Multifunctional superhydrophobic surface with dynamically controllable micro/nanostructures for droplet manipulation and friction control
Multifunctional superhydrophobic surface with dynamically controllable micro/nanostructures for droplet manipulation and friction control
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DOI：
10.1016/j.cej.2020.127944
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发表时间：
2020-12
影响因子：
15.1
通讯作者：
Wang Hujun;Zhihui Zhang;Jing Zheng;Jie Zhao;Yunhong Liang;Xiujuan Li;L. Ren
中科院分区：
文献类型：
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作者：
Wang Hujun;Zhihui Zhang;Jing Zheng;Jie Zhao;Yunhong Liang;Xiujuan Li;L. Ren
具有结构依赖性可切换润湿性的超疏水表面由于其在液滴操作、可重写液体模式、摩擦控制等方面的特殊应用，近年来引起了人们的广泛关注。然而，开发具有多种功能的可调超疏水表面仍然是一个巨大的挑战，包括通过简单的策略来控制摩擦。在这里，我们应用模板方法来制造可切换的超疏水表面，该表面可以通过动态控制微/纳米结构的形态在高粘附超疏水和疏水状态之间可逆过渡。值得注意的是，由于微纳米结构和润湿性的动态可控，超疏水表面表现出多种功能。不同润湿状态下的超疏水表面可以作为液滴捕获器或反应平台，实现对液滴的操控。此外，超疏水表面的摩擦系数可以在 ~ 0.4和 ~ 0.13之间切换，显示了在摩擦控制方面的应用潜力。这项工作为微/纳米结构形态和润湿行为的动态可控提供了一个有前途的多功能超疏水平台，用于液滴操纵和摩擦控制。
Superhydrophobic surfaces with structure-dependent switchable wettability have recently drawn considerable attention due to their special applications in droplet manipulation, rewritable liquid patterns, friction control, etc. However, it still remains a great challenge for developing tunable superhydrophobic surfaces with multiple functions including friction control through a facile strategy. Here, we apply a templating approach to fabricate switchable superhydrophobic surfaces that can reversibly transit between high-adhesion superhydrophobic and hydrophobic states by dynamically controlling the morphology of the micro/nanostructures. Notably, due to the dynamically controllable micro/nanostructures and wettability, the superhydrophobic surface shows multiple functions. The superhydrophobic surface under different wetting states can serve as a droplet capturer or reaction platform to achieve droplet manipulation. Moreover, the friction coefficient of the superhydrophobic surface can be switched between ∼ 0.4 and ∼ 0.13, demonstrating the application potential in friction control. This work offers a promising multifunctional superhydrophobic platform with dynamically controllable morphology of micro/nanostructures and wetting behaviors for the applications of droplet manipulation and friction control.