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

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.