| Titre : | Thermally on−off switching membranes prepared by pore-filling poly(N-isopropylacrylamide) hydrogels (2010) |
| Auteurs : | Wang, Wencai, Auteur ; Tian, Xiaodong, Auteur ; Yiping Feng, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 49 N° 4, Fevrier 2010) |
| Article en page(s) : | pp 1684–1690 |
| Note générale : | Chimie industrielle |
| Langues : | Anglais |
| Tags : | 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 |
