A light-scattering and membrane formation study on concentrated cellulose acetate solutions
Article first published online: 9 MAR 2003
Copyright © 1976 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 20, Issue 5, pages 1339–1353, May 1976
How to Cite
Kunst, B., Škevin, Đ., Deželić, Gj. and Pétres, J. J. (1976), A light-scattering and membrane formation study on concentrated cellulose acetate solutions. J. Appl. Polym. Sci., 20: 1339–1353. doi: 10.1002/app.1976.070200517
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Received: 14 JUL 1975
An improved explanation of the mechanism of the porous membrane formation with asymmetric structure has been proposed. It emerged from the correlation of the results obtained by the light-scattering measurements of the ternary membrane casting solutions and by the reverse osmosis and ultrafiltration testing of the asymmetric membranes prepared from these solutions. The results of anisotropic light-scattering measurements indicated the extent of supermolecular structurization of the casting solution which affected the porous structure formation in the membrane surface region. The variation of the casting solution composition and, particularly, the role of the CA/F ratio, the formamide content, and their influence on the asymmetric membrane properties were investigated and explained using the improved concept of the membrane-making mechanism.