Počet záznamů: 1  

Mixed matrix membranes based on 3-aminopropyltriethoxysilane endcapped polyimides and silicalite-1

  1. 1.
    0379898 - ÚFCH JH 2013 RIV US eng J - Článek v odborném periodiku
    Fryčová, Marie - Sysel, P. - Kočiřík, Milan - Brabec, Libor - Hrabánek, Pavel - Prokopová, Olga - Bernauer, B. - Zikánová, Arlette
    Mixed matrix membranes based on 3-aminopropyltriethoxysilane endcapped polyimides and silicalite-1.
    Journal of Applied Polymer Science. Roč. 124, SI 1 (2012), E233-E240. ISSN 0021-8995. E-ISSN 1097-4628
    Grant CEP: GA ČR GA203/09/1353
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: membranes * polyimides * zeolites
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 1.395, rok: 2012

    To improve membrane permeability and the quality of the polymer-zeolite interface such that the separation factor is maintained or enhanced, we adopted a novel approach to the preparation of mixed matrix membranes (MMMs). Our approach involved endcapping polyamic acid (PAA) with the coupling agent 3-aminopropyltriethoxysilane (APTES) and then bonding the endcapped polyimide (PI) to silicalite-1. The APTES-endcapped polyimide precursors reacted with silanol groups on the silicalite-1 surface and were transformed into the final polyimide (PI) matrices. Five precursors were used to create five series of MMMs; each series contained membranes with a content of silicalite-1 ranging from 0 to 50 wt %. The helium permeability coefficient of the membranes was measured and found to be dependent on both the amount of filler and type of PI matrix. In the most permeable series, helium permeability coefficient increased from 16.3 x 10(-15) mol m-1 s-1 Pa-1 for unfilled membranes to 69.1 x 10(-15) mol m-1 s-1 Pa-1 for membranes containing 30 wt % silicalite-1. The ideal helium/nitrogen separation factor ranged between 22 and 45. Thus, it seems that our novel approach improves the interfacial adhesion of MMMs. (C) 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
    Trvalý link: http://hdl.handle.net/11104/0007122

     
     
Počet záznamů: 1  

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