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首页> 外文期刊>Polymers for advanced technologies >Microstructure and viscoelasticity of electrorheological suspensions with hybrid core‐shell microspheres
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Microstructure and viscoelasticity of electrorheological suspensions with hybrid core‐shell microspheres

机译：杂交核心壳微球的电流悬浮液的微观结构和粘弹性

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> A novel type of electrorheological (ER) fluids with hybrid microspheres as dispersed phases was prepared and their rheological properties in dynamic and oscillatory modes in the presence of electric field were studied. Hybrid microspheres are new types of inorganic‐organic composites consisting of inorganic hollow cores covered with a thin layer of conjugated polymer poly (3‐octylthiophene)—P 3 OT, followed by a polyurethane electrolyte shell of defined thicknesses and controlled (electronic and ionic) conductivities. It has been found that the rate of ER response for the applied electric field of the order of few kV/mm, as well as the recovery time after high shear loads of the novel ER fluids, was significantly improved in comparison to the typical solid electrolyte‐based materials. It has been shown that upon the application of an electric field the suspensions of hybrid microspheres form a gel‐like network structure at low strain region with reasonable rigidity characterized by the domination of G′ moduli over G″ and broad linear viscoelastic range. It was shown that at electric fields as high as 3?kV/mm, the investigated ER materials exhibited predominantly elastic behavior and were able to endure strains up to 3% without significant deformation of the material microstructure. Moreover, the novel ER materials exhibited much faster microstructure recovery after high shear loads in comparison to ER fluids comprising core‐shell composites without poly (3‐octylthiophene) interlayer, which makes them more suitable for the applications requiring immediate response to an external electric field.
机译： > 制备了一种具有杂交微球的新型电风学（ER）流体作为分散阶段，研究了在电场存在下动态和振荡模式中的流变性质。混合微球是新型无机 - 有机复合材料，其由覆盖有薄层的共轭聚合物聚（3-辛基噻吩）-P薄层的无机空心芯组成 3 OT，其次是聚氨酯电解质壳，其定义的厚度和控制（电子和离子）电导率。已经发现，与典型的固体电解质相比，施加电场的施加电场的施加电场的响应速率以及新的ER流体的高剪切载荷后的恢复时间。基于材料。已经表明，在施加电场时，混合微球的悬浮液在低应变区形成凝胶样网络结构，其具有合理的刚度，其特征在于G'模态的占地面积和宽线性粘弹性范围。结果表明，在高达3？kV / mm的电场，所研究的ER材料主要表现出占主弹性的行为，并且能够忍受高达3％的菌株，而不会显着变形材料微观结构。此外，与没有聚（3-辛基噻吩）中间层的核 - 壳复合材料的ER流体相比，新的ER材料在高剪切载荷之后表现出更快速的微观结构回收率，这使得它们更适合于需要立即响应外部电场的应用。

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