Semipermeable membranes of cellulose acetate for desalination in the process of reverse osmosis. III. Bound water relationships
- 1 July 1965
- journal article
- research article
- Published by Wiley in Journal of Applied Polymer Science
- Vol. 9 (7) , 2363-2378
- https://doi.org/10.1002/app.1965.070090704
Abstract
The mechanism by which water and dissolved salts permeate selectively through membranes has been investigated. It has been demonstrated that the predominant mechanism of permeation involves the interaction of the various species with specific sites and their associated bound water molecules. The extent of the bound water held by the cellulosic membranes of interest has been determined. Correlation has been found between the permeation characteristics demonstrated by membranes at various steps in their preparation and its bound water content. The mechanism of rejection of salts has been shown to be related to the relative inability of their ions to become solvated by bound water. A model has been hypothesized which correctly describes the behavior of the desalination membrane with reference to water and soluble inorganic salts.Keywords
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