Folded dielectric elastomer actuators
Folded dielectric elastomer actuators
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DOI：
10.1088/0964-1726/16/2/s15
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发表时间：
2007-04-01
影响因子：
4.1
通讯作者：
De Rossi, Danilo
中科院分区：
文献类型：
--
作者：
Carpi, Federico;Salaris, Claudio;De Rossi, Danilo
目前，多种类型的应用都需要具有收缩能力的聚合物线性执行器。在介电弹性体执行器类别中，目前有两种基本配置可用于此目的：多层堆叠和螺旋结构。第一个由多层机械串联和电气并联堆叠的基本平面执行器组成。第二种配置依赖于与一对螺旋电介质交替的一对螺旋顺应电极。如今，由于每种结构的特殊性，这两种配置的制造都存在一些特定的缺点。因此，更简单的解决方案的可用性可能会促进收缩致动器在实际应用中的短期使用。为此，这里描述了一种新的配置。它由一个由电极片制成的整体结构组成，折叠并压实。由此产生的器件在功能上等同于具有叉指电极的多层堆叠。然而，相对于叠层，新的构造有利地不是不连续的并且可以在一个单相中制造，避免了逐层的多步骤过程。本文介绍了这种由有机硅弹性体制成的新型致动器原型样品的开发和初步测试。
Polymer-based linear actuators with contractile ability are currently demanded for several types of applications. Within the class of dielectric elastomer actuators, two basic configurations are available today for such a purpose: the multi-layer stack and the helical structure. The first consists of several layers of elementary planar actuators stacked in series mechanically and parallel electrically. The second configuration relies on a couple of helical compliant electrodes alternated with a couple of helical dielectrics. The fabrication of both these configurations presents some specific drawbacks today, arising from the peculiarity of each structure. Accordingly, the availability of simpler solutions may boost the short-term use of contractile actuators in practical applications. For this purpose, a new configuration is here described. It consists of a monolithic structure made of an electroded sheet, which is folded up and compacted. The resulting device is functionally equivalent to a multi-layer stack with interdigitated electrodes. However, with respect to a stack the new configuration is advantageously not discontinuous and can be manufactured in one single phase, avoiding layer-by-layer multi-step procedures. The development and preliminary testing of prototype samples of this new actuator made of a silicone elastomer are presented here.