Photocatalyst Group, Kanagawa Academy of Science and Technology, KSP Building West 614, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan.
ACS Appl Mater Interfaces. 2010 Sep;2(9):2485-8. doi: 10.1021/am1005207.
Composite films of TiO2 and polydimethylsiloxane (PDMS) are prepared by a sol-gel method, cured with UV irradiation, and then treated in hot water to crystallize the TiO2 in the film. The presence of anatase TiO2 contributes to the photoinduced superhydrophilicity of the film under UV irradiation. Contact angle studies reveal that the TiO2-PDMS composite film recovers its original hydrophobic state. Hydrophobic-superhydrophilic patterns are successfully formed on the films. The wettability patterns can be erased by UV irradiation and thermal treatment. New wettability patterns can be reconstructed, demonstrating that the film exhibits rewritable wettability without the need for organic chemicals.
采用溶胶-凝胶法制备 TiO2 和聚二甲基硅氧烷（PDMS）的复合薄膜，用紫外光固化，然后在热水中处理以在薄膜中结晶 TiO2。锐钛矿 TiO2 的存在有助于薄膜在紫外光照射下产生光致超亲水性。接触角研究表明，TiO2-PDMS 复合薄膜恢复其原始疏水性状态。在薄膜上成功形成了疏水-超亲水图案。润湿性图案可以通过紫外光照射和热处理擦除。可以重建新的润湿性图案，表明该薄膜具有无需使用有机化学品的可重写润湿性。
