QCM STUDIES ON ADSORPTION OF WATER MOLECULES ON A SINGLE-LAYERED CLAY FILM

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  • Komatu Masataka
    Department of Earth and Planetary Sciences, Graduate School of Science, The University of Tokyo
  • Tamura Kenji
    Environment and Energy Materials Division, National Institute of Materials Science
  • Saruwatari Kazuko
    Department of Earth and Planetary Sciences, Graduate School of Science, The University of Tokyo
  • Yamagishi Akihiko
    Center of Analytical Quality Control for the Environment
  • Sato Hisako
    Department of Chemistry, Faculty of Science, Ehime University

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Abstract

<p>The adsorption of water molecules on the surface of a clay mineral was studied by means of quartz crystal microbalance (QCM) measurements. For the purpose, an ultra-thin film of exfoliated montmorillonite sheets was prepared by the modified Langmuir method. On introducing a nitrogen gas at various humidity, the adsorption and desorption processes of water molecules on a clay film were monitored in terms of mass change. The adsorbed amount of water molecules was compared among the following four films: (F1) a single-layered clay-amphiphile hybrid film, (F2) a single layered clay film, (F3) a double layered clay-amphiphile hybrid film and (F4) a double-layered clay film. The nature of adsorbed water molecules was investigated by comparing the IR spectra between F1 and a cast film.</p>

Journal

  • Clay Science

    Clay Science 20 (1), 13-19, 2016

    The Clay Science Society of Japan

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