| 초록 |
Electroactive actuators based on ionic liquids (ILs)-containing polymers have been extensively studied for biomimetic devices as artificial muscles and soft robotics. In this study, we are motivated to unveil the key factors affecting electromechanical properties of ionic polymer actuators by employing a set of sulfonated di-/triblock copolymers and imidazolium ILs. It has been revealed that the type of anions in ILs impacts the actuation performance. Furthermore, the bending strain and durability were found to be tunable in a straightforward manner by controlling the block architecture and molecular weight of the polymer. By optimizing the type of IL/block architecture, we were able to achieve a 10 times increase in the bending strain, in comparison to the PVdF-actuators. We carried out in-depth studies on the molecular-level understanding of actuation mechanisms underlying the improved performance, characterized by in situ spectroscopy/scattering experiments under applied voltages. |
