372726 Metal-Organic Framework Threaded with Aminated Polymer for Fast Anion Exchange

Tuesday, November 18, 2014: 12:30 PM
409 (Hilton Atlanta)
Liang Gao1, Kwong-Yu Chan2 and Chi-Ying Vanessa Li2, (1)Chemistry, The University of Hong Kong, Hong Kong, Hong Kong, (2)Department of Chemistry, The University of Hong Kong, Pokfulam, Hong Kong

We introduce a new approach to synthesize an effective anion exchange material by impregnating a metal organic framework (MOF) with monomers, followed by their in situ polymerization and amination.  The MOF composite threaded with flexible anion-exchange polymers in the host cavities demonstrates very fast and reversible ion-exchange activity. We illustrate the approach with polyvinyl benzyl trimethyl ammonium hydroxide (PVBTAH) caged in ZIF-8. It is synthesized in steps of chloro-monomer impregnation, in situ polymerization, amination, and alkaline ion-exchange. The synthesized PVBTAH polymer within ZIF-8 is not cross-linked and exhibits superior ion-exchange kinetics compared to a conventional ion-exchange resin, Amberlyst A26. This PVBTAH~ZIF-8 is robust and better thermal stability than Amberlyst A26. There is great potential to create an effective anion exchange membrane from this new ionomer.

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