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Printing Untethered Self-Reconfigurable, Self-Amputating Soft Robots from Recyclable Self-Healing Fibers.

Yidan Gao1, Wei Tang1, Yiding Zhong1

  • 1State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310058, China.

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Summary

This study introduces novel soft fibers for self-healing, reconfigurable, and self-amputating soft robots. These eco-friendly, printable fibers enable untethered motion and wireless repair, advancing sustainable robotics.

Keywords:
3D printingrecyclable self‐healing fibersself‐amputationself‐reconfigurationuntethered soft robots

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Area of Science:

  • Robotics and Materials Science
  • Soft Robotics
  • Sustainable Materials

Background:

  • Existing research on soft robot self-reconfiguration and self-amputation primarily addresses modular designs and inter-module connections.
  • This study shifts focus to the material properties enabling these behaviors in individual soft robots.

Purpose of the Study:

  • To develop a novel soft fiber material for advanced soft robot functionalities.
  • To establish an integrated printing strategy for fabricating self-healing, reconfigurable, and self-amputating soft robots.
  • To demonstrate the versatility and sustainability of the proposed soft fiber technology.

Main Methods:

  • Development of soft fibers incorporating hot melt adhesive, magnetizable, and ferroferric oxide microparticles within a thermoplastic polyurethane matrix.
  • Utilizing eddy current heating for wireless self-healing and reversible bonding, and magnetic fields for actuation.
  • Implementation of an integrated material-structure-actuation printing strategy for robot fabrication.

Main Results:

  • The developed soft fibers enable wireless self-healing and actuation via magnetic fields.
  • Fabricated soft robots demonstrated untethered motion, self-healing, self-reconfiguration, and self-amputation capabilities.
  • Printable, recyclable, and mass-manufacturable soft fibers were achieved.

Conclusions:

  • The proposed soft fibers and integrated printing strategy offer a universal approach to sustainable, eco-friendly soft robotics.
  • This material-centric approach facilitates the creation of untethered, self-healing, and self-reconfigurable soft robots adaptable to diverse environments and tasks.
  • The technology opens new avenues for advanced soft robot design and manufacturing.