Experimental Observation of Droplet Impact Dynamics on Superhydrophobic Elastic Membranes
DOI:
https://doi.org/10.2026/d3rfnt95Abstract
This experimental study investigates the impact dynamics of water droplets on superhydrophobic elastic membranes, revealing that substrate flexibility significantly enhances droplet retraction and reduces contact time through elastic energy storage and release mechanisms. Using ultrafast imaging and force sensing across varied impact velocities, membrane elastic moduli, and droplet parameters, we demonstrate a nonlinear decrease in contact time with increasing velocity, culminating in droplet scattering beyond a critical threshold. The flexible membranes promote springboard-like lift-off, converting stored elastic energy into vertical momentum, unlike rigid surfaces. These findings establish design principles for advanced self-cleaning, anti-icing, and water-harvesting surfaces where mechanical compliance governs dynamic wetting behavior.
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