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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Electrorheological behavior of suspensions of camphorsulfonic acid (CSA) doped polyaniline nanofibers in silicone oil
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Electrorheological behavior of suspensions of camphorsulfonic acid (CSA) doped polyaniline nanofibers in silicone oil

机译：硅油悬浮酸（CSA）掺杂聚苯胺纳米纤维悬浮液的电流性能

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摘要

The electrorheological (ER) effect is known as the enhancement of the apparent viscosity upon application of an external electric field applied perpendicular to the flow direction. Suspensions of polarizable particles in non-conducting solvents are the most studied ER fluids. The increase in viscosity observed in the suspensions is due to the formation of columns that align with the electric field. This work presents the ER behavior of suspensions, in silicone oil, of camphorsulfonic acid (CSA) doped polyaniline (PANI) nanofibers. The ER properties of the suspensions were investigated with a rotational rheometer, to which an ER cell was coupled, in steady shear, and electrical field strengths up to 2 kV mm(-1). The effects of the electric field strength, content of nanostructures and viscosity of the continuum phase, in the shear viscosity and yield stress, were investigated at room temperature. As expected, the ER effect increases with the increase of the electric field as well as with the increase of content of nanofibers and it decreases with the increase of the oil viscosity. The suspensions present giant ER effects (higher than 2 orders of magnitude increase in viscosity for low shear rates and high electric fields), showing their potential application as ER smart materials.
机译：电气学（ER）效应被称为在施加垂直于流动方向的外部电场时提高表观粘度。在非导电溶剂中的可极化颗粒的悬浮液是最熟练的ER流体。在悬浮液中观察到的粘度的增加是由于形成与电场对齐的柱子。这项工作介绍了悬浮液，硅油，樟脑油（CSA）掺杂的聚苯胺（PANI）纳米纤维的ER行为。用旋转流变仪研究悬浮液的ER性质，旋转流变仪耦合，稳定剪切和电场强度高达2kV mm（-1）的电场强度。在室温下研究了电场强度，纳米结构的含量和连续阶段的粘度的影响，在室温下研究了剪切粘度和屈服应力。正如预期的那样，ER效应随着电场的增加以及纳米纤维含量的增加而增加，并且随着油粘度的增加而降低。悬浮液呈现巨型ER效应（高于剪切速率和高电场的粘度增加2次数量级），显示它们作为ER智能材料的潜在应用。

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