Cathodic alkaline treatment of zirconium to give the ability to form calcium phosphate.
Cathodic alkaline treatment of zirconium to give the ability to form calcium phosphate.
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DOI：
10.1016/j.actbio.2010.05.010
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发表时间：
2010-10
影响因子：
9.7
通讯作者：
Y. Tsutsumi;D. Nishimura;H. Doi;N. Nomura;T. Hanawa
中科院分区：
文献类型：
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作者：
Y. Tsutsumi;D. Nishimura;H. Doi;N. Nomura;T. Hanawa
在本研究中讨论的在锆（Zr）表面上形成碱性环境的阴极极化技术是独特的，并且提供了在模拟体液中形成磷酸钙的能力;另一方面，许多先前的研究已经使用浸入碱性溶液中进行。在这项研究中，两个离散技术进行了研究。Zr在不含钙和磷酸根离子的电解质中阴极极化，Zr在另一种含有钙和磷酸根离子的电解质Hanks溶液中阴极极化，以直接形成磷酸钙层。使用X射线光电子能谱对表面进行表征，并通过浸入Hanks溶液中来评估材料的性能。结果表明，在含H_2O_2的Na_2SO_4溶液中，H_2O_2的阴极极化作用使H_2O_2在Hanks溶液中生成磷酸钙。此外，在Hanks溶液中直接形成羟基磷灰石需要-1.5 VSCE以下的阴极电位。这项研究清楚地揭示了有用的表面改性技术，通过阴极极化在模拟体液中形成磷酸钙的能力。
The cathodic polarization technique to form an alkaline environment on a zirconium (Zr) surface, discussed in the present study, is unique, and gives the ability to form calcium phosphate in a simulated body fluid to Zr; on the other hand, many previous studies have been conducted using immersion in alkaline solutions. In this study, two discrete techniques were investigated. Zr was cathodically polarized in an electrolyte without calcium and phosphate ions, and Zr was cathodically polarized in another electrolyte containing calcium and phosphate ions, Hanks’ solution, to directly form a calcium phosphate layer. The surface was characterized using X-ray photoelectron spectroscopy, and the performance of the material was evaluated by immersion in Hanks’ solution. As a result, the ability to form calcium phosphate in Hanks’ solution was given by cathodic polarization in the Na2SO4solution containing H2O2. In addition, a cathodic potential under −1.5 VSCEis required to form hydroxyapatite directly in Hanks’ solution. This research clearly reveals useful surface modification techniques giving the ability to form calcium phosphate in a simulated body fluid by cathodic polarization.