Tunable anisotropic structural aramid triboelectric aerogels enabled by magnetic manipulationa
writer：Mingchao Chi, Song Zhang, Tao Liu, Yanhua Liu, Bin Luo, Jinlong Wang, Chenchen Cai, Xiangjiang Meng,
keywords：magnetic alignment, self-powered, thermal charge stability, triboelectricaerogels, triboelectric nanogenerators
source：期刊
specific source：Advanced Functional Materials
Issue time：2023年
Material designs for wearable sensors are increasingly important due to variable application scenarios and environmental disturbances. The high temperatures pose a significant challenge to the performance of sensing materials. The reasonable anisotropic structure in materials is recognized as a promising approach to address this challenge. Precise control of the orientation of the material remains difficult, owing to the entropy effect. In this work, a tunable anisotropic triboelectric aerogel via an in situ coupled magnetic alignment and protonation reduction strategy is demonstrated. The designed orientation with a fitting degree of 98% can effectively suppress electron thermionic emission, which enables the surface charge density to reach 75 μC m?2 at 300 °C. Such a perfect coordination between self-powered sensing and thermostability innovates multifunctional wearable sensing design at high temperatures, allowing aramid-based aerogel to be a candidate for advanced sensing materials for applications in the military and aerospace fields.