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Removal of trace VOCs from water through PDMS membranes and analysis of their permeation behaviors
Author(s) -
Yeom C. K.,
Kim H. K.,
Rhim J. W.
Publication year - 1999
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19990725)73:4<601::aid-app16>3.0.co;2-#
Subject(s) - permeation , membrane , trace (psycholinguistics) , chemical engineering , materials science , polymeric membrane , chemistry , environmental chemistry , philosophy , linguistics , biochemistry , engineering
The removal of trace chlorinated hydrocarbons from water has been performed through poly(dimethylsiloxane), which had been fabricated by addition crosslinking reaction. The membrane had a more hydrophobic characteristic than that fabricated by a condensation reaction because it has no polar groups in the polymeric chain, such as hydroxyl and chlorine groups. This study concentrated on the comparison of the permeation behaviors of homologous series of chloromethanes aqueous solutions with that of a chloroethane solution. It was suggested that when the hydrophobic characteristics of a membrane system is greater, water molecules in the membrane tend to exist in the form of clusters; thereby, the permeating size of water component increases, resulting in suppressing water permeation and increasing the enrichment factor for the organic component. The permeation behaviors at various temperatures and membrane thicknesses were indirectly interpreted in terms of the effect of concentration polarization and the effect of interactions of organic–membrane, and water–organic‐absorbing membrane. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 601–611, 1999