Reaction of Trimethylchlorosilane in Spin-On Silicalite-1 Zeolite Film

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Title Reaction of Trimethylchlorosilane in Spin-On Silicalite-1 Zeolite Film
Author Eslava, Salvador; Delahaye, Stephane; Baklanov, Mikhail R.; Iacopi, Francesca; Kirschhock, Christine E.A.; Maex, Karen; Martens, Johan A.
Journal Name Langmuir
Year Published 2008
Place of publication United States
Publisher American Chemical Society
Abstract We present a study on the hydrophobization of spin-on Silicalite-1 zeolite films through silylation with trimethylchlorosilane. Microporous and micro-mesoporous Silicalite-1 films were synthesized by spin coating of suspensions of Silicalite-1 nanozeolite crystallized for different times. Ellipsometric porosimetry with toluene and water adsorbates reveals that silylation decreases the porosity and makes the films hydrophobic. The decrease in porosity depends on the exposed surface area in the pores. Water contact angle measurements confirm the hydrophobicity. Fourier transform infrared spectroscopy reveals that the trimethylsilyl groups are chemisorbed selectively on isolated silanols and less on geminal and vicinal silanols due to steric limitations. Time-of-flight secondary-ion mass spectroscopy and in situ ellipsometry analysis of the reaction kinetics show that the silylation is a bulk process occurring in the absence of diffusion limitation. Electrical current leakage on films decreases upon silylation. Silylation with trimethylchlorosilane is shown to be an effective hydrophobization method for spin-on Silicalite-1 zeolite films.
Peer Reviewed Yes
Published Yes
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Copyright Statement Self-archiving of the author-manuscript version is not yet supported by this journal. Please refer to the journal link for access to the definitive, published version or contact the author[s] for more information.
Volume 24
Issue Number 9
Page from 4894
Page to 4900
ISSN 0743-7463
Date Accessioned 2012-02-18; 2012-03-29T04:50:57Z
Research Centre Queensland Micro and Nanotechnology Centre
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Synthesis of Materials
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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