ;  PERFORMANCE ;  MIXTURES
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000226346100005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/81481
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, Lab Environm Engn, Dalian 116023, Peoples R China
2.Nanyang Technol Univ, Innovat Ctr, Environm Technol Inst, Singapore 637723, Singapore

Recommended Citation:
Jie, XM,Cao, YM,Qin, JJ,et al. Influence of drying method on morphology and properties of asymmetric cellulose hollow fiber membrane[J]. JOURNAL OF MEMBRANE SCIENCE,2005,246(2):157-165.
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