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首页> 外文期刊>Journal of Polymer Science, Part B. Polymer Physics >Electroactuation of solvated triblock copolymer dielectric elastomers: Decoupling the roles of mechanical prestrain and specimen thickness
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Electroactuation of solvated triblock copolymer dielectric elastomers: Decoupling the roles of mechanical prestrain and specimen thickness

机译：溶剂化三嵌段共聚物介电弹性体的电致动：机械预应变和样品厚度的作用分离

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摘要

Dielectric elastomers (DEs) constitute a class of electroactive polymers that are becoming increasingly important as lightweight and mechanically robust replacements for conventional transducers and actuators. Because of their inherent cycling resilience, they also show tremendous promise as energy-harvesting media, as well as smart sensors and microfluidic devices. Recent studies have demonstrated that DEs composed of midblock-solvated triblock copolymers exhibit attractive electromechanical attributes such as giant electroactuation strains at relatively low electric fields at high conversion efficiency. Moreover, the properties of these readily processable systems are highly composition-tunable, thereby making them ideal candidates for a detailed study of the coupling between initial specimen thickness and mechanical prestrain, which is frequently used to reduce specimen thickness before actuation to lower the voltage required to achieve electroactuation. Conventional wisdom based on the notion of an ideal DE indicates that electroactuation should only depend on pre-actuation specimen thickness, but we report results that unequivocally indicate a more detailed material/process description is required.
机译：介电弹性体（DEs）构成了一类电活性聚合物，作为常规换能器和执行器的轻巧和机械坚固的替代品，其重要性日益提高。由于其固有的循环弹性，它们还显示出巨大的前景，可作为能量收集介质以及智能传感器和微流体设备。最近的研究表明，由中嵌段溶剂化的三嵌段共聚物组成的DE表现出诱人的机电属性，例如在相对较低的电场下以高转换效率具有巨大的电致动应变。此外，这些易于加工的系统的特性具有很高的成分可调性，因此使其成为详细研究初始样品厚度和机械预应变之间耦合的理想选择，该力学常用于在驱动之前减小样品厚度以降低所需电压实现电驱动。基于理想DE概念的传统观点表明，电驱动应仅取决于预驱动试样的厚度，但我们报告的结果明确表明需要更详细的材料/过程描述。

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