One-step exfoliation of kaolinites and their transformation into nanoscrolls

Yoshiyuki Kuroda, Kazuyuki Ito, Kenichi Itabashi, Kazuyuki Kuroda

    Research output: Contribution to journalArticle

    102 Citations (Scopus)

    Abstract

    Kaolinite nanoscrolls, rolled kaolinite sheets with a tubular form, were prepared by a one-step route in which intercalation of guest species and swelling with solvent proceed at the same time. A methoxy-modified kaolinite was exfoliated by the intercalation of hexadecyltrimethylammonium chloride. The formation of nanoscrolls by the one-step route proceeded only by several alkyltrimethylammonium salts and 1-hexadecyl-3-methylimidazolium chloride. Intercalation of primary amines caused the formation of nanoscrolls by a two-step route in which the intercalation and swelling proceed separately. The successful one-step route is ascribed to the relatively weak interactions between the head groups of guest species and the interlayer surface of methoxy-modified kaolinite, and the interaction is thought to allow the formation of a flexible array of interlayer guest species for swelling. The tubular structure was mostly retained after the heat treatment at 600 °C to form hierarchically porous aluminosilicates with amorphous frameworks. The nanoscrolls intercalated organic guests species, which are not directly intercalated into methoxy-modified kaolinite, between the scrolled layers. The formation route to nanoscrolls is quite dependent not only on the surface modification of kaolinite but also on the structure of guest species.

    Original languageEnglish
    Pages (from-to)2028-2035
    Number of pages8
    JournalLangmuir
    Volume27
    Issue number5
    DOIs
    Publication statusPublished - 2011 Mar 1

    Fingerprint

    Kaolin
    kaolinite
    Kaolinite
    Intercalation
    intercalation
    routes
    swelling
    Swelling
    interlayers
    chlorides
    Aluminosilicates
    Amines
    Surface treatment
    Chlorides
    amines
    heat treatment
    Salts
    Heat treatment
    salts

    ASJC Scopus subject areas

    • Electrochemistry
    • Condensed Matter Physics
    • Surfaces and Interfaces
    • Materials Science(all)
    • Spectroscopy

    Cite this

    One-step exfoliation of kaolinites and their transformation into nanoscrolls. / Kuroda, Yoshiyuki; Ito, Kazuyuki; Itabashi, Kenichi; Kuroda, Kazuyuki.

    In: Langmuir, Vol. 27, No. 5, 01.03.2011, p. 2028-2035.

    Research output: Contribution to journalArticle

    Kuroda, Yoshiyuki ; Ito, Kazuyuki ; Itabashi, Kenichi ; Kuroda, Kazuyuki. / One-step exfoliation of kaolinites and their transformation into nanoscrolls. In: Langmuir. 2011 ; Vol. 27, No. 5. pp. 2028-2035.
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