| 초록 |
In nature, twisting motions of many organisms enable complex mechanical functions such as swimming, crawling, climbing and energy storage. Liquid crystal elastomers (LCEs) are anisotropic polymeric materials which are promising candidates for the soft-actuator owing to their capability of stimuli-responsive properties. LCEs have attracted significant attention due to their possibility of designing the structure of the polymer network by templating using the nematic director field. In this work, we report the highly reversible and fast three-dimensional torsional actuation of LCE droplets using heat. LCE droplet was obtained by simply mixing non-polymerizable mesogen and polymerizable mesogen. We further found that the anisotropic properties could be controlled by the chemical composition of LCE droplet, the ratio of non-polymerizable and polymerizable mesogen. The simple and versatile method of twisting actuation of LCE droplet gives us fundamental of shape control of LCE and design self-swimming particle and drug delivery system. This work was supported by the POSCO Science Fellowship of POSCO TJ Park Foundation and the Korea National Research Foundation (2021R1A4A1030944). |
