Phase separation phenomena during the formation of asymmetric membranes

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Koenhen, D.M. and Mulder, M.H.V. and Smolders, C.A. (1977) Phase separation phenomena during the formation of asymmetric membranes. Journal of Applied Polymer Science, 21 (1). pp. 199-215. ISSN 0021-8995

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Abstract:The formation of membranes from two systems has been studied. In the system polyurethane-dimethylformamide-water, the mechanism for the formation of the sponge-like structure proves to be a liquid-liquid phase separation with nucleation and growth of the diluted phase. This mechanism has been confirmed for the system modified polystyrene-polyisoprene-polystyrene/o-dichlorobenzene/(methanol-water). Crystallization and gelation is discussed. The membranes prepared showed hyperfiltration activity. The mechanism proposed here is believed to be valid for other systems, too.
Item Type:Article
Copyright:© 1977 Wiley InterScience
Link to this item:http://purl.utwente.nl/publications/70801
Official URL:http://dx.doi.org/10.1002/app.1977.070210118
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