The Properties of Water in Polymeric Membranes.
Abstract
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1973
- Accession Number
- AD0768918
Entities
People
- G. Herscovici
- M. A. Frommer
- M. Shporer