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Physical hydrogels composed of polyampholytes demonstrate high toughness and viscoelasticity

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Title: Physical hydrogels composed of polyampholytes demonstrate high toughness and viscoelasticity
Authors: Sun, Tao Lin Browse this author
Kurokawa, Takayuki Browse this author →KAKEN DB
Kuroda, Shinya Browse this author
Bin Ihsan, Abu Browse this author
Akasaki, Taigo Browse this author
Sato, Koshiro Browse this author
Haque, Md Anamul Browse this author
Nakajima, Tasuku Browse this author
Gong, Jian Ping Browse this author →KAKEN DB
Issue Date: Oct-2013
Publisher: Nature publishing group
Journal Title: Nature materials
Volume: 12
Issue: 10
Start Page: 932
End Page: 937
Publisher DOI: 10.1038/NMAT3713
PMID: 23892784
Abstract: Hydrogels attract great attention as biomaterials as a result of their soft and wet nature, similar to that of biological tissues. Recent inventions of several tough hydrogels show their potential as structural biomaterials, such as cartilage. Any given application, however, requires a combination of mechanical properties including stiffness, strength, toughness, damping, fatigue resistance and self-healing, along with biocompatibility. This combination is rarely realized. Here, we report that polyampholytes, polymers bearing randomly dispersed cationic and anionic repeat groups, form tough and viscoelastic hydrogels with multiple mechanical properties. The randomness makes ionic bonds of a wide distribution of strength. The strong bonds serve as permanent crosslinks, imparting elasticity, whereas the weak bonds reversibly break and re-form, dissipating energy. These physical hydrogels of supramolecular structure can be tuned to change multiple mechanical properties over wide ranges by using diverse ionic combinations. This polyampholyte approach is synthetically simple and dramatically increases the choice of tough hydrogels for applications.
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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