Preparation and characterisation of titania/hydroxyapatite composite coatings obtained by sol–gel process

• Published in: Biomaterials Vol. 22; no. 11; pp. 1425 - 1431
• Main Authors: Milella, E, Cosentino, F, Licciulli, A, Massaro, C
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-06-2001; Elsevier Science
• Subjects: Biocompatible Materials; Biological and medical sciences; Durapatite; Electron Probe Microanalysis; Gels; Medical sciences; Microscopy, Electron, Scanning; Morphology; Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects); Sol–gel; Surface; Technology. Biomaterials. Equipments. Material. Instrumentation; Titania/hydroxyapatite coating; Titanium; X-Ray Diffraction; Sol–gel; Titania/hydroxyapatite coating; Morphology; Surface; Encapsulation; Sol gel process; Binding energy; Surface properties; Titanium; Bioactive material; Hydroxyapatite; Chemical properties; Microstructure; Composite material; Coated material; Biomedical engineering
• ISSN: 0142-9612; 1878-5905
• DOI: 10.1016/S0142-9612(00)00300-8

In the present work a titania network encapsulating a hydroxyapatite particulate phase is proposed as a bioceramic composite coating. The coating on a titanium substrate was produced starting from a sol containing a mixture of titania colloidal particles and hydroxyapatite submicron particles using the dip-coating technique. The microstructure, the morphology and the surface chemical composition of the coating were characterised using X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), respectively. Adhesion tests were also performed. These analyses showed that the obtained coating was chemically clean, homogeneous, rough, porous, with a low thickness and well-defined phase composition as well as a good adhesion to the substrate.