Liu Xinhua, He Bin, Wang Zhipeng, Tang Haifeng, Su Teng, Wang Qigang
Department of Chemistry and Advanced Research Institute, Tongji University, Shanghai 200092 (P. R. China).
Department of Control Science and Engineering, Tongji University, Shanghai 201804 (P. R. China).
Sci Rep. 2014 Oct 20;4:6673. doi: 10.1038/srep06673.
Ionogel electrolytes can be fabricated for electrochemical actuators with many desirable advantages, including direct low-voltage control in air, high electrochemical and thermal stability, and complete silence during actuation. However, the demands for active actuators with above features and load-driving ability remain a challenge; much work is necessary to enhance the mechanical strength of electrolyte materials. Herein, we describe a cross-linked supramolecular approach to prepare tough nanocomposite gel electrolytes from HEMA, BMIMBF4, and TiO2 via self-initiated UV polymerization. The tough and stable ionogels are emerging to fabricate electric double-layer capacitor-like soft actuators, which can be driven by electrically induced ion migration. The ionogel-based actuator shows a displacement response of 5.6 mm to the driving voltage of 3.5 V. After adding the additional mass weight of the same as the actuator, it still shows a large displacement response of 3.9 mm. Furthermore, the actuator can not only work in harsh temperature environments (100°C and -10°C) but also realize the goal of grabbing an object by adjusting the applied voltage.
离子凝胶电解质可用于制造具有许多理想优点的电化学致动器，包括在空气中直接进行低压控制、高电化学和热稳定性以及在致动过程中完全静音。然而，对于具有上述特性和负载驱动能力的有源致动器的需求仍然是一个挑战；提高电解质材料的机械强度需要做大量工作。在此，我们描述了一种通过自引发紫外光聚合由甲基丙烯酸羟乙酯（HEMA）、1-丁基-3-甲基咪唑四氟硼酸盐（BMIMBF4）和二氧化钛（TiO2）制备坚韧的纳米复合凝胶电解质的交联超分子方法。坚韧且稳定的离子凝胶正在出现，用于制造类似双电层电容器的软致动器，其可由电诱导的离子迁移驱动。基于离子凝胶的致动器在3.5V驱动电压下显示出5.6mm的位移响应。在添加与致动器相同的额外质量重量后，它仍显示出3.9mm的大位移响应。此外，该致动器不仅可以在恶劣的温度环境（100°C和-10°C）下工作，还可以通过调节施加电压实现抓取物体的目标。
