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Mechanochemically Active Soft Robots.

Gregory R Gossweiler1, Cameron L Brown1, Gihan B Hewage1

  • 1Department of Chemistry, Duke University , Durham, North Carolina 27708, United States.

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|September 22, 2015
PubMed
Summary
This summary is machine-generated.

Soft robots can now change color using polymer mechanochemistry, converting mechanical energy into a visible response. This innovation enables new functionalities like camouflage and self-regulation in soft robotic devices.

Keywords:
PDMSmechanochemistrymechanochromicsoft robotspiropyranstimuli-responsive

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Area of Science:

  • Materials Science
  • Robotics
  • Polymer Chemistry

Background:

  • Soft robotics rely on elastomeric structures for actuation and motion.
  • Mechanical energy storage and release are key to soft robot functionality.
  • Current soft robots lack integrated sensing or adaptive capabilities.

Purpose of the Study:

  • To demonstrate covalent polymer mechanochemistry for converting mechanical energy into a mechanochromic response in soft robots.
  • To integrate a spiropyran (SP) mechanophore into poly(dimethylsiloxane) (PDMS) soft robots.
  • To explore new functionalities for soft robots based on mechanochromic responses.

Main Methods:

  • Curing a bis-alkene functionalized spiropyran (SP) mechanophore into a molded PDMS soft robot.
  • Utilizing the stresses and strains inherent in soft robot actuation for SP activation.
  • Observing and analyzing the color change associated with robot movement and object gripping.

Main Results:

  • Successful integration of SP mechanophore into PDMS soft robots (walker and gripper).
  • Demonstrated mechanochromic response (color change) directly linked to robot actuation.
  • SP activation stresses and strains were compatible with soft robot functions.

Conclusions:

  • Covalent polymer mechanochemistry offers a viable pathway for mechanochromic soft robots.
  • Mechanochromic responses open possibilities for camouflage, sensing, and triggered chemical release.
  • This approach facilitates stress mapping for robot design and autonomous feedback control.