Mechanically robust thermally rearranged (TR) polymer membranes with spirobisindane for gas separation

Shenghai Li, Hye Jin Jo, Sang Hoon Han, Chi Hoon Park, Seungju Kim, Peter M. Budd, Young Moo Lee

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Novel spirobisindane-containing thermally rearranged (TR) benzoxazole(spiroTR-PBO) membranes were prepared by thermal treatment of four newly synthesized spirobisindane-containing hydroxyl-polyimides (spiroHPIs). Transport properties of spirobisindane-containing polymers were investigated along with fractional free volume and density measurements, as well as molecular simulation analysis. The resulting spiroTR-PBOs exhibited high free volumes and superior mechanical properties in terms of elongation and tensile strength, and these findings were supported by molecular dynamic simulations. SpiroTR-PBO membranes containing hexafluoroisopropylidene moiety in the polymer backbone showed a six-fold increase in CO2 permeability, compared to that of the spiroHPI precursor. SpiroTR-PBO membranes showed strong potential to be applied in carbon capture and separation of gases because of their high gas permeability coupled with robust mechanical properties. © 2013 Elsevier B.V.
    Original languageEnglish
    Pages (from-to)137-147
    Number of pages10
    JournalJournal of Membrane Science
    Volume434
    DOIs
    Publication statusPublished - 1 May 2013

    Keywords

    • CCS
    • CO2 separation
    • High fractional free volume
    • Polymer membrane
    • Thermally rearranged membrane

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