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Related Experiment Video

Updated: Sep 18, 2025

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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Architected Liquid Crystal Elastomer Lattices with Programmable Energy Absorption.

Rodrigo Telles1, Julie A Mancini2, Jorge-Luis Barrera2

  • 1John A. Paulson, School of Engineering and, Applied Sciences, and Wyss, Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA, 02138, USA.

Advanced Materials (Deerfield Beach, Fla.)
|June 23, 2025
PubMed
Summary
This summary is machine-generated.

Architected liquid crystal elastomer (LCE) lattices show significantly enhanced energy absorption compared to silicone, with LCE materials being up to 18 times better at high strain rates. This research enables new designs for shape-morphing LCE structures.

Keywords:
active latticesdirect ink writingenergy absorptionliquid crystal elastomersshape morphing

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Mechanical Engineering

Background:

  • Liquid crystal elastomers (LCEs) are advanced materials with unique shape-morphing capabilities.
  • Understanding their mechanical behavior under dynamic loading is crucial for practical applications.

Purpose of the Study:

  • To fabricate and characterize architected LCE lattices.
  • To investigate their energy absorption, stiffness, and shape morphing across a wide range of strain rates.
  • To develop a predictive computational model.

Main Methods:

  • Direct ink writing (DIW) for fabricating LCE lattices with flow-induced alignment.
  • Mechanical testing across six orders of magnitude of strain rates (10^-3 to 10^3 s^-1).
  • Development and validation of a finite element model (FEM).

Main Results:

  • LCE lattices demonstrate superior energy absorption compared to non-mesogenic silicone counterparts.
  • Energy absorption ratios of LCE to silicone reached up to 18-fold at the highest tested strain rate.
  • The FEM accurately predicted the shape-morphing behavior observed experimentally.

Conclusions:

  • Architected LCE lattices offer significant advantages in energy absorption, especially under high strain rates.
  • The developed computational model aids in predicting and designing LCE lattice mechanics.
  • This work paves the way for novel LCE-based materials with tailored properties.