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采用水熱方法在鎳鈦合金表面一步合成TiO2-羥基磷灰石納米薄膜
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西安交通大學(xué)

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R318.08

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One-step Synthesis of TiO2-hydroxyapatite Nano-films on NiTi alloy by a Hydrothermal Method
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Xi'an Jiaotong University

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National Natural Science Foundation of China (11072191); Scientific Research Program Funded by Shaanxi Provincial Education Department (12JK0657) ; Specialized Research Fund for the Doctoral Program of Higher Education（20136121110001）

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    摘要:

    采用高濃度的CaHPO4和Ca(H2PO4)2溶液對(duì)鎳鈦合金進(jìn)行一步水熱處理，以進(jìn)行生物活性表面改性。經(jīng)過(guò)處理的試樣表面覆蓋的薄膜由細(xì)晶粒(~70 nm)和大顆粒(100-250 nm)組成。X射線光電子能譜分析表明試樣表面的鈦以TiO2形式存在，檢測(cè)不到鎳，鈣磷元素以磷酸鈣存在。處理試樣檢測(cè)到銳鈦礦TiO2和羥基磷灰石的X射線衍射峰。在無(wú)鈣Hank’s平衡鹽液中的動(dòng)電位極化實(shí)驗(yàn)表明，處理試樣的耐蝕性比拋光試樣大大提高。本文提供的一步法生物活性表面改性方法易于操作，處理溫度低，腐蝕性低，可用于生物醫(yī)用多孔鎳鈦合金的表面改性。

    Abstract:

    NiTi alloy was subjected to one-step hydrothermal treatment in the concentrated CaHPO4 and Ca(H2PO4)2 solutions for bioactive surface modification. The treated samples are covered by films composed of fine grains (~70 nm) and large particles (100-250 nm). XPS analysis shows that Ti at the surface presents as TiO2, Ni is not detectable, and Ca and P are in the form of calcium phosphate. X-ray diffraction peaks of anatase TiO2 and hydroxyapatite are present for the treated samples. Potentiodynamic polarization test in a Ca-free Hank’s balanced solution reveals that the treated sample has markedly improved corrosion resistance compared with the polished sample. The present work would provide a one-step bioactive surface modification method that is easily-operated, low-temperatured, less corrosive, and potentially suitable for biomedical porous NiTi alloy.

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付濤.采用水熱方法在鎳鈦合金表面一步合成TiO2-羥基磷灰石納米薄膜[J].稀有金屬材料與工程,2016,45(5):1128~1131.[Fu Tao. One-step Synthesis of TiO2-hydroxyapatite Nano-films on NiTi alloy by a Hydrothermal Method[J]. Rare Metal Materials and Engineering,2016,45(5):1128~1131.]
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  • 收稿日期:2014-03-25
  • 最后修改日期:2014-09-11
  • 錄用日期:2015-11-18
  • 在線發(fā)布日期: 2016-06-02
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