High-performance membranes from polyimides with intrinsic microporosity

Bader S. Ghanem, Neil B. McKeown, Peter M. Budd, James D. Selbie, Detlev Fritsch

Research output: Contribution to journalArticlepeer-review

226 Scopus citations

Abstract

The synthesis of three high-performance polyimides membranes using a bis(carboxylic anhydride), derived from monomer with intrinsic microporosity, was described. The adsorption isotherms show high uptake at very low relative pressure, as is characteristic of a microporous material. It is noted that the rate of nitrogen uptake at 77K is slow for polymer materials such as that of PIM-PI-3. The solution-diffusion model of polymer membranes show that the selectivity may be expressed in terms of the solubility and diffusion coefficients for each components. The effect of the high solubility coefficients pf glassy polymers is to enhance gas permeability without loss of selectivity. The high solubility coefficients of polymers is attributed to a combination of microporous character, which enhances uptake.

Original languageEnglish (US)
Pages (from-to)2766-2771
Number of pages6
JournalAdvanced Materials
Volume20
Issue number14
DOIs
StatePublished - Jul 17 2008
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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