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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

医用金属表面溶胶-凝胶法和离子束合成TiO2薄膜的结构、性能比较

刘敬肖1,2; 杨大智1; 史非2; 蔡英骥2   

  1. 1. 大连理工大学材料系三束材料表面改性国家重点联合实验室, 大连 116024; 大连轻工业学院材料科学与工程系, 大连116034
  • 收稿日期:2001-06-22 修回日期:2001-08-16 出版日期:2002-07-20 网络出版日期:2002-07-20

Comparison of Structure and Properties of TiO2 Films Synthesized by Sol-Gel and Ion beam on Biomedical NiTi Alloy

LIU Jing-Xiao1,2; YANG Da-Zhi1; SHI Fei2; CAI Ying-Ji2   

  1. 1. Department of Materials Engineering; State Key Lab for Materials Modification by Laser; Ion; and Electron Beams; Dalian University of Technology; Dalian 116024; China; 2. Department of Materials Science and Engineering, Dalian Insitute of Light Industry, Dalian 116034, China
  • Received:2001-06-22 Revised:2001-08-16 Published:2002-07-20 Online:2002-07-20

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摘要： 采用溶胶-凝胶法和离子束增强沉积法在医用NiTi合金表面制备TiO2薄膜以提高其生物相容性.利用X射线衍射（XRD）、原子力显微镜（AFM）和X光电子能谱（XPS）对薄膜的结构、表面形貌及组成进行了比较研究;电化学腐蚀实验表明,两种方法制备的TiO2薄膜对金属基体均起到一种保护膜的作用,能够提高医用金属材料在模拟体液中的抗腐蚀性;对薄膜表面固定肝素抗凝血分子进行研究发现,溶胶-凝胶法制备的TiO2薄膜表面能够获得较好的肝素固定效果.

关键词: 溶胶-凝胶法, 离子束合成, TiO2薄膜, 肝素固定

Abstract: In order to improve the biocompatibility of NiTi alloy, TiO2 films were synthesized on the surface by sol-gel and Ion beam enhanced deposition (IBED) methods, respectively.
The structure, surface morphology and composition of the films were studied comparatively by X-ray diffraction (XRD), atomic force microscopy (AFM) and X-ray
photoelectron spectra (XPS). The electrochemical corrosion measurement showsthat the two kinds of TiO2 films both can improve the corrosion resistance
of metallic biomaterials in simulated body fluid as a protective layer on the surface. In order to further improve the anticoagulation of implants, immobilization
of heparin molecule on the film surface was also investigated. The results indicate that sol-gel-derived TiO2 film can obtain better heparin immobilization effects
than Ion beam derived TiO2 film.

Key words: sol-gel, IBED, TiO2 film, heparin immobilization

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