Coalescence dynamics in oil-in-water emulsions at elevated temperatures

Abstract Emulsion stability in a flow field is an extremely important issue relevant for many daily-life applications such as separation processes, food manufacturing, oil recovery etc. Microfluidic studies can provide micro-scale insight of the emulsion behavior but have primarily focussed on dropl...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Bijoy Bera, Rama Khazal, Karin Schroën
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/259e55f86e7e41e28bc95a96a169a6c1
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:259e55f86e7e41e28bc95a96a169a6c1
record_format	dspace
spelling	oai:doaj.org-article:259e55f86e7e41e28bc95a96a169a6c12021-12-02T14:47:31ZCoalescence dynamics in oil-in-water emulsions at elevated temperatures10.1038/s41598-021-89919-52045-2322https://doaj.org/article/259e55f86e7e41e28bc95a96a169a6c12021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89919-5https://doaj.org/toc/2045-2322Abstract Emulsion stability in a flow field is an extremely important issue relevant for many daily-life applications such as separation processes, food manufacturing, oil recovery etc. Microfluidic studies can provide micro-scale insight of the emulsion behavior but have primarily focussed on droplet breakup rather than on droplet coalescence. The crucial impact of certain conditions such as increased pressure or elevated temperature frequently used in industrial processes is completely overlooked in such micro-scale studies. In this work, we investigate droplet coalescence in flowing oil-in-water emulsions subjected to higher than room temperatures namely between 20 to 70 $$^{\circ }$$ ∘ C. We use a specifically designed lab-on-a-chip application for this purpose. Coalescence frequency is observed to increase with increasing temperature. We associate with this observation the change in viscosity at higher temperatures triggering a stronger perturbation in the thin aqueous film separating the droplets. Using the scaling law for rupture time of such a thin film, we establish a mechanism leading to a higher coalescence frequency at elevated temperatures.Bijoy BeraRama KhazalKarin SchroënNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Bijoy Bera Rama Khazal Karin Schroën Coalescence dynamics in oil-in-water emulsions at elevated temperatures
description	Abstract Emulsion stability in a flow field is an extremely important issue relevant for many daily-life applications such as separation processes, food manufacturing, oil recovery etc. Microfluidic studies can provide micro-scale insight of the emulsion behavior but have primarily focussed on droplet breakup rather than on droplet coalescence. The crucial impact of certain conditions such as increased pressure or elevated temperature frequently used in industrial processes is completely overlooked in such micro-scale studies. In this work, we investigate droplet coalescence in flowing oil-in-water emulsions subjected to higher than room temperatures namely between 20 to 70 $$^{\circ }$$ ∘ C. We use a specifically designed lab-on-a-chip application for this purpose. Coalescence frequency is observed to increase with increasing temperature. We associate with this observation the change in viscosity at higher temperatures triggering a stronger perturbation in the thin aqueous film separating the droplets. Using the scaling law for rupture time of such a thin film, we establish a mechanism leading to a higher coalescence frequency at elevated temperatures.
format	article
author	Bijoy Bera Rama Khazal Karin Schroën
author_facet	Bijoy Bera Rama Khazal Karin Schroën
author_sort	Bijoy Bera
title	Coalescence dynamics in oil-in-water emulsions at elevated temperatures
title_short	Coalescence dynamics in oil-in-water emulsions at elevated temperatures
title_full	Coalescence dynamics in oil-in-water emulsions at elevated temperatures
title_fullStr	Coalescence dynamics in oil-in-water emulsions at elevated temperatures
title_full_unstemmed	Coalescence dynamics in oil-in-water emulsions at elevated temperatures
title_sort	coalescence dynamics in oil-in-water emulsions at elevated temperatures
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/259e55f86e7e41e28bc95a96a169a6c1
work_keys_str_mv	AT bijoybera coalescencedynamicsinoilinwateremulsionsatelevatedtemperatures AT ramakhazal coalescencedynamicsinoilinwateremulsionsatelevatedtemperatures AT karinschroen coalescencedynamicsinoilinwateremulsionsatelevatedtemperatures
_version_	1718389498013810688

Coalescence dynamics in oil-in-water emulsions at elevated temperatures

Ejemplares similares