A transparent electrowetting-on-dielectric device driven by triboelectric nanogenerator for extremly fast anti-fogging
A transparent electrowetting-on-dielectric device driven by triboelectric nanogenerator for extremly fast anti-fogging
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由摩擦纳米发电机驱动的透明电介质电润湿装置，可实现极快的防雾
DOI：
10.1016/j.nanoen.2021.106697
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发表时间：
2021
期刊：
影响因子：
17.6
通讯作者：
Minyi Xu
中科院分区：
文献类型：
--
作者：
Jie Tan;Penghao Tian;Mingyang Sun;Hongchen Wang;Nuo Sun;Guijun Chen;Yongchen Song;Dongyue Jiang;Hui Jiang;Minyi Xu
雾化广泛存在于工业过程、外科治疗和人类日常生活中。由于透过率降低，雾化会导致不良影响，甚至是灾难。传统的防雾方法存在能耗大、对污染敏感等局限性。提出了一种利用旋转独立式摩擦电纳米发电机(RF-TENG)将任意机械能转化为电能来驱动电介质润湿(EWOD)装置实现防雾的方法。通过改变输入机械能的接触面积和转速，RF-Teng可以产生不同的开路电压(0.73-5.26千伏)和频率(20-100千伏)。利用高速相机捕捉到雾滴的汇聚和脱落过程，揭示了雾滴在EWOD装置上的振荡和横向运动是产生防雾现象的主要原因。讨论了开路电压和频率对防雾性能的影响。实验结果表明，当开路电压大于±1千伏，频率大于60赫兹时，能够在很短的时间内实现从34%到98%的大的干燥面积分数(<；0.5，S)。最后，给出了利用RF-TENG进行窗户防雾的实际应用。结果表明，EWOD玻璃具有良好的可见光透过率，仅比普通玻璃低3%。本研究为利用可再生机械能(如风)进行室内防雾奠定了基础。
Fogging widely occurs in industrial processes, surgical treatment, and human daily lives. Due to the reduction in transmittance, fogging induces adverse effects or even disaster. Traditional anti-fogging methods face the limitations of large energy consumption and sensitive to contamination. This paper proposes a method of using rotating freestanding triboelectric nanogenerator (RF-TENG) which is capable of converting arbitrary mechanical energy into electricity to drive an electrowetting-on-dielectric (EWOD) device to achieve anti-fogging. The RF-TENG could generate variable open-circuit voltage (0.73–5.26 kV) and frequency (20–100 Hz) by changing the contact area and the rotating speed of the input mechanical energy. The fog droplets coalescence and shedding processes were captured by a high-speed camera, revealing that the droplet oscillation and lateral movement on the EWOD device mainly contribute to the anti-fogging phenomenon. The effects of open-circuit voltage and frequency of the RF-TENG on anti-fogging performance are discussed. The experimental results show that when the open-circuit voltage is greater than ± 1 kV and a frequency larger than 60 Hz is able to achieve a large dry area fraction from 34% to 98% in a very short time (< 0.5 s). Finally, a practical application of using a RF-TENG for window glass anti-fogging was achieved. The results indicate that the EWOD glass show a good visible light transmittance, only 3% lower than the ordinary glass. This study paves a way for utilizing the renewable mechanical energy (e.g.wind) for indoor anti-fogging.