Intercalation of poly(oxyethylene) alkyl ether into a layered silicate kanemite

Nobuyuki Takahashi, Hiroaki Tamura, Dai Mochizuki, Tatsuo Kimura, Kazuyuki Kuroda

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    Abstract

    Poly(oxyethylene) alkyl ether (CnEOm) is intercalated into the interlayer space of a layered silicate kanemite by using layered hexadecyltrimethylammonium (C16TMA) intercalated kanemite (C 16TMA-kanemite) as the intermediate. C16TMA-kanemite was treated with an aqueous solution of C16EO10, and the intercalation of C16EO10 was confirmed by the slight increase in the basal spacing (from 2.92 to 3.34 nm) with the increase in the carbon content, yielding C16EO10-C16TMA- kanemite. The product was dispersed again in a C16EO10 aqueous solution, and then 1.0 M HCl was added to the suspension to remove C16TMA ions completely. The basal spacing was further increased (from 3.34 to 5.52 nm) and the content of nitrogen was virtually zero, indicating further intercalation of C16EO10 molecules and complete elimination of C16TMA ions simultaneously. Though C 16EO10 molecules are not directly intercalated into kanemite, the mutual interactions among C16TMA ions, C 16EO10 molecules, and the interlayer silicate surfaces effectively induce the intercalation of C16EO10. C 16EO10-kanemite shows a reversible adsorption of n-decane and water owing to the hydrophobicity and hydrophilicity of C 16EO10, respectively, in the interlayer space. Layered CnEO10-kanemites (n = 12 and 18) were also synthesized in a manner similar to layered C16EO10-kanemite.

    Original languageEnglish
    Pages (from-to)10765-10771
    Number of pages7
    JournalLangmuir
    Volume23
    Issue number21
    DOIs
    Publication statusPublished - 2007 Oct 9

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    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Colloid and Surface Chemistry

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