Abstract Dielectric elastomers (DEs) are able to deform significantly in response under an external electric field. DE actuators have promising applications in many emerging fields such as biomimetic robots, haptic devices, tunable lens, and loudspeakers. Practical applications of DE devices are limited by the extremely high electric field and the high pre-stretch. Herein, we have designed and fabricated a new type of soft DE composites of partially reduced graphene oxide (RGO)/polystyrene-b-poly (n-butyl acrylate)-b-polystyrene triblock copolymer (SBAS). An extremely soft SBAS was tailor-made as the elastic matrix. A facile colloidal blending method, i.e. simply mixing the SBAS latex with GO aqueous dispersion, was used to fabricate the nano-structured composite with a segregated network of RGO nano-sheets. The design strategy led to the DE composite film of 1.5 wt% RGO/SBAS owning low modulus (0.51 MPa), high relative permittivity (∼11) and relatively high dielectric breakdown strength (33 kV/mm). The DE composite film exhibited 21.3% maximum area actuation strain at relatively low electric field strength 33 kV/mm without pre-stretch.

中文翻译：

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一种新型低模量介电弹性体纳米结构复合材料，具有高介电常数，表现出由低电场引起的大驱动应变

摘要 介电弹性体 (DEs) 在外部电场作用下能够显着变形。DE 执行器在许多新兴领域具有广阔的应用前景，例如仿生机器人、触觉设备、可调镜头和扬声器。DE 器件的实际应用受到极高电场和高预拉伸的限制。在此，我们设计并制造了一种新型的部分还原氧化石墨烯（RGO）/聚苯乙烯-b-聚（丙烯酸正丁酯）-b-聚苯乙烯三嵌段共聚物（SBAS）的软DE复合材料。一种极其柔软的 SBAS 是量身定制的弹性基质。一种简便的胶体混合方法，即简单地将 SBAS 胶乳与 GO 水分散体混合，用于制造具有分离网络的 RGO 纳米片的纳米结构复合材料。该设计策略导致 1.5 wt% RGO/SBAS 的 DE 复合膜具有低模量 (0.51 MPa)、高相对介电常数 (~11) 和相对高的介电击穿强度 (33 kV/mm)。DE复合膜在没有预拉伸的情况下在相对较低的电场强度33 kV / mm下表现出21.3％的最大面积致动应变。