| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.342 |
| 발표분야 | 기능성 고분자 |
| 제목 | Ionic Polymer Metal Composite (IPMC) with Increased Bending Force |
| 초록 | IPMC is very effective material which show large bending strain in the presence of low applied voltage. It consists of ion-exchange membrane sandwiched between two novel metal plates.1 The ion-exchange membrane is neutralized with an amount of metal ions, balancing the charge of anions covalently fixed to the membrane. When a small potential is applied to an IPMC in the hydrated state, the mobile metal cations are subjected to diffuse toward the cathode. As a result, the composite undergoes bending deformation toward the anode. IPMC has no moving part and require only a few operating voltage for actuation, and consequently there are many advantages over conventional mechanical actuators. In spite of these advantages, the practical application of IPMC is limited because of low generating force. Nafion films, which used as ion-exchange membrane in IPMC, is too thin to generate sufficient bending force. Some studies have been performed to prepare heavy Nafion film by solution casting.2 In this study, new methods for preparing thick Nafion membrane were proposed. Nafion film sheets were stacked and compressed at a proper temperature. As an another approach to improve bending force, conductive polymer (CP) layers were inserted between Nafion membrane and platinum electrode. The experimental setup was composed of a laser displacement measurement system, a load cell to measure tip force, a potentiometer to induce voltage, and a personal computer system to control instrumentations. With a square wave (3V, 0.5 Hz) applied on the electrode, the displacement was measured at the point 10 mm far from the tip. The bending tip force was measured with the load cell. Bending force was enhanced in both cases of stacked membranes and conductive polymer-inserted IPMCs. For IPMCs with stacked membranes restricted displacement accompanied. For IPMCs with conductive polymer layer, which were actuated with a higher voltage, the increase in bending force was thought to be the result of volume change of conductive polymer layer. Fig.1. Bending displacement of 550, 750 and 900 m IPMC with a square wave of 3V at 0.5 Hz 참고문헌 1. Nemat-Nasser, S. ; Li, Y. J. Appl. Phys. 87, 3321 (2000). 2. Kim, B.; Kim, B. M.; Ryu, J. ; Oh, I. –H. ; Lee, S.-K. ; Cha, S. –E. ; Pak, J. Proc.of SPIE Smart Structures and Materials: Electroactive Polymer Actuators and Devices (EAPAD) 2003, 486. (2003). |
| 저자 | 한만재, 박종혁, 이장열, 왕혁식, 조재영 |
| 소속 | 서울대 |
| 키워드 | IPMC; actuator; artificial muscle; ionic membrane; conductive polymer |
