Asymmetric hollow fiber gas separation membrane
First Claim
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1. An asymmetric hollow fiber membrane for gas separation made of a soluble aromatic polyimide, whereinan orientation index is 1.3 or less,a separation coefficient α
- (P′
O2/P′
N2) which represents a ratio of permeation rate of oxygen gas and nitrogen gas at 40°
C. is 5.3 or more, anda tensile elongation at break is 15% or more.
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Abstract
The present invention relates to an asymmetric hollow fiber membrane for gas separation made of a soluble aromatic polyimide, wherein an orientation index is 1.3 or less, a separation coefficient α(P′O2/P′N2) as a permeation rate ratio of oxygen gas/nitrogen gas at 40° C. is 5.3 or more, and a tensile fracture elongation is 15% or more.
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Citations
5 Claims
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1. An asymmetric hollow fiber membrane for gas separation made of a soluble aromatic polyimide, wherein
an orientation index is 1.3 or less, a separation coefficient α - (P′
O2/P′
N2) which represents a ratio of permeation rate of oxygen gas and nitrogen gas at 40°
C. is 5.3 or more, anda tensile elongation at break is 15% or more. - View Dependent Claims (2, 3, 4, 5)
- (P′
Specification