Synthesis and effect of physical aging on gas transport properties of a microporous polyimide derived from a novel spirobifluorene-based dianhydride

Xiaohua Ma, Bader Ghanem, Octavio Salinas, Eric Litwiller, Ingo Pinnau

Research output: Contribution to journalArticlepeer-review

72 Scopus citations

Abstract

A novel generic method is reported for the synthesis of a spirobifluorene-based dianhydride (SBFDA). An intrinsically microporous polyimide was obtained by polycondensation reaction with 3,3′-dimethylnaphthidine (DMN). The corresponding polymer (SBFDA-DMN) exhibited good solubility, excellent thermal stability, as well as significant microporosity with high BET surface area of 686 m2/g. The O2 permeability of a methanol-treated and air-dried membrane was 1193 Barrer with a moderate O2/N2 selectivity of 3.2. The post-treatment history and aging conditions had great effects on the membrane performance. A significant drop in permeability coupled with an increase in selectivity was observed after long-term aging. After storage of 200 days, the gas separation properties of SBFDA-DMN were located slightly above the latest Robeson upper bounds for several gas pairs such as O2/N2 and H2/N2.
Original languageEnglish (US)
Pages (from-to)231-235
Number of pages5
JournalACS Macro Letters
Volume4
Issue number2
DOIs
StatePublished - Jan 29 2015

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics

Fingerprint

Dive into the research topics of 'Synthesis and effect of physical aging on gas transport properties of a microporous polyimide derived from a novel spirobifluorene-based dianhydride'. Together they form a unique fingerprint.

Cite this