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Thermally on−off switching membranes prepared by pore-filling poly(N-isopropylacrylamide) hydrogels / Wang, Wencai in Industrial & engineering chemistry research, Vol. 49 N° 4 (Fevrier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1684–1690 Titre : Thermally on−off switching membranes prepared by pore-filling poly(N-isopropylacrylamide) hydrogels Type de document : texte imprimé Auteurs : Wang, Wencai, Auteur ; Tian, Xiaodong, Auteur ; Yiping Feng, Auteur Année de publication : 2010 Article en page(s) : pp 1684–1690 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Polymer  hydrogels  Switching  membranes. Résumé : Pore-filling N-isopropylacrylamide (NIPAAM) polymer hydrogels were successfully grafted onto track-etched polycarbonate (PC) membranes by plasma-induced graft copolymerization. The microstructure and morphology of the PC-g-PNIPAAM membranes were investigated by XPS, SEM, ATR-FTIR, TGA, and water flux experiments. The effective pore sizes were regulated by the volume change of the cross-linked PNIPAAM hydrogels in the temperature range around its lower critical solution temperature (LCST). The PC-g-PNIPAAM membranes demonstrated a fast and reversible valve switching mechanism in a small temperature range. The on−off water flux ratio became more significant with the increase of the monomer concentration. Contact angle results showed that the thermal-responsive gating characteristics of PC-g-PNIPAAM membranes were mainly dependent on the pore size change DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9008666 [article] Thermally on−off switching membranes prepared by pore-filling poly(N-isopropylacrylamide) hydrogels [texte imprimé] / Wang, Wencai, Auteur ; Tian, Xiaodong, Auteur ; Yiping Feng, Auteur . - 2010 . - pp 1684–1690. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1684–1690 Mots-clés : Polymer  hydrogels  Switching  membranes. Résumé : Pore-filling N-isopropylacrylamide (NIPAAM) polymer hydrogels were successfully grafted onto track-etched polycarbonate (PC) membranes by plasma-induced graft copolymerization. The microstructure and morphology of the PC-g-PNIPAAM membranes were investigated by XPS, SEM, ATR-FTIR, TGA, and water flux experiments. The effective pore sizes were regulated by the volume change of the cross-linked PNIPAAM hydrogels in the temperature range around its lower critical solution temperature (LCST). The PC-g-PNIPAAM membranes demonstrated a fast and reversible valve switching mechanism in a small temperature range. The on−off water flux ratio became more significant with the increase of the monomer concentration. Contact angle results showed that the thermal-responsive gating characteristics of PC-g-PNIPAAM membranes were mainly dependent on the pore size change DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9008666