In this paper, two kinds of isotropic giant electrorheological elastomers (GERE) were prepared with urea-coated barium titanyl oxalate nanoparticles as dielectric particles filler, poly (dimethyl siloxane) (PDMS) as an elastic matrix and silicone oil as a plasticizer. Such GEREs are far superior to other isotropic and even anisotropic electrorheological elastomers (EREs), showing excellent electrorheological (ER) performance. The theoretic mechanism in elastomers prepared by us should be explained by saturation surface polarization or orientational polarization model. More interestingly, the storage modulus increment (ΔG′) of GEREs displays curvilinear dependence on the electric field due to poor particle mobility and different mobility under different electric fields, rather than a predicted linear variation. After testing their viscoelastic and dielectric properties and microstructures, we found that too high of the powder content leads to the serious agglomeration of particles and the performance degradation of the elastomer. An incorporation of silicone oil improved the dispersion state and wettability between the particles and matrix. At the same time, silicone oil reduced the hardness of the matrix and made the particles align more easily in the PDMS matrix. Lower initial modulus and higher field-induced modulus make GEREs containing silicone oil have ultrahigh storage modulus sensitivity, in which the best-performing sample achieved a storage modulus change exceeding 400 kPa and attained a maximum relative ER effect of 3280% at 3 kV/mm. Finally, the GERE was used to reversibly control the amplitude of circular motion within seconds by varying electric fields, revealing broad potential application in vibration control.

本文以尿素包覆的草酸钛氧钛酸钡纳米粒子为介电粒子填料，聚二甲基硅氧烷（PDMS）为弹性基体，硅油为增塑剂，制备了两种各向同性的巨电流变弹性体（GER​​E）。此类GERE远远优于其他各向同性甚至各向异性的电流变弹性体（ERE），显示出出色的电流变（ER）性能。我们制备的弹性体的理论机理应通过饱和表面极化或取向极化模型来解释。更有趣的是，由于不良的颗粒迁移率和在不同电场下的不同迁移率，GERE的储能模量增量（ΔG'）显示出对电场的曲线依赖性，而不是预测的线性变化。在测试了它们的粘弹性和介电性能以及微观结构后，我们发现粉末含量过高会导致颗粒严重团聚并导致弹性体的性能下降。硅油的加入改善了颗粒和基质之间的分散状态和润湿性。同时，硅油降低了基体的硬度，并使颗粒更容易在PDMS基体中排列。较低的初始模量和较高的场致模量使含硅油的GERE具有超高的储能模量敏感性，其中性能最佳的样品的储能模量变化超过400 kPa，并且在3 kV / mm时获得的最大相对ER效应为3280％ 。最后，