Synthesis and gas separation performance of triblock copolymer ion gels with a polymerized ionic liquid mid-block

Yuanyan Gu, Timothy P. Lodge

Research output: Contribution to journalArticle

160 Scopus citations

Abstract

The gas separation properties of the corresponding ion gel formed by the self-assembly of PS-PIL-PS in the ionic liquid 1-ethyl-3-methylimidazolium bis (trifluoromethylsulfonyl)amide (EMIM) was reported. The polymer was synthesized through a two-step reversible addition-fragmentation chain transfer (RAFT) polymerization, followed by two functionalization steps to introduce ionic liquid functional groups. By using ion gel, the real selectivity of polymeric as separation membranes is found to be almost the same as the ideal selectivity. The performance of the PIL gel lies above the upper bound for CO 2/N2 and very close to the upper bound for CO 2/CH4. The ion gel is found to achieve a liquid-like permeability in a solid-state material, and by incorporating a PIL as the mid-block, the selectivity is increased.

Original languageEnglish (US)
Pages (from-to)1732-1736
Number of pages5
JournalMacromolecules
Volume44
Issue number7
DOIs
StatePublished - Apr 12 2011

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