Superhydrophobic PDMS surfaces with three-dimensional (3D) pattern-dependent controllable adhesion
Superhydrophobic PDMS surfaces with three-dimensional (3D) pattern-dependent controllable adhesion
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DOI：
10.1016/j.apsusc.2013.10.076
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发表时间：
2014
影响因子：
6.7
通讯作者：
Jiale Yong;Qing Yang;Feng Chen;Dongshi Zhang;G. Du;H. Bian;J. Si;F. Yun;X. Hou
中科院分区：
文献类型：
--
作者：
Jiale Yong;Qing Yang;Feng Chen;Dongshi Zhang;G. Du;H. Bian;J. Si;F. Yun;X. Hou
本文采用飞秒激光刻蚀技术制备了具有可控粘附力的三维图案结构超疏水PDMS表面。通过不同的激光功率与多层刻蚀方式相结合，可以制作出各种3D图案（例如，凸三角形阵列、圆形凹坑阵列、圆柱形阵列、凸菱形阵列和凹三角锥阵列）。通过设计不同的3D图案，可以将滑动角控制在1° ~ 90°之间（水滴被牢牢地固定在超疏水表面上，在任何倾斜角度下都没有任何运动），所制备的具有3D图案的表面显示出超疏水性和水可控粘附性，其范围从超低到极低。3D图案依赖的粘合剂性质归因于不同的接触模式。这项工作将为超疏水表面的粘附调节提供一个简单而有前途的策略。
In this paper, we demonstrate an effective approach for the three-dimensional (3D) pattern-structured superhydrophobic PDMS surfaces with controllable adhesion by using femtosecond laser etching method. By combining different laser power with a multi-layered etching way, various 3D patterns can be fabricated (for example, convex triangle array, round pit array, cylindrical array, convex rhombus array and concave triangle-cone array). The as-prepared surfaces with 3D patterns show superhydrophobic character and water controllable adhesion that range from ultralow to ultrahigh by designing different 3D patterns, on which the sliding angle can be controlled from 1° to 90° (the water droplet is firmly pinned on the superhydrophobic surface without any movement at any tilted angles). The 3D pattern-dependent adhesive property is attributed to the different contact modes. This work will provide a facile and promising strategy for the adhesion adjustment on superhydrophobic surfaces.