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    Tuning Structure and Properties of Graded Triblock Terpolymer-Based Mesoporous and Hybrid Films

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    Type
    Article
    Authors
    Phillip, William A.
    Mika Dorin, Rachel
    Werner, Jörg
    Hoek, Eric M. V.
    Wiesner, Ulrich
    Elimelech, Menachem
    KAUST Grant Number
    KUS-C1-018-02
    Date
    2011-07-13
    Permanent link to this record
    http://hdl.handle.net/10754/600093
    
    Metadata
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    Abstract
    Despite considerable efforts toward fabricating ordered, water-permeable, mesoporous films from block copolymers, fine control over pore dimensions, structural characteristics, and mechanical behavior of graded structures remains a major challenge. To this end, we describe the fabrication and performance characteristics of graded mesoporous and hybrid films derived from the newly synthesized triblock terpolymer, poly(isoprene-b-styrene-b-4-vinylpyridine). A unique morphology, unachievable in diblock copolymer systems, with enhanced mechanical integrity is evidenced. The film structure comprises a thin selective layer containing vertically aligned and nearly monodisperse mesopores at a density of more than 1014 per m2 above a graded macroporous layer. Hybridization via homopolymer blending enables tuning of pore size within the range of 16 to 30 nm. Solvent flow and solute separation experiments demonstrate that the terpolymer films have permeabilities comparable to commercial membranes, are stimuli-responsive, and contain pores with a nearly monodisperse diameter. These results suggest that moving to multiblock polymers and their hybrids may open new paths to produce high-performance graded membranes for filtration, separations, nanofluidics, catalysis, and drug delivery. © 2011 American Chemical Society.
    Citation
    Phillip WA, Mika Dorin R, Werner J, Hoek EMV, Wiesner U, et al. (2011) Tuning Structure and Properties of Graded Triblock Terpolymer-Based Mesoporous and Hybrid Films. Nano Lett 11: 2892–2900. Available: http://dx.doi.org/10.1021/nl2013554.
    Sponsors
    This publication is based on work supported by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST). R.M.D. acknowledges support from the NSF Graduate Research Fellowship Program (GRFP).
    Publisher
    American Chemical Society (ACS)
    Journal
    Nano Letters
    DOI
    10.1021/nl2013554
    PubMed ID
    21648394
    ae974a485f413a2113503eed53cd6c53
    10.1021/nl2013554
    Scopus Count
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