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Increasing entropy for colloidal stabilization

Stability is of paramount importance in colloidal applications. Attraction between colloidal particles is believed to lead to particle aggregation and phase separation; hence, stability improvement can be achieved through either increasing repulsion or reducing attraction by modifying the fluid medi...

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Detalles Bibliográficos
Autores principales: Mo, Songping, Shao, Xuefeng, Chen, Ying, Cheng, Zhengdong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5181840/
https://www.ncbi.nlm.nih.gov/pubmed/27872473
http://dx.doi.org/10.1038/srep36836
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author Mo, Songping
Shao, Xuefeng
Chen, Ying
Cheng, Zhengdong
author_facet Mo, Songping
Shao, Xuefeng
Chen, Ying
Cheng, Zhengdong
author_sort Mo, Songping
collection PubMed
description Stability is of paramount importance in colloidal applications. Attraction between colloidal particles is believed to lead to particle aggregation and phase separation; hence, stability improvement can be achieved through either increasing repulsion or reducing attraction by modifying the fluid medium or by using additives. Two traditional mechanisms for colloidal stability are electrostatic stabilization and steric stabilization. However, stability improvement by mixing attractive and unstable particles has rarely been considered. Here, we emphasize the function of mixing entropy in colloidal stabilization. Dispersion stability improvement is demonstrated by mixing suspensions of attractive nanosized titania spheres and platelets. A three-dimensional phase diagram is proposed to illustrate the collaborative effects of particle mixing and particle attraction on colloidal stability. This discovery provides a novel method for enhancing colloidal stability and opens a novel opportunity for engineering applications.
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spelling pubmed-51818402016-12-29 Increasing entropy for colloidal stabilization Mo, Songping Shao, Xuefeng Chen, Ying Cheng, Zhengdong Sci Rep Article Stability is of paramount importance in colloidal applications. Attraction between colloidal particles is believed to lead to particle aggregation and phase separation; hence, stability improvement can be achieved through either increasing repulsion or reducing attraction by modifying the fluid medium or by using additives. Two traditional mechanisms for colloidal stability are electrostatic stabilization and steric stabilization. However, stability improvement by mixing attractive and unstable particles has rarely been considered. Here, we emphasize the function of mixing entropy in colloidal stabilization. Dispersion stability improvement is demonstrated by mixing suspensions of attractive nanosized titania spheres and platelets. A three-dimensional phase diagram is proposed to illustrate the collaborative effects of particle mixing and particle attraction on colloidal stability. This discovery provides a novel method for enhancing colloidal stability and opens a novel opportunity for engineering applications. Nature Publishing Group 2016-11-22 /pmc/articles/PMC5181840/ /pubmed/27872473 http://dx.doi.org/10.1038/srep36836 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Mo, Songping
Shao, Xuefeng
Chen, Ying
Cheng, Zhengdong
Increasing entropy for colloidal stabilization
title Increasing entropy for colloidal stabilization
title_full Increasing entropy for colloidal stabilization
title_fullStr Increasing entropy for colloidal stabilization
title_full_unstemmed Increasing entropy for colloidal stabilization
title_short Increasing entropy for colloidal stabilization
title_sort increasing entropy for colloidal stabilization
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5181840/
https://www.ncbi.nlm.nih.gov/pubmed/27872473
http://dx.doi.org/10.1038/srep36836
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