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Asymmetric membranes prepared by immersion-precipitation technique

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: G.Nechifor, G.Popescu

Editorial: Revue Roumaine de Chimie, 35(7-9), p.899-908, 1990.


The results of study onthe obtention of asymmetric membranes by phase inversion method are presented: the study has evidenced the generality of coagulation pathway theory developed by the Dutch membrane school. Simple structures were obtained by changing either the solvent or coagulant in the polymer-solvent-nonsolvent system. In this study use has been made of polysulfone as reference polymer, dipolar aprotic solvent (DMF, NMP, DMAc, Chloroform, cyclohaxanane) and lower aliphatic alcohols (C1-C4) as nonsolvents. The structures of membranes were determinated by scanning electron microscopy

Cuvinte cheie: asymmetric membranes, immersion-precipitation technique, phase inversion method