Regular copolyamides. IV. Characterization of membrane morphology
- Creators
-
Tirrell, D.
- Vogl, O.
Abstract
Asymmetric copolyoxamide films prepared via a solution-casting/gelation process have been characterized by scanning electron microscopy, small-angle light scattering, and measurements of surface area and hydrophilicity. The polymer selected for study is a regular copolyamide prepared from N,N-bis(2-aminoethyl) oxamide and isophthaloyl chloride, and shows promise as a membrane material for desalination by reverse osmosis. Scanning electron microscopy reveals a unique capillary structure in films cast from N,N-dimethylacetamide-LiCl mixtures, plus a variety of structures in trifluoroacetic acid-cast membranes. Light-scattering experiments on water-swollen films have substantiated microscopic observations of desiccated samples; the gel structures of the copolyoxamide films do not appear to suffer severe collapse on dehydration. Measurements of surface area and water sorption have been conducted in an attempt to assess membrane-water interaction.
Additional Information
© 1977 John Wiley & Sons. Received July 13, 1976; Revised September 2, 1976. The authors wish to thank Dr. Richard S. Stein for fruitful discussions concerning techniques and interpretation of small-angle light scattering experiments. Appreciation is extended to Dr. D. Peiffer and Mr. T. Russell for assistance in light scattering experiments, to Mr. P. Gilmore for some initial electron microscopy, and to Dr. J. Hsieh for surface area determinations. This work was supported by the Office of Saline Water under Research Grant No. DI OSW 14 30 3146. Paper presented in part at the Eighteenth Canadian High Polymer Forum. Hamilton, Ontario, August, 1975. For Part III, see Stevenson et al.Additional details
- Eprint ID
- 55063
- Resolver ID
- CaltechAUTHORS:TIRjpspce1977
- DI OSW 14 30 3146
- Department of the Interior
- Created
-
2015-02-23Created from EPrint's datestamp field
- Updated
-
2021-11-10Created from EPrint's last_modified field