磁流变弹性体的制备及其压敏导电性能研究∗

摘要

A magnetorheological elastomer conductive element and its basic preparation process were designed based on its electric conductivity.Further we designed the test device for the entire electrical conductivity device based on reliability of the conductive element.Under the same conditions,the samples with different ratio of single particle diameter were prepared.Experimental results showed that the stability test of the electric conduc-tivity can be achieved by using this device and the current and the resistivity of MREs are tested.Due to the vis-coelasticity of the matrix material,the compressive stress decreases with time and the smaller particle size is less affected by the viscosity of the mixture.The conductance of MREs is affected more obviously by the vis-coelasticity.%针对磁流变弹性体的导电特性，设计了一种磁流变弹性体导电性测试元件，确立了其基本的制备工艺。基于磁流变弹性体导电性元件的可靠性，在相同条件下制备不同配比单一粒径磁流变弹性体样品，进一步设计整个导电性元件的压敏特性测试装置，并利用该装置对磁流变弹性体样品的电流与电阻率进行测试，结果表明，该元件可以实现磁流变弹性体压敏导电特性的稳定性测试，通过测试数据分析得到磁流变弹性体由于基体材料的粘弹性压应力随时间衰减，较小的颗粒体积比对混合液的黏度影响较小，对磁流变弹性体样品的电导影响更加敏感。