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Preparation of multilayer poly (amide-12-b-ethylene oxide) composite membrane and their performance for gas separation

Authors： REN Xiaoling,REN Jizhong*,DENG Maicun

Units： National Engineering Research Center of Membrane Technology, Dalian Institute of Chemical Physics, Dalian 116023,China

KeyWords： CO2 separation；multilayer composite membrane；Block copolymer p

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2012,32(2):30-35

Abstract：

Block copolymer poly (amide-12-b-ethylene oxide) (PEBA1074) is used to fabricate multilayer polyetherimide(PEI)/polydimethylsilicone(PDMS)/PEBA1074/PDMS composite membranes by dip-coating method. The effects of operating conditions on the performance of the multilayer composite membranes are investigated. PEI/PDMS/PEBA1074/PDMS composite membranes show high permeance for polar gases and high ideal selectivity for polar/nonpolar gas systems. Due to CO2 induced plasticization effect, the CO2 permeance increases with increasing pressure. When temperature increases, the permeance of CO2, N2, H2, and CH4 through the composite membrane increases, while the selectivity of CO2/nonpolar gas (N2, H2, and CH4) decreases. The temperature dependency of gas permeance can be expressed by different Arrhenius equations below and above the melting temperature of PEO. The apparent activation energies of permeation decreases when the operation temperature is above the melting temperature of PEO.

Funds：

863基金项目（2008AA06Z325）和国际科技交流与合作专项（2009DFA61700）支持

AuthorIntro：

任晓灵（1984-），女，河北石家庄，博士，从事膜分离过程研究.?通讯联系人, renjizhong@dicp.ac.cn

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