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首页> 外文期刊>Advanced Materials for Optics and Electronics >High Breakdown Field Dielectric Elastomer Actuators Using Encapsulated Polyaniline as High Dielectric Constant Filler
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High Breakdown Field Dielectric Elastomer Actuators Using Encapsulated Polyaniline as High Dielectric Constant Filler

机译：使用封装的聚苯胺作为高介电常数填料的高击穿场介电弹性体致动器

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摘要

A novel method allowing rapid production of reliable composites with increased dielectric constant and high dielectric strength for dielectric elastomer actuators (DEA) is reported. The promising approach using composites of conductive particles and insulating polymers generally suffers from low breakdown fields when applied to DEA devices. The present publication shows how to overcome this deficiency by using conductive polyaniline (PANI) particles encapsulated into an insulating polymer shell prior to dispersion. PANI particles are encapsulated using miniemulsion polymerization (MP) of divinylbenzene (DVB). The encapsulation process is scaled up to approximately 20 g particles per batch. The resulting particles are used as high dielectric constant (ε') fillers. Composites in a polydimethylsiloxane (PDMS) matrix are prepared and the resulting films characterized by dielectric spectroscopy and tensile tests, and evaluated in electromechanical actuators. The composite films show a more than threefold increase in ε', breakdown field strengths above 50 V μm~(-1), and increased strain at break. These novel materials allow tuning the actuation strain or stress output and have potential as materials for energy harvesting.
机译：报道了一种新颖的方法，该方法可以快速生产具有高介电常数和高介电强度的可靠复合材料，用于介电弹性体致动器（DEA）。当将导电颗粒和绝缘聚合物的复合材料应用于DEA器件时，这种有希望的方法通常会遭受击穿场低的困扰。本出版物显示了如何通过在分散之前使用封装在绝缘聚合物壳中的导电聚苯胺（PANI）颗粒来克服这一缺陷。使用二乙烯基苯（DVB）的细乳液聚合（MP）封装PANI颗粒。封装过程的规模最大为每批约20 g颗粒。所得颗粒用作高介电常数（ε'）填料。制备聚二甲基硅氧烷（PDMS）基质中的复合材料，并通过介电谱和拉伸测试对所得薄膜进行表征，并在机电执行器中进行评估。复合膜的ε'增加超过三倍，击穿场强超过50 Vμm〜（-1），断裂应变增加。这些新颖的材料可以调节致动应变或应力输出，并有潜力用作能量收集的材料。

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  • 来源
    《Advanced Materials for Optics and Electronics》 |2010年第19期|p.3280-3291|共12页
  • 作者

    Martin Molberg; Daniel Crespy; Patrick Rupper; Frank Nueesch; Jan-Anders E. Manson; Christiane Loewe; Dorina M. Opris;

  • 作者单位

    Empa, Swiss Federal Institute for Materials Testing and Research Functional Polymers Laboratory Ueberlandstrasse129, CH-8600, Duebendorf (Switzerland) Laboratoire de Technologie des Composites et Polymeres (LTC) Ecole Polytechnique Federale de Lausanne (EPFL) 1015 Lausanne (Switzerland);

    rnEmpa, Swiss Federal Institute for Materials Testing and Research Laboratory for Protection and Physiology Lerchenfeldstr. 5, CH-9014, St. Gallen (Switzerland) Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany;

    rnEmpa, Swiss Federal Institute for Materials Testing and Research Advanced Fibers Laboratory Lerchenfeldstr. 5, CH-9014, St. Gallen (Switzerland);

    rnEmpa, Swiss Federal Institute for Materials Testing and Research Functional Polymers Laboratory Ueberlandstrasse129, CH-8600, Duebendorf (Switzerland);

    rnLaboratoire de Technologie des Composites et Polymeres (LTC) Ecole Polytechnique Federale de Lausanne (EPFL) 1015 Lausanne (Switzerland);

    rnEmpa, Swiss Federal Institute for Materials Testing and Research Functional Polymers Laboratory Ueberlandstrasse129, CH-8600, Duebendorf (Switzerland);

    rnEmpa, Swiss Federal Institute for Materials Testing and Research Functional Polymers Laboratory Ueberlandstrasse129, CH-8600, Duebendorf (Switzerland);

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