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Related Experiment Video

Updated: Oct 23, 2025

Microfluidic Preparation of Liquid Crystalline Elastomer Actuators
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Microfluidic Preparation of Liquid Crystalline Elastomer Actuators

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Electrospun liquid crystal elastomer microfiber actuator.

Qiguang He1, Zhijian Wang1, Yang Wang2

  • 1Department of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, CA 92093, USA.

Science Robotics
|August 26, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed advanced liquid crystal elastomer (LCE) microfiber actuators using electrospinning. These durable microfibers offer large strain, fast response, and high power, enabling novel micro-robotics and microfluidic devices.

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Area of Science:

  • Materials Science
  • Polymer Science
  • Nanotechnology

Background:

  • Fiber actuators are crucial in nature and engineering.
  • Existing actuators face challenges in achieving large strain, fast response, and high power density simultaneously.

Purpose of the Study:

  • To fabricate high-performance liquid crystal elastomer (LCE) microfiber actuators.
  • To investigate their actuation properties, durability, and potential applications.

Main Methods:

  • Facile electrospinning technique for LCE microfiber fabrication.
  • Characterization of actuation strain, response speed, and power density.
  • Durability testing under cyclic loading at elevated temperatures.
  • Integration with polydopamine coating for laser-controlled actuation.

Main Results:

  • Achieved large actuation strain (~60%) and fast response speed (<0.2 s) due to nematic-isotropic phase transition.
  • Demonstrated high power density (400 W/kg) and exceptional durability (>10^6 cycles).
  • Exhibited self-oscillatory behavior and precise, remote control via near-infrared laser photothermal effect.

Conclusions:

  • Electrospun LCE microfibers represent a significant advancement in actuator technology.
  • These microfibers offer a unique combination of performance metrics and durability.
  • Successfully demonstrated applications in micro-tweezers, micro-robots, and light-powered microfluidic pumps.