Fast Low Voltage Electroactive Actuators Using Nanostructured Polymer Electrolytes
- Onnuri Kim, Tae Joo Shin, Moon Jeong Park*

We have developed a new electroactive actuator composed of self-assembled sulfonated block copolymers and ionic liquids. The new actuator demonstrated improvements in actuation properties over other polymer actuators reported earlier, large generated strain without any signs of back relaxation. In particular, the millimeter-scale displacements obtained for the actuators, with rapid response at sub-1V conditions over 13500 cycles in air, have not been previously reported in the literature. The key to success stemmed from the evolution of the unique nanostructure of the polymer layer with domain size gradients beneath the cathode during actuation, which promoted the bending motion of the actuators.

이온성 액체를 고분자 전해질에 탐침시켜 나노 구조를 가진 전기감응성 고분자 액츄에이터를 개발하였다. 새로운 액츄에이터는 낮은 구동 전압, 뛰어난 안정성, 빠른 반응 속도, 큰 변형율, back relaxation의 부재 등 여러 장점을 가지며, 기존의 이온성 고분자 액츄에이터들에 비해 월등히 뛰어난 성능을 보였고, 소형 배터리, 마이크로 센서 등 생체 모방형 디바이스로의 적용 가능성에 대해 새로운 가능성을 제시하였다.