CPC B01D 53/228 (2013.01) [B01D 53/268 (2013.01); B01D 67/0088 (2013.01); B01D 69/02 (2013.01); B01D 69/12 (2013.01); B01D 69/125 (2013.01); B01D 71/56 (2013.01); B01D 71/64 (2013.01); B01D 71/68 (2013.01); B01D 71/82 (2013.01); B01D 71/52 (2013.01); B01D 2053/223 (2013.01); B01D 2256/10 (2013.01); B01D 2256/22 (2013.01); B01D 2256/245 (2013.01); B01D 2257/108 (2013.01); B01D 2257/11 (2013.01); B01D 2311/04 (2013.01); B01D 2325/04 (2013.01); B01D 2325/20 (2013.01)] | 16 Claims |
1. A gas separation membrane comprising:
a hollow fiber membrane comprising:
a porous support layer with a thickness between 30 μm and 100 μm;
an aromatic polyamide layer with a thickness between 20 nm and 200 μm formed on the porous support layer via interfacial polymerization; and
a coating with a thickness of less than 1 μm comprising a glassy polymer formed on the aromatic polyamide layer and that plugs defects in the aromatic polyamide layer, wherein a glass transition temperature of the glassy polymer is greater than 50° C., and wherein the hollow fiber membrane has a selectivity of helium over carbon dioxide greater than 40 after coating,
wherein the glassy polymer is poly(phenylene oxide).
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