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Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
Published on: January 19, 2016
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Phase patterning of liquid crystal elastomers by laser-induced dynamic crosslinking.
Seok Hwan Choi1, Ju Hee Kim2, Jiyong Ahn1
1Department of Mechanical Engineering, Seoul National University, Seoul, Republic of Korea.
Nature Materials
|March 27, 2024
Summary
Researchers developed laser-induced dynamic crosslinking for adaptive liquid crystal elastomers. This method enables precise, reconfigurable patterns and functions like temporary information encryption for wearable devices.
Area of Science:
- Materials Science
- Polymer Chemistry
- Optoelectronics
Background:
- Liquid crystal elastomers (LCEs) exhibit reversible mechanical and optical property transitions.
- Current limitations include lack of local phase patterning and irreversible phase programming.
- These limitations hinder the broad implementation of LCEs.
Purpose of the Study:
- To introduce a novel technique for high-resolution patterning and phase control in LCEs.
- To enable adaptive LCEs with reconfigurable phases and complex patterns.
- To expand the functionality of LCEs for applications like information encryption.
Main Methods:
- Laser-induced dynamic crosslinking utilizing allyl sulfide groups.
- High-resolution multilevel patterning and transmittance modulation.
- Generation of thermo- and strain-responsive patterns within a single LCE film.
Main Results:
- Achieved precise, multilevel patterning and transmittance modulation in LCEs.
- Demonstrated reconfigurable adaptive LCEs with desired phases and complex patterns.
- Successfully implemented temporary information encryption at body temperature.
Conclusions:
- Laser-induced dynamic crosslinking overcomes limitations in LCE patterning and programming.
- Adaptive LCEs offer enhanced functionality for advanced applications.
- This technique expands LCE utility in wearable technology and information storage.
