| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.38 |
| 발표분야 | 기능성 고분자 |
| 제목 | Effective Electroactive Polymer Actuators As New Ionic Polymer-Metal Composites (IPMCs) With Increased Air-operating stability |
| 초록 | Recently, there have been considerable attentions for biomimetic sensors and actuators such as artificial muscles. As the electroactive polymer actuator, ionic polymer-metal composites(IPMC) is one of the most promising smart materials because of its large bending behaviors with low applied voltage. The bending deformation is attributed to “water drag” associated with the unidirectional migration of counter cations in the ion-exchange membrane. But it also require some humidity to function because water will easily evaporate in dry condition and water electrolysis will be induced around 1V. For practical applications, it is surely necessary to be overcome these definite limitations. In this study, new IPMC actuators were prepared by using various immersing solvents. They are composed of fluorinated ionic polymers on witch is chemically deposited with a noble metal such as platinum. New ionic polymers such as EW controlled-P(VDF-co-HPF)-g-PSSA (Equivalent weight = 0.12 ~ 2.7 meq/g ) were synthesized by radiation grafted techniques and sulfonation processes. And various solvents (nonaqueous solvents and ionic liquids) as a substitute for water were immersed into fluorinated ionic polymers by effective imbibing processes. They were characterized by impedance measurement, cyclic voltammetry, FT-SEM, EDS, FE-Raman, DSC and laser displacement meter. The effectiveness of new solvents were examined by various actuation tests. Bending actuation capabilities of prepared IPMCs are similar to these of Nafion IPMC with waters. Air-operating life time of new effective actuators is considerably increased with constant bending properties. Experimental results indicated that the effective actuation properties of prepared IPMCs are affected by ionic conductivities of EW-controlled membrane, freezable solvent contents and surface morphology of metal electrode etc. And the air-operating stabilities and air-evaporative resistivities of prepared IPMCs with effective actuations are appreciably dependent upon various properties of immersing solvents in EW-controlled membrane. Fig. Effective Bending Actuation of new IPMC with proper immersing solvents |
| 저자 | 이장열, 한만재, 왕혁식, 김민정, 조재영 |
| 소속 | 서울대 |
| 키워드 | electroactive polymer actuator; IPMC |
