Methods for functionalization of microsized polystyrene beads with titania nanoparticles for cathodic electrophoretic deposition

Radice, S.; Kern, P.; Dietsch, Hervé; Mischler, S.; Michler, J.

doi:10.1016/j.jcis.2007.10.061

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Journal article

Methods for functionalization of microsized polystyrene beads with titania nanoparticles for cathodic electrophoretic deposition

Radice, S. EMPA, Swiss Federal Laboratories for Materials Testing and Research, Laboratory for Mechanics of Materials and Nanostructures, Thun, Switzerland
Kern, P. EMPA, Swiss Federal Laboratories for Materials Testing and Research, Laboratory for Mechanics of Materials and Nanostructures, Thun, Switzerland - Hoffmann Neopac AG, Oberdiessbach, Switzerland
Dietsch, Hervé Fribourg Center for Nanomaterials (FriMat), Department of Physics, University of Fribourg, Switzerland
Mischler, S. Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland
Michler, J. EMPA, Swiss Federal Laboratories for Materials Testing and Research, Laboratory for Mechanics of Materials and Nanostructures, Thun, Switzerland

04.12.2007

Published in:

Journal of Colloid and Interface Science. - 2008, vol. 318, no. 2, p. 264-270

English Functionalization of colloidal particles based on the use of polyelectrolytes and heterocoagulation was combined with electrophoretic deposition (EPD), with the aim of depositing titania–polystyrene (TiO₂–PS) composite particles on Ti6Al4V substrates. The composite particles were obtained by heterocoagulation of TiO₂ nanoparticles on the surface of monosized polystyrene beads of 4.6 μm in diameter. Two alternative methods were developed for the preparation of the TiO₂–PS suspensions in organic fluids for cathodic electrodeposition. The first method was carried out in alkaline aqueous medium with the use of polyelectrolytes and intermediate control measurements of zeta potential, conductivity, and pH; the second one was carried out directly in the organic solvent used for EPD, typically isopropanol. Examples of deposits obtained by EPD in both suspensions and a comparative analysis between the two methods are presented.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language