Extremely stretchable thermosensitive hydrogels by introducing slide-ring polyrotaxane cross-linkers and ionic groups into the polymer network.
Extremely stretchable thermosensitive hydrogels by introducing slide-ring polyrotaxane cross-linkers and ionic groups into the polymer network.
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DOI：
10.1038/ncomms6124
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发表时间：
2014-10-08
影响因子：
16.6
通讯作者：
Takeoka Y
中科院分区：
文献类型：
--
作者：
Bin Imran A;Esaki K;Gotoh H;Seki T;Ito K;Sakai Y;Takeoka Y
刺激敏感水凝胶可根据各种刺激改变其体积和形状，在多个领域具有潜在的应用。然而，由于一些需要克服的问题，这些水凝胶尚未商业化。最重要的问题之一是传统的刺激敏感水凝胶通常很脆。我们利用α-环糊精和聚乙二醇组成的聚轮烷衍生物作为交联剂，并在聚合物网络中引入离子基团，制备了具有良好韧性的极具拉伸性的热敏水凝胶。离子基团有助于聚轮烷交联剂在聚合物网络中良好延伸。所得到的水凝胶具有惊人的可拉伸性和韧性，因为交联的 α-环糊精分子可以沿着聚乙二醇链移动。另外，聚轮烷交联剂可以与多种乙烯基单体一起使用；通过使用这些交联剂可以改善各种聚合物凝胶的机械性能。 刺激响应水凝胶在多个领域具有潜在的应用前景；然而，一个常见的问题是所得结构的脆性。在这里，作者通过在系统中引入滑动聚轮烷交联剂和离子基团，报告了高度可拉伸的热敏水凝胶。
Stimuli-sensitive hydrogels changing their volumes and shapes in response to various stimulations have potential applications in multiple fields. However, these hydrogels have not yet been commercialized due to some problems that need to be overcome. One of the most significant problems is that conventional stimuli-sensitive hydrogels are usually brittle. Here we prepare extremely stretchable thermosensitive hydrogels with good toughness by using polyrotaxane derivatives composed of α-cyclodextrin and polyethylene glycol as cross-linkers and introducing ionic groups into the polymer network. The ionic groups help the polyrotaxane cross-linkers to become well extended in the polymer network. The resulting hydrogels are surprisingly stretchable and tough because the cross-linked α-cyclodextrin molecules can move along the polyethylene glycol chains. In addition, the polyrotaxane cross-linkers can be used with a variety of vinyl monomers; the mechanical properties of the wide variety of polymer gels can be improved by using these cross-linkers. Stimuli-responsive hydrogels have potential applications in multiple fields; however, a common problem is the brittleness of the resulting structures. Here, the authors report highly stretchable thermosensitive hydrogels by introducing sliding polyrotaxane cross-linkers and ionic groups into the system.
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影响因子：
29.4
作者：
Maeda, Shingo;Hara, Yusuke;Hashimoto, Shuji
通讯作者：
Hashimoto, Shuji
影响因子：
5.5
作者：
Bin Imran, Abu;Seki, Takahiro;Takeoka, Yukikazu
通讯作者：
Takeoka, Yukikazu
影响因子：
5.5
作者：
Karino, T;Okumura, Y;Shibayama, M
通讯作者：
Shibayama, M
影响因子：
2.8
作者：
Karino, Takeshi;Shibayama, Mitsuhiro;Ito, Kohzo
通讯作者：
Ito, Kohzo
影响因子：
10.8
作者：
OKANO, T;BAE, YH;KIM, SW
通讯作者：
KIM, SW