EFFECT OF THE CASTING SOLUTION COMPOSITION ON PORE SIZE AND PORE SIZE DISTRIBUTION OF RESULTING AROMATIC POLYAMIDE MEMBRANES
- 1 July 1987
- journal article
- research article
- Published by Taylor & Francis in Chemical Engineering Communications
- Vol. 57 (1-6) , 351-369
- https://doi.org/10.1080/00986448708960496
Abstract
The control of average pore size and pore size distribution on the surface of reverse osmosis (RO) membranes of aromatic polyamide (PA) material was studied by properly adjusting the composition of casting solutions which consisted of polymer—solvent, dimethylacetamide (DMA) —nonsolvent (swelling agent), calcium chloride. The average size and the distribution of the network and aggregate. pores were related to the size of the supermolecular polymer aggregates present in the casting solutions, which was changed by changing the concentration of polymer and nonsolvent/polymer ratio in the casting solutions. It has been found that the nonsolvent swelling agent additive plays a dual function of increasing the aggregate size and inducing the flux of gelation media into the film during the gelation step in the membrane making process.Keywords
This publication has 6 references indexed in Scilit:
- Viscoelastic and statistical thermodynamic approach to the study of the structure of polymer film casting solutions for making RO/UF membranesIndustrial & Engineering Chemistry Product Research and Development, 1985
- Predictability of performance of reverse osmosis membranes from data on surface force parametersIndustrial & Engineering Chemistry Process Design and Development, 1984
- Effect of shrinkage on pore size and pore size distribution of cellulose acetate reverse osmosis membranesIndustrial & Engineering Chemistry Product Research and Development, 1984
- Interfacial parameters governing reverse osmosis for different polymer material—solution systems through gas and liquid chromatography dataJournal of Colloid and Interface Science, 1983
- Interfacial forces, average pore size, and pore size distribution of ultrafiltration membranesIndustrial & Engineering Chemistry Product Research and Development, 1982
- Reverse osmosis transport through capillary pores under the influence of surface forcesIndustrial & Engineering Chemistry Process Design and Development, 1981