UV/thermally driven rewritable wettability patterns on TiO2-PDMS composite films.
UV/thermally driven rewritable wettability patterns on TiO2-PDMS composite films.
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DOI：
10.1021/am1005207
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发表时间：
2010-08
影响因子：
9.5
通讯作者：
K. Nakata;H. Kimura;M. Sakai;T. Ochiai;H. Sakai;T. Murakami;M. Abe;A. Fujishima
中科院分区：
文献类型：
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作者：
K. Nakata;H. Kimura;M. Sakai;T. Ochiai;H. Sakai;T. Murakami;M. Abe;A. Fujishima
采用溶胶-凝胶法制备TiO2与聚二甲基硅氧烷（PDMS）复合薄膜，经紫外线照射固化，再经热水处理使薄膜中的TiO2结晶。锐钛矿TiO2的存在有助于薄膜在紫外线照射下的光致超亲水性。接触角研究表明，TiO2-PDMS复合膜恢复了原来的疏水状态。在膜上成功地形成了疏水-超亲水模式。润湿性图案可以通过紫外线照射和热处理消除。新的润湿性模式可以重建，表明薄膜具有可重写的润湿性，而不需要有机化学品。
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.