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Updated: Jun 4, 2026
Microfluidic Preparation of Liquid Crystalline Elastomer Actuators
Published on: May 20, 2018
Highly Programmable Liquid Crystalline Polyurethane/MXene Hybrids for Large-Strain, High-Work-Capacity Artificial
Yu-Xi Zhao1, Xi Yin1, Yun-Kai Wang1
1The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE), National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), College of Chemistry, State Key Laboratory of Advanced Polymer Materials, Sichuan University, Chengdu, China.
Researchers developed a novel liquid-crystalline polyurethane/MXene hybrid network for soft actuators. This material achieves high stress and strain for complex motions, offering a versatile platform for artificial muscles and intelligent applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Soft Robotics
Background:
- Liquid crystal elastomers (LCEs) offer rapid response and reversible deformation for soft actuators.
- A key challenge is achieving high actuation stress and strain simultaneously for complex movements.
Purpose of the Study:
- To develop a novel material overcoming the trade-off between actuation stress and strain in LCEs.
- To create robust thermal- and light-driven actuators with programmable shape-morphing capabilities.
Main Methods:
- Fabrication of a liquid-crystalline polyurethane (LCPU)/MXene hybrid network via in situ polymerization.
- Incorporation of polydimethylsiloxane (PDMS) for deformability and MXene for reinforcement and photothermal conversion.
- Utilizing dynamic hydrogen bonding for network reconfigurability and shape programmability.
Main Results:
- The LCPU/MXene actuators demonstrated high thermal-driven stress (0.91 MPa at 88% strain) and NIR-driven stress (1.58 MPa).
- Achieved an exceptionally high work capacity of 546 kJ m⁻³.
- Demonstrated programmable morphing and large-amplitude actuation tasks, such as lifting and pushing, in robotic applications.
Conclusions:
- The LCPU/MXene hybrid network represents a significant advancement in soft actuator technology.
- This system holds considerable promise for artificial muscles, aerospace actuators, and other intelligent applications.
- The combination of LCEs with MXene offers a versatile platform for advanced material design.
