聚氧化乙烯[poly(ethylene oxide),PEO]类膜材料合有大量与CO2有很强相互作用的醚氧基团,使得它具有很高的CO2/light gases(例如:H2、N2、CH4)溶解选择性,因此带来很高的CO2/light gases选择性.介绍了具有高溶解选择性CO2气体分离膜材料的筛选,重点叙述了PEO类膜材料的发展以及目前主要的PEO类膜材料的气体分离性能.当PEO含量达到足够高时,PEO类膜材料的CO2/light gases选择性大小基本相同,而它们的CO2透气性随着膜材料链段结构的不同而有较大不同.
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