Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University, 1200 Matsumoto-cho, Kasugai, 487-8501, Japan.
J Mater Sci Mater Med. 2011 Feb;22(2):273-8. doi: 10.1007/s10856-010-4218-y. Epub 2010 Dec 29.
Titanium (Ti) metal was soaked in HCl solution after NaOH treatment and then subjected to heat treatments at different temperatures. Their apatite-forming abilities in a simulated body fluid (SBF) were discussed in terms of their surface structures and properties. The nanometer scale roughness formed on Ti metal after NaOH treatment remained after the HCl treatment and a subsequent heat treatment below 700°C. Hydrogen titanate was formed on Ti metal from an HCl treatment after NaOH treatment, and this was converted into titanium oxide of anatase and rutile phases by a subsequent heat treatment above 500°C. The scratch resistance of the surface layer increased with the formation of the titanium oxide after a heat treatment up to 700°C, and then decreased with increasing temperature. The Ti metal with a titanium oxide layer formed on its surface showed a high apatite-forming ability in SBF when the heat treatment temperature was in the range 500-700°C. The high apatite-forming ability was attributed to the positive surface charge in an SBF. These positive surface charges were ascribed to the presence of chloride ions, which were adsorbed on the surfaces and dissociated in the SBF to give an acid environment.
钛（Ti）金属在经过氢氧化钠处理后浸泡在盐酸溶液中，然后在不同温度下进行热处理。从表面结构和性能方面讨论了它们在模拟体液（SBF）中的成磷灰石能力。NaOH 处理后在 Ti 金属上形成的纳米级粗糙度在 HCl 处理后仍然存在，并且在低于 700°C 的后续热处理中也是如此。在 NaOH 处理后的 HCl 处理后，在 Ti 金属上形成了氢钛酸盐，并且通过高于 500°C 的后续热处理将其转化为锐钛矿和金红石相的二氧化钛。随着 700°C 以下热处理后钛氧化物的形成，表面层的耐磨性增加，然后随着温度的升高而降低。在 500-700°C 的热处理温度范围内，在其表面形成钛氧化物层的 Ti 金属在 SBF 中表现出高的磷灰石形成能力。高的磷灰石形成能力归因于 SBF 中的正表面电荷。这些正表面电荷归因于存在吸附在表面上并在 SBF 中解离以产生酸性环境的氯离子。
