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    Effect of processing on carbon molecular sieve structure and performance

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    Type
    Article
    Authors
    Das, Mita
    Perry, John D.
    Koros, William J.
    KAUST Grant Number
    KUS-I1-011-21
    Date
    2010-11
    Permanent link to this record
    http://hdl.handle.net/10754/598057
    
    Metadata
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    Abstract
    Sub-micron sized carbon molecular sieve (CMS) materials were produced via ball milling for subsequent use in hybrid material formation. A detailed analysis of the effects of the milling process in the presence of different milling environments is reported. The milling process apparently alters the molecular scale structure and properties of the carbon material. Three cases: unmilled, air milled and nitrogen milled, were analyzed in this work. The property changes were probed using equilibrium sorption experiments with different gases. Furthermore, WAXD and BET results also showed differences between milling processes. Finally in order to improve the interfacial polymer-sieve region of hybrid membranes, the CMS surface was chemically modified with a linkage unit capable of covalently bonding the polymer to the sieve. A published single-wall carbon nanotube (SWCNTs) modification method was adopted to attach a primary aromatic amine to the surface. Several aspects including rigidity, chemical composition, bulky groups and length were considered in selecting the preferred linkage unit. Fortunately kinetic and equilibrium sorption properties of the modified sieves showed very little difference from unmodified samples, suggesting that the linkage unit is not excessively filling or obstructing access to the pores of the CMSs during the modification process. © 2010 Elsevier Ltd. All rights reserved.
    Citation
    Das M, Perry JD, Koros WJ (2010) Effect of processing on carbon molecular sieve structure and performance. Carbon 48: 3737–3749. Available: http://dx.doi.org/10.1016/j.carbon.2010.06.036.
    Sponsors
    This publication was based on work supported in part by Award No. KUS-I1-011-21 made by King Abdullah University of Science and Technology (KAUST) and NSF-STC.
    Publisher
    Elsevier BV
    Journal
    Carbon
    DOI
    10.1016/j.carbon.2010.06.036
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.carbon.2010.06.036
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