Evaporative Crystallization in Drops on Superhydrophobic and Liquid-Impregnated Surfaces
Name
EvaporativeCrystallizationLangmuir.pdf
Description
Accepted version
Size
2.39 MB
Format
Adobe PDF
Checksum (MD5)
29f41adcc5014fce70f4d90282798693
Author(s)
McBride, Samantha Ann
Dash, Susmita
Varanasi, Kripa
Date Issued
April 2018
Journal
Langmuir
Publisher
American Chemical Society (ACS)
Citation
McBride, Samantha A. et al. "Evaporative Crystallization in Drops on Superhydrophobic and Liquid-Impregnated Surfaces." Langmuir 34, 41 (April 2018): 12350–12358. © 2018 American Chemical Society
Version
Author's final manuscript
Abstract
Mineral-fouling induced corrosion and deterioration of marine vessels, aircraft, and coastal structures is due in part from structural intrusion of crystals grown from ocean-generated saline drops. As such, much work has explored surface treatments that induce hydrophobicity or introduce barriers for antifouling and corrosion prevention; however, the efficacy of these strategies will be altered by the underlying substrate texture. Here, we study the behavior of evaporating saline drops on superhydrophobic and liquid-impregnated surfaces as a function of surface texture. On superhydrophobic surfaces, four disparate regimes (which are not observed for particle-laden drops) emerge as a function of the substrate solid fraction: Cassie-pinning, Cassie-gliding, Cassie-Wenzel transition, and Wenzel. These regimes control the morphology of the resultant crystal deposits. In contrast to the superhydrophobic surfaces, spreading liquid-impregnated surfaces demonstrate minimal influence of solid fraction on evaporative crystallization. The area, area localization, timescale of evaporation, and deposit morphology are all normalized by the presence of the lubricating layer, thus introducing an efficient method of eliminating crystal "coffee rings" as well as reducing the potential for fouling and corrosion.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1021/acs.langmuir.8b00049
