Polar molecule dominated electrorheological effect

被引：86

作者：

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China ^{[1
]}

不详 ^{[2
]}

不详 ^{[3
]}

机构：

[1] Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences

[2] Department of Physics, Hong Kong University of Science and Technology, Hong Kong

[3] Institute of Theoretical Physics, Chinese Academy of Sciences

来源：

Chin. Phys. | 2006年 / 11卷 / 2476-2480期

关键词：

Electrorheological fluid; Polar molecule; Polarization; Shear stress;

D O I：

10.1088/1009-1963/15/11/002

中图分类号：

学科分类号：

摘要：

The yield stress of our newly developed electrorheological (ER) fluids consisting of dielectric nano-particles suspended in silicone oil reaches hundreds of kPa, which is orders of magnitude higher than that of conventional ones. We found that the polar molecules adsorbed on the particles play a decisive role in such new ER fluids. To explain this polar molecule dominated ER (PM-ER) effect a model is proposed based on the interaction of polar molecule-charge between the particles, where the local electric field is significantly enhanced and results in the polar molecules aligning in the direction of the electric field. The model can well explain the giant ER effect and a near-linear dependence of the yield stress on the electric field. The main effective factors for achieving high-performance PM-ER fluids are discussed. The PM-ER fluids with the yield stress higher than one MPa can be expected. © 2006 Chin. Phys. Soc. and IOP Publishing Ltd.

引用

页码：2476 / 2480

页数：4

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