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Fast assembly of bio-inspired nanocomposite films

Vertlib, Viatcheslav ; Dietiker, Marianne ; Plötze, Michael ; Yezek, Lee ; Spolenak, Ralph ; Puzrin, Alexander M.

In: Journal of Materials Research, 2008, vol. 23, no. 4, p. 1026-1035

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    Titre
    • Fast assembly of bio-inspired nanocomposite films
    Auteur
    • Vertlib, Viatcheslav. Laboratory for Clay Mineralogy, Institute for Geotechnical Engineering, ETH Zurich, 8093 Zurich, Switzerland
    • Dietiker, Marianne. Laboratory for Nanometallurgy, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
    • Plötze, Michael. Laboratory for Clay Mineralogy, Institute for Geotechnical Engineering, ETH Zurich, 8093 Zurich, Switzerland
    • Yezek, Lee. Laboratory for Clay Mineralogy, Institute for Geotechnical Engineering, ETH Zurich, 8093 Zurich, Switzerland
    • Spolenak, Ralph. Laboratory for Nanometallurgy, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
    • Puzrin, Alexander M.. Laboratory for Clay Mineralogy, Institute for Geotechnical Engineering, ETH Zurich, 8093 Zurich, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Journal of Materials Research, 2008, vol. 23, no. 4, p. 1026-1035. Cambridge University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:303078
    Summary
    This paper presents a spin-coating layer-by-layer assembly process to prepare multilayered polyelectrolyte-clay nanocomposites. This method allows for the fast production of films with controlled layered structure. The preparation of a 100-bilayer film with a thickness of about 330 nm needs less than 1 h, which is 20 times faster than conventional dip-coating processes maintaining the same hardness and modulus values. For validation of this technique, nanocomposite films with thicknesses up to 0.5 μm have been created with the common dip self-assembly and with the spin coating layer-by-layer assembly technique from a poly(diallyldimethylammonium)chloride (PDDA) solution and a suspension of a smectite clay mineral (Laponite). Geometrical characteristics (thickness, roughness, and texture) as well as mechanical characteristics (hardness and modulus) of the clay-polyelectrolyte films have been studied. The spin-coated nanocomposite films exhibit clearly improved mechanical properties (hardness 0.4 GPa, elastic modulus 7 GPa) compared to the "pure” polymer film, namely a sixfold increase in hardness and a 17-fold increase in Young's modulus