采用纳秒激光在纯钛片表面制备微织构,并辅助化学处理的方法,获得了类似“荷叶效应”且润湿稳定的超疏水表面。通过调整激光加工工艺参数,获得了具有不同润湿性的微纳米结构;在此基础上,采用全氟癸基三甲氧基硅烷和乙醇溶液的混合溶液在微结构表面制备涂层。采用扫描电子显微镜和能谱分析后可知钛板在激光作用下产生了多尺度的氧化钛多孔微结构;通过接触角测量表征进一步分析了钛片表面的亲水性与微纳米结构表面变化规律的关系,以及涂层对表面润湿性的影响,为生物医学药物输送方面的研究提供了参考。

The superhydrophobic surface of titanium alloys with stable wettability is obtained by fabricating a microtexture on a titanium (Ti) alloy surface with a nanosecond laser and assisted with chemical treatment, and it exhibits properties similar to the “lotus effect”. Adjusting the laser processing parameters enables the production of micro/nanostructures with different surface wettabilities. On this basis, the titanium alloy surface is coated with a mixture of 1H,1H,2H,2H-perfluorodecyltrimethoxysilane and ethanol solution. Scanning electron microscopy and energy spectrum analysis show that laser irradiation can induce the formation of multiscale porous Ti oxide microstructures in Ti alloys. The relationship between hydrophilicity of the Ti metal surface and micro/nanostructure surface change as well as the coating effect on the surface wettability are further investigated by evaluating the contact angle. This study can pave the road for applications in biomedical drug delivery.