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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

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Liquid Crystalline Elastomers Based on Click Chemistry.

Yuzhan Li¹, Tuan Liu², Veronica Ambrogi³

¹School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.

ACS Applied Materials & Interfaces

|March 23, 2022

Summary

This summary is machine-generated.

Click chemistry offers a robust and energy-efficient method for creating advanced liquid crystalline elastomers (LCEs). This review explores various click reactions for LCE fabrication, focusing on structural control and processing compatibility.

Keywords:

actuation click chemistry liquid crystalline elastomers orientation stimuli-responsive

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Area of Science:

Materials Science
Polymer Chemistry
Organic Chemistry

Background:

Liquid crystalline elastomers (LCEs) combine liquid crystal and elastomeric properties for applications in sensors, actuators, and soft robotics.
Controlling LCE macroscopic orientation and network structure is key to their functionality.
Traditional LCE fabrication methods include hydrosilylation, free radical polymerization, and polyaddition.

Purpose of the Study:

To provide an overview of emerging LCEs synthesized using click chemistry.
To discuss the strengths and limitations of various click reactions for LCE preparation.
To survey the compatibility of these click reactions with processing techniques.

Main Methods:

Overview of click chemistry reactions for LCE synthesis: aza-Michael addition, thiol-ene/yne, thiol-epoxy, copper-catalyzed azide-alkyne cycloaddition, and Diels-Alder cycloaddition.
Analysis of reaction similarities, differences, and suitability for controlled LCE structures and orientations.
Survey of compatibility with surface alignment and additive manufacturing.

Main Results:

Click chemistry provides a versatile and efficient route for LCE fabrication.
Different click reactions offer distinct advantages for controlling LCE structure and orientation.
Compatibility with advanced processing techniques like additive manufacturing is demonstrated.

Conclusions:

Click chemistry is a powerful tool for designing LCEs with tailored properties.
Further research into click chemistry-based LCEs can unlock advanced functionalities and applications.
Optimizing click reactions for specific LCE applications remains an active area of development.