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

Handle URI:
http://hdl.handle.net/10754/599822
Title:
Swelling, Functionalization, and Structural Changes of the Nanoporous Layered Silicates AMH-3 and MCM-22
Authors:
Kim, Wun-gwi; Choi, Sunho; Nair, Sankar
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.
Publisher:
American Chemical Society (ACS)
Journal:
Langmuir
KAUST Grant Number:
KUS-I1-011-21
Issue Date:
21-Jun-2011
DOI:
10.1021/la200851j
PubMed ID:
21612250
Type:
Article
ISSN:
0743-7463; 1520-5827
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.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorKim, Wun-gwien
dc.contributor.authorChoi, Sunhoen
dc.contributor.authorNair, Sankaren
dc.date.accessioned2016-02-28T06:10:38Zen
dc.date.available2016-02-28T06:10:38Zen
dc.date.issued2011-06-21en
dc.identifier.citationKim 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.en
dc.identifier.issn0743-7463en
dc.identifier.issn1520-5827en
dc.identifier.pmid21612250en
dc.identifier.doi10.1021/la200851jen
dc.identifier.urihttp://hdl.handle.net/10754/599822en
dc.description.abstractNanoporous 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.en
dc.description.sponsorshipThis 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.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleSwelling, Functionalization, and Structural Changes of the Nanoporous Layered Silicates AMH-3 and MCM-22en
dc.typeArticleen
dc.identifier.journalLangmuiren
dc.contributor.institutionGeorgia Institute of Technology, Atlanta, United Statesen
kaust.grant.numberKUS-I1-011-21en

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