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Monolithic 3D Printing of Origami-Inspired Soft Robotics from Sustainable Bio-Based Resin.

Ramin Montazeri1,2, Hugo de Souza Oliveira3,4, Xin Li3,4

  • 1Laboratory of Process Technology, NeptunLab, Department of Microsystems Engineering (IMTEK), University of Freiburg, Freiburg, Germany.

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Summary
This summary is machine-generated.

This study introduces a novel, photocurable, bio-based resin for 3D printing soft robots. The sustainable material, derived from soybean oil, enables the fabrication of functional soft robotic grippers and actuators.

Keywords:
bio‐based materialshigh resolution 3D printingorigami actuatorssoft grippersoft roboticssustainable materials

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Area of Science:

  • Materials Science
  • Robotics
  • Biotechnology

Background:

  • Soft robotics offers safe, adaptable machines using compliant materials.
  • Current soft robot manufacturing relies on petroleum-based polymers and unsustainable resins for 3D printing.
  • There is a need for sustainable materials in soft robotics fabrication.

Purpose of the Study:

  • To develop a photocurable, bio-based resin for monolithic soft robot fabrication.
  • To demonstrate the use of this resin in creating origami-inspired actuators and grippers.
  • To address the sustainability gap in soft robotics manufacturing.

Main Methods:

  • Formulation of a photocurable resin using soybean oil as a renewable precursor.
  • Fabrication of soft robots using Digital Light Processing (DLP) 3D printing.
  • Characterization of material properties (Young's modulus, elongation at break) and actuator performance (cyclic testing).

Main Results:

  • A bio-based resin with a Young's modulus of 18.9 MPa and 19.6% elongation at break was developed.
  • Origami-inspired vacuum-actuated actuators demonstrated functionality and durability (2000 cycles).
  • A monolithic soft robotic gripper was fabricated and demonstrated successful object grasping in air and underwater.

Conclusions:

  • A sustainable, bio-based resin enables the fabrication of complex soft robots via DLP 3D printing.
  • Origami-based designs compensate for lower material elongation, enabling actuator function.
  • This work presents a viable eco-friendly alternative for soft robotics manufacturing.