TY - JOUR
T1 - Preparation and characterization of silica-polyimide composite membranes coated on porous tubes for CO2 separation
AU - Kusakabe, Katsuki
AU - Ichiki, Kiyotaka
AU - Hayashi, Jun Ichiro
AU - Maeda, Hideaki
AU - Morooka, Shigeharu
N1 - Funding Information:
This work was partially supportedb y the Ministry of Education, Science and Culture (Grant No. 0675096), New Energy and Industrial Technology DevelopmenOt rganizationa nd the Research Institute of InnovativeT echnologyfo r the Earth, Japan.
PY - 1996/6/26
Y1 - 1996/6/26
N2 - 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.
AB - 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.
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U2 - 10.1016/0376-7388(95)00290-1
DO - 10.1016/0376-7388(95)00290-1
M3 - Article
AN - SCOPUS:0029663579
SN - 0376-7388
VL - 115
SP - 65
EP - 75
JO - Journal of Membrane Science
JF - Journal of Membrane Science
IS - 1
ER -