Sun Linchao, Che Lixuan, Li Ming, Chen Kai, Leng Xu, Long Yaojia, Guo Xiaoxi, Palma Matteo, Lu Yao
Department of Chemistry, School of Physical and Chemical Sciences, Queen Mary University of London, London, E1 4NS, UK.
State Key Laboratory of Structural Analysis Optimization and CAE Software for Industrial Equipment, Department of Engineering Mechanics, School of Mechanics and Aerospace Engineering, Dalian University of Technology, Dalian, 116024, P. R. China.
Small. 2024 Dec;20(51):e2406832. doi: 10.1002/smll.202406832. Epub 2024 Oct 6.
MXene-based soft actuators have attracted increasing attention and shown competitive performance in various intelligent devices such as supercapacitors, bionic robots and artificial muscles. However, the development of robust MXene-based actuators with multi-stimuli responsiveness remains challenging. In this study, a nacre-like structure soft actuator based on MXene and sodium alginate (SA) composite films is prepared using a straightforward solvent casting self-assembly method, which not only enhances the mechanical performance (tensile strength of 72 MPa) but also diversifies the stimuli responsiveness of the material. The composite actuators can be powered by external stimuli from renewable energy sources, from moisture inducing a maximum bending angle of 190 degrees at a relative humidity (RH) of 91%, and sunlight irradiation generating a maximum curvature of 1.45 cm under 100 mW cm. The feasibility of practical applications, including moisture-responsive flowers and walkers, sunlight-responsive oscillators, and smart switches, is demonstrated through comprehensive experimental characterization and performance evaluation. The work presented here provides insight into the design of robust actuators via the utilization and conversion of environmentally renewable energy sources.
基于MXene的软驱动器在超级电容器、仿生机器人和人造肌肉等各种智能设备中受到越来越多的关注，并展现出具有竞争力的性能。然而，开发具有多刺激响应性的坚固耐用的基于MXene的驱动器仍然具有挑战性。在本研究中，采用简单的溶液浇铸自组装方法制备了一种基于MXene和海藻酸钠（SA）复合膜的类珍珠层结构软驱动器，该方法不仅提高了机械性能（拉伸强度达72MPa），还使材料的刺激响应性多样化。复合驱动器可由可再生能源的外部刺激提供动力，湿度在相对湿度（RH）为91%时可诱导最大弯曲角度达190度，阳光照射在100mW/cm²下可产生最大曲率为1.45cm。通过全面的实验表征和性能评估，证明了包括湿度响应花朵和步行器、阳光响应振荡器以及智能开关等实际应用的可行性。本文介绍的工作通过利用和转换环境可再生能源，为坚固驱动器的设计提供了思路。
