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通过阳极氧化处理技术在钛表面制备出具有不同粗糙度和亲水性的纳米表面。采用扫描电镜观察表面特征,原子力显微镜检测表面粗糙度,接触角仪测量亲水性。实验结果表明,表面形貌随着氧化电压和时间的改变有较大变化。在优化的电解液和氧化条件下,可以在钛表面制备规则排列的纳米管阵列。粗糙度随着氧化时间的延长而增大,在几十到几百纳米之间变化,而氧化电压对粗糙度的影响不大。表面亲水性随着氧化时间的延长先增加再降低。钛表面结构形貌、粗糙度与亲水性的变化可用阳极氧化过程中表面发生的反应进行解释。
The surface of titanium with different roughness and hydrophilicity was prepared by anodic oxidation. Surface characteristics were observed by scanning electron microscopy, surface roughness was measured by atomic force microscopy, and hydrophilicity was measured by a contact angle meter. The experimental results show that the surface morphology changes greatly with the change of oxidation voltage and time. Regular arrays of nanotubes can be prepared on titanium surfaces with optimized electrolyte and oxidation conditions. Roughness increases with the extension of oxidation time and varies from several tens to several hundred nanometers. The effect of oxidation voltage on roughness is not significant. The surface hydrophilicity increases first and then decreases with the extension of oxidation time. The changes in the surface topography, roughness and hydrophilicity of titanium can be explained by the surface reactions that occur during the anodization.