Journal
LANGMUIR
Volume 29, Issue 14, Pages 4520-4524Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la304767t
Keywords
-
Funding
- Nanotechnology Advanced Technology Program at GE Global Research, the Department of Energy [DE-AC07-051D14517]
- National Science Foundation [1006764]
- Battelle Energy Alliance, LLC, with the U.S. Department of Energy [DE-AC07-051D14517]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1006764] Funding Source: National Science Foundation
Ask authors/readers for more resources
Droplet impact dynamics is vital to the understanding of several phase-change and heat-transfer phenomena. This work examines the role of substrate elasticity on the spreading and retraction behavior of water droplets impacting flat and textured superhydrophobic substrates. Experiments reveal that droplet retraction on flat surfaces decreases with decreasing substrate elasticity. This trend is confirmed through a careful measurement of droplet impact dynamics on multiple PDMS surfaces with varying elastic moduli and comparison with impact dynamics on hard silicon surfaces These findings reveal that surfaces tend to become more wettable upon droplet impact as the elastic modulus is decreased. First-order analyses are developed to explain this reduced retraction in terms of increased viscoelastic dissipation on soft substrates. Interestingly, superhydrophobic surfaces display substrate-elasticity-invariant impact dynamics. These findings are critical when designing polymeric surfaces for fluid-surface interaction applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available