Titanate nano-whisker electrorheological fluid with high suspended stability and ER activity

被引:82
作者
Yin, JB [1 ]
Zhao, XP [1 ]
机构
[1] Northwestern Polytech Univ, Inst Electrorheol Technol, Dept Appl Phys, Xian 710072, Peoples R China
关键词
D O I
10.1088/0957-4484/17/1/031
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
We prepared a new electrorheological (ER) fluid using titanate nano-whiskers as the dispersal phase. The titanate nano-whiskers, which were easy to synthesize by a simple hydrothermal treatment of TiO2 nano-particles in alkaline solution, possessed a low apparent density of about 1.85 g cm(-3), large length-diameter ratio, and layered tube-like structure bonded loosely with ions by electrostatics. The ER fluid was prepared by dispersion of nano-whiskers in silicone oil with the ultrasonic technique. It was found that the suspended stability of this nano-whisker ER fluid was much better than that of the nano-particle ER fluid when no additive was added to the fluid. No significant sedimentation was found in this nano-whisker ER fluid after several months, due to the supporting effect of the nano-whiskers with large length-diameter ratio, while sedimentation occurred in TiO2 nano-particle ER fluid due to aggregation of nano-particles. Under electric field, this nano-whisker ER fluid showed notable ER activity with dynamic yield stress of about 1.1 kPa at 3 kV mm(-1) and 10% particle volume fraction, which outclassed the yield stress (80 Pa) of ER fluid made of the raw material of TiO2 nano-particles.
引用
收藏
页码:192 / 196
页数:5
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