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题名: The coupling effect of the thermodynamic swelling process in pervaporation
作者: Ren, JZ;  Jiang, CZ
关键词: coupling effect ;  activity coefficient ;  chitosan membrane ;  H2SO4 crosslinking chitosan membrane ;  water-ethanol mixture
刊名: JOURNAL OF MEMBRANE SCIENCE
发表日期: 1998-03-18
卷: 140, 期:2, 页:221-233
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: In order to analyze the coupling effect in thermodynamic swelling process, the relationship between the activity and volume fraction of each component within membrane was defined as alpha(i)(m) = gamma(i)(m) phi(i)(m). The concept of reference state in thermodynamic swelling process which only considered the interaction between individual component and membrane matrix was also set up. The difference of activity coefficient of each component within the membrane from reference state reflected the contribution of coupling effect to thermodynamic swelling process. For chitosan and H2SO4 crosslinking chitosan membrane the influence of coupling effect on selectivity of H2O in thermodynamic swelling process could be described from distribution coefficients and competition distribution coefficients of H2O and EtOH successfully. The interaction between H2O and the membrane matrix dominated the activity coefficient of H2O within the membrane, and the coupling effect between H2O and EtOH within the membrane only had a little influence on the activity coefficient of H2O. However, the activity coefficient of EtOH was dominated strongly by the coupling effect between H2O and EtOH within the membrane. This was attributed to the large amount of H2O present in the membrane. The distribution coefficient of EtOH, k(2)(m) and competition distribution coefficient of membrane k(12)(m) directly determined the selectivity of H2O in thermodynamic swelling process and the coupling effect between H2O and EtOH within the membrane had a negative influence on the selectivity of H2O within the membrane. (C) 1998 Elsevier Science B.V.
关键词[WOS]: SEPARATION ;  MEMBRANE ;  MIXTURE ;  PERMSELECTIVITY ;  PERMEABILITY ;  POLYMER
语种: 英语
WOS记录号: WOS:000072451700007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138141
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:
Ren, JZ,Jiang, CZ. The coupling effect of the thermodynamic swelling process in pervaporation[J]. JOURNAL OF MEMBRANE SCIENCE,1998,140(2):221-233.
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