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Related Experiment Video

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Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers
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Rotational Multimaterial 3D Printing of Soft Robotic Matter With Embedded Asymmetrical Pneumatics.

Jackson K Wilt1, Natalie M Larson1,2, Jennifer A Lewis1,3

  • 1John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, USA.

Advanced Materials (Deerfield Beach, Fla.)
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Summary

Researchers developed a new 3D printing method for soft robotic materials with embedded pneumatic channels. This technique allows for programmable shape morphing and rapid fabrication of complex soft robots.

Keywords:
3D printingelastomerspneumaticssoft robots

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Area of Science:

  • Soft robotics
  • Materials science
  • Additive manufacturing

Background:

  • Soft robotic matter is crucial for applications like shape morphing, actuation, and wearable devices.
  • Current fabrication methods can be complex and time-consuming.

Purpose of the Study:

  • To develop a facile fabrication method for soft robotic materials with embedded pneumatics.
  • To achieve programmable shape morphing behavior in soft robots.

Main Methods:

  • Utilized rotational multimaterial 3D printing to create asymmetrical core-shell filaments.
  • Patterned elastomeric shells with fugitive channels in various dimensions (1D, 2D, 2.5D).
  • Precisely controlled printing parameters (nozzle design, rotation/extrusion rates, print path) to define channel characteristics.

Main Results:

  • Successfully fabricated soft robotic materials with embedded pneumatic channels.
  • Demonstrated control over channel orientation, shape, and cross-sectional area.
  • Generated complex print paths for soft robots, including hand-inspired grippers, using a Fermat spiral approach.

Conclusions:

  • The integrated design and printing approach enables rapid fabrication of soft robotic matter.
  • The method allows for on-demand, programmable shape morphing transitions.
  • This technique holds potential for advancing the development of versatile soft robots.