Facilitated oxygen transport in a novel silicone polymer membrane containing carboxylic cobalt groups

✍ Scribed by Zi-Yong Zhang

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 109 KB
• Volume: 90
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.12754

✦ Synopsis

Abstract

A novel silicone polymer membrane with facilitated oxygen transport properties was prepared by using 11‐alkene acid cobalt, a silicone rubber containing vinyl groups of 5 mol %, a hydrogen‐containing silicon oil, and chlorine platinum acid. The solution casting and the vulcanization were carried out simultaneously at room temperature. Investigation showed that PO~2~ increased and PN~2~ did not change with decreasing gas pressure difference. This facilitated oxygen transport behavior was contributed by a polymeric cobalt complex formed from carboxylic groups and cobaltous ions in the membrane to result in the simultaneous increase of both PO~2~ and α__O__~2~/N~2~ under lower gas pressure difference. For example, the PO~2~ and α__O__~2/~N~2~ of the membrane containing 11‐alkene acid cobalt of 2.5 wt% were 750 Barrer and 3.09 under a gas pressure difference of 0.05 mPa. As much as 5 wt% 11‐alkene acid cobalt could be added to the membranes; PO~2~ and α__O__~2/~N~2~ increased to 802 Barrer and 3.34 respectively when the membrane contained 11‐alkene acid cobalt of 5 wt %. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 1038–1044, 2003