Polymerization of moldable self-healing hydrogel with liquid metal nanodroplets for flexible strain-sensing devices
Polymerization of moldable self-healing hydrogel with liquid metal nanodroplets for flexible strain-sensing devices
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DOI：
10.1016/j.cej.2019.123788
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发表时间：
2020-07
影响因子：
15.1
通讯作者：
Jie Xu;Zengbin Wang;Jun You;Xiankai Li;Mingjie Li;Xiaochen Wu;Chaoxu Li
中科院分区：
文献类型：
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作者：
Jie Xu;Zengbin Wang;Jun You;Xiankai Li;Mingjie Li;Xiaochen Wu;Chaoxu Li
将纳米胶体物体引入三维水凝胶网络中，不仅可以增强水凝胶作为胶体交联剂的作用，还可以为不同的应用增加许多额外的功能。与许多惰性刚性固体纳米薄膜相比，首次提出了可变形的液态金属液滴(LM)与超声作用相结合，能够通过简单的超声过程引发和凝胶化丙烯酸(AA)。生成的水凝胶壳也稳定了LM液滴。除了柔软、可拉伸和对缺口不敏感的韧性外，LM液滴还提供了可成型性以及通过释放GA3+阳离子的活性自由基和离子交联剂而具有出色的自愈性能。因此，LM和可聚合单体的结合不仅为将LM一步法引入聚合物体系提供了前所未有的机会，而且还提供了一种适用于组织工程、可穿戴设备和储能设备中的固体电解质的新型水凝胶。
Incorporation of nanoscale colloidal objects into three-dimensional (3D) hydrogel networks can not only reinforce the hydrogels as “colloidal cross-linkers”, but also add many extra functionalities for diverse applications. For the first time, deformable droplets of liquid metal (LM) in combination with sonication were suggested to be able to initiate and gel acrylic acid (AA) via a facile sonication procedure, with comparison to many inert rigid solid nanofillers. The LM droplets were also stabilized by the resultant hydrogel shells. Besides softness, stretchability, and notch-insensitive toughness, the LM droplets also offered moldability as well as an exceptional self-healing property by releasing active radicals and ionic cross-linkers of Ga3+cations. Thus the combination of LM and polymerizable monomers not only poses an unprecedented opportunity of incorporating LM into polymeric systems in a facile one-step procedure, but also offers a new type of hydrogels applicable in tissue engineering, wearable devices and solid electrolyte in energy storage devices.