화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.19, No.10, 1014-1021, October, 2011
DOI10.1007/s13233-011-1003-9  Export Citation
Performance Enhancement of Ionic Polymer-Metal Composite Actuators Based on Radiation-Grafted Poly(ethylene-co-tetrafluoroethylene)
Jang Yeol Lee, Hyuck Sik Wang, Man Jae Han, Gook-Chan Cha1, Sung Hee Jung1, Sukmin Lee1, and Jae Young Jho†
  • Department of Chemical and Biological Engineering, Seoul National University, Seoul, 151-744, Korea
  • 1Korea Orthopedics & Rehabilitation Engineering Center, Incheon, 403-120, Korea
E-mail:
To develop a high-performance ionic polymer-metal composite (IPMC) actuator, a series of poly(styrene sulfonate)-grafted poly(ethylene-co-tetrafluoroethylene) (ETS) membranes with ion exchange capacity (IEC) ranging from 2.16 to 3.01 meq/g was synthesized by γ-radiation grafting. The degree of grafting and the IEC of the ETS were regulated by adjusting the grafting conditions, such as the total irradiation dose and polymerization time. The bending displacement and generating force of the actuators assembled with the ETS membranes increased monotonically in proportion to the IEC. All the prepared actuators exhibited much larger displacement and a faster response than those of the Nafion-based actuators without straightening-back. The excellent performance of the actuators was attributed to the inherent high IEC of the ETS and the consequent high number of available mobile cations and free water molecules in the ETS, leading to large volume expansion on the cathode side. Improved morphological and electrical properties of the platinum layer on the ETS as well as the high bending flexibility of the actuators also contributed to the increase in actuation performance.
Keywords:actuators;ion exchange capacity;ion exchange membrane;ionic polymer-metal composites;radiation grafting.
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