Pervaporation Properties of Dense Polyamide-6 Membranes in Separation of Water-Ethanol Mixtures
- 1 April 1996
- journal article
- research article
- Published by Taylor & Francis in Separation Science and Technology
- Vol. 31 (7) , 953-963
Abstract
Several dense polyamide-6 membranes were prepared by casting 7 wt% and/or 10 wt% solutions of polymer in trifluoroethanol. The cast membranes were dried at different temperatures from 25 to 80°C. Sorption and pervaporation properties of PA-6 membranes in water-ethanol mixtures were obtained. The data obtained showed that water was preferentially sorbed into the membrane and transported through the membrane; however, the pervaporation selectivity factor αPV was close to unity at higher concentrations. The selectivity parameters in pervaporation were improved for membranes obtained from 10 wt% polymer and dried at higher temperatures.Keywords
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