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Friction of zwitterionic hydrogel by dynamic polymer adsorption

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Title: Friction of zwitterionic hydrogel by dynamic polymer adsorption
Authors: Ahmed, Jamil Browse this author
Yamamoto, Tetsurou Browse this author
Guo, Honglei Browse this author
Kurokawa, Takayuki Browse this author
Nonoyama, Takayuki Browse this author
Nakajima, Tasuku Browse this author
Gong, Jian Ping Browse this author →KAKEN DB
Keywords: Friction
Electrostatic interaction
Polymer adsorption
Adsorption time
Elastic energy
Issue Date: 11-Aug-2015
Journal Title: Macromolecules
Volume: 48
Issue: 15
Start Page: 5394
End Page: 5401
Publisher DOI: 10.1021/acs.macromol.5b00602
Abstract: A simplified model describing the sliding friction of hydrogel on solid surface by dynamic adsorption of the polymer chains is proposed on the basis of polymer adsorption-repulsion theory. This dynamic adsorption model is used to analyze the friction results of zwitterionic hydrogels sliding over glass substrates with different substrate wettability, hydrogel swelling degree, ionic strength, and pH of bath solution. The adsorption time tau(b) of polymer strands is found to decrease with the increase in sliding velocity or the Weissenberg number as a result of stretching. The adsorption time tau(0)(b), and the adsorption energy U-ads at stress-free condition, which are characteristic for each friction system, are also estimated. Roughly, a master curve is observed for the normalized adsorption lifetime tau(b)/tau(0)(b) and the Weissenberg number, with less dependence on the adsorption energy and the bulk properties of the gels in the observed experimental conditions. Thus, the dynamic adsorption model successfully correlates the frictional behavior of hydrogels with the adsorption dynamics of polymer strands, which gives insight into the molecular design of hydrogels with predefined frictional properties for biomedical applications.
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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