Tailoring physical aging in super glassy polymers with functionalized porous aromatic frameworks for CO2 capture

Cher Hon Lau, Kristina Konstas, Cara M. Doherty, Shinji Kanehashi, Berkay Ozcelik, Sandra Kentish, Anita J. Hill, Matthew R. Hill

Research output: Contribution to journalArticleResearchpeer-review

64 Citations (Scopus)

Abstract

A series of chemically functionalized porous aromatic frameworks (PAFs) have been synthesized and deployed within mixed-matrix membranes for gas separation. This series of PAFs delivered for the first time simultaneous control of selective gas transport and physical aging within the membranes. New composites including native and metalated fullerenes were also prepared, and the composites exhibited exceptional increases in their porosity, which in turn resulted in ultrafast gas transport. CO2 permeability following PAF-1-Li6C60 infusion within poly(trimethylsilylpropyne) was as high as 50 600 Barrer, a 70 improvement. Remarkably, just 9 of this permeation rate diminished after 1 year of physical aging, compared to 74 in the native polymer. A series of characterization techniques revealed this phenomenon to be due to intercalation of polymer chains within the PAF pores, the strength of which is controlled by the levels of chemical functionalization and porosity. The membranes were exploited for gas separations, in particular the stripping of CO2 from natural gas. (Graph Presented).
Original languageEnglish
Pages (from-to)4756-4762
Number of pages7
JournalChemistry of Materials
Volume27
Issue number13
DOIs
Publication statusPublished - 14 Jul 2015
Externally publishedYes

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