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Wetting of Two-Component Drops: Marangoni Contraction Versus Autophobing

[Image: see text] The wetting properties of multicomponent liquids are crucial to numerous industrial applications. The mechanisms that determine the contact angles for such liquids remain poorly understood, with many intricacies arising due to complex physical phenomena, for example, due to the pre...

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Autores principales: Hack, Michiel A., Kwieciński, Wojciech, Ramírez-Soto, Olinka, Segers, Tim, Karpitschka, Stefan, Kooij, E. Stefan, Snoeijer, Jacco H.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8015233/
https://www.ncbi.nlm.nih.gov/pubmed/33734702
http://dx.doi.org/10.1021/acs.langmuir.0c03571
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author Hack, Michiel A.
Kwieciński, Wojciech
Ramírez-Soto, Olinka
Segers, Tim
Karpitschka, Stefan
Kooij, E. Stefan
Snoeijer, Jacco H.
author_facet Hack, Michiel A.
Kwieciński, Wojciech
Ramírez-Soto, Olinka
Segers, Tim
Karpitschka, Stefan
Kooij, E. Stefan
Snoeijer, Jacco H.
author_sort Hack, Michiel A.
collection PubMed
description [Image: see text] The wetting properties of multicomponent liquids are crucial to numerous industrial applications. The mechanisms that determine the contact angles for such liquids remain poorly understood, with many intricacies arising due to complex physical phenomena, for example, due to the presence of surfactants. Here, we consider two-component drops that consist of mixtures of vicinal alkanediols and water. These diols behave surfactant-like in water. However, the contact angles of such mixtures on solid substrates are surprisingly large. We experimentally reveal that the contact angle is determined by two separate mechanisms of completely different nature, namely, Marangoni contraction (hydrodynamic) and autophobing (molecular). The competition between these effects can even inhibit Marangoni contraction, highlighting the importance of molecular structures in physico-chemical hydrodynamics.
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spelling pubmed-80152332021-04-02 Wetting of Two-Component Drops: Marangoni Contraction Versus Autophobing Hack, Michiel A. Kwieciński, Wojciech Ramírez-Soto, Olinka Segers, Tim Karpitschka, Stefan Kooij, E. Stefan Snoeijer, Jacco H. Langmuir [Image: see text] The wetting properties of multicomponent liquids are crucial to numerous industrial applications. The mechanisms that determine the contact angles for such liquids remain poorly understood, with many intricacies arising due to complex physical phenomena, for example, due to the presence of surfactants. Here, we consider two-component drops that consist of mixtures of vicinal alkanediols and water. These diols behave surfactant-like in water. However, the contact angles of such mixtures on solid substrates are surprisingly large. We experimentally reveal that the contact angle is determined by two separate mechanisms of completely different nature, namely, Marangoni contraction (hydrodynamic) and autophobing (molecular). The competition between these effects can even inhibit Marangoni contraction, highlighting the importance of molecular structures in physico-chemical hydrodynamics. American Chemical Society 2021-03-18 2021-03-30 /pmc/articles/PMC8015233/ /pubmed/33734702 http://dx.doi.org/10.1021/acs.langmuir.0c03571 Text en © 2021 The Authors. Published by American Chemical Society Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Hack, Michiel A.
Kwieciński, Wojciech
Ramírez-Soto, Olinka
Segers, Tim
Karpitschka, Stefan
Kooij, E. Stefan
Snoeijer, Jacco H.
Wetting of Two-Component Drops: Marangoni Contraction Versus Autophobing
title Wetting of Two-Component Drops: Marangoni Contraction Versus Autophobing
title_full Wetting of Two-Component Drops: Marangoni Contraction Versus Autophobing
title_fullStr Wetting of Two-Component Drops: Marangoni Contraction Versus Autophobing
title_full_unstemmed Wetting of Two-Component Drops: Marangoni Contraction Versus Autophobing
title_short Wetting of Two-Component Drops: Marangoni Contraction Versus Autophobing
title_sort wetting of two-component drops: marangoni contraction versus autophobing
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8015233/
https://www.ncbi.nlm.nih.gov/pubmed/33734702
http://dx.doi.org/10.1021/acs.langmuir.0c03571
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