Multi-functional stimuli-responsive biomimetic flower assembled from CLCE and MOF-based pedals  

作　　者：Dongpeng Sun Lin Zheng Xuejing Xu Kaiyang Du Zhiqiang An Xuan Zhou Li Chen Jiliang Zhu Dong Chen 

机构地区：[1]Department of Applied Physics,Hebei University of Technology,Tianjin 300401,China [2]College of Energy Engineering and State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou 310027,China

出　　处：《Chinese Chemical Letters》2023年第1期517-522,共6页中国化学快报（英文版）

基　　金：The financial support of this work by the Natural Science Foundation of Hebei province of China (No. F2020202015)。

摘　　要：Simulating the structures and behaviors of living organisms are of great significance to develop novel multi-functional intelligent devices. However, the development of biomimetic devices with complex deformable structures and synergistic properties is still on the way. Herein, we propose a simple and effective approach to create the multi-functional stimuli-responsive biomimetic devices with independently pre-programmable colorful visual patterns, complex geometries and morphable modes. The metal organic framework(MOF)-based composite film acts as a rigidity actuation substrate to support and mechanically guide the spatial configuration of the soft chiral nematic liquid crystal elastomer(CLCE) sheet. We can directly program the structural color of the CLCE sheet by adjusting the thickness distribution without tedious chemical modification. By using this coordination strategy, we fabricate an artificial flower, which exhibits a synergistic effect of both shape transformation and color change like paeonia ‘Coral Sunset’at different flowering stages, and can even perform different flowering behaviors by bending, twisting and curling petals. The assembled bionic flower is innovatively demonstrated to respond to local stimuli of humidity, heat or ultraviolet irradiation. Therefore, the spatial assembly of CLCE combined with functional MOF materials has a wide range of potential application in multi-functional integrated artificial systems.

关 键 词：3D assembly Biomimetic structure Synergistic responses Cholesteric liquid crystal elastomer Bragg reflection 

分 类 号：O62[理学—有机化学]