Superoleophobic Surfaces through Control of Sprayed-on Stochastic Topography
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McKinley_Superoleophobic surface.pdf
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Author(s)
Campos, Raymond
Guenthner, Andrew J.
Meuler, Adam J.
Tuteja, Anish
Cohen, Robert E.
McKinley, Gareth H.
Haddad, Timothy S.
Mabry, Joseph M.
Date Issued
May 2012
Journal
Langmuir
Publisher
American Chemical Society (ACS)
Citation
Campos, Raymond, Andrew J. Guenthner, Adam J. Meuler, Anish Tuteja, Robert E. Cohen, Gareth H. McKinley, Timothy S. Haddad, and Joseph M. Mabry. Superoleophobic Surfaces Through Control of Sprayed-on Stochastic Topography. Langmuir 28, no. 25 (June 26, 2012): 9834-9841.
Version
Author's final manuscript
Abstract
The liquid repellency and surface topography characteristics of coatings comprising a sprayed-on mixture of fluoroalkyl-functional precipitated silica and a fluoropolymer binder were examined using contact and sliding angle analysis, electron microscopy, and image analysis for determination of fractal dimensionality. The coatings proved to be an especially useful class of liquid repellent materials due to their combination of simple and scalable deposition process, low surface energy, and the roughness characteristics of the aggregates. These characteristics interact in a unique way to prevent the buildup of binder in interstitial regions, preserving re-entrant curvature across multiple length scales, thereby enabling a wide range of liquid repellency, including superoleophobicity. In addition, rather than accumulating in the interstices, the binder becomes widely distributed across the surface of the aggregates, enabling a mechanism in which a simple shortage or excess of binder controls the extent of coating roughness at very small length scales, thereby controlling the extent of liquid repellence.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Mechanical Engineering
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DOI of Published Version
https://doi.org/10.1021/la301480s
