Several p-(1H,1H,2H,2H-perfluoroalkyloxydimethylsilyl)styrenes having perfluoroalkyl groups with different chain lengths were synthesized and polymerized. The polydimethylsiloxane-based blend membranes which contained a very small amount (1.0 wt%) of polyrp-(1H,1H,2H,2H-perfluoroalkyloxydimethylsilyl) styrene] had good ethanol permselectivity. All of their separation factors (~t Et°H) and permeation rates (P) were higher than those of polydimethylsiloxane. In particular, poly[p-(1H,1H,2H,2Hperfluorohexyloxydimethylsilyl) styrene] showed the best performance (ctEtOH=22.3, P=2.06 x 10 -2 g m m- 2 h- 1 ). This was attributed to the characteristics of the fluorine-containing polymers which were accumulated at the membrane surface.
Посилання на статтю:
Poly[p- (1 H,1 H,2H,2H-perfluoroalkyloxydimethylsilyl ) styrenes] as materials for ethanol-permselective membranes / Toshiki Aoki*, Yasuo Toyoshima, Tomoko Yoshizawa and Eizo Oikawa // Polymer. – 1992. – Vol 33. – P. 662-664.