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3D-printed photothermal-responsive shape-memory polymer for soft robotic applications.

Kalyan Ghosh1, Sohini Kar-Narayan1

  • 1Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Rd, Cambridge CB3 0FS, UK. kg533@cam.ac.uk.

Chemical Communications (Cambridge, England)
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Summary
This summary is machine-generated.

Researchers developed a photocurable resin for 3D printing shape-memory polymers. This enables 4D printed tools for soft robotics that actuate near room temperature using photothermal heating.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Robotics Engineering

Background:

  • Soft robotics requires advanced materials for complex functionalities.
  • Shape-memory polymers (SMPs) offer unique actuation capabilities.
  • Current 4D printing methods face limitations in resolution and actuation temperature.

Purpose of the Study:

  • To formulate a novel photocurable resin for high-resolution 4D printing of SMPs.
  • To enable the fabrication of customized tools for soft robotics.
  • To demonstrate actuation of 4D printed SMPs at near ambient temperatures.

Main Methods:

  • Development of a photocurable resin tailored for masked stereolithography.
  • 3D printing of customized tools using the formulated resin.
  • Characterization of shape-memory properties and actuation mechanisms.
  • Photothermal heating for programmed shape recovery.

Main Results:

  • Successful formulation of a photocurable resin enabling precise 3D printing.
  • Fabrication of complex, customized tools with shape-memory properties.
  • Demonstration of shape recovery and actuation at near ambient temperatures (e.g., ~30-40°C).
  • Effective programming of actuation via photothermal heating.

Conclusions:

  • The developed photocurable resin is suitable for 4D printing advanced SMPs.
  • Customized 4D printed tools can be fabricated for soft robotics applications.
  • Near-ambient temperature actuation is achievable, expanding the utility of SMPs in soft robotics.