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Double-network gels as polyelectrolyte gels with salt-insensitive swelling properties

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Title: Double-network gels as polyelectrolyte gels with salt-insensitive swelling properties
Authors: Nakajima, Tasuku Browse this author →KAKEN DB
Chida, Takaharu Browse this author
Mito, Kei Browse this author
Kurokawa, Takayuki Browse this author →KAKEN DB
Gong, Jian Ping Browse this author →KAKEN DB
Issue Date: 21-Jun-2020
Publisher: Royal Society of Chemistry
Journal Title: Soft matter
Volume: 16
Issue: 23
Start Page: 5487
End Page: 5496
Publisher DOI: 10.1039/d0sm00605j
Abstract: Polyelectrolyte gels exhibit intrinsic salt-sensitive swelling behaviour, which causes size instability in ionic environments. Thus, polyelectrolyte gels that show salt-insensitive swelling have been anticipated for applications in ionic environments, such as medical materials usedin vivo. We found that double-network (DN) gels consisting of both a polyelectrolyte network and a non-ionic network are resistant to salt-sensitive swelling. This resistance is attributed to their lower osmotic pressure originating from mobile ions relative to the osmotic pressure of mixing at swelling equilibrium. Our investigation indicated that the two contrasting network structures within the DN gels are vital for achieving these properties, where the structures include a highly prestretched and sparse polyelectrolyte network and a coiled and dense non-ionic network. The salt-insensitivity of the DN gels will lead to their unique applications in ionic environments.
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)
理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 中島 祐

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