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Free-form Light Actuators — Fabrication and Control of Actuation in Microscopic Scale

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Published on: May 25, 2016

Liquid-Crystal-Elastomer-Based Dissipative Structures by Digital Light Processing 3D Printing.

Nicholas A Traugutt¹, Devesh Mistry¹, Chaoqian Luo¹

¹University of Colorado Denver, 1200 Larimer Street, Campus Box 112, Denver, CO, 80217, USA.

Advanced Materials (Deerfield Beach, Fla.)

|June 9, 2020

Summary

This summary is machine-generated.

Researchers developed a new 3D printable liquid crystal elastomer (LCE) resin for advanced energy-dissipative devices. This novel material demonstrates significantly enhanced mechanical energy absorption compared to conventional elastomers.

Keywords:

3D printing Digital Light Processing energy-dissipative lattices liquid crystal elastomers mechanical dissipation

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Area of Science:

Materials Science
Additive Manufacturing
Polymer Chemistry

Background:

Traditional manufacturing methods limit the creation of complex hierarchical structures.
Digital Light Processing (DLP) 3D printing allows for micro- and macroscopic architectural control.
Extending structural hierarchy to the mesoscopic scale is key for optimizing device performance.

Purpose of the Study:

To develop a photocurable, DLP-printable main-chain liquid crystal elastomer (LCE) resin.
To fabricate and characterize complex, high-resolution energy-dissipative devices using the LCE resin.
To investigate the energy dissipation properties of 3D-printed LCE structures.

Main Methods:

Synthesis of a novel photocurable main-chain liquid crystal elastomer (LCE) resin.
Fabrication of various complex, high-resolution energy-dissipative devices via Digital Light Processing (DLP) 3D printing.
Compressive mechanical testing of 3D-printed LCE lattice structures.

Main Results:

3D-printed LCE lattice structures exhibited 12 times greater rate-dependence in stress-strain response.
The LCE structures demonstrated up to 27 times greater strain-energy dissipation compared to commercial elastomer resins.
The study highlights the significant, yet overlooked, energy-dissipation capabilities of LCEs.

Conclusions:

A DLP-printable LCE resin enables the creation of advanced energy-dissipative devices with hierarchical structures.
These LCE-based devices offer superior mechanical energy absorption properties.
The findings pave the way for developing novel high-energy-absorbing applications.