Oblique pancake bouncing
Oblique pancake bouncing
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DOI：
10.1016/j.xcrp.2021.100721
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发表时间：
2022-01
影响因子：
8.9
通讯作者：
Ran Tao;Guoqiang Liang;Binhong Dou;Jun Wu;Bing Li;Chonglei Hao
中科院分区：
文献类型：
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作者：
Ran Tao;Guoqiang Liang;Binhong Dou;Jun Wu;Bing Li;Chonglei Hao
尽管在接近固液接触时间的理论极限方面进行了大量的努力，但垂直弹跳的液滴最终落在水平放置的表面的撞击点上，这使得液体去除效率低下，从而限制了其实际应用。为了解决这一挑战，我们使用由具有倾斜Janus结构的规则图案化柱组成的超疏水表面，并报告了一种现象，该现象涉及在一个弹跳周期中的煎饼反弹和定向运输的协同效应，有助于减少接触时间和同时横向去除撞击液滴。我们将这种特殊的制度推广到各种热条件和冲击速度的广泛的工作环境中，展示了防水性和液体运动方向性的鲁棒性。不寻常的弹跳性能，一般性和实用性，我们的工作可能会提供有用的见解，各种应用，包括发电，自清洁，除雾，防冰。
Despite extensive efforts in approaching the theoretical limit of solid-liquid contact time, the vertical bouncing droplet eventually lands on the impact spot of horizontally placed surfaces, which makes the liquid removal inefficient and thus limits its practical applications. To address this challenge, we use superhydrophobic surfaces consisting of regularly patterned pillars with an inclined Janus structure and report a phenomenon that involves synergistic effects of both pancake rebound and directional transport in one bouncing cycle, contributing to the reduction of contact time and the lateral removal of impacting droplets simultaneously. We generalize this particular regime to a broad range of working environments with various thermal conditions and impact velocities, demonstrating the robustness of water repellency and the directionality of liquid motion. The unusual bouncing performance, generality, and practicability of our work may provide useful insights into various applications, including electricity generation, self-cleaning, defogging, and anti-icing.