Designed Autonomic Motion in Heterogeneous Belousov–Zhabotinsky (BZ)-Gelatin Composites by Synchronicity

Document Type

Article

Publication Date

Summer 6-13-2013

Publication Source

Advanced Functional Materials

Volume Number

23

Issue Number

22

First Page

2835

Last Page

2842

Publisher

Wiley-VCH

ISSN

1616-301X

Abstract

Critical technologies from medicine to defense are highly dependent on advanced composite materials. Increasingly there is a greater demand for materials with expanded functionality. The state of the art includes a wide range of responsive composites capable of impressive structural feats such as externally triggered shape morphing. Here a different composite concept is presented, one in which a portion of the constituent materials feed off of ambient energy and dynamically couple to convert it to mechanical motion in a cooperative, biomimetic fashion. Using a recently developed self-oscillating gel based on gelatin and the oscillating Belousov–Zhabotinsky (BZ) reaction, a technique is demonstrated for producing continuous patterned heterogeneous BZ hydrogel composites capable of sustained autonomic function. The coupling between two adjacent reactive patches is demonstrated in an autonomic cantilever actuator which converts chemical energy into amplified mechanical motion. The design of heterogeneous BZ gels for motion using a basic finite element model is discussed. This work represents notable progress toward developing internally responsive, bio-inspired composite materials for constructing modular autonomic morphing structures and devices.

Keywords

Active Matter, Actuators, Hydrogels, Additive Manufacturing, Oscillating Reactions

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