Thermally rearranged (TR) poly(benzoxazole-co-amide) membranes for hydrogen separation derived from 3,3'-dihydroxy-4,4'-diamino-biphenyl (HAB), 4,4'-oxydianiline (ODA) and isophthaloyl chloride (IPCl)
作者： Yu Seong Do , Jong Geun Seong , Seungju Kim , Jong Gyu Lee , Young Moo Lee
DOI: 10.1016/J.MEMSCI.2013.06.059
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摘要: Abstract Thermally rearranged poly(benzoxazole-co-amide) (TR-PBOA) copolymer membranes were prepared by treating poly( o -hydroxyamide-co-amide) (PHAA) precursors in-situ thermal cyclization reaction for the H 2 separation at high temperature. The physical properties, membrane processability and gas permeation property can be controlled varying ratio of diamine compounds. rigid biphenyl moiety in increases selectivity whereas flexible ether improves as well permeability. Moreover, rearrangement process affects properties TR membranes. polymer derived from polyhydroxyamides (PHAs) demonstrated permeability, but low /CO selectivity. However, TR-PBOA improved Both permeability over CO increased due to activation energy through explained thermodynamic theory with highest performance was 26.8 Barrer 8.0 measured 210 °C.
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