Acrylamide plasma-induced polymerization onto expanded poly(tetrafluoroethylene) membrane for aqueous alcohol mixture vapor permeation separation

详细信息    查看全文

• 作者：Tu ; Chen-Yuan ; Chen ; Chiu-Ping ; Wang ; Yi-Chieh ; Li ; Chi-Lan ; Tsai ; Hui-An ; Lee ; Kueir-Rarn ; Lai ; Juin-Yih
• 关键词：Plasma ; Expanded poly(tetrafluoroethylene) ; Post-graft polymerization ; Vapor permeation
• 刊名：European Polymer Journal
• 出版年：2004
• 出版时间：July, 2004
• 年：2004
• 卷：40
• 期：7
• 页码：1541-1549
• 全文大小：589 K

文摘

To improve the vapor permeation performance of aqueous alcohol mixtures, acrylamide (AAm) plasma activation then post-graft polymerization onto an expanded poly(tetrafluoroethylene) (e-PTFE) membrane, e-PTFE-g-AAm, was synthesized in this study. The surface properties of the e-PTFE-g-AAm membrane were characterized using ATR/FTIR, SEM, AFM and the water surface contact angle. The degree of grafting increases with increasing polymerization temperature. A maximum value was obtained at 80 °C. The water contact angle of the pristine e-PTFE membrane and the e-PTFE-g-AAm membrane with a 21 % grafting degree was 109.7° and 34.1°, respectively. Optimum vapor permeation performance was obtained using an e-PTFE-g-AAm membrane with a 21 % grafting degree for a 90 wt. % aqueous ethanol solution, giving a permeate water concentration of 99.4 % and a permeation rate of 648 g/m²h.