报告题目Title：High dielectric constant elastomers for electromechanical applications 高介电弹性体和机电耦合应用
报 告 人Speaker：Frank A. Nüesch（瑞士联邦材料科技实验室 EPMA and EPFL ）
报告时间Time：2016年9月19日(周一)10:00
报告地点Venue：校本部E106会议室（永利量子与分子结构国际中心SHU ICQMS）
报告摘要：
Elastomers that respond to an electric field by changing their size and shape are of great interest for applications such as engines, optical devices, sensors, energy harvesters and artificial muscles, to name a few. Dielectric elastomer actuators (DEAs) are stretchable capacitors made of a thin elastic film sandwiched between two compliant electrodes. Upon application of a large voltage, the film expands laterally due to the electrostatic attraction between oppositely charged electrodes (Maxwell pressure). Widespread application of this simple working principle is still hampered by the large operation voltage of about 1kV required for commercial elastomers. A straight forward approach to reduce the operation voltage is to increase the dielectric constant of the polymer while conserving the mechanical properties and insuring low electrical conductivity. Two approaches towards this goal will be highlighted in this presentation; the first is based on composites with metallic fillers and the second utilizes dipolar functional groups covalently attached to the polymer
