2025-03-12 ロイヤルメルボルン工科大学 (RMIT)
The team measured the electrical charge and contact areas created by water droplets spreading and contracting on a flat plate of Teflon – effectively simulating the movement of droplets over the surface. Credit: Peter Clarke, RMIT University
＜関連情報＞
- https://www.rmit.edu.au/news/all-news/2025/mar/water-charging
- https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.134.104002
高分子表面上の液滴の脱滴によるエネルギー散逸が引き起こす不可逆的帯電 Irreversible Charging Caused by Energy Dissipation from Depinning of Droplets on Polymer Surfaces
Shuaijia Chen Ronald T. Leon, Rahmat Qambari, Yan Yan, Menghan Chen, Peter C. Sherrell, Amanda V. Ellis, and Joseph D. Berry
Physical Review Letters Published: 11 March, 2025
DOI:https://doi.org/10.1103/PhysRevLett.134.104002
Abstract
Interfacial energy dissipation during stick-slip motion of a liquid drop on a nonconductive polymer substrate is shown to lead to an irreversible increase in electrical charge. This previously unobserved phenomenon occurs during surface wetting, in contrast to the previously reported charge separation mechanism that occurs during dewetting. Understanding this electrification mechanism will facilitate the design of energy harvesters and aid the development of risk mitigation strategies for electrostatic buildup in liquid flow across a wide range of industrial applications.
