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Mechanism of temperature-induced asymmetric swelling and shrinking kinetics in self-healing hydrogels
Understanding the physical principle that governs the stimuli-induced swelling and shrinking kinetics of hydrogels is indispensable for their applications. Here, we show that the shrinking and swelling kinetics of self-healing hydrogels could be intrinsically asymmetric. The structure frustration, f...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
National Academy of Sciences
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9457170/ https://www.ncbi.nlm.nih.gov/pubmed/36037384 http://dx.doi.org/10.1073/pnas.2207422119 |
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author | Cui, Kunpeng Yu, Chengtao Ye, Ya Nan Li, Xueyu Gong, Jian Ping |
author_facet | Cui, Kunpeng Yu, Chengtao Ye, Ya Nan Li, Xueyu Gong, Jian Ping |
author_sort | Cui, Kunpeng |
collection | PubMed |
description | Understanding the physical principle that governs the stimuli-induced swelling and shrinking kinetics of hydrogels is indispensable for their applications. Here, we show that the shrinking and swelling kinetics of self-healing hydrogels could be intrinsically asymmetric. The structure frustration, formed by the large difference in the heat and solvent diffusions, remarkably slows down the shrinking kinetics. The plateau modulus of viscoelastic gels is found to be a key parameter governing the formation of structure frustration and, in turn, the asymmetric swelling and shrinking kinetics. This work provides fundamental understandings on the temperature-triggered transient structure formation in self-healing hydrogels. Our findings will find broad use in diverse applications of self-healing hydrogels, where cooperative diffusion of water and gel network is involved. Our findings should also give insight into the molecular diffusion in biological systems that possess macromolecular crowding environments similar to self-healing hydrogels. |
format | Online Article Text |
id | pubmed-9457170 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | National Academy of Sciences |
record_format | MEDLINE/PubMed |
spelling | pubmed-94571702023-03-01 Mechanism of temperature-induced asymmetric swelling and shrinking kinetics in self-healing hydrogels Cui, Kunpeng Yu, Chengtao Ye, Ya Nan Li, Xueyu Gong, Jian Ping Proc Natl Acad Sci U S A Physical Sciences Understanding the physical principle that governs the stimuli-induced swelling and shrinking kinetics of hydrogels is indispensable for their applications. Here, we show that the shrinking and swelling kinetics of self-healing hydrogels could be intrinsically asymmetric. The structure frustration, formed by the large difference in the heat and solvent diffusions, remarkably slows down the shrinking kinetics. The plateau modulus of viscoelastic gels is found to be a key parameter governing the formation of structure frustration and, in turn, the asymmetric swelling and shrinking kinetics. This work provides fundamental understandings on the temperature-triggered transient structure formation in self-healing hydrogels. Our findings will find broad use in diverse applications of self-healing hydrogels, where cooperative diffusion of water and gel network is involved. Our findings should also give insight into the molecular diffusion in biological systems that possess macromolecular crowding environments similar to self-healing hydrogels. National Academy of Sciences 2022-08-29 2022-09-06 /pmc/articles/PMC9457170/ /pubmed/36037384 http://dx.doi.org/10.1073/pnas.2207422119 Text en Copyright © 2022 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/This article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) . |
spellingShingle | Physical Sciences Cui, Kunpeng Yu, Chengtao Ye, Ya Nan Li, Xueyu Gong, Jian Ping Mechanism of temperature-induced asymmetric swelling and shrinking kinetics in self-healing hydrogels |
title | Mechanism of temperature-induced asymmetric swelling and shrinking kinetics in self-healing hydrogels |
title_full | Mechanism of temperature-induced asymmetric swelling and shrinking kinetics in self-healing hydrogels |
title_fullStr | Mechanism of temperature-induced asymmetric swelling and shrinking kinetics in self-healing hydrogels |
title_full_unstemmed | Mechanism of temperature-induced asymmetric swelling and shrinking kinetics in self-healing hydrogels |
title_short | Mechanism of temperature-induced asymmetric swelling and shrinking kinetics in self-healing hydrogels |
title_sort | mechanism of temperature-induced asymmetric swelling and shrinking kinetics in self-healing hydrogels |
topic | Physical Sciences |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9457170/ https://www.ncbi.nlm.nih.gov/pubmed/36037384 http://dx.doi.org/10.1073/pnas.2207422119 |
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