Phase separation phenomena during the formation of asymmetric membranes
Autor: | M.H.V. Mulder, D.M. Koenhen, C.A. Smolders |
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Přispěvatelé: | University of Twente |
Rok vydání: | 1977 |
Předmět: | |
Zdroj: | Journal of applied polymer science, 21(1), 199-215. Wiley |
ISSN: | 1097-4628 0021-8995 |
Popis: | 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. |
Databáze: | OpenAIRE |
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