Elasticity and damping ratio measurement of droplets on super-hydrophobic surfaces

Sun, Yukai and Zheng, Yelong and Song, Le and Sun, Peiyuan and Zhao, Meirong and Zhou, Yixiong and Tee, Clarence Augustine Th (2022) Elasticity and damping ratio measurement of droplets on super-hydrophobic surfaces. Royal Society Open Science, 9 (1). ISSN 2054-5703, DOI https://doi.org/10.1098/rsos.211632.

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The measurement of the droplets' elasticity is vitally important in microfluidic and ink-jet printing. It refers to the ability of the droplet to restore its original shape and strong robustness. This study investigated a novel method to measure elasticity. The plate coated with super-hydrophobic layers pressed on a droplet and the elastic force was recorded by an electronic balance. Meanwhile, a mathematical model was constructed to calculate the changes of the droplet area under the force. The measurement showed that external work mainly converts into surface energy and the damping ratio increases from 0.068 to 0.261 with the increase of mass fraction from 0 to 80 wt%. It also indicates that the novel method can accurately and efficiently measure the elasticity of droplets.

Item Type: Article
Funders: National Natural Science Foundation of China (NSFC) [Grant No: 52075384 & 51805367]
Uncontrolled Keywords: Elasticity; Damping ratio; Super-hydrophobic surfaces; Robustness; Viscosity
Subjects: Q Science > Q Science (General)
T Technology > T Technology (General)
Divisions: Faculty of Engineering > Department of Electrical Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 02 Aug 2022 02:03
Last Modified: 02 Aug 2022 02:03
URI: http://eprints.um.edu.my/id/eprint/33484

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