Highly Permeable Benzotriptycene-Based Polymer of Intrinsic Microporosity

Ian Rose, Mariolino Carta, Richard Malpass-Evans, Maria-Chiara Ferrari, Paola Bernardo, Gabriele Clarizia, Johannes C. Jansen, Neil B. McKeown*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A novel polymer of intrinsic microporosity (PIM) was prepared from a diaminobenzotriptycene monomer using a polymerization reaction based on Troger's base formation. The polymer (PIM-BTrip-TB) demonstrated an apparent Brunauer, Emmet, and Teller (BET) surface area of 870 m(2) g(-1), good solubility in chloroform, excellent molecular mass, high inherent viscosity and provided robust thin films for gas permeability measurements. The polymer is highly permeable (e.g., PH2 = 9980; PO2 = 3290 Barrer) with moderate selectivity (e.g., PH2/PN2 = 11.0; PO2/PN2 = 3.6) so that its data lie over the 2008 Robeson upper bounds for the H-2/N-2, O-2/N-2, and H-2/CH4 gas pairs and on the upper bound for CO2/CH4. On aging, the polymer demonstrates a drop in permeability, which is typical for ultrapermeable polymers, but with a significant increase in gas selectivities (e.g., PO2 = 1170 Barrer; PO2/PN2 = 5.4).

Original languageEnglish
Pages (from-to)912-915
Number of pages4
JournalACS MACRO LETTERS
Volume4
Issue number9
DOIs
Publication statusPublished - Sep 2015

Keywords

  • GAS SEPARATION MEMBRANES
  • POLYIMIDE MEMBRANES
  • TROGERS BASE
  • CO2 CAPTURE
  • TRIPTYCENE
  • ENHANCEMENT
  • PERFORMANCE
  • PERMEATION

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