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首页> 外文期刊>RSC Advances >Ultra high permittivity and significantly enhanced electric field induced strain in PEDOT:PSS-RGO@PU intelligent shape-changing electro-active polymers
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Ultra high permittivity and significantly enhanced electric field induced strain in PEDOT:PSS-RGO@PU intelligent shape-changing electro-active polymers

机译：PEDOT：PSS-RGO @ PU智能形变电活性聚合物中的超高介电常数和电场感应应变

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摘要

Large deformation of soft materials is harnessed to provide functions in the nascent field of soft machines. In this work, PEDOT:PSS noncovalent functionalized graphene-polyurethane dielectric elastomer composites (PEDOT:PSS-RGO@PU) have been synthesized as promising candidate materials for micro-actuator electromechanical applications. PEDOT:PSS conducting polymer chains not only reinforce the interaction between the polyurethane matrix and graphene sheets, but also prevent graphene sheets from aggregating and connecting, which are beneficial to forming microcapacitors in the matrix and suppressing the leakage current. The PEDOT:PSS-RGO@PU composite exhibits ultra high permittivity (350 at 1 kHz), low dielectric loss (similar to 0.2 at 1 kHz), low loss modulus (200 MPa), and low loss tangent (similar to 0.4), all being essential to create a high performance electric-induced strain material. The maximum thickness strain of 164% is significantly higher than reported values for polyurethane elastomers and nanocomposites.
机译：利用软材料的大变形，可以在软机器的新生领域发挥作用。在这项工作中，已经合成了PEDOT：PSS非共价官能化的石墨烯-聚氨酯介电弹性体复合材料（PEDOT：PSS-RGO @ PU），作为微致动器机电应用的有前途的候选材料。 PEDOT：PSS导电聚合物链不仅增强了聚氨酯基体与石墨烯片之间的相互作用，而且还防止了石墨烯片的聚集和连接，这有利于在基体中形成微电容器并抑制泄漏电流。 PEDOT：PSS-RGO @ PU复合材料具有超高介电常数（1 kHz时为350），低介电损耗（类似于1 kHz时为0.2），低损耗模量（200 MPa）和低损耗角正切（类似于0.4），所有这些对于创建高性能的电感应应变材料都是必不可少的。 164％的最大厚度应变显着高于聚氨酯弹性体和纳米复合材料的报告值。

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