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Particles’ Organization in Direct Oil-in-Water and Reverse Water-in-Oil Pickering Emulsions

This paper addresses the impact of the particle initial wetting and the viscosity of the oil phase on the structure and rheological properties of direct (Oil/Water) and reverse (Water/Oil) Pickering emulsions. The emulsion structure was investigated via confocal microscopy and static light scatterin...

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Autores principales: Ramos, Diego M., Sadtler, Véronique, Marchal, Philippe, Lemaitre, Cécile, Niepceron, Frédérick, Benyahia, Lazhar, Roques-Carmes, Thibault
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9919868/
https://www.ncbi.nlm.nih.gov/pubmed/36770332
http://dx.doi.org/10.3390/nano13030371
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author Ramos, Diego M.
Sadtler, Véronique
Marchal, Philippe
Lemaitre, Cécile
Niepceron, Frédérick
Benyahia, Lazhar
Roques-Carmes, Thibault
author_facet Ramos, Diego M.
Sadtler, Véronique
Marchal, Philippe
Lemaitre, Cécile
Niepceron, Frédérick
Benyahia, Lazhar
Roques-Carmes, Thibault
author_sort Ramos, Diego M.
collection PubMed
description This paper addresses the impact of the particle initial wetting and the viscosity of the oil phase on the structure and rheological properties of direct (Oil/Water) and reverse (Water/Oil) Pickering emulsions. The emulsion structure was investigated via confocal microscopy and static light scattering. The flow and viscoelastic properties were probed by a stress-controlled rheometer. Partially hydrophobic silica particles have been employed at 1 and 4 wt.% to stabilize dodecane or paraffin-based emulsions at 20 vol.% of the dispersed phase. W/O emulsions were obtained when the particles were dispersed in the oily phase while O/W emulsions were prepared when the silica was introduced in the aqueous phase. We demonstrated that, although the particles adsorbed at the droplets interfaces for all the emulsions, their organization, the emulsion structure and their rheological properties depend in which phase they were previously dispersed in. We discuss these features as a function of the particle concentration and the oil viscosity.
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spelling pubmed-99198682023-02-12 Particles’ Organization in Direct Oil-in-Water and Reverse Water-in-Oil Pickering Emulsions Ramos, Diego M. Sadtler, Véronique Marchal, Philippe Lemaitre, Cécile Niepceron, Frédérick Benyahia, Lazhar Roques-Carmes, Thibault Nanomaterials (Basel) Article This paper addresses the impact of the particle initial wetting and the viscosity of the oil phase on the structure and rheological properties of direct (Oil/Water) and reverse (Water/Oil) Pickering emulsions. The emulsion structure was investigated via confocal microscopy and static light scattering. The flow and viscoelastic properties were probed by a stress-controlled rheometer. Partially hydrophobic silica particles have been employed at 1 and 4 wt.% to stabilize dodecane or paraffin-based emulsions at 20 vol.% of the dispersed phase. W/O emulsions were obtained when the particles were dispersed in the oily phase while O/W emulsions were prepared when the silica was introduced in the aqueous phase. We demonstrated that, although the particles adsorbed at the droplets interfaces for all the emulsions, their organization, the emulsion structure and their rheological properties depend in which phase they were previously dispersed in. We discuss these features as a function of the particle concentration and the oil viscosity. MDPI 2023-01-17 /pmc/articles/PMC9919868/ /pubmed/36770332 http://dx.doi.org/10.3390/nano13030371 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ramos, Diego M.
Sadtler, Véronique
Marchal, Philippe
Lemaitre, Cécile
Niepceron, Frédérick
Benyahia, Lazhar
Roques-Carmes, Thibault
Particles’ Organization in Direct Oil-in-Water and Reverse Water-in-Oil Pickering Emulsions
title Particles’ Organization in Direct Oil-in-Water and Reverse Water-in-Oil Pickering Emulsions
title_full Particles’ Organization in Direct Oil-in-Water and Reverse Water-in-Oil Pickering Emulsions
title_fullStr Particles’ Organization in Direct Oil-in-Water and Reverse Water-in-Oil Pickering Emulsions
title_full_unstemmed Particles’ Organization in Direct Oil-in-Water and Reverse Water-in-Oil Pickering Emulsions
title_short Particles’ Organization in Direct Oil-in-Water and Reverse Water-in-Oil Pickering Emulsions
title_sort particles’ organization in direct oil-in-water and reverse water-in-oil pickering emulsions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9919868/
https://www.ncbi.nlm.nih.gov/pubmed/36770332
http://dx.doi.org/10.3390/nano13030371
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