Hierarchical supramolecules composed of starch-based nanocluster aggregates with light-responsive mechanical strain for remotely rapid and precise actuation

Hierarchical supramolecular systems, characterized by nanoscale sensitivity and macroscopic tangible changes, offer promising perspectives for the design of remotely controllable, rapid, and precise actuation materials, serving as a potential substitution for non-intelligent and complex actuation sw...

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Bibliographic Details
Published in:Carbohydrate polymers 2024-09, Vol.340, p.122314-122314, Article 122314
Main Authors: Wei, Fu-Xiang, Yuan, Xu, Jiang, Feng-Qiong, Wang, Zhen, Deng, Yong-Fu, Xu, Chuan-Hui, Fu, Li-Hua, Lin, Bao-Feng
Format: Article
Language:English
Subjects:
Actuation materials
gels
Hierarchical supramolecules
mechanical stress
Nanoclusters
nanoparticles
Rapid response
Starch
tannins
viscosity
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Summary:Hierarchical supramolecular systems, characterized by nanoscale sensitivity and macroscopic tangible changes, offer promising perspectives for the design of remotely controllable, rapid, and precise actuation materials, serving as a potential substitution for non-intelligent and complex actuation switches. Herein, we reported on the disassembly of orderly and rigid starch helical covalent structures, and their subsequent reassembly into a hierarchical supramolecular gel composed of nanocluster aggregates, integrating supramolecular interactions of three different scales. The incorporation of photo-sensitive FeIIITA, a complex of trivalent iron ions and tannic acid, significantly enhances the photo-responsive strain capacity of the hierarchical supramolecular gel. The supramolecular gel exhibits its features in a rapid light-responsive rate of hardness and viscosity, enabling the actuation of objects within 22 s under light exposure when employed as a remote actuation switch. Meanwhile, this actuation mechanism of the hierarchical supramolecular gel also has a promising perspective in precise control, identifying and actuating one of the two objects in distances of 0.8 mm even smaller scales. Our work provides a reliable reference for replacing complex actuation switches with intelligent materials for remote, rapid, and accurate actuation, and offers valuable insights for actuation in harsh and vacuum outdoor environments. [Display omitted]
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2024.122314