KIM, HJ JO, WH KANG, YS 2024-01-21T20:38:22Z 2024-01-21T20:38:22Z 2022-01-11 1995-07-05 0021-8995 https://pubs.kist.re.kr/handle/201004/145043 The free-volume model for pervaporation has been modified by considering the polar path, in order to apply the model to membranes containing hydrophilic groups. The free-volume parameters were determined by inverse gas chromatography. For the polyacrylonitrile (PAN) membrane, the transport mechanism could be analyzed only by the free-volume model; however, for a membrane containing a hydrophilic moiety, the transport properties could be interpreted by the modified model. In water/ethanol mixtures, ethanol transports through the membrane matrix, while water permeates through the polar pathways consisting of polar groups or ions and water molecules as well as through the membrane matrix. (C) 1995 John Wiley and Sons, Inc. English JOHN WILEY & SONS INC ETHANOL WATER MIXTURES SEPARATION COEFFICIENTS DIFFUSION LIQUIDS MODIFIED FREE-VOLUME MODEL FOR PERVAPORATION OF WATER/ETHANOL MIXTURES THROUGH MEMBRANES CONTAINING HYDROPHILIC GROUPS OR IONS Article 10.1002/app.1995.070570107 1 JOURNAL OF APPLIED POLYMER SCIENCE, v.57, no.1, pp.63 - 76 JOURNAL OF APPLIED POLYMER SCIENCE 57 1 63 76 scie scopus A1995RC73400007 2-s2.0-0029636785 Polymer Science Polymer Science Article ETHANOL WATER MIXTURES SEPARATION COEFFICIENTS DIFFUSION LIQUIDS