Note on the paper “On the comparison of reverse osmosis membrane performance”(1)
✍ Scribed by Petr Deimek
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 76 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0011-9164
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Thin-film composite reverse osmosis membranes of polyamides were prepared by interfacial polymerization. Various benzenediamines and poly(aminostyrene) were interfacially reacted with various acyl chlorides to prepare a skin layer of composite membranes. Among the membranes prepared from the structu
Greek symbols p -Membrane performance parameter y -Proportionality constant a(x) -Osmotic pressure ,9 -Circumferential coordinate around membrane
A two-stage method of making semi-permeable high flux reverse osmosis membranes was developed using water-ethanol mixtures to precipitate the cellulose acetate. This eliminated the need for heat treatment and produced membranes with fluxes up to 5 m'/m2 day and sodium chloride rejections up to 85 %
Several sets of porous cellulose acetate membranes were made using the same casting solution composition and gelation conditions but varying the casting solution temperature and solvent evaporation conditions. The films were tested in reverse osmosis experiments at 250 psig using aqueous feed soluti