采取溶胶-凝胶法制备了 TiO 2与 SiO 2的前驱溶液.并利用 SiO 2薄膜固有的多孔特性，在普通载玻片上以 SiO 2为模板成功制得了具有较大粗糙度以及多孔特性的多层 TiO 2薄膜，其表面粗糙度亦达到14．7 nm；利用热重-差热分析仪(TGA-DSC)对 TiO 2溶胶进行分析；采用 X 射线衍射仪(XRD)、扫描探针显微镜(CSPM)和扫描电镜(SEM)对薄膜的结构与形貌进行了表征.并考察了不同层数 TiO 2薄膜性能的差异，实验结果表明，未预涂 SiO 2的 TiO 2膜表面光滑平整，而预涂了 SiO 2的 TiO 2表面呈现出均匀的微孔结构.前者在避光6 h 后完全失去超亲水性；而预涂1层SiO 2的 TiO 2薄膜在经过30 h 避光处理后，接触角依然小于10°，其中两层 TiO 2薄膜接触角仅为6．7°，润湿性得到了很好的保持.
The precursor solution of titanium dioxide and silicon dioxide was maded by sol-gel.The multilayer TiO 2 thin films with large roughness and porous properties were completed on the normal slide by pre-coating multihole SiO 2 ,and the surface roughness of TiO 2 was 14.7 nm.The solution of TiO 2 was investigated by TGA-DSC,the structure and surface morphology of TiO 2 films were characterized by X-ray diffraction and scanning electron microscope,scanning probe microscope.The experimental results revealed that the surface of TiO 2 films non-precoated SiO 2 were smooth,and the others were poly-porous.In the super-hydrophilicity test keeping in the dark,the former was out of super-hydrophilic after 6 h,while the contact angle of TiO 2 films precoated SiO 2 kept under 10°after 30 h.Among the films precoated SiO 2 ,two layers of TiO 2 films showed the excellent property,the contact angle was only 6.7°.
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