Solute effects on dynamics and deformation of emulsion droplets during freezing
Soft or rigid particles, suspended in a liquid melt, interact with an advancing solidification front in various industrial and natural processes, such as fabrication of particle-reinforced-composites, growth of crystals, cryopreservation, frost heave, and growth of sea ice. The particle dynamics rel...
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cracsoc:10.26434/chemrxiv-2021-n4rl6-v2 2024-04-07T07:55:51+00:00 Solute effects on dynamics and deformation of emulsion droplets during freezing Tyagi, Sidhanth Monteux, Cécile Deville, Sylvain 2022 http://dx.doi.org/10.26434/chemrxiv-2021-n4rl6-v2 https://chemrxiv.org/engage/api-gateway/chemrxiv/assets/orp/resource/item/620b7950bd05a0d1570781da/original/solute-effects-on-dynamics-and-deformation-of-emulsion-droplets-during-freezing.pdf unknown American Chemical Society (ACS) https://creativecommons.org/licenses/by-nc-nd/4.0/ posted-content 2022 cracsoc https://doi.org/10.26434/chemrxiv-2021-n4rl6-v2 2024-03-08T00:18:35Z Soft or rigid particles, suspended in a liquid melt, interact with an advancing solidification front in various industrial and natural processes, such as fabrication of particle-reinforced-composites, growth of crystals, cryopreservation, frost heave, and growth of sea ice. The particle dynamics relative to the front determine the microstructure as well as the functional properties of the solidified material. The previous studies have extensively investigated the interaction of foreign objects with a moving solid-liquid interface in pure melts while in most real-life systems, solutes or surface active impurities are almost always present. Here we study experimentally the interaction of spherical oil droplets with a moving planar ice-water interface, while systematically increasing the surfactant concentration in the bulk liquid, using \emph{in situ} cryo-confocal microscopy. We demonstrate that a small amount of surfactant in the bulk liquid can instigate long-range droplet repulsion, extending over a length scale of 40 to 100µm, in contrast to the short-range predicted previously (<1µm). We report on the droplet deformation, while they are in contact with the ice-water interface, as a function of the bulk surfactant concentration, the droplet size, and the crystal growth rate. We also depict the dynamic evolution of solute-enriched premelted films (~5µm). Our results demonstrate how an increasing concentration of surfactant in the bulk and its subsequent segregation during solidification can dramatically alter the solidification microstructures. We anticipate that our experimental study can serve for the development of theoretical models incorporating solute effects. Other/Unknown Material Sea ice ACS Publications |
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description |
Soft or rigid particles, suspended in a liquid melt, interact with an advancing solidification front in various industrial and natural processes, such as fabrication of particle-reinforced-composites, growth of crystals, cryopreservation, frost heave, and growth of sea ice. The particle dynamics relative to the front determine the microstructure as well as the functional properties of the solidified material. The previous studies have extensively investigated the interaction of foreign objects with a moving solid-liquid interface in pure melts while in most real-life systems, solutes or surface active impurities are almost always present. Here we study experimentally the interaction of spherical oil droplets with a moving planar ice-water interface, while systematically increasing the surfactant concentration in the bulk liquid, using \emph{in situ} cryo-confocal microscopy. We demonstrate that a small amount of surfactant in the bulk liquid can instigate long-range droplet repulsion, extending over a length scale of 40 to 100µm, in contrast to the short-range predicted previously (<1µm). We report on the droplet deformation, while they are in contact with the ice-water interface, as a function of the bulk surfactant concentration, the droplet size, and the crystal growth rate. We also depict the dynamic evolution of solute-enriched premelted films (~5µm). Our results demonstrate how an increasing concentration of surfactant in the bulk and its subsequent segregation during solidification can dramatically alter the solidification microstructures. We anticipate that our experimental study can serve for the development of theoretical models incorporating solute effects. |
format |
Other/Unknown Material |
author |
Tyagi, Sidhanth Monteux, Cécile Deville, Sylvain |
spellingShingle |
Tyagi, Sidhanth Monteux, Cécile Deville, Sylvain Solute effects on dynamics and deformation of emulsion droplets during freezing |
author_facet |
Tyagi, Sidhanth Monteux, Cécile Deville, Sylvain |
author_sort |
Tyagi, Sidhanth |
title |
Solute effects on dynamics and deformation of emulsion droplets during freezing |
title_short |
Solute effects on dynamics and deformation of emulsion droplets during freezing |
title_full |
Solute effects on dynamics and deformation of emulsion droplets during freezing |
title_fullStr |
Solute effects on dynamics and deformation of emulsion droplets during freezing |
title_full_unstemmed |
Solute effects on dynamics and deformation of emulsion droplets during freezing |
title_sort |
solute effects on dynamics and deformation of emulsion droplets during freezing |
publisher |
American Chemical Society (ACS) |
publishDate |
2022 |
url |
http://dx.doi.org/10.26434/chemrxiv-2021-n4rl6-v2 https://chemrxiv.org/engage/api-gateway/chemrxiv/assets/orp/resource/item/620b7950bd05a0d1570781da/original/solute-effects-on-dynamics-and-deformation-of-emulsion-droplets-during-freezing.pdf |
genre |
Sea ice |
genre_facet |
Sea ice |
op_rights |
https://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.26434/chemrxiv-2021-n4rl6-v2 |
_version_ |
1795673377412743168 |