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

Autor: Wei FX; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China., Yuan X; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China., Jiang FQ; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China., Wang Z; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China., Deng YF; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China., Xu CH; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China., Fu LH; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China., Lin BF; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China. Electronic address: lbf@gxu.edu.cn.
Jazyk: angličtina
Zdroj: Carbohydrate polymers [Carbohydr Polym] 2024 Sep 15; Vol. 340, pp. 122314. Date of Electronic Publication: 2024 May 25.
DOI: 10.1016/j.carbpol.2024.122314
Abstrakt: 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 Fe III TA, 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.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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