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    Synthesis and Characterization of a Novel Microporous Dihydroxyl-Functionalized Triptycene-Diamine-Based Polyimide for Natural Gas Membrane Separation

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    Type
    Article
    Authors
    Alaslai, Nasser Y. cc
    Ma, Xiaohua
    Ghanem, Bader cc
    Wang, Yingge
    Alghunaimi, Fahd cc
    Pinnau, Ingo cc
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Chemical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2017-07-10
    Online Publication Date
    2017-07-10
    Print Publication Date
    2017-09
    Permanent link to this record
    http://hdl.handle.net/10754/625678
    
    Metadata
    Show full item record
    Abstract
    An intrinsically microporous polyimide is synthesized in m-cresol by a one-pot high-temperature condensation reaction of 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and newly designed 2,6 (7)-dihydroxy-3,7(6)-diaminotriptycene (DAT1-OH). The 6FDA-DAT1-OH polyimide is thermally stable up to 440 °C, shows excellent solubility in polar solvents, and has moderately high Brunauer-Teller-Emmett (BET) surface area of 160 m2 g-1 , as determined by nitrogen adsorption at -196 °C. Hydroxyl functionalization applied to the rigid 3D triptycene-based diamine building block results in a polyimide that exhibits moderate pure-gas CO2 permeability of 70 Barrer combined with high CO2 /CH4 selectivity of 50. Mixed-gas permeation studies demonstrate excellent plasticization resistance of 6FDA-DAT1-OH with impressive performance as potential membrane material for natural gas sweetening with a CO2 permeability of 50 Barrer and CO2 /CH4 selectivity of 40 at a typical natural gas well partial pressure of 10 atm.
    Citation
    Alaslai N, Ma X, Ghanem B, Wang Y, Alghunaimi F, et al. (2017) Synthesis and Characterization of a Novel Microporous Dihydroxyl-Functionalized Triptycene-Diamine-Based Polyimide for Natural Gas Membrane Separation. Macromolecular Rapid Communications 38: 1700303. Available: http://dx.doi.org/10.1002/marc.201700303.
    Sponsors
    This research was supported by funding from the King Abdullah University of Science and Technology (KAUST).
    Publisher
    Wiley
    Journal
    Macromolecular Rapid Communications
    DOI
    10.1002/marc.201700303
    PubMed ID
    28691317
    Additional Links
    http://onlinelibrary.wiley.com/doi/10.1002/marc.201700303/full
    ae974a485f413a2113503eed53cd6c53
    10.1002/marc.201700303
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Chemical Engineering Program

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