摘要
用溶胶-凝胶法在316L不锈钢及NiTi合金基片上制备含SrFe12O19磁性粉末的TiO2薄膜,磁化后在材料表面建立微磁场。用透射电镜(TEM)分析磁性粉末的尺寸及形貌,并用X射线(XRD)、粗糙度仪对薄膜的成份及表面粗糙度进行分析。腐蚀实验表明,含磁粉的TiO2薄膜能够减少金属材料受到体液的腐蚀,阻止毒性镍离子等的析出。动态凝血时间和溶血率的测定结果表明,用含磁粉的TiO2薄膜产生的微磁场可使316L不锈钢和NiTi合金动态凝血时间延长,溶血率下降,说明试样表面的微磁场使材料具有较好的血液相溶性。
TiO2 film containing SrFe12O19 was coated on the surface of NiTi alloy and 316L stainless steel. After magnetization, micromagnetic field was established on it. The surface morphology and structure of SrFe12O19 were studied by TEM. The component and the roughness of film were studied by XRD and surface roughness measuring instrument. The result of corrosion experiment showed that TiO2 film containing SrFe12O19 displayed certain resistance to corrosion by SBF and prevented toxic Ni ion release from the metal surface. Blood compatibility of the film was evaluated by dynamic clotting time and hemolysis rate tests. Experimental results showed that dynamic clotting time of 316L stainless steel and NiTi alloy was increased with TiO2 film containing SrFe12O19, and hemolysis rate was decreased, which indicated the improved blood compatibility of TiO2 film contained SrFe12O19 .
出处
《中国生物医学工程学报》
CAS
CSCD
北大核心
2008年第3期462-467,共6页
Chinese Journal of Biomedical Engineering
基金
江苏省高校自然科学研究计划资助项目(04KJB430025)
