Zhang Yawen, Chang Li, Sun Peiru, Cao Ziquan, Chen Yong, Liu Hongliang
School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology Chongqing 400050 P. R. China
CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences Beijing 100190 P. R. China
RSC Adv. 2020 Mar 2;10(13):7424-7431. doi: 10.1039/c9ra09632a. eCollection 2020 Feb 18.
Production of highly conductive and mechanically robust ionogels is urgently needed for the development of diverse flexible electrical devices, but it remains challenging. Herein, we report a facile strategy to prepare high-performance ionogels (ionic conductivity of 1.9 S m, fracture strain of 170%) electrostatic interaction between mechanically robust charged gel double networks and conductive ionic liquids. Ionogels based on charged polymer networks (with electrostatic interaction) exhibit obvious higher optical transmittance, ionic conductivity, and better mechanical properties compared with those based on neutral polymer networks (without electrostatic interaction). Ionic conductivity and mechanical properties of the ionogels can also be regulated by the double-network structure of the gels. We further develop an ionic skin sensor with the high-performance ionogels used as ionic conductors, which can exhibit excellent sensing performance even under harsh conditions. We envision that this new class of high-performance ionogels would be an attractive alternative to traditional hydrogels, and would extend the applications of ionic conductors to extreme environments.
开发各种柔性电气设备迫切需要生产高导电性和机械坚固性的离子凝胶，但这仍然具有挑战性。在此，我们报告了一种简便的策略来制备高性能离子凝胶（离子电导率为1.9 S/m，断裂应变为170%），即通过机械坚固的带电凝胶双网络与导电离子液体之间的静电相互作用来实现。与基于中性聚合物网络（无静电相互作用）的离子凝胶相比，基于带电聚合物网络（具有静电相互作用）的离子凝胶具有明显更高的透光率、离子电导率和更好的机械性能。离子凝胶的离子电导率和机械性能也可以通过凝胶的双网络结构来调节。我们进一步开发了一种以高性能离子凝胶作为离子导体的离子皮肤传感器，即使在恶劣条件下也能表现出优异的传感性能。我们设想，这类新型高性能离子凝胶将成为传统水凝胶的有吸引力的替代品，并将离子导体的应用扩展到极端环境中。
