A Periodic Wetting Surface Driven by Triboelectric Nanogenerator for Efficient Postimpact Droplet Collection
A Periodic Wetting Surface Driven by Triboelectric Nanogenerator for Efficient Postimpact Droplet Collection
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由摩擦纳米发电机驱动的周期性润湿表面，可有效收集撞击后的液滴
DOI：
10.1002/admi.202202037
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发表时间：
2022-11
影响因子：
5.4
通讯作者：
Dongyue Jiang
中科院分区：
文献类型：
--
作者：
Jie Tan;Zeng Fan;Shulan Sun;Minyi Xu;Dongyue Jiang
液滴撞击现象广泛存在于自然界和工业过程中。无论表面的固有润湿性(疏水、亲水和超疏水)如何，接触后的液滴都倾向于反弹或飞溅。液滴的碰撞动力学已经得到了很好的研究，但如何抑制碰撞后液滴的反弹或飞溅还需要进一步探索。本文提出了一种由摩擦电纳米发电机(TENG)驱动的周期性润湿表面(PWS)，用于高效地收集接触后的液滴。利用旋转独立式摩擦电纳米发电机(RF-TENG)产生的高压电信号，可以周期性地改变叉指电极上电介质润湿(EWOD)表面的润湿性。液滴对PWS的撞击表现为振荡滑动运动，补偿了液滴反弹或飞溅的动能。与纯疏水或亲水表面相比，PWS显示出最好的液滴收集性能。讨论了开路电压(0.44-3.00千伏)、频率(0-60赫兹)等电信号和离子类型、液滴浓度等液滴含量对触点后液滴收集效率的影响。最后，以Teng驱动PWS为例，展示了其在实时高效采集多个碰撞后液滴中的实际应用。
The phenomenon of droplet impact is widely observed in nature and industrial processes. No matter the intrinsic wettability (hydrophobic, hydrophilic, and superhydrophobic) of the surface, the postimpact droplets tend to rebound or splash. The droplet impact dynamics have been well investigated but the inhibition of the rebounding or splashing of the postimpact droplet requires further exploration. This paper proposes a periodic wetting surface (PWS) driven by a triboelectric nanogenerator (TENG) for efficient postimpact droplet collection. With the high‐voltage electric signal generated from a rotating freestanding triboelectric nanogenerator (RF‐TENG), the wettability of an interdigital electrodes‐based electrowetting‐on‐dielectric (EWOD) surface can be changed periodically. The droplet impacts on the PWS show oscillating sliding motion that compensates the kinetic energy for droplet rebounding or splashing. As compared to pure hydrophobic or hydrophilic surfaces, the PWS shows the best droplet collection performance. The effects of the electric signal of the RF‐TENG such as open‐circuit voltage (0.44–3.00 kV) and frequency (0–60 Hz), droplet contents such as ions type and concentration of the droplet on the postimpact droplet collection efficiency are discussed. Finally, a practical application is demonstrated by the TENG driven PWS for real‐time and high‐efficiency collection of multiple postimpact droplets.
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影响因子：
26.6
作者：
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影响因子：
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DOI：
10.1016/j.ijheatmasstransfer.2018.12.007
发表时间：
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影响因子：
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