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
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    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
Department
Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/300502
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