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Polyelectrolyte complex membranes – surface and permeability properties
Author(s) -
Lukáš J.,
Schwarz H.H.,
Richau K.
Publication year - 2002
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200211)188:1<155::aid-masy155>3.0.co;2-l
Subject(s) - membrane , pervaporation , contact angle , wetting , chemical engineering , ammonium chloride , polyelectrolyte , pulmonary surfactant , vinyl alcohol , chemistry , cationic polymerization , dehydration , polymer chemistry , materials science , chromatography , permeation , organic chemistry , polymer , biochemistry , engineering
In order to study, how the membrane hydrophilicity influences the pervaporation (PV) separation properties in dehydration of alcohols, two polyelectrolyte complex (PELC) membranes, based on interfacial reaction of polyanionic sodium salt of sulfoethyl cellulose (SEC) with polycationic poly[dimethyl(diallyl)ammonium chloride] (pDMDAAC), or cationic surfactant benzyl(dodecyl)dimethylammonium chloride (BDDDMAC), were prepared and tested. Contact angle measurements on membrane surfaces made in various media showed that the membrane hydrophilicity, in the sense of water wettability, had not influence neither to flux nor selectivity in the PV dehydration process. On the contrary, the membrane wettability determined by contact angle measurements in the real water/alcohol separation mixture, correlated very well with the PV experiments. These findings are confronted with the solution‐diffusion PV model.