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Four-Dimensional Printing of Stimuli-Responsive Hydrogel-Based Soft Robots

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4D Printing Hybrid Soft Robots Enabled by Shape-Transformable Liquid Metal Nanoparticles.

Xumin Huang¹, Liwen Zhang¹, Jiangyu Hang¹

¹Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.

Advanced Materials (Deerfield Beach, Fla.)

|September 20, 2024

Summary

Researchers developed a 3D printing method for hybrid soft-robots using liquid metal nanoparticles. This technique allows for precise control over mechanical and shape memory properties in soft and rigid components for advanced applications.

Keywords:

4D printing Soft robots additive manufacturing liquid metal nanoparticles shape transformable nanoparticles

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Area of Science:

Materials Science
Robotics
Additive Manufacturing

Background:

Soft robotics mimics natural locomotion for complex movements.
Fabricating hybrid soft-robot structures is difficult due to material and manufacturing limitations.

Purpose of the Study:

To introduce a novel 3D printing method for fabricating hybrid soft-rigid robots.
To develop a functional material toolkit with tunable properties for hybrid robots.

Main Methods:

Developed a direct one-step additive manufacturing (3D printing) approach.
Integrated gallium-based nanoparticles (GNPs) into 3D printing polymers to create inks with tuneable mechanical properties.
Fabricated assembled or one-piece hybrid soft-rigid robots using a single recipe of GNP-integrated inks.

Main Results:

Achieved precise control over mechanical and shape memory properties in hybrid robot structures.
Demonstrated the fabrication of customized hybrid robots with sophisticated designs.
Successfully created hybrid robots for high-precision gripping, bioinspired motion, and hand rehabilitation.

Conclusions:

The novel 3D printing method simplifies the fabrication of complex hybrid soft-robots.
This approach offers a versatile platform for creating advanced soft-robotic devices with tailored functionalities.