Journal of Inorganic Materials ›› 2012, Vol. 27 ›› Issue (9): 923-927.DOI: 10.3724/SP.J.1077.2012.11655

• Research Paper • Previous Articles     Next Articles

Preparation and Gas Separation Properties of Carbon/Carbon Nanotubes Hybrid Membranes Derived from PMDA-ODA Polyimide

SONG Cheng-Wen1, JIANG Da-Wei2, LI Lin2, SUN Mei-Yue2, WANG Tong-Hua2   

  1. (1. School of Environment Science and Engineering, Dalian Maritime University, Dalian 116026, China; 2. Carbon Research Laboratory and State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China)
  • Received:2011-10-20 Revised:2011-12-22 Published:2012-09-20 Online:2012-08-28
  • About author:SONG Cheng-Wen.E-mail: songchengwen_dmu@yahoo.com.cn
  • Supported by:

    National Natural Science Foundation of China (20776024, 20836006, 20976021); National High-tech Research and Development Project of China (2009AA03Z215); Scientific Research Fund of Liaoning Provincial Education Department (2009A098); Fundamental Research Funds for the Central Universities (2011QN141); Special Foundation for Ocean Environmental Protection of Ocean and Fisheries Department of Liaoning Province (2012-Inhyhbc-0004, 2012-Inhyhbc-0005)

Abstract: A convenient and effective strategy was used to develop a novel carbon/carbon nanotubes (C/CNT) hybrid membrane by incorporating multi-walled carbon nanotubes (MWNT) into PMDA-ODA polyimide precursor through controlled pyrolysis process at 600℃. Transmission electron microscope, X-ray diffraction and gas permeation experiments were employed to investigate the microstructural characteristics and gas separation performance of hybrid carbon membrane. Results show that the as-prepared C/CNT hybrid membrane has excellent gas (H2, CO2, O2, N2 and CH4) separation properties as compared with pure carbon membrane, and the O2 permeability of hybrid carbon membrane increases by nearly 4 times reaching 1576 Barrer, while the O2/N2 permselectivity decreasing by only 17%. It is believed that carbon membrane doped by MWNT can make effective use of the interfacial gaps formed between MWNT and carbon matrix to reconstruct the pore structure of hybrid carbon membrane, which helps to increase the gas diffusion ability and further improve the gas permeability of hybrid carbon membrane.

Key words: carbon nanotubes, polyimide, preparation, gas separation

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