Mechanically switchable wetting on wrinkled elastomers with dual-scale roughness
Mechanically switchable wetting on wrinkled elastomers with dual-scale roughness
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DOI：
10.1039/b814145b
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发表时间：
2009-01-01
期刊：
影响因子：
3.4
通讯作者：
Yang, Shu
中科院分区：
文献类型：
--
作者：
Lin, Pei-Chun;Yang, Shu
我们报道了一种新的超疏水表面的制造与双尺度粗糙度通过涂覆二氧化硅纳米粒子的聚（二甲基硅氧烷）（PDMS）弹性体双层膜与微尺度波纹。表面的润湿行为可以通过施加机械应变来可逆地调节，该机械应变引起由波纹确定的微尺度粗糙度的变化。双尺度粗糙度促进了最终双结构表面从Wenzel区域到Cassie区域的润湿过渡，因此，与具有单尺度粗糙度的表面（来自纳米颗粒膜或褶皱的PDMS膜）相比，滑动角减小至少三倍。此外，三倍和快速响应的滑动角的可调性，通过施加机械应变在这个双粗糙度表面上被证明。
We report the fabrication of a new superhydrophobic surface with dual-scale roughness by coating silica nanoparticles on a poly(dimethylsiloxane) (PDMS) elastomer bilayer film with micro-scaled ripples. The wetting behavior of the surface can be reversibly tuned by applying a mechanical strain, which induces the change in micro-scale roughness determined by the ripples. The dual-scale roughness promotes the wetting transition of the final dual-structure surface from Wenzel region into the Cassie region, thus, reducing the sliding angle at least three times in comparison to that from the surfaces with single-scale roughness (either from the nanoparticle film or the wrinkled PDMS film). In addition, three-times and fast-response tunability of the sliding angle by applying mechanical strain on this dual-roughness surface is demonstrated.