Development of phosphonium-based bicarbonate anion exchange polymer membranes

作者：Ye Yuesheng; Stokes Kristoffer K; Beyer Frederick L; Elabd Yossef A^*

来源：Journal of Membrane Science, 2013, 443: 93-99.

DOI：10.1016/j.memsci.2013.04.053

• Ion exchange
• Phosphonium
• Bicarbonate
• Water purification
• Desalination

We report the preparation and characterization of phosphonium-based bicarbonate anion exchange random copolymers, poly(styrene-random-trimethylvinylbenzyl phosphonium bicarbonate) (poly(S-r-TMVBP-HCO3)). Compared to the chloride anion (Cl-) exchange membranes, these HCO3- exchange membranes exhibit similar hydration levels and only slightly lower ionic conductivities at similar ionic compositions. Other experiments reveal that the HCO3- exchange membranes are thermally stable (up to 110 degrees C) and chemically stable under relatively low alkaline conditions. Additionally, a detailed chemical degradation mechanism for these membranes under strong alkaline conditions is presented.

• 出版日期2013-9-15