Flow‐Induced Long‐Term Stable Slippery Surfaces
| Autor: | Anke Kaltbeitzel, Maria D'Acunzi, Florian Geyer, Hoimar Bauer, Philipp Baumli, Viraj G. Damle, Hannu Teisala, Hans-Jürgen Butt, Diana Garcia-Gonzalez, Doris Vollmer |
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| Přispěvatelé: | Physics of Fluids |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Capillary action General Chemical Engineering Shear force General Physics and Astronomy Medicine (miscellaneous) 02 engineering and technology emulsions 010402 general chemistry confocal microscopy 01 natural sciences Biochemistry Genetics and Molecular Biology (miscellaneous) General Materials Science Lubricant Composite material lcsh:Science Coalescence (physics) wetting Communication General Engineering 021001 nanoscience & nanotechnology Communications 0104 chemical sciences Oil droplet flow Emulsion Lubrication lcsh:Q Wetting 0210 nano-technology porous surfaces |
| Zdroj: | Advanced Science, Vol 6, Iss 11, Pp n/a-n/a (2019) Advanced science, 6(11):1900019. Wiley-VCH Verlag Advanced Science |
| ISSN: | 2198-3844 |
| Popis: | Slippery lubricant‐infused surfaces allow easy removal of liquid droplets on surfaces. They consist of textured or porous substrates infiltrated with a chemically compatible lubricant. Capillary forces help to keep the lubricant in place. Slippery surfaces hold promising prospects in applications including drag reduction in pipes or food packages, anticorrosion, anti‐biofouling, or anti‐icing. However, a critical drawback is that shear forces induced by flow lead to depletion of the lubricant. In this work, a way to overcome the shear‐induced lubricant depletion by replenishing the lubricant from the flow of emulsions is presented. The addition of small amounts of positively charged surfactant reduces the charge repulsion between the negatively charged oil droplets contained in the emulsion. Attachment and coalescence of oil droplets from the oil‐in‐water emulsion at the substrate surface fills the structure with the lubricant. Flow‐induced lubrication of textured surfaces can be generalized to a broad range of lubricant–solid combinations using minimal amounts of oil. |
| Databáze: | OpenAIRE |
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