An Efficient Polymer Molecular Sieve for Membrane Gas Separations

DOI Web Site 23 Citations
  • Mariolino Carta
    School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK.
  • Richard Malpass-Evans
    School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK.
  • Matthew Croad
    School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK.
  • Yulia Rogan
    School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK.
  • Johannes C. Jansen
    Institute on Membrane Technology, Consiglio Nazionale delle Ricerche, ITM-CNR, c/o University of Calabria, Via P. Bucci 17/C, 87030 Rende (CS), Italy.
  • Paola Bernardo
    Institute on Membrane Technology, Consiglio Nazionale delle Ricerche, ITM-CNR, c/o University of Calabria, Via P. Bucci 17/C, 87030 Rende (CS), Italy.
  • Fabio Bazzarelli
    Institute on Membrane Technology, Consiglio Nazionale delle Ricerche, ITM-CNR, c/o University of Calabria, Via P. Bucci 17/C, 87030 Rende (CS), Italy.
  • Neil B. McKeown
    School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK.

Description

<jats:title>Bicyclic Bridge to Improvement</jats:title> <jats:p> Polymers of intrinsic microporosity are a recently developed class of contorted rigid glassy ladderlike polymers having very high free volume (open internal spaces). The intrinsic porosity of these materials has made them of interest for ultrahigh permeability gas separation membranes. However, while the polymers show good gas permeability, they have only moderate gas selectivity. <jats:bold> Carta <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6117" page="303" related-article-type="in-this-issue" vol="339" xlink:href="10.1126/science.1228032">303</jats:related-article> ; see the Perspective by <jats:bold>Guiver and Lee</jats:bold> ) hypothesized that if they could replace the dioxin-like rings in their polymers with stiffer bridged bicyclic rings, they could improve the membrane properties of the polymer. By exploiting reactions connected to the formation of Tröger's base to form the multiple covalent bonds needed to make the bicyclic rings, the resulting polymers showed significantly improved selectivity and permeability. </jats:p>

Journal

  • Science

    Science 339 (6117), 303-307, 2013-01-18

    American Association for the Advancement of Science (AAAS)

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