Bio-inspired shape-memory structural color hydrogel film

A novel shape-memory structural color hydrogel film is presented by introducing shape memory polymers (SMPs) into synthetic inverse opal scaffold structure. The film not only exhibits the shape transformations and color responsiveness performance, but also possesses the feature of light-controlled r...

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Bibliographic Details
Published in:Science bulletin (Beijing) 2022-03, Vol.67 (5), p.512-519
Main Authors: Wang, Yu, Zhang, Zhuohao, Chen, Hanxu, Zhang, Han, Zhang, Hui, Zhao, Yuanjin
Format: Article
Language:English
Subjects:
Bio-inspired
Hydrogel
Responsive
Shape-memory
Structural color
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Summary:A novel shape-memory structural color hydrogel film is presented by introducing shape memory polymers (SMPs) into synthetic inverse opal scaffold structure. The film not only exhibits the shape transformations and color responsiveness performance, but also possesses the feature of light-controlled reversible deformation with synchronous structural color variation, which has highly potential values in the field of soft robotics. [Display omitted] Structural colors, derived from existing natural creatures, have aroused widespread attention in the materials regulation for different applications. Here, inspired by the color adjusting mechanism of hummingbird, we present a novel shape-memory structural color hydrogel film by introducing shape memory polymers (SMPs) into synthetic inverse opal scaffold structure. The excellent flexibility as well as the inverse opal structure of the hydrogel films imparts them with stable stretchability and brilliant structural colors. Benefiting from the transient structural anisotropy of copolymers, the hybrid films are possessed with shape-morphing behaviors capability. Based on the shape transformations and color responsiveness performance, we have demonstrated diverse structural color actuators with complex shapes for different tasks. Notably, as the photothermal responsive graphene quantum dots were integrated into the hydrogel, the hybrid films could also be endowed with the feature of light-controlled reversible deformation with synchronous structural color variation. These features demonstrate that the presented shape-memory structural color hydrogel film is valuable for soft robotics with multi-functions of sensing, communication and disguise.
ISSN:2095-9273
DOI:10.1016/j.scib.2021.10.010