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Pickering Emulsions Stabilized by Mesoporous Nanoparticles with Different Morphologies in Combination with DTAB
[Image: see text] The morphology of nanoparticles plays a significant role in the properties and applications of Pickering emulsions. Oil-in-water (O/W) Pickering emulsions were prepared using spherical, rod-like, and thread-like mesoporous silica nanoparticles (MSNPs) in combination with the cation...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9404459/ https://www.ncbi.nlm.nih.gov/pubmed/36033667 http://dx.doi.org/10.1021/acsomega.2c03215 |
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author | Xie, Danhua Jiang, Yulong Li, Kangling Yang, Xinyue Zhang, Yunjin |
author_facet | Xie, Danhua Jiang, Yulong Li, Kangling Yang, Xinyue Zhang, Yunjin |
author_sort | Xie, Danhua |
collection | PubMed |
description | [Image: see text] The morphology of nanoparticles plays a significant role in the properties and applications of Pickering emulsions. Oil-in-water (O/W) Pickering emulsions were prepared using spherical, rod-like, and thread-like mesoporous silica nanoparticles (MSNPs) in combination with the cationic surfactant dodecyltrimethylammonium bromide (DTAB) as a stabilizer. The effects of nanoparticle morphology on the stability and stimuli-responsive properties of Pickering emulsions were investigated. For spherical and rod-like MSNP systems, stable Pickering emulsions were obtained at DTAB concentrations above 0.2 mmol·L(–1). Stable Pickering emulsions containing thread-like MSNPs were produced at lower DTAB concentrations of approximately 0.1 mmol·L(–1). The droplets with thread-like MSNPs were extremely large with an average diameter around 700 μm at DTAB concentrations of 0.1–0.3 mmol·L(–1), which were approximately 20 times larger than those of conventional droplets. Scanning electron microscopy (SEM) images showed that all three types of MSNPs were located at the O/W interfaces. Irrespective of the morphology of the MSNPs, all the stable Pickering emulsions retained their original appearance for more than 6 months. By adding NaOH and HCl alternatively, the Pickering emulsions containing spherical and rod-like MSNPs could be switched between unstable and stable states more than 60 times. The Pickering emulsions containing thread-like MSNPs, by contrast, could have their droplet size switched between large and small more than 10 times without any obvious phase separation. The high anisotropy of thread-like MSNPs contributed to the low interface curvature of the droplets. This study revealed the relationship between the morphology of MSNPs and the characteristics of Pickering emulsions. These results enrich our knowledge about the formulation of Pickering emulsions and expand their applications. |
format | Online Article Text |
id | pubmed-9404459 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-94044592022-08-26 Pickering Emulsions Stabilized by Mesoporous Nanoparticles with Different Morphologies in Combination with DTAB Xie, Danhua Jiang, Yulong Li, Kangling Yang, Xinyue Zhang, Yunjin ACS Omega [Image: see text] The morphology of nanoparticles plays a significant role in the properties and applications of Pickering emulsions. Oil-in-water (O/W) Pickering emulsions were prepared using spherical, rod-like, and thread-like mesoporous silica nanoparticles (MSNPs) in combination with the cationic surfactant dodecyltrimethylammonium bromide (DTAB) as a stabilizer. The effects of nanoparticle morphology on the stability and stimuli-responsive properties of Pickering emulsions were investigated. For spherical and rod-like MSNP systems, stable Pickering emulsions were obtained at DTAB concentrations above 0.2 mmol·L(–1). Stable Pickering emulsions containing thread-like MSNPs were produced at lower DTAB concentrations of approximately 0.1 mmol·L(–1). The droplets with thread-like MSNPs were extremely large with an average diameter around 700 μm at DTAB concentrations of 0.1–0.3 mmol·L(–1), which were approximately 20 times larger than those of conventional droplets. Scanning electron microscopy (SEM) images showed that all three types of MSNPs were located at the O/W interfaces. Irrespective of the morphology of the MSNPs, all the stable Pickering emulsions retained their original appearance for more than 6 months. By adding NaOH and HCl alternatively, the Pickering emulsions containing spherical and rod-like MSNPs could be switched between unstable and stable states more than 60 times. The Pickering emulsions containing thread-like MSNPs, by contrast, could have their droplet size switched between large and small more than 10 times without any obvious phase separation. The high anisotropy of thread-like MSNPs contributed to the low interface curvature of the droplets. This study revealed the relationship between the morphology of MSNPs and the characteristics of Pickering emulsions. These results enrich our knowledge about the formulation of Pickering emulsions and expand their applications. American Chemical Society 2022-08-08 /pmc/articles/PMC9404459/ /pubmed/36033667 http://dx.doi.org/10.1021/acsomega.2c03215 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Xie, Danhua Jiang, Yulong Li, Kangling Yang, Xinyue Zhang, Yunjin Pickering Emulsions Stabilized by Mesoporous Nanoparticles with Different Morphologies in Combination with DTAB |
title | Pickering Emulsions
Stabilized by Mesoporous Nanoparticles
with Different Morphologies in Combination with DTAB |
title_full | Pickering Emulsions
Stabilized by Mesoporous Nanoparticles
with Different Morphologies in Combination with DTAB |
title_fullStr | Pickering Emulsions
Stabilized by Mesoporous Nanoparticles
with Different Morphologies in Combination with DTAB |
title_full_unstemmed | Pickering Emulsions
Stabilized by Mesoporous Nanoparticles
with Different Morphologies in Combination with DTAB |
title_short | Pickering Emulsions
Stabilized by Mesoporous Nanoparticles
with Different Morphologies in Combination with DTAB |
title_sort | pickering emulsions
stabilized by mesoporous nanoparticles
with different morphologies in combination with dtab |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9404459/ https://www.ncbi.nlm.nih.gov/pubmed/36033667 http://dx.doi.org/10.1021/acsomega.2c03215 |
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