Protein-hydroxyapatite Composite Coatings on TiO2 Nanotube Layers and Bond Strength to Substrate

doi:10.3724/SP.J.1077.2011.00987

Abstract

Abstract: TiO₂ nanotubes on titanium with different diameters were prepared by anodic oxidation after heat-treated at 450℃. Hydroxyapatite (HA) coatings containing bovine serum albumin (BSA) were produced on the nanostructured surface through biomimetic co-deposition. The TiO₂ nanotube layers with 170nm diameter has a better mineralization ability compared that with diameter of 100nm and 50nm, And the HA formation ability is enhanced with increase of the diameters. The bonding strength of the coating to the nanotube layers with large diameter is higher than that with small diameter, and the maximal strength can reach 16.95MPa. Moreover, the pre-mineralization in vacuum significantly enhances the bonding strength, and increases growth rate of the coating. The BSA-HA coating with high bonding strength can fastly form on TiO₂ nanotube layers by pre-mineralization in vacuum and then biomimetic co-deposition, which would be a promised method for preparing titanium-based bioacitive coatings.

Key words: TiO₂ nanotubes, bovine serum albumin, apatite coating, bonding strength

CLC Number:

TG146

YU Rong, FENG Bo, WANG Jian-Xin, LU Xiong, QU Shu-Xin,WENG Jie. Protein-hydroxyapatite Composite Coatings on TiO₂ Nanotube Layers and Bond Strength to Substrate[J]. Journal of Inorganic Materials, 2011, 26(9): 987-992.

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Protein-hydroxyapatite Composite Coatings on TiO₂ Nanotube Layers and Bond Strength to Substrate

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