Ma Jiazhe, Yang Yanzhao, Valenzuela Cristian, Zhang Xuan, Wang Ling, Feng Wei
School of Materials Science and Engineering, Tianjin University, Tianjin, 300350.
Tianjin Key Laboratory of Composite and Functional Materials, Tianjin, 300350, P. R. China.
Angew Chem Int Ed Engl. 2022 Feb 21;61(9):e202116219. doi: 10.1002/anie.202116219. Epub 2022 Jan 14.
Endowing a cholesteric liquid crystal elastomer (CLCE) exhibiting a helicoidal nanostructure with dynamically tailorable functionalities is of paramount significance for its emerging applications in diverse fields such as adaptive optics and soft robotics. Here, a mechanochromic, shape-programmable and self-healable CLCE is judiciously designed and synthesized through integrating dynamic covalent boronic ester bonds into the main-chain CLCE polymer network. The circularly polarized reflection of CLCEs can be reversibly and dynamically tuned across the entire visible spectrum by mechanical stretching. Thanks to the introduction of dynamic boronic ester bonds, the CLCEs were found to show robust reprogrammable and self-healing capabilities. The research disclosed herein can provide new insights into the development of 4D (color and 3D shape) programmable photonic actuators towards bioinspired camouflage, adaptive optical systems, and next-generation intelligent machines.
赋予具有螺旋纳米结构的胆甾相液晶弹性体（CLCE）以动态可定制功能，对于其在自适应光学和软机器人等不同领域的新兴应用至关重要。在此，通过将动态共价硼酸酯键整合到主链CLCE聚合物网络中，精心设计并合成了一种机械变色、形状可编程且可自愈的CLCE。通过机械拉伸，CLCE的圆偏振反射可以在整个可见光谱范围内进行可逆且动态的调谐。由于引入了动态硼酸酯键，发现CLCE具有强大的可重新编程和自愈能力。本文所披露的研究可为开发用于仿生伪装、自适应光学系统和下一代智能机器的4D（颜色和3D形状）可编程光子致动器提供新的见解。
