期刊
POLYMER
卷 52, 期 2, 页码 540-546出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2010.11.030
关键词
Ionic electroactive polymer actuator; Ionic liquids; Poisson-Nernst-Planck equations
资金
- U.S. Army Research Office under MURI [W911NF-07-1-0452]
- NSF [CMMI 0709333]
- NIH [R01-EY018387-02]
The actuation strain and speed of ionic electroactive polymer (EAP) actuators are mainly determined by the charge transport through the actuators and excess ion storage near the electrodes. We employ a recently developed theory on ion transport and storage to investigate the charge dynamics of short side chain Aquivion (R) (Hyflon (R)) membranes with different uptakes of ionic liquid (IL) 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EMI-Tf). The results reveal the existence of a critical uptake of ionic liquids above which the membrane exhibits a high ionic conductivity (sigma > 5 x 10(-2) mS/cm). Especially, we investigate the charge dynamics under voltages which are in the range for practical device operation (similar to 1 V and higher). The results show that the ionic conductivity, ionic mobility, and mobile ion concentration do not change with the applied voltage below 1 V (and for sigma below 4 V). The results also show that bending actuation of the Aquivion membrane with 40wt% EMI-Tf is much larger than that of Nafion, indicating that the shorter flexible side chains improve the electromechanical coupling between the excess ions and the membrane backbones, while not affecting the actuation speed. (C) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据