Preparation and characterization of silica-polyimide composite membranes coated on porous tubes for CO2 separation

Katsuki Kusakabe, Kiyotaka Ichiki, Hayashi Jun-Ichiro, Hideaki Maeda, Shigeharu Morooka

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

Silica-polyimide microcomposite membranes were prepared on γ-alumina-coated α-alumina support tubes, and their gas permeation properties were evaluated with He, N2 and CO2. Smoothing of the substrate surface and hybridization of silica and polyamic acid were both effective to form defect-free thin composite membranes. The CO2 permeance of a membrane with a silica content of 68 wt% was one order of magnitude higher than that of a polyimide membrane having the same thickness. The permselectivity of CO2 to N2, was 30 at 30°C and 13 at 100°C. Contributions of the silica and polyimide phases to permeance of the composite membrane were analyzed with a two-phase permeation model. The effective thickness of the rate-controlling polyimide phase was less than one-tenth of the total thickness of the silica-polyimide membrane.

Original languageEnglish
Pages (from-to)65-75
Number of pages11
JournalJournal of Membrane Science
Volume115
Issue number1
DOIs
Publication statusPublished - Jun 26 1996

Fingerprint

Composite membranes
polyimides
Polyimides
Silicon Dioxide
Silica
tubes
silicon dioxide
membranes
preparation
composite materials
Membranes
Aluminum Oxide
Permeation
Alumina
aluminum oxides
smoothing
Gases
Defects
Acids
Substrates

All Science Journal Classification (ASJC) codes

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

Cite this

Preparation and characterization of silica-polyimide composite membranes coated on porous tubes for CO2 separation. / Kusakabe, Katsuki; Ichiki, Kiyotaka; Jun-Ichiro, Hayashi; Maeda, Hideaki; Morooka, Shigeharu.

In: Journal of Membrane Science, Vol. 115, No. 1, 26.06.1996, p. 65-75.

Research output: Contribution to journalArticle

Kusakabe, Katsuki ; Ichiki, Kiyotaka ; Jun-Ichiro, Hayashi ; Maeda, Hideaki ; Morooka, Shigeharu. / Preparation and characterization of silica-polyimide composite membranes coated on porous tubes for CO2 separation. In: Journal of Membrane Science. 1996 ; Vol. 115, No. 1. pp. 65-75.
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