Pore size control of carbonized BPDA-pp'ODA polyimide membrane by chemical vapor deposition of carbon

Jun Ichiro Hayashi, Hirotaka Mizuta, Masatake Yamamoto, Katsuki Kusakabe, Shigeharu Morooka

Research output: Contribution to journalArticlepeer-review

125 Citations (Scopus)

Abstract

A BPDA-pp'ODA polyimide film was formed on the outer surface of a porous alumina support tube (outside diameter = 2.4 mm), and it was carbonized at an optimized temperature, 700°C. The membrane obtained showed a permeance of 3 x 10-9 mol·m-2·s-1·Pa-1 for O2 and 2 x 10-8 mol·m-2·s-1·Pa-1 for CO2 and a permselectivity of 10 for O2/N2 and 47 for CO2/N2 at 35°C. The membrane was then modified with carbon deposits formed by pyrolysis of propylene at 650°C. The permselectivities for O2/N2 and CO2/N2 at 35°C were increased to 14 and 73, respectively. Coexisting water vapor decreased permeances of O2 and N2 but did not change the O2/N2 permselectivity.

Original languageEnglish
Pages (from-to)243-251
Number of pages9
JournalJournal of Membrane Science
Volume124
Issue number2
DOIs
Publication statusPublished - Feb 19 1997

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

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