Wetting of Two-Component Drops: Marangoni Contraction Versus Autophobing

Michiel A. Hack; Wojciech Kwieciński; Olinka Ramírez-Soto; Tim Segers; Stefan Karpitschka; E. Stefan Kooij; Jacco H. Snoeijer

doi:10.1021/acs.langmuir.0c03571

Wetting of Two-Component Drops: Marangoni Contraction Versus Autophobing

Michiel A. Hack^*, Wojciech Kwieciński^*, Olinka Ramírez-Soto^*, Tim Segers, Stefan Karpitschka, E. Stefan Kooij, Jacco H. Snoeijer

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

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.

Original language	English
Pages (from-to)	3605-3611
Number of pages	7
Journal	Langmuir
Volume	37
Issue number	12
DOIs	https://doi.org/10.1021/acs.langmuir.0c03571
Publication status	Published - 30 Mar 2021

Keywords

UT-Hybrid-D

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acs.langmuir.0c03571 (1)Final published version, 846 KBLicence: CC BY-NC-ND

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title = "Wetting of Two-Component Drops: Marangoni Contraction Versus Autophobing",

abstract = "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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author = "Hack, {Michiel A.} and Wojciech Kwieci{\'n}ski and Olinka Ram{\'i}rez-Soto and Tim Segers and Stefan Karpitschka and Kooij, {E. Stefan} and Snoeijer, {Jacco H.}",

note = "ACS deal Funding Information: M.A.H., W.K., and O.R.-S. contributed equally to this manuscript. We thank M. Flapper, W. Tewes, and H. Wijshoff for stimulating discussions. Financial support from an Industrial Partnership Programme of the Netherlands Organisation for Scientific Research (NWO), cofinanced by Canon Production Printing Netherlands B.V., University of Twente, and Eindhoven University of Technology, and from the University of Twente-Max Planck Center for Complex Fluid Dynamics is acknowledged. Publisher Copyright: {\textcopyright} 2021 American Chemical Society. All rights reserved.",

year = "2021",

month = mar,

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doi = "10.1021/acs.langmuir.0c03571",

language = "English",

volume = "37",

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T1 - Wetting of Two-Component Drops

T2 - Marangoni Contraction Versus Autophobing

AU - Hack, Michiel A.

AU - Kwieciński, Wojciech

AU - Ramírez-Soto, Olinka

AU - Segers, Tim

AU - Karpitschka, Stefan

AU - Kooij, E. Stefan

AU - Snoeijer, Jacco H.

N1 - ACS deal Funding Information: M.A.H., W.K., and O.R.-S. contributed equally to this manuscript. We thank M. Flapper, W. Tewes, and H. Wijshoff for stimulating discussions. Financial support from an Industrial Partnership Programme of the Netherlands Organisation for Scientific Research (NWO), cofinanced by Canon Production Printing Netherlands B.V., University of Twente, and Eindhoven University of Technology, and from the University of Twente-Max Planck Center for Complex Fluid Dynamics is acknowledged. Publisher Copyright: © 2021 American Chemical Society. All rights reserved.

PY - 2021/3/30

Y1 - 2021/3/30

N2 - 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.

AB - 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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JO - Langmuir

JF - Langmuir

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ER -

Wetting of Two-Component Drops: Marangoni Contraction Versus Autophobing

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