Laboratory of Chemistry and Electrochemistry of Surfaces, University of Namur, FUNDP, Rue de Bruxelles 61, B-5000 Namur, Belgium.
J Colloid Interface Sci. 2010 Apr 15;344(2):390-4. doi: 10.1016/j.jcis.2010.01.023. Epub 2010 Feb 1.
The development of new biomaterials is one of the most challenging tasks in material science. Metals and particularly titanium and its alloys are widely used because of their good corrosion resistance, mechanical properties and biocompatibility. However, the toxicity of alloys, long term degradation in body fluids and risks of loosening are still problematic. To increase the corrosion resistance of the material and reduce ion release, our interest focused on tantalum, another metal well known for its excellent biocompatibility and resistance to bio-corrosion. These very good properties make tantalum a metal of interest for biomaterials but its high cost and high density disqualify it for use as bulk material. In this paper, we propose to combine the good bulk properties of titanium with the excellent surface properties of tantalum by using sol-gel deposition of a tantalum oxide layer on bare titanium. Furthermore, as orthopedics implants are part of our long term goals, we report on the formation of a composite layer of tantalum oxide and multiwalled carbon nanotubes (MWCNTs). MWCNTs have been shown to have promising properties in contact with bone and bone cells and could strengthen the implant. Characterizations are performed using X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM).
新型生物材料的开发是材料科学中最具挑战性的任务之一。由于其良好的耐腐蚀性、机械性能和生物相容性，金属尤其是钛及其合金得到了广泛的应用。然而，合金的毒性、在体液中的长期降解以及松动的风险仍然是个问题。为了提高材料的耐腐蚀性并减少离子释放，我们的兴趣集中在另一种金属钽上，钽以其优异的生物相容性和耐生物腐蚀性而闻名。这些非常好的性能使钽成为生物材料的一种有前途的金属，但它的高成本和高密度使其不适合作为块状材料使用。在本文中，我们建议通过在裸钛上使用溶胶-凝胶沉积法沉积一层氧化钽来结合钛的良好块状性能和钽的优异表面性能。此外，由于骨科植入物是我们长期目标的一部分，我们报告了氧化钽和多壁碳纳米管（MWCNT）复合层的形成。MWCNT 已被证明在与骨骼和骨细胞接触时具有有前途的性能，并可以增强植入物。使用 X 射线光电子能谱（XPS）和扫描电子显微镜（SEM）进行了表征。
