Droplet mobility on lubricant-impregnated surfaces
Name
McKinley_Droplet mobility.pdf
Size
2.61 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Dhiman, Rajeev
Anand, Sushant
Reza-Garduno, Ernesto
Cohen, Robert E.
McKinley, Gareth H.
Varanasi, Kripa K
Smith, Jonathan David, S.M. Massachusetts Institute of Technology
Date Issued
December 2012
Journal
Soft Matter
Publisher
Royal Society of Chemistry, The
Citation
Smith, J. David et al. “Droplet Mobility on Lubricant-impregnated Surfaces.” Soft Matter 9.6 (2013): 1772.
Version
Author's final manuscript
Abstract
Non-wetting surfaces containing micro/nanotextures impregnated with lubricating liquids have recently been shown to exhibit superior non-wetting performance compared to superhydrophobic surfaces that rely on stable air–liquid interfaces. Here we examine the fundamental physico-chemical hydrodynamics that arise when droplets, immiscible with the lubricant, are placed on and allowed to move along these surfaces. We find that these four-phase systems show novel contact line morphology comprising a finite annular ridge of the lubricant pulled above the surface texture and consequently as many as three distinct 3-phase contact lines. We show that these distinct morphologies not only govern the contact line pinning that controls droplets' initial resistance to movement but also the level of viscous dissipation and hence their sliding velocity once the droplets begin to move.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Laboratory for Manufacturing and Productivity
Massachusetts Institute of Technology. School of Engineering
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike 3.0
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1039/C2SM27032C
