State Key Laboratory of Medicinal Chemical Biology, College of Chemistry, Nankai University, Tianjin, 300071, China.
Life and Health Intelligent Research Institute, Tianjin University of Technology, Tianjin, 300384, China.
Angew Chem Int Ed Engl. 2023 Jan 23;62(4):e202216318. doi: 10.1002/anie.202216318. Epub 2022 Dec 14.
Regarding the global energy crisis, it is of profound significance to develop spontaneous power generators that harvest natural energy. Fabricating humidity-responsive actuators that can conduct such energy transduction is of paramount importance. Herein, we incorporate covalent organic frameworks with flexible polyethylene glycol to fabricate rigid-flexible coupled membrane actuators. This strategy significantly improves the mechanical properties and humidity-responsive performance of the actuators, meanwhile, the existence of ordered structures enables us to unveil the actuation mechanism. These high-performance actuators can achieve various actuation applications and exhibit interesting self-oscillation behavior above a water surface. Finally, after being coupled with a piezoelectric film, the bilayer device can spontaneously output electricity over 2 days. This work paves a new avenue to fabricate rigid-flexible coupled actuators for self-sustained energy transduction.
关于全球能源危机，开发能够利用自然能量的自发式发电机具有深远意义。制造能够进行这种能量转换的湿度响应致动器至关重要。在这里，我们将共价有机框架与柔性聚乙二醇结合起来，制造出刚柔耦合的膜致动器。这种策略显著提高了致动器的机械性能和湿度响应性能，同时，有序结构的存在使我们能够揭示致动机制。这些高性能致动器可以实现各种致动应用，并在水面上方表现出有趣的自激振荡行为。最后，与压电薄膜耦合后，双层器件可以在 2 天内自发地输出电力。这项工作为制造用于自持续能量转换的刚柔耦合致动器开辟了新途径。
