Electrophoretic deposition of functionalized polystyrene particles for TiO₂ multi-scale structured surfaces
- Radice, S. EMPA, Swiss Federal Laboratories for Materials Testing and Research, Laboratory for Mechanics of Materials and Nanostructures, Thun, Switzerland
- Dietsch, Hervé Adolphe Merkle Institute and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
- Mischler, S. Ecole Polytechnique Fédérale de Lausanne (EPFL), Lab. for Metallurgical, Lausanne, 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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10.11.2009
Published in:
- Surface and Coatings Technology. - 2010, vol. 204, no. 11, p. 1749-1754
English
Titanium is an interesting material for biomedical implants thanks to its physical and chemical properties. In particular, TiO₂ coatings with a surface characterized by micro-patterning combined with nano-topography are extremely attractive for orthopaedic implants in terms of enhanced osteointegration and consequently improved implant fixation. In the present work, a new method for the preparation of TiO₂ multi-scale structured coatings is presented. This method is based on three steps. Firstly, monodispersed polystyrene (PS) microsized beads are functionalized with TiO₂ submicron particles by a wet process involving a cationic polyelectrolyte. Secondly, the resulting TiO₂-PS composite particles in suspension are used to prepare coatings by electrophoretic deposition (EPD), a simple and flexible electrochemical technique. The EPD is performed cathodically, avoiding uncontrolled oxidation of the substrate. Finally, after removal of the PS spacers during the sintering process, TiO₂ coatings with a combined micro- and nano-topography are achieved from deposits thicker than 100 µm. This achievement presents two relevant aspects: potential applications of the multi-scale structured TiO₂ surfaces (particularly in the biomedical field); the simplicity and flexibility of the process used.
- Faculty
- Faculté des sciences et de médecine
- Department
- AMI - Soft Nanoscience
- Language
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- English
- Classification
- Chemistry
- License
- License undefined
- Identifiers
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- RERO DOC 18114
- DOI 10.1016/j.surfcoat.2009.11.001
- Persistent URL
- https://folia.unifr.ch/unifr/documents/301654
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