Apatite-forming ability on titanium surface modified by hydrothermal treatment and ultraviolet irradiation
Apatite-forming ability on titanium surface modified by hydrothermal treatment and ultraviolet irradiation
复制标题
水热处理和紫外辐照改性钛表面的磷灰石形成能力
DOI：
10.1557/jmr.2008.0385
复制
发表时间：
2008
影响因子：
2.7
通讯作者：
T. Kasuga
中科院分区：
文献类型：
--
作者：
A. Obata;Tianshu Zhai;T. Kasuga
使用稀碱性溶液进行水热处理，在钛表面形成各种形貌的二氧化钛涂层，并在紫外线（UV）照射下评估其在模拟体液（1.5SBF）中形成羟基磷灰石（HA）的能力。紫外线照射增强了 1.5SBF 中二氧化钛涂层上 HA 的形成。在紫外线照射下在 1.5SBF 中浸泡 24 h 后，二氧化钛上吸附的磷酸基团的量估计大于钙离子的吸附量，而在没有紫外线照射的浸泡后，二氧化钛上钙离子的吸附量大于磷酸基团的吸附量。研究表明，二氧化钛通过紫外线照射在其表面生成了大量碱性Ti-OH基团，随后吸附了磷酸基团，例如H_2PO_4^−，从而形成了富含这些基团的新表面，最终增强了1.5SBF中HA的形成。
Titania coatings with various morphologies were formed on titanium surfaces by hydrothermal treatment using a dilute alkaline solution and evaluated in their hydroxyapatite (HA)-forming abilities in simulated body fluid (1.5SBF) under ultraviolet (UV) irradiation. The HA formation on the titania coating in 1.5SBF was enhanced by UV irradiation. The amount of phosphate groups adsorbed on the titania, after soaking in 1.5SBF for 24 h under UV irradiation, was estimated to be larger than that of calcium ions, whereas that of calcium ions on the titania, after soaking without UV irradiation, was larger than that of phosphate groups. It was suggested that the titania generated much basic Ti–OH groups at its surface by UV irradiation and subsequently adsorbed phosphate groups, such as H_2PO_4^−, resulting in the formation of a new surface rich in the amount of the groups, which eventually enhanced the HA formation in 1.5SBF.