Wetting of Two-Component Drops
| Autor: | Michiel A. Hack, Jacco H. Snoeijer, Wojciech Kwieciński, Olinka Ramírez-Soto, Stefan Karpitschka, E. Stefan Kooij, Tim Segers |
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| Přispěvatelé: | MESA+ Institute, Physics of Fluids, Physics of Interfaces and Nanomaterials |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
UT-Hybrid-D FOS: Physical sciences 02 engineering and technology Condensed Matter - Soft Condensed Matter 010402 general chemistry 01 natural sciences Article Contact angle Physical phenomena Electrochemistry General Materials Science Contraction (operator theory) Spectroscopy Marangoni effect Component (thermodynamics) Fluid Dynamics (physics.flu-dyn) Physics - Fluid Dynamics Surfaces and Interfaces 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Chemical physics Soft Condensed Matter (cond-mat.soft) Wetting 0210 nano-technology Vicinal |
| Zdroj: | Langmuir, 37(12), 3605-3611. American Chemical Society Langmuir |
| ISSN: | 0743-7463 |
| Popis: | The wetting properties of multi-component 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 alkane diols 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). It turns out that the length of the alkyl tail of the alkane diol determines which mechanism is dominant, highlighting the intricate coupling between molecular physics and the macroscopic wetting of complex fluids. |
| Databáze: | OpenAIRE |
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