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Gas permeation properties of Pebax/[Bmim][PF6] blend membranes

Authors： QIU Yongtao1,2, REN Jizhong1,*, ZHAO Dan 1, LI Hui1, HUA Kaisheng1, WANG Ying 1, HUANG Xuefei3, DENG Maicun1

Units： 1. National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China; 3. Heifei Jianghang Aircraft Equipment Co., LTD, Hefei 230051, China

KeyWords： poly(amide-6-b-ethylene oxide); blend membrane; ionic liquid

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2016,36(5):9-15

Abstract：

In this paper, Pebax1657/1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) blend membranes with different content of [Bmim][PF6] were prepared via solution casting and solvent evaporation method. Physical properties of blend membranes were characterized by Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD). Results indicated that the hydrogen bond was destroyed, and the crystallization ability decreased. The effect of [Bmim][PF6] content, operating temperature and pressure on the gas (N2, CH4, H2 and CO2) permeabilities was evaluated. With the increase of [Bmim][PF6] content, the permeabilities of N2, CH4, H2 and CO2 decreased. The effect of pressure on the CO2 and non-polar gas permeabilities was different. With the increase of temperature, the permeabilities of N2, CH4, H2 and CO2 increased, similarly, the apparent activation energies of N2, CH4, H2 and CO2 increased.

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