Correlations between types of absorbed water molecules and water permeability in swollen polymer membranes
作者:
Y. J. Chang,
C. T. Chen,
A. V. Tobolsky,
期刊:
Journal of Polymer Science: Polymer Physics Edition
(WILEY Available online 1974)
卷期:
Volume 12,
issue 1
页码: 1-6
ISSN:0098-1273
年代: 1974
DOI:10.1002/pol.1974.180120101
出版商: John Wiley&Sons, Inc.
数据来源: WILEY
摘要:
AbstractA series of poly(vinyl formal) membranes was synthesized by formalization of poly(vinyl alcohol) membranes. Representative pieces were selected for this study. Some cellulose acetate membranes cast from dioxane were used for comparison. The main experimental techniques employed included water absorption measurements and direct osmosis measurements. Aqueous solutions of sodium chloride at various concentrations were used for the studies of permeation through the membranes by direct osmosis.The plot of water permeability coefficientPwversus volume fractionVwof water absorbed in a membrane was interpreted in terms of the effect of two different types of absorbed water molecules. The individual diffusion coefficients were evaluated from asymptotic slopes of the curves. Similar analyses applied satisfactorily to data found in the literature.
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