Sliding of water droplets on micropillar-structured superhydrophobic surfaces
Sliding of water droplets on micropillar-structured superhydrophobic surfaces
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DOI：
10.1016/j.apsusc.2019.144493
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发表时间：
2020-02
影响因子：
6.7
通讯作者：
Chun-Wei Yao;Sirui Tang;Divine Sebastian;R. Tadmor
中科院分区：
文献类型：
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作者：
Chun-Wei Yao;Sirui Tang;Divine Sebastian;R. Tadmor
了解水滴从微柱结构的超疏水表面脱离的具体行为在各种潜在的应用中是至关重要的。本文研究了水滴在三种不同微柱结构的超疏水表面上的滑动行为。通过倾斜板实验和保持力测量，探讨了不同体积水滴的运动规律。研究了液滴尺寸和接触角滞后对滚动角的影响。此外，还提出了三种不同的模型来估计滚动角。基于侧向保持力的模型与滚动角的测量结果吻合较好，另外两个基于接触角滞后的模型反映了滚动角的变化趋势。
Understanding the specific behavior of water droplet detachment from a micropillar-structured superhydrophobic surface is essential in a variety of potential applications. Herein, the sliding behavior of water droplets on three different micropillar-structured superhydrophobic surfaces was studied. From tilting plate experiments and retention force measurements, we probed the motion of water droplets with different volumes. The effects of droplet sizes and contact angle hysteresis on the roll-off angle were also investigated. Furthermore, three different models are proposed to estimate a roll-off angle. The lateral retention force-based model agrees well with the roll-off angle measurements, and the other two contact angle hysteresis-based models capture the trend in the variation of the roll-off angle.