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Fabrication Process of Silicone-based Dielectric Elastomer Actuators

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Published on: February 1, 2016

Bio-Inspired Hydrogel-Elastomer Actuator with Bidirectional Bending and Dynamic Structural Color.

Yongqing Xia¹, Yaru Meng¹, Ronghua Yu¹

¹Department of Biological and Bioenergy Chemical Engineering, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China.

Molecules (Basel, Switzerland)

|October 14, 2023

Summary

Researchers developed a smart hydrogel actuator mimicking octopuses, capable of bidirectional bending and simultaneous color change. This novel elastomer/hydrogel bilayer actuator offers programmable deformation and tunable structural color, inspired by nature.

Keywords:

gripper hydrogel actuator structural color thermoresponsive hydrogel/microgel

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Area of Science:

Materials Science
Biomimetic Engineering
Soft Robotics

Background:

Nature inspires the development of advanced materials like color-tunable soft actuators.
Existing hydrogel actuators often exhibit limited, one-directional movement.
Simultaneous shape-shifting and color change in actuators remains a significant challenge.

Purpose of the Study:

To create a facile method for fabricating a smart hydrogel actuator with bidirectional bending and simultaneous color change.
To develop an actuator that mimics the natural actuating behaviors of creatures, such as octopuses.
To explore the potential of thermoresponsive microgels as photonic crystal blocks in hydrogel actuators.

Main Methods:

Fabrication of an elastomer/hydrogel bilayer actuator.
Decoration of the hydrogel layer with thermoresponsive microgels.
Investigation of the actuator's response to temperature variations (20 °C to 60 °C).
Tuning of layer thickness ratio and hydrogel composition to control bending and color.

Main Results:

The actuator demonstrated bidirectional bending from -360° to 270° with temperature changes.
Simultaneous structural color changes from red to green to blue across the visible spectrum.
Programmable control over bending direction and degree was achieved.
The actuator successfully mimicked natural actuating behaviors.

Conclusions:

A novel, facile method for creating a color-tunable, bidirectionally bending hydrogel actuator was successfully developed.
The developed actuator exhibits advanced capabilities in programmable deformation and simultaneous color change, inspired by natural organisms.
This research opens new avenues for soft robotics and smart materials with biomimetic functionalities.