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    Swelling, Functionalization, and Structural Changes of the Nanoporous Layered Silicates AMH-3 and MCM-22

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    Type
    Article
    Authors
    Kim, Wun-gwi
    Choi, Sunho
    Nair, Sankar
    KAUST Grant Number
    KUS-I1-011-21
    Date
    2011-06-21
    Permanent link to this record
    http://hdl.handle.net/10754/599822
    
    Metadata
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    Abstract
    Nanoporous layered silicate materials contain 2D-planar sheets of nanoscopic thickness and ordered porous structure. In comparison to porous 3D-framework materials such as zeolites, they have advantages such as significantly increased surface area and decreased diffusion limitations because the layers can potentially be exfoliated or intercalated into polymers to form nanocomposite materials. These properties are particularly interesting for applications as materials for enhancing molecular selectivity and throughput in composite membranes. In this report, the swelling and surface modification chemistry of two attractive nanoporous layered silicate materials, AMH-3 and MCM-22, were studied. We first describe a method, using long-chain diamines instead of monoamines, for swelling of AMH-3 while preserving its pore structure to a greater extent during the swelling process. Then, we describe a stepwise functionalization method for functionalizing the layer surfaces of AMH-3 and MCM-22 via silane condensation reactions. The covalently attached hydrocarbon chain molecules increased the hydrophobicity of AMH-3 and MCM-22 layer surfaces and therefore allow the possibility of effectively dispersing these materials in polymer matrices for thin film/membrane applications. © 2011 American Chemical Society.
    Citation
    Kim W, Choi S, Nair S (2011) Swelling, Functionalization, and Structural Changes of the Nanoporous Layered Silicates AMH-3 and MCM-22. Langmuir 27: 7892–7901. Available: http://dx.doi.org/10.1021/la200851j.
    Sponsors
    This publication is based on work supported by Award No. KUS-I1-011-21, made by King Abdullah University of Science and Technology (KAUST). The authors thank Dr. J. Leisen and Prof. W. J. Koros (Georgia Tech) for useful discussions.
    Publisher
    American Chemical Society (ACS)
    Journal
    Langmuir
    DOI
    10.1021/la200851j
    PubMed ID
    21612250
    ae974a485f413a2113503eed53cd6c53
    10.1021/la200851j
    Scopus Count
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