制备及其血液相容性
( 1. 辽宁工学院 材料与化学工程学院， 锦州 121001;
2. Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, China)
摘 要: 采用溶胶-凝胶法在NiTi合金表面制备了TiO2薄膜， 用DSC分析了凝胶在加热过程中发生的转变。 结果表明： 在NiTi表面形成金红石型TiO2薄膜； 覆盖有TiO2薄膜的NiTi合金与NiTi基体及316L不锈钢、 Ti6Al4V相比， 凝血时间延长， 溶血率下降， 说明TiO2膜可提高NiTi合金血液相容性。
关键字: NiTi; 溶血； 凝血; TiO2
NiTi shape memory alloy
（ 1. School of Materials & Chemical Engineering,
Liaoning Institute of Technology, Jinzhou 121001, China;
2. Department of Applied Physics,
Hong Kong Polytechnic University, Hong Kong, China）
Abstract: TiO2 film was coated on the surface of NiTi alloys by sol-gel method. The variations of gel on heating were analyzed by DSC. The X-ray diffraction results indicate that TiO2 film formed on NiTi alloy is rutile. Compared with uncoated NiTi, 316L stainless steel and Ti6Al4V, TiO2-coated NiTi exhibits excellent hemocompatibility, such as lower hemolysis rate and longer clotting time.
Key words: NiTi; hemolysis; clotting; TiO2
