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    Correlation between polymer packing and gas transport properties for CO2/N2 separation in glassy fluorinated polyimide membrane

    Access Status
    Fulltext not available
    Authors
    Jawad, Zeinab
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Jawad, Z. 2016. Correlation between polymer packing and gas transport properties for CO2/N2 separation in glassy fluorinated polyimide membrane. Journal of Engineering Science and Technology. 11 (7): pp. 935-946.
    Source Title
    Journal of Engineering Science and Technology
    Additional URLs
    http://jestec.taylors.edu.my/Vol%2011%20issue%207%20July%202016/11_7_2.pdf
    School
    Curtin Sarawak
    URI
    http://hdl.handle.net/20.500.11937/43075
    Collection
    • Curtin Research Publications
    Abstract

    Gas separation performance of a membrane highly hinges on its physical properties. In this study, the interplay between polymer packing of a membrane and its gas transport behaviours (permeability and selectivity) was investigated through a series of 6FDA-DAM:DABA (3:2) polyimide membranes with different polymer compactness. The chemical structure and the polymer packing of the resulting membrane were characterized using attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) and packing density measurement, respectively. CO2/N2 separation efficiency of the membrane was evaluated at 25°C with feed pressure up to 6 bar. N2 permeability was found to rely on the membrane’s packing density, which signified its greater dependence on molecular sieving. In contrast, sorption showed a more vital role in determining the CO2 permeability. In this work, the membrane with a final thickness of 97±2 μm had successfully surpassed the Robeson’s 2008 upper bound plot with a CO2 permeability of 83 Barrer and CO2/N2 selectivity of 97 at 3 bar permeation.

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