Self-healing, adhesive, and highly stretchable ionogel as a strain sensor for extremely large deformations
Self-healing, adhesive, and highly stretchable ionogel as a strain sensor for extremely large deformations
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自愈、粘合和高拉伸离子凝胶作为应变传感器，用于极大的变形
DOI：
10.1002/smll.201804651
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发表时间：
2019
期刊：
影响因子：
13.3
通讯作者：
Suo Zhigang
中科院分区：
文献类型：
--
作者：
Zhang Li Mei;He Yuan;Cheng Sibo;Sheng Hao;Dai Keren;Zheng Wen Jiang;Wang Mei Xiang;Chen Zhen Shan;Chen Yong Mei;Suo Zhigang
制造能够以高灵敏度检测弯曲物体上的大变形的应变传感器在可穿戴电子产品、人机界面和软机器人中至关重要。在此，离子凝胶纳米复合材料是为了这个目的。调整离子凝胶纳米复合材料的组成可以实现最佳特性，例如优异的自愈合（>95%的愈合效率）、强粘附性（347.3 N m−1）、高拉伸性（2000%）以及拉伸下电阻变化超过十倍。此外，基于离子凝胶纳米复合物的传感器在500次循环后表现出良好的可靠性和优异的耐久性，以及当其在800- 1400%的应变下拉伸时20的大计量因子。此外，纳米复合材料可以在恶劣条件下自我修复，例如温度低至-20 °C和温度高达60 °C。所有这些优点的实现主要是由于动态金属配位键内的松散交联网络掺杂Fe 3 O 4纳米粒子的离子凝胶纳米复合材料的集成。
Fabricating a strain sensor that can detect large deformation over a curved object with a high sensitivity is crucial in wearable electronics, human/machine interfaces, and soft robotics. Herein, an ionogel nanocomposite is presented for this purpose. Tuning the composition of the ionogel nanocomposites allows the attainment of the best features, such as excellent self‐healing (>95% healing efficiency), strong adhesion (347.3 N m−1), high stretchability (2000%), and more than ten times change in resistance under stretching. Furthermore, the ionogel nanocomposite–based sensor exhibits good reliability and excellent durability after 500 cycles, as well as a large gauge factor of 20 when it is stretched under a strain of 800–1400%. Moreover, the nanocomposite can self‐heal under arduous conditions, such as a temperature as low as −20 °C and a temperature as high as 60 °C. All these merits are achieved mainly due to the integration of dynamic metal coordination bonds inside a loosely cross‐linked network of ionogel nanocomposite doped with Fe3O4nanoparticles.