Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/254624
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Pickering emulsions stabilized by carboxylated nanodiamonds over a broad pH range |
Autor: | Huang, Zhiwei; Jurewicz, Izabela; Muñoz, Edgar CSIC ORCID ; Garriga, Rosa; Keddie, Joseph L. | Palabras clave: | Nanodiamond Pickering emulsion Membrane emulsification Saponification |
Fecha de publicación: | 24-oct-2021 | Editor: | Elsevier | Citación: | Journal of Colloid and Interface Science 608, part 2: 2025-2038 (2022) | Resumen: | [Hypothesis] Surfactants in emulsions sometimes do not provide adequate stability against coalescence, whereas Pickering emulsions often offer greater stability. In a search for stabilizers offering biocompatibility, we hypothesized that carboxylated nanodiamonds (ND) would impart stability to Pickering emulsions. [Experiments] We successfully prepared Pickering emulsions of sunflower oil in water via two different methods: membrane emulsification and probe sonication. The first method was only possible when the pH of the aqueous ND suspension was ≤ 4. [Findings] Pendant-drop tensiometry confirmed that carboxylated ND is adsorbed at the oil/water interface, with a greater decrease in interfacial tension found with increasing ND concentrations in the aqueous phase. The carboxylated ND become more hydrophilic with increasing pH, according to three-phase contact angle analysis, because of deprotonation of the carboxylic acid groups. Membrane emulsification yielded larger (about 30 µm) oil droplets, probe sonication produced smaller (sub-μm) oil droplets. The Pickering emulsions show high stability against mechanical vibration and long-term storage for one year. They remain stable against coalescence across a wide range of pH values. Sonicated emulsions show stability against creaming. In this first-ever systematic study of carboxylated ND-stabilized Pickering emulsions, we demonstrate a promising application in the delivery of β-carotene, as a model active ingredient. |
Descripción: | 13 figures.-- Supplementary material available.-- © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ | Versión del editor: | http://dx.doi.org/10.1016/j.jcis.2021.10.130 | URI: | http://hdl.handle.net/10261/254624 | DOI: | 10.1016/j.jcis.2021.10.130 | E-ISSN: | 1095-7103 |
Aparece en las colecciones: | (ICB) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Pickering emulsions-j.jcis.2021.10.130.pdf | Artículo principal | 1,33 MB | Adobe PDF | Visualizar/Abrir |
1-s2.0-S0021979721018075-mmc1.pdf | Información suplementaria | 1,26 MB | Adobe PDF | Visualizar/Abrir |
1-s2.0-S0021979721018075-mmc2.pptx | Información suplementaria | 813,02 kB | Microsoft Powerpoint XML | Visualizar/Abrir |
1-s2.0-S0021979721018075-mmc3.pptx | Información suplementaria | 13,14 MB | Microsoft Powerpoint XML | Visualizar/Abrir |
1-s2.0-S0021979721018075-mmc4.pptx | Información suplementaria | 6,89 MB | Microsoft Powerpoint XML | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
17
checked on 09-may-2024
WEB OF SCIENCETM
Citations
15
checked on 29-feb-2024
Page view(s)
52
checked on 16-may-2024
Download(s)
14
checked on 16-may-2024
Google ScholarTM
Check
Altmetric
Altmetric
Este item está licenciado bajo una Licencia Creative Commons