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Polyelectrolyte Complexation via Viscoelastic Phase Separation Results in Tough and Self-Recovering Porous Hydrogels

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Title: Polyelectrolyte Complexation via Viscoelastic Phase Separation Results in Tough and Self-Recovering Porous Hydrogels
Authors: Murakawa, Kohei Browse this author
King, Daniel Rudolf Browse this author
Sun, Tao Lin Browse this author
Guo, Honglei Browse this author
Kurokawa, Takayuki Browse this author →KAKEN DB
Gong, Jian Ping Browse this author →KAKEN DB
Issue Date: 21-Sep-2019
Publisher: Royal Society of Chemistry
Journal Title: Journal of materials chemistry. B, Materials for biology and medicine
Volume: 7
Issue: 35
Start Page: 5296
End Page: 5305
Publisher DOI: 10.1039/C9TB01376H
PMID: 31432060
Abstract: Polyelectrolyte complexation between oppositely charged polyelectrolytes forms coacervates in dilute solutions and thin films in concentrated solutions. It is difficult to obtain macroscopically uniform bulk polyelectrolyte complex (PEC) materials, since the two polymers form insoluble complexes quickly at the contact interface during mixing, resulting in heterogeneous aggregates. Here, we succedded in preparing bulk PEC materials based on desalting-induced polyelectrolyte complexation via viscolestic phase seperation. With a high ionic strength aquetious medium, a homogeneous and concentrated solution containing oppositely charged polyelectrolytes is prepared. Desalting of the counter-ions and co-ions of the solution through semi-permeable membranes induces viscoelastic phase separation of the solution to form a physical hydrogel with open pore structrue. Regulating the charge ratio of the two oppositely charged polymers results in significant changes in the porous morphology and mechanical properties. The charge-balanced PEC hydrogels show unique properties including high toughness and self-recovery due to the reversible ionic associations. The porous yet tough properties of bulk PEC hydrogels makes them potential candidates for applications such as cell scaffolds.
Type: article (author version)
Appears in Collections:国際連携研究教育局 : GI-CoRE (Global Institution for Collaborative Research and Education : GI-CoRE) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 龔 剣萍 (Gong Jian Ping)

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