非晶型超疏水和超亲水TiO2薄膜的制备与表征

Fabrication and characterization of superhydrophobic and superhydrophilic non-crystal titanium oxide film

通过溶胶-凝胶法,以载玻片为基底制得非晶型纳米TiO2薄膜,用SEM、XPS、XRD和接触角测量仪研究了薄膜的微观形貌、表面元素、晶型结构及薄膜的疏水性,用Wenzel、Cassie理论对纳米TiO2薄膜的润湿性进行了理论分析。结果表明,经紫外光照射16h后,薄膜表面由超疏水性变为超亲水性,接触角接近0°。薄膜表面合适的粗糙度和低表面能材料表面修饰的协同作用使其表现出良好的超疏水性。

A non- crystal nanometer titanium oxide film was fabricated on the glass substrate with a method of sol-gel, SEM, XPS, XRD and contact angle meter were employed to characterize its surface morphologies, elements contained, crystal structure and wettability, respectively. The wettability of the film was discussed on the basis of Wenzel＇s and Cassie＇s theory. The results show that the film changes from superhydrophobicity to superhydrophilicity with a static contact angle of 0° after being irradiated under ultraviolet light for about 16 hours. The superhydrophobic properties are caused by the cooperation effect of appropriate surface roughness and surface modification of low surface energy material.