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Structure Frustration Enables Thermal History-Dependent Responsive Behavior in Self-Healing Hydrogels

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Title: Structure Frustration Enables Thermal History-Dependent Responsive Behavior in Self-Healing Hydrogels
Authors: Yu, Chengtao Browse this author
Cui, Kunpeng Browse this author
Guo, Honglei Browse this author
Ye, Ya Nan Browse this author
Li, Xueyu Browse this author
Gong, Jian Ping Browse this author →KAKEN DB
Issue Date: 9-Nov-2021
Publisher: American Chemical Society
Journal Title: Macromolecules
Volume: 54
Issue: 21
Start Page: 9927
End Page: 9936
Publisher DOI: 10.1021/acs.macromol.1c01461
Abstract: Biological soft tissues usually execute their functions via nonequilibrium and dynamic structural transformations. By contrast, functional hydrogels are mainly constructed by implementing static and equilibrium structures in the polymer network. Here, using polyampholyte hydrogel as a model system, we demonstrated that the nonequilibrium structure transformation in self-healing hydrogels enables the gels with many new features, including thermal history dependence, quick and asymmetric thermal response (instant transparent-to-turbid transition but slow turbid-to-transparent transition), tunable cloud point, tunable recovery time, and tiny changes in sample size and mechanical performance. These features make them distinct to conventional thermoresponsive hydrogels based on thermodynamic equilibrium and endow them with a new type of promising thermoresponsive materials. We revealed the structure change and studied the role of the thermal protocol on this thermoresponsive behavior by combining ultraviolet spectrum, small-angle X-ray scattering, theology, and mechanical measurements. We also presented two conceptual applications of this thermoresponsive hydrogel in thermal imaging and security paper. We believe that this work will inspire future research on creating functional hydrogels via nonequilibrium structure transformations.
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see, see
Type: article (author version)
Appears in Collections:生命科学院・先端生命科学研究院 (Graduate School of Life Science / Faculty of Advanced Life Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 龔 剣萍 (Gong Jian Ping)

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