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All-Solid-State Electrochemical Artificial Muscles Enabled by Magnetically Aligned Ionic Liquid Crystal Elastomers.

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This summary is machine-generated.

Ionic liquid crystal elastomers (LCEs) enhance artificial muscle performance, offering high conductivity and actuation. These novel LCE muscles demonstrate superior strength and efficiency, even in vacuum conditions.

Keywords:
artificial musclescarbon nanotubecoiled fiberselectrochemical actuationliquid crystal elastomers

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Area of Science:

  • Materials Science
  • Polymer Science
  • Robotics

Background:

  • Liquid crystal elastomers (LCEs) are promising for artificial muscles due to their actuation capabilities.
  • A key limitation of LCEs is reduced mechanical strength at elevated temperatures.
  • High ionic conductivity is crucial for efficient electrochemical actuation in artificial muscles.

Purpose of the Study:

  • To design and synthesize an ionic LCE with enhanced mechanical properties and ionic conductivity.
  • To investigate the performance of LCE-based all-solid-state electrochemical artificial muscles.
  • To explore potential applications in vacuum environments and smart textiles.

Main Methods:

  • Grafting ionic chain extenders into the LCE network to create ionic LCE.
  • Orienting the ionic LCE mesophase using a magnetic field to create monodomain structures.
  • Integrating carbon nanotube (CNT) coiled fibers as actuating host materials.
  • Evaluating the electrochemical actuation performance, including contraction stroke and rate.

Main Results:

  • The ionic LCE exhibited a 200% increase in ionic conductivity (47.5 mS m-1) compared to polydomain ionic LCE.
  • CNT/monodomain ionic LCE artificial muscles achieved a maximum contraction stroke of 20.5% and a rate of 18.0%/min.
  • The artificial muscles demonstrated negligible performance attenuation in vacuum conditions.
  • Successful demonstration of artificial muscles rotating solar panels.

Conclusions:

  • The developed ionic LCE offers a promising solution to improve the mechanical strength and conductivity of LCE-based artificial muscles.
  • Monodomain ionic LCEs integrated with CNTs show superior electrochemical actuation performance.
  • These artificial muscles are suitable for applications in vacuum environments and wearable smart textiles.