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Responsive Pickering Emulsions Stabilized by Frozen Complex Coacervate Core Micelles
[Image: see text] Frozen complex coacervate core micelles (C3Ms) were developed as a class of particle stabilizers for Pickering emulsions. The C3Ms are composed of a core of electrostatically interacting weak polyelectrolytes, poly(acrylic acid) (pAA) and poly(dimethylaminopropylacrylamide) (pDMAPA...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8772379/ https://www.ncbi.nlm.nih.gov/pubmed/35574801 http://dx.doi.org/10.1021/acsmacrolett.1c00647 |
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author | Es Sayed, Julien Brummer, Hugo Stuart, Marc C. A. Sanson, Nicolas Perrin, Patrick Kamperman, Marleen |
author_facet | Es Sayed, Julien Brummer, Hugo Stuart, Marc C. A. Sanson, Nicolas Perrin, Patrick Kamperman, Marleen |
author_sort | Es Sayed, Julien |
collection | PubMed |
description | [Image: see text] Frozen complex coacervate core micelles (C3Ms) were developed as a class of particle stabilizers for Pickering emulsions. The C3Ms are composed of a core of electrostatically interacting weak polyelectrolytes, poly(acrylic acid) (pAA) and poly(dimethylaminopropylacrylamide) (pDMAPAA), surrounded by a corona of water-soluble and surface active poly(N-isopropylacrylamide) (pNiPAM). Mixing parameters of the two polymer solutions, including pH, mixing method, charge ratio, and salinity of the medium, were carefully controlled, leading to monodisperse, colloidally stable C3Ms. A combination of dynamic light scattering and proton nuclear magnetic resonance experiments showed that the C3Ms gradually disassembled from a dynamically frozen core state in pure water into free polyelectrolyte chains above 0.8 M NaCl. Upon formulation of dodecane-in-water emulsions, the frozen C3Ms adsorb as particles at the droplet interfaces in striking contrast with most of the conventional micelles made of amphiphilic block copolymers which fall apart at the interface. Eventually, increasing the salt concentration of the system triggered disassembly of the C3Ms, which led to emulsion destabilization. |
format | Online Article Text |
id | pubmed-8772379 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-87723792022-01-21 Responsive Pickering Emulsions Stabilized by Frozen Complex Coacervate Core Micelles Es Sayed, Julien Brummer, Hugo Stuart, Marc C. A. Sanson, Nicolas Perrin, Patrick Kamperman, Marleen ACS Macro Lett [Image: see text] Frozen complex coacervate core micelles (C3Ms) were developed as a class of particle stabilizers for Pickering emulsions. The C3Ms are composed of a core of electrostatically interacting weak polyelectrolytes, poly(acrylic acid) (pAA) and poly(dimethylaminopropylacrylamide) (pDMAPAA), surrounded by a corona of water-soluble and surface active poly(N-isopropylacrylamide) (pNiPAM). Mixing parameters of the two polymer solutions, including pH, mixing method, charge ratio, and salinity of the medium, were carefully controlled, leading to monodisperse, colloidally stable C3Ms. A combination of dynamic light scattering and proton nuclear magnetic resonance experiments showed that the C3Ms gradually disassembled from a dynamically frozen core state in pure water into free polyelectrolyte chains above 0.8 M NaCl. Upon formulation of dodecane-in-water emulsions, the frozen C3Ms adsorb as particles at the droplet interfaces in striking contrast with most of the conventional micelles made of amphiphilic block copolymers which fall apart at the interface. Eventually, increasing the salt concentration of the system triggered disassembly of the C3Ms, which led to emulsion destabilization. American Chemical Society 2021-12-14 2022-01-18 /pmc/articles/PMC8772379/ /pubmed/35574801 http://dx.doi.org/10.1021/acsmacrolett.1c00647 Text en © 2021 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 | Es Sayed, Julien Brummer, Hugo Stuart, Marc C. A. Sanson, Nicolas Perrin, Patrick Kamperman, Marleen Responsive Pickering Emulsions Stabilized by Frozen Complex Coacervate Core Micelles |
title | Responsive Pickering Emulsions Stabilized by Frozen
Complex Coacervate Core Micelles |
title_full | Responsive Pickering Emulsions Stabilized by Frozen
Complex Coacervate Core Micelles |
title_fullStr | Responsive Pickering Emulsions Stabilized by Frozen
Complex Coacervate Core Micelles |
title_full_unstemmed | Responsive Pickering Emulsions Stabilized by Frozen
Complex Coacervate Core Micelles |
title_short | Responsive Pickering Emulsions Stabilized by Frozen
Complex Coacervate Core Micelles |
title_sort | responsive pickering emulsions stabilized by frozen
complex coacervate core micelles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8772379/ https://www.ncbi.nlm.nih.gov/pubmed/35574801 http://dx.doi.org/10.1021/acsmacrolett.1c00647 |
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