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Self-Healing Behaviors of Tough Polyampholyte Hydrogels

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Title: Self-Healing Behaviors of Tough Polyampholyte Hydrogels
Authors: Ihsan, Abu Bin Browse this author
Sun, Tao Lin Browse this author
Kurokawa, Takayuki Browse this author
Karobi, Sadia Nazneen Browse this author
Nakajima, Tasuku Browse this author
Nonoyama, Takayuki Browse this author
Roy, Chanchal Kumar Browse this author
Luo, Feng Browse this author
Gong, Jian Ping Browse this author →KAKEN DB
Issue Date: 14-Jun-2016
Publisher: American Chemical Society
Journal Title: Macromolecules
Volume: 49
Issue: 11
Start Page: 4245
End Page: 4252
Publisher DOI: 10.1021/acs.macromol.6b00437
Abstract: Recently, polyampolytes have been discovered to form hydrogels that possess high toughness, full resilience, and self-healing between two cut surfaces. The self-healing of this class of hydrogels is based on the re-forming of the multiple ionic bonds at the fractured surfaces, in which the mobility of the polymer segments and strength of the ionic bonds play an important role. In this work, we study the effects of healing temperature and chemistry of the polyampholyte hydrogels (chemical cross-linker density and chemical structure of the monomers) on the healing kinetics and healing efficiency. The high healing temperature substantially accelerates the self-healing kinetics. Chemical cross-linking reduces the self-healing efficiency. Monomers with more hydrophobic feature give a low self-healing efficiency. For polyampholyte physical hydrogels with a softening temperature below the room temperature, excellent healing efficiency (∼84% on average and maximum 99%) was observed without any external stimuli. We found a correlation between the self-healing efficiency and the fraction of dynamic bonds in the total bonds for relatively soft samples, which is an evidence that the selfhealing is due to the re-forming of dynamic bonds.
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, copyright ©2016 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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