4D printing of carbon-fiber-reinforced liquid crystal elastomers for self-deployable solar panels

Faxin Wang ¹, Ran Bi ¹, Yuanhao Chen ¹

⁰School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P. R. China. lwang17@tju.edu.cn.

Materials Horizons +

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May 6, 2025

View abstract on PubMed

Summary

We developed 4D printed short-carbon-fiber-reinforced liquid crystal elastomers (SCF-LCEs) with enhanced strength and strain for smart actuation. These materials enable programmable shape-morphing and self-deployable structures, like adaptive solar panels.

Area Of Science

Materials Science
Polymer Science
Mechanical Engineering

Background

Deployable structures require advanced smart actuation materials with high mechanical strength and programmable shape-morphing.
Existing materials often lack the necessary combination of strength, strain, and programmability for advanced applications.

Purpose Of The Study

To develop a novel short-carbon-fiber-reinforced liquid crystal elastomer (SCF-LCE) via 4D printing for enhanced mechanical properties and adaptive actuation.
To demonstrate the potential of SCF-LCEs in creating programmable, self-deployable structures.

Main Methods

Fabrication of SCF-LCEs using 4D printing, orienting mesogens and short carbon fibers (SCF) via extrusion shear force to create monodomain matrix materials.
Incorporation of passive layers onto SCF-LCEs to enable programmable deformations.
Integration of SCF-LCE bilayer actuators with solar panels to demonstrate a self-adaptive unfolding system.

Main Results

The fabricated SCF-LCE exhibited enhanced tensile strength (13.5 MPa) and high actuation strain (27%).
The material demonstrated adaptive photoresponsive actuation.
Programmable deformations and self-deployable structures were achieved through the incorporation of passive layers.

Conclusions

4D printed SCF-LCEs offer a promising approach for creating advanced smart actuation materials with superior mechanical properties and large driving strain.
These materials are suitable for applications in space deployable structures, soft robotics, and artificial muscles.