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Exploring the roles of roughness, friction and adhesion in discontinuous shear thickening by means of thermo-responsive particles
Dense suspensions of colloidal or granular particles can display pronounced non-Newtonian behaviour, such as discontinuous shear thickening and shear jamming. The essential contribution of particle surface roughness and adhesive forces confirms that stress-activated frictional contacts can play a ke...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7935878/ https://www.ncbi.nlm.nih.gov/pubmed/33674607 http://dx.doi.org/10.1038/s41467-021-21580-y |
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author | Hsu, Chiao-Peng Mandal, Joydeb Ramakrishna, Shivaprakash N. Spencer, Nicholas D. Isa, Lucio |
author_facet | Hsu, Chiao-Peng Mandal, Joydeb Ramakrishna, Shivaprakash N. Spencer, Nicholas D. Isa, Lucio |
author_sort | Hsu, Chiao-Peng |
collection | PubMed |
description | Dense suspensions of colloidal or granular particles can display pronounced non-Newtonian behaviour, such as discontinuous shear thickening and shear jamming. The essential contribution of particle surface roughness and adhesive forces confirms that stress-activated frictional contacts can play a key role in these phenomena. Here, by employing a system of microparticles coated by responsive polymers, we report experimental evidence that the relative contributions of friction, adhesion, and surface roughness can be tuned in situ as a function of temperature. Modifying temperature during shear therefore allows contact conditions to be regulated, and discontinuous shear thickening to be switched on and off on demand. The macroscopic rheological response follows the dictates of independent single-particle characterization of adhesive and tribological properties, obtained by colloidal-probe atomic force microscopy. Our findings identify additional routes for the design of smart non-Newtonian fluids and open a way to more directly connect experiments to computational models of sheared suspensions. |
format | Online Article Text |
id | pubmed-7935878 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-79358782021-03-21 Exploring the roles of roughness, friction and adhesion in discontinuous shear thickening by means of thermo-responsive particles Hsu, Chiao-Peng Mandal, Joydeb Ramakrishna, Shivaprakash N. Spencer, Nicholas D. Isa, Lucio Nat Commun Article Dense suspensions of colloidal or granular particles can display pronounced non-Newtonian behaviour, such as discontinuous shear thickening and shear jamming. The essential contribution of particle surface roughness and adhesive forces confirms that stress-activated frictional contacts can play a key role in these phenomena. Here, by employing a system of microparticles coated by responsive polymers, we report experimental evidence that the relative contributions of friction, adhesion, and surface roughness can be tuned in situ as a function of temperature. Modifying temperature during shear therefore allows contact conditions to be regulated, and discontinuous shear thickening to be switched on and off on demand. The macroscopic rheological response follows the dictates of independent single-particle characterization of adhesive and tribological properties, obtained by colloidal-probe atomic force microscopy. Our findings identify additional routes for the design of smart non-Newtonian fluids and open a way to more directly connect experiments to computational models of sheared suspensions. Nature Publishing Group UK 2021-03-05 /pmc/articles/PMC7935878/ /pubmed/33674607 http://dx.doi.org/10.1038/s41467-021-21580-y Text en © The Author(s) 2021, corrected publication 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Hsu, Chiao-Peng Mandal, Joydeb Ramakrishna, Shivaprakash N. Spencer, Nicholas D. Isa, Lucio Exploring the roles of roughness, friction and adhesion in discontinuous shear thickening by means of thermo-responsive particles |
title | Exploring the roles of roughness, friction and adhesion in discontinuous shear thickening by means of thermo-responsive particles |
title_full | Exploring the roles of roughness, friction and adhesion in discontinuous shear thickening by means of thermo-responsive particles |
title_fullStr | Exploring the roles of roughness, friction and adhesion in discontinuous shear thickening by means of thermo-responsive particles |
title_full_unstemmed | Exploring the roles of roughness, friction and adhesion in discontinuous shear thickening by means of thermo-responsive particles |
title_short | Exploring the roles of roughness, friction and adhesion in discontinuous shear thickening by means of thermo-responsive particles |
title_sort | exploring the roles of roughness, friction and adhesion in discontinuous shear thickening by means of thermo-responsive particles |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7935878/ https://www.ncbi.nlm.nih.gov/pubmed/33674607 http://dx.doi.org/10.1038/s41467-021-21580-y |
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