Synthesis of body temperature-triggerable dynamic liquid crystal elastomers using Diels-Alder crosslinkers

Area of Science:

• Materials Science
• Polymer Chemistry
• Biomedical Engineering

Background:

• Liquid crystal elastomers (LCEs) are advanced materials with unique properties.
• Dynamic covalent bonds offer self-healing and reconfigurable characteristics.
• Biomedical actuators require precise and reversible deformation.

Purpose of the Study:

• To develop novel LCEs utilizing solely Diels-Alder dynamic covalent bonds (DADCBs).
• To investigate the body temperature sensitivity of these DADCBs-based LCEs.
• To demonstrate the potential of these LCEs in creating soft actuators for biomedical applications.

Main Methods:

• Synthesis of LCEs with DADCBs as the sole crosslinking mechanism.
• Characterization of material properties, including thermal response and mechanical behavior.
• Fabrication and testing of soft actuators demonstrating reversible deformation.

Main Results:

• Successfully developed LCEs with DADCBs exhibiting body temperature sensitivity.
• Demonstrated reversible deformation of soft actuators upon temperature changes between ambient and body temperature.
• Highlighted the recyclability, reprogrammability, and reconfigurability of the developed LCEs.

Conclusions:

• The developed DADCBs-based LCEs offer a promising platform for advanced soft actuators.
• The body temperature sensitivity and dynamic nature of the crosslinks are key for reversible actuation.
• These materials hold significant potential for innovative biomedical applications requiring responsive soft robotics.