The Properties of Water in Polymeric Membranes.
Final technical rept. 15 Aug 69-14 Aug 73,
HYDRONAUTICS INC LAUREL MD
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The properties of water in various cellulose acetate CA membranes have been investigated by magnetic resonance techniques. The data suggest existence in the CA membrane, of two types of water a small fraction of highly immobilized bound water and the remaining large fraction of free water. The NMR spectra of water adsorbed at various relative humidities on various cellulose ester membranes also have been studied. Membranes of cellulose acetate, triacetate and acetate-butyrate were investigated. The data suggest that the dependence of the position of the resonance peak on the position of the membrane plane with respect to the external magnetic field, is a geometrical phenomenon due to the magnetic bulk susceptibility of the medium. Modified author abstract
- Physical Chemistry