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Stretching-induced ion complexation in physical polyampholyte hydrogels

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タイトル: Stretching-induced ion complexation in physical polyampholyte hydrogels
著者: Cui, Kunpeng 著作を一覧する
Sun, Tao Lin 著作を一覧する
Kurokawa, Takayuki 著作を一覧する
Nakajima, Tasuku 著作を一覧する
Nonoyama, Takayuki 著作を一覧する
Chen, Liang 著作を一覧する
Gong, Jian Ping 著作を一覧する
発行日: 2016年11月21日
出版者: Royal Society of Chemistry
誌名: Soft matter
巻: 12
号: 43
開始ページ: 8833
終了ページ: 8840
出版社 DOI: 10.1039/c6sm01833e
抄録: Recently, we have developed a series of charge balanced polyampholyte (PA) physical hydrogels by random copolymerization in water, which show extraordinarily high toughness, self-healing ability and viscoelasticity. The excellent performance of PA hydrogels is ascribed to dynamic ionic bond formation through inter-and intra-chain interactions. The randomness results in ionic bonds of wide strength distribution, the strong bonds, which serve as permanent crosslinking, imparting the elasticity, while the weak bonds reversibly break and re-form, dissipating energy. In this work, we developed a simple physical method, called a pre-stretching method, to promote the performance of PA hydrogels. By imposing a pre-stretching on the sample in the as-prepared state, ion complexation during dialysis is prominently accelerated and the final performance is largely promoted. Further analysis suggests that the strong bond formation induced by pre-stretching is responsible for the change in final performance. Pre-stretching decreases the entropy of the system and increases the chain alignment, resulting in an increased possibility for strong bond formation.
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 龔 剣萍 (Gong Jian Ping)


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