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Programmable and Self-Healable Liquid Crystal Elastomer Actuators Based on Halogen Bonding.

Hongshuang Guo1, Chen Liang2, Tero-Petri Ruoko1

  • 1Faculty of Engineering and Natural Sciences, Tampere University P.O. Box 541, 33101, Tampere, Finland.

Angewandte Chemie (International Ed. in English)
|September 11, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed novel shape-changing liquid crystal elastomers (LCEs) using halogen bonding. These smart materials offer programmable shape-morphing and self-healing capabilities for advanced soft robotics.

Keywords:
Halogen BondLiquid Crystal ElastomerProgrammableSelf-HealingSoft Actuator

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Area of Science:

  • Materials Science
  • Soft Robotics
  • Polymer Chemistry

Background:

  • Shape-changing polymeric materials are crucial for bioinspired soft robotics.
  • Current limitations include versatility in shape-morphing and combining reversible actuation with self-healing.

Purpose of the Study:

  • To develop versatile, self-healing liquid crystal elastomers (LCEs) for advanced soft actuators.
  • To explore halogen bonding as a dynamic crosslinking strategy for programmable materials.

Main Methods:

  • Incorporation of diiodotetrafluorobenzene molecules as dynamic supramolecular crosslinks into LCEs.
  • Mechanical programming of material shape.
  • Stimulation (thermal or photothermal) for actuation and self-healing.

Main Results:

  • Demonstrated arbitrary shape-programming of halogen-bonded LCEs.
  • Achieved reversible actuation and self-healing under mild conditions.
  • Proof-of-concept soft robotic motions (crawling, rolling) with programmed velocities were realized.

Conclusions:

  • Halogen bonding is a viable strategy for creating dynamic supramolecular crosslinks in LCEs.
  • These materials offer a promising platform for developing advanced soft actuators with programmable and self-healing properties.