| 초록 |
Liquid crystal elastomers (LCEs) have been regarded as promising candidates for fabricating artificial muscles due to a large reversible actuation via conformational change across LC phase transition. The incorporation of dynamic covalent bonds within LCEs can bring additional benefits including reprocessability, shape reprogrammability and self-healing which are not allowed in the conventional LCEs. In this study, we synthesized a new class of reprocessable, reprogrammable and self-healable LCEs incorporating exchangeable thiourea bonds. By exploiting the dynamic nature of thiourea bonds built-in the LCE, we demonstrate that the reprocessability of the LCE by compression molding and solution reprocessing at elevated temperature. As a proof of concept, electrically-powered artificial muscles were successfully fabricated by thermal welding and Joule-heat induced programming. |
