Hydrogel actuators are important for designing stimuli-sensitive soft robots. They generate mechanical motion by exploiting compartmentalized (de)swelling in response to a stimulus. However, classical switching methods, such as manually lowering or increasing the pH, cannot provide more complex autonomous motions. By coupling an autonomously operating pH-flip with programmable lifetimes to a hydrogel system containing pH-responsive and non-responsive compartments, autoonenomous forward and backward motion as well as more complex tasks, such as interlocking of "puzzle pieces" and collection of objects are realized. All operations are initiated by one simple trigger, and the devices operate in a "fire and forget" mode. More complex self-regulatory behavior is obtained by adding chemo-mechano-chemo feedback mechanisms. Due to its simplicity, this method shows great potential for the autonomous operation of soft grippers and metamaterials.

Autonomous Soft Robots Empowered by Chemical Reaction Networks / Fusi, Giorgio; Del Giudice, Daniele; Skarsetz, Oliver; DI STEFANO, Stefano; Walther, Andreas. - In: ADVANCED MATERIALS. - ISSN 0935-9648. - 35:e2209870(2023), pp. 1-8. [10.1002/adma.202209870]

Autonomous Soft Robots Empowered by Chemical Reaction Networks

Del Giudice, Daniele;Di Stefano, S
;
2023

Abstract

Hydrogel actuators are important for designing stimuli-sensitive soft robots. They generate mechanical motion by exploiting compartmentalized (de)swelling in response to a stimulus. However, classical switching methods, such as manually lowering or increasing the pH, cannot provide more complex autonomous motions. By coupling an autonomously operating pH-flip with programmable lifetimes to a hydrogel system containing pH-responsive and non-responsive compartments, autoonenomous forward and backward motion as well as more complex tasks, such as interlocking of "puzzle pieces" and collection of objects are realized. All operations are initiated by one simple trigger, and the devices operate in a "fire and forget" mode. More complex self-regulatory behavior is obtained by adding chemo-mechano-chemo feedback mechanisms. Due to its simplicity, this method shows great potential for the autonomous operation of soft grippers and metamaterials.
2023
autonomous materials; chemical reaction networks; hydrogel actuators; life-like materials; soft robotics
01 Pubblicazione su rivista::01a Articolo in rivista
Autonomous Soft Robots Empowered by Chemical Reaction Networks / Fusi, Giorgio; Del Giudice, Daniele; Skarsetz, Oliver; DI STEFANO, Stefano; Walther, Andreas. - In: ADVANCED MATERIALS. - ISSN 0935-9648. - 35:e2209870(2023), pp. 1-8. [10.1002/adma.202209870]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1670607
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