Sol-gel deposited TiO2 film on NiTi surgical alloy for biocompatibility improvement

被引:235
作者
Liu, JX [1 ]
Yang, DZ
Shi, F
Cai, YJ
机构
[1] Dalian Univ Technol, Key Natl Lab Mat Modificat Beams 3, Dept Mat Sci & Engn, Dalian 116024, Peoples R China
[2] Dalian Inst Light Ind, Dept Mat Sci & Engn, Dalian 116034, Peoples R China
基金
中国国家自然科学基金;
关键词
biomaterials; sol-gel process; titanium oxide; coatings;
D O I
10.1016/S0040-6090(03)00146-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
TiO2 thin films were prepared on NiTi surgical alloy by sol-gel method. The forming process, surface morphology and structure of the films were studied by X-ray diffraction and atomic force microscopy. The results showed that nm-scale TiO2 particles were embedded in the film of 205 nm thickness. The film existed mainly in the form of anatase, and the film was compact and smooth. The electrochemical corrosion measurement indicated that TiO2 thin film, as a protective layer, was effective for improving corrosion resistance of NiTi alloy. Additionally, in vitro blood compatibility of the film and NiTi alloy was evaluated by dynamic clotting time and blood platelets adhesion tests. The results showed that NiTi alloy coated with TiO2 film had improved blood compatibility (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:225 / 230
页数:6
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