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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...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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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. |
format | Online Article Text |
id | pubmed-9919868 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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