Preparation of reverse osmosis membranes by surface modification of polymeric films. I. Surface acetylation of cellulose
Article first published online: 9 MAR 2003
Copyright © 1975 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 19, Issue 6, pages 1685–1694, June 1975
How to Cite
Hillman, J. J. (1975), Preparation of reverse osmosis membranes by surface modification of polymeric films. I. Surface acetylation of cellulose. J. Appl. Polym. Sci., 19: 1685–1694. doi: 10.1002/app.1975.070190619
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Revised: 17 DEC 1974
- Manuscript Received: 29 JUL 1974
Surface acetylation of cellophane to afford an asymmetric membrane having high desalination ability (as high as 98% sodium chloride rejection) is described. The films were characterized by multiple-internal-reflectance microscopy (MIR), dyeing tests, light microscopy, and determination of water and sodium chloride transport properties in reverse osmosis cells. Surface modification employing acetyl chloride and acetic anhydride was studied in detail: the influence of the cellophane employed, the degree of cellophane activation, reaction time, reagent concentration, and diluent were assessed. Mixed acetylation reactions are also discussed as well as an evaluation of various postconditioning treatments used to increase desalination.