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Internal Damage Evolution in Double-Network Hydrogels Studied by Microelectrode Technique

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Title: Internal Damage Evolution in Double-Network Hydrogels Studied by Microelectrode Technique
Authors: Guo, Honglei Browse this author
Hong, Wei Browse this author
Kurokawa, Takayuki Browse this author
Matsuda, Takahiro Browse this author
Wu, Zi Liang Browse this author
Nakajima, Tasuku Browse this author
Takahata, Masakazu Browse this author
Sun, Taolin Browse this author
Rao, Ping Browse this author
Gong, Jian Ping Browse this author →KAKEN DB
Issue Date: 24-Sep-2019
Publisher: American Chemical Society
Journal Title: Macromolecules
Volume: 52
Issue: 18
Start Page: 7114
End Page: 7122
Publisher DOI: 10.1021/acs.macromol.9b01308
Abstract: Double-network (DN) hydrogels have attracted considerable attention owing to their unique mechanism to show extraordinary mechanical strength and toughness. Although the toughening mechanism of the DN gels, breaking of the relatively stiff and brittle first network as sacrificial bonds, is widely accepted, the microstructure and morphology evolution of the internal damage have hardly been revealed. In this study, we study the internal structures of the first network in partially damaged DN gels by using the microelectrode technique (MET) based on the Donnan effect of the polyelectrolyte first network. We measure the spatial distribution of the electric potential of the prestretched and then reswelled DN gels. From the anisotropic depth profiles of potential and reswelling ratio, the microstructures of DN gels at a scale larger than the microelectrode probe size (similar to 200 nm) are revealed at the preyielding, yielding, and strain-hardening regimes.
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
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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