Sun Jingxian, Lu Guoqiang, Zhou Jiulei, Yuan Yixin, Zhu Xiaoqun, Nie Jun
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
ACS Appl Mater Interfaces. 2020 Mar 25;12(12):14272-14279. doi: 10.1021/acsami.0c01472. Epub 2020 Mar 12.
To date, ionogel sensors have aroused the extensive interest as an alternative to hydrogel sensors, as they are promising materials to solve the problems of easy drying and easy freezing. However, the weak mechanical properties of ionogels have seriously hindered their large-scale application. Herein, a robust physically linked double-network ionogel (DN ionogel) was fabricated via interpenetrating a poly(hydroxyethyl acrylate) network into an agarose network in 1-ethyl-3-methylimidazolium chloride. The DN ionogel possessed good mechanical properties, high transparency, extreme temperature tolerance, and excellent self-adhesion. The superior electromechanical properties render the DN ionogel as a perfect candidate to be utilized as a strain sensor to monitor various human activities. In addition, the DN ionogel exhibited reasonably high sensitivity to temperature. Therefore, it is believed that this high performance strain-temperature bimodal sensor offers a promising prospect in flexible intelligent electronics.
迄今为止，离子凝胶传感器作为水凝胶传感器的替代品引起了广泛关注，因为它们是解决易干燥和易冻结问题的有前途的材料。然而，离子凝胶较弱的机械性能严重阻碍了它们的大规模应用。在此，通过将聚丙烯酸羟乙酯网络互穿到氯化1-乙基-3-甲基咪唑鎓中的琼脂糖网络中，制备了一种坚固的物理交联双网络离子凝胶（DN离子凝胶）。该DN离子凝胶具有良好的机械性能、高透明度、极端温度耐受性和优异的自粘性。其优异的机电性能使DN离子凝胶成为用作应变传感器以监测各种人类活动的理想候选材料。此外，DN离子凝胶对温度表现出相当高的灵敏度。因此，相信这种高性能应变-温度双峰传感器在柔性智能电子领域具有广阔的应用前景。
