Thermodynamic and mechanistic characterization of water sorption in homogeneous and asymmetric cellulose acetate membranes
β Scribed by H. G. Burghoff; W. Pusch
- Publisher
- John Wiley and Sons
- Year
- 1976
- Tongue
- English
- Weight
- 514 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0021-8995
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π SIMILAR VOLUMES
## Abstract Differential scanning calorimetric melting endotherms of wet and halfβdried cellulose acetate membranes and salt distribution coefficients were studied to clarify the states of water in membranes. We have suggested that (a) there are four states of water in cellulose acetate membranes;
The sorption characteristics of water, methanol and ethanol vapours in cellulose acetate (CA) Γlms were measured by microgravimetry. The sorption isotherms for water vapours in the CA Γlm at di β erent temperatures in the range 20Γ40Β‘C do not obey the Flory equation over the whole water activity rang
The pervaporation of pure water through homogeneous aromatic polyamide membranes was investigated. The structure of the prepared membranes was controlled by varying the solvent evaporation times before the gelation step from 5 min to 240 min. The permeation flux of pure water decreased rapidly when