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3D-Printed Self-Healing Elastomers for Modular Soft Robotics.

Eliot F Gomez1,2, Shiwanka V Wanasinghe3, Alex E Flynn1

  • 1Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson AFB, Ohio 45433, United States.

ACS Applied Materials & Interfaces
|June 14, 2021
PubMed
Summary
This summary is machine-generated.

A new self-healing elastomer system enables 3D printing of complex soft robots. This advanced material allows for extreme elongation and easy assembly of modular components for functional robotic systems.

Keywords:
3D printingliquid metalmodularself-healingsoft robotics

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Area of Science:

  • Materials Science
  • Robotics Engineering
  • Polymer Chemistry

Background:

  • Current soft robot prototyping is complex and limits geometric design.
  • Existing methods struggle to integrate intricate features and large-scale structures.

Purpose of the Study:

  • To develop a novel self-healing elastomer for advanced soft robotics.
  • To enable facile 3D printing of complex, modular soft robot components.

Main Methods:

  • Vat photopolymerization of a thiol/acrylate elastomer system with dynamic-bond exchange.
  • Incorporation of physical crosslinking and thioether-based dynamic bonds for self-healing.
  • 3D printing of modular components, self-healing integration, and combination with liquid metal electronics.

Main Results:

  • Elastomer achieves up to 1000% elongation with full self-healing over multiple cycles.
  • Demonstrated 3D printing of complex, modular subcomponents with internal channels.
  • Fabricated a high-wattage pneumatic switch and a humanoid-scale robotic gripper using the material.

Conclusions:

  • The developed self-healing elastomer system facilitates the production of highly complex, support-free soft robot parts.
  • This approach represents a paradigm shift in constructing modular soft robotics with enhanced functionality.
  • The material's properties enable reprogrammable shapes and integration with self-healing electronics.