Gong Zheng, Su Zhenpeng, Liu Xiaofeng, Pan Di, Liu Jie, Zheng Huai, Joo Sang Woo
School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China.
The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China.
Langmuir. 2021 Jan 12;37(1):400-405. doi: 10.1021/acs.langmuir.0c03048. Epub 2020 Dec 24.
Controllable liquid transportation is of great value in various practical applications. Here, we experimentally demonstrate a method of actuating high-speed droplet transport with large manipulation controllability on lubricated surfaces using a corona discharge generated by a simple needle-plate electrode configuration. Linear motion of droplets is realized with a maximum velocity of 30 mm/s. Factors affecting the velocity of these droplets are analyzed systematically, and the mechanism of droplet transport is explained. The lubrication film flow induced by charge deposition is shown to be the dominating factor in the droplet manipulation controllability. The new method presented here opens a new path of high-performance manipulation of liquid droplets by controlling the lubrication liquid film flow with charge deposition.
可控液体传输在各种实际应用中具有重要价值。在此，我们通过实验展示了一种利用简单针板电极配置产生的电晕放电，在润滑表面上实现对高速液滴传输进行大操作可控性驱动的方法。液滴的直线运动得以实现，最大速度为30毫米/秒。系统地分析了影响这些液滴速度的因素，并解释了液滴传输的机制。结果表明，电荷沉积引起的润滑膜流动是液滴操作可控性的主导因素。本文提出的新方法通过利用电荷沉积控制润滑液膜流动，为高性能操纵液滴开辟了一条新途径。
