The Pervaporation of Ethanol/Water Feeds with Polyaniline Membranes and Blends
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- 作者：Ball ; Ian J. ; Huang ; Shu-Chuan ; Miller ; Kimberly J. ; Wolf ; Robert A. ; Shimano ; James Y. ; Kaner ; Richard B.
- 关键词：Polyaniline and derivatives ; Solid/liquid interfaces ; Solid/gas interfaces
- 刊名：Synthetic Metals
- 出版年：1999
- 出版时间：June, 1999
- 年：1999
- 卷：102
- 期：1-3
- 页码：1311-1312
- 全文大小：153 K
文摘
Pervaporation experiments with ethanol/water feeds and polyaniline membranes have been performed. Undoped polyaniline is shown to be highly selective for water over ethanol, leading to selectivities (α) > 1,000, although permeation fluxes are low. The mechanism of permselectivity in undoped polyaniline is shown to be controlled by the high diffusivity selectivity for water. Hydrochloric acid-doped polyaniline membranes suffer from the effect of HCl-dopants leaching from the membrane into the feed. The use of polymeric dopants, such as polyamic acid and polyacrylic acid, eliminates this problem, and leads to improvements in properties compared to HCl-doped polyaniline.