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

• Nakajima, Tasuku

• Chida, Takaharu

• Mito, Kei

• Kurokawa, Takayuki

• Gong, Jian Ping

抄録

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.

収録刊行物

• Soft matter

  Soft matter 16 (23), 5487-5496, 2020-06-21

  Royal Society of Chemistry

キーワード

• Condensed Matter Physics
• General Chemistry

詳細情報

• CRID: 1050851475396052096
• NII論文ID: 120007089527
• DOI: 10.1039/d0sm00605j
• ISSN: 17446848
• ISSN: 1744683X
• HANDLE: 2115/81939
• Web Site: http://pubs.rsc.org/en/content/articlepdf/2020/SM/D0SM00605J
• 本文言語コード: en
• 資料種別: journal article
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