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Microfluidic Preparation of Liquid Crystalline Elastomer Actuators
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Liquid Crystal Elastomer Electric Locomotives.

Meng Wang1, Zhi-Wen Cheng1, Bo Zuo1

  • 1School of Chemistry and Chemical Engineering, Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, Institute of Advanced Materials, Southeast University, Nanjing, 211189, China.

ACS Macro Letters
|June 1, 2022
PubMed
Summary
This summary is machine-generated.

We developed a novel electro-driven soft actuator using liquid crystal elastomer/carbon black (LCE/CB) that rolls along a conductive track. This wire-free system offers a new direction for soft robotics and electronic devices.

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Area of Science:

  • Materials Science
  • Robotics
  • Soft Actuators

Background:

  • Liquid Crystal Elastomers (LCEs) are advanced materials with unique actuation properties.
  • Integrating conductive fillers like carbon black (CB) into LCEs enables electro-driven actuation.
  • Existing electro-driven LCE systems often face limitations due to electrical wiring.

Purpose of the Study:

  • To present a novel electro-driven cylindrical actuator system.
  • To demonstrate a wire-free actuation mechanism for LCE materials.
  • To explore potential applications in soft robotics and electric devices.

Main Methods:

  • Fabrication of a bilayered LCE/CB soft actuator with a circular LCE band and U-shaped CB conductive regions.
  • Utilizing Joule heating of CB for inhomogeneous stress generation within the LCE.
  • Employing a stationary copper conductive track for dynamic electrical connection.

Main Results:

  • The LCE/CB actuator achieved a forward rolling speed of 1.6 mm/s.
  • Actuation was powered by a 50 V direct current supply.
  • The dynamic connection to the track eliminated the need for complex wiring.

Conclusions:

  • The developed electro-driven LCE/CB actuator system is effective for cylindrical rolling motion.
  • This wire-free approach overcomes limitations of traditional LCE actuation setups.
  • The system shows promise for advancing soft robots and electronic devices.