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首页> 外文期刊>Composites: mechanics, computations, applications >ELECTRORHEOLOGICAL SUSPENSION WITH A NANOSIZED POLYMERIC DISPERSED PHASE SIGNIFICANCE AND ROLE OF DOUBLE DIELECTRIC LAYER
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ELECTRORHEOLOGICAL SUSPENSION WITH A NANOSIZED POLYMERIC DISPERSED PHASE SIGNIFICANCE AND ROLE OF DOUBLE DIELECTRIC LAYER

机译：具有纳米化分散相意义和双重介电层作用的电流变悬浮

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The electrorheological properties of a new generation of smart materials, namely, electrorheological suspensions (ERS) based on nanosized polymeric particles of polyimides in the medium of methyl silicone, are discussed. The optimal structures of polyimides with a high electrorheological response were predicted within the framework of quantum-mechanical investigations on the previous stages of the authors' research (Yanovsky et al., 2011) and synthesized at the Institute of Applied Mechanics of the Russian Academy of Sciences. For the obtained polyimide particles with a different chemical structure, the electrophysical properties (sizes of particles and of their aggregates, size distribution, specific surface, double electric layer potential, electrorheological response on shear in electric fields of different intensities) were investigated. The chemical composition of polyimides with optimal electrorheological characteristics has been established. Based on these specimens, electrorheological suspensions with different concentrations of the dispersed phase have been obtained. For the first time, the curves of flow, dynamic Theological characteristics, namely, the moduli of elasticity and losses, loss-angle tangent of similar electrorheological suspensions based on nanosized particles of polyimides were described in a wide range of Theological parameters: the rates of shearing, frequencies of periodic sinusoidal small-amplitude deformation, and temperatures at different concentrations of dispersed phase. The presence of a high-power electrorheological effect in these materials as compared to the electrorheological suspensions based on microsized particles, as well as a slight dependence of the electrorheological characteristics on temperature up to 80℃ were noted. The results obtained open up prospects for a wide practical application of this type of materials.
机译：讨论了新一代智能材料的电流变特性，即基于甲基硅酮介质中聚酰亚胺纳米级聚合物颗粒的电流变悬浮液（ERS）。在作者研究的前期阶段（Yanovsky et al。，2011），在量子力学研究的框架内预测了具有高电流变响应的聚酰亚胺的最佳结构，并在俄罗斯科学院应用力学研究所合成。科学。对于获得的具有不同化学结构的聚酰亚胺颗粒，研究了其电物理性质（颗粒及其聚集体的尺寸，尺寸分布，比表面积，双电层电势，不同强度电场在剪切力下的电流变响应）。已经建立了具有最佳电流变特性的聚酰亚胺的化学组成。基于这些样品，获得了具有不同浓度的分散相的电流变悬浮液。首次在多种流变学参数中描述了基于纳米级聚酰亚胺颗粒的类似电流变悬浮液的流动曲线，动态神学特性（即弹性模量和损耗模量，损耗角正切）的曲线：剪切，周期性正弦小振幅变形的频率以及不同分散相浓度下的温度。与基于微细颗粒的电流变悬浮液相比，这些材料具有高功率的电流变效应，并且电流变特性对温度高达80℃的依赖性很小。结果为这种材料的广泛实际应用开辟了前景。

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