利用阳极氧化法在TA1基底上制备了不同形貌的TiO2纳米薄膜。通过改变其氧化参数来控制薄膜的微观形貌,再在薄膜表面修饰低表面能物质以控制其表面能,制备出超亲水、亲水、疏水及超疏水表面,分析了影响表面润湿性的因素,材料表面微纳结构及表面能量共同决定固体表面的润湿性,在高能表面制备微纳结构则显示超亲水性,在低能表面制备微纳结构则表现超疏水性。实验表明,通过改变阳极氧化参数和表面修饰氟硅烷的方法控制TiO2表面的润湿性简单方便可行。
Three types of TiO2 nano films with different nano structures were prepared on TA1 substrate using electrochemical anodization. To control the micro/nano structure of TiO2 film, anodization parameters were studied. To change surface energy, fluorinated silane self-assembled film was synthesized on TiO2 film. Super-hydrophilicity, hydrophilicity,hydrophobic and super-hydropbobic surfaces were prepared. The results show that, both nano-structures and surface energy have played an important role in the wettability. Micro/nano structure on high energy surface will show super-hydrophilicity, while micro/nano structure on low energy surface will show super-hydrophobic. The experiment resluts show that the method of electrochemical anodization combined with modified with fluorinated silane self-assembled film is a simple convenient and practical method for controlling the wettability of TA1 surface.