Synthesis and electrorheological properties of oxalate group-modified amorphous titanium oxide nanoparticles

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• 作者：Fenghua Liu ; Gaojie Xu ; Jinghua Wu ; Yuchuan Cheng ; Jianjun Guo and Ping Cui
• 关键词：Electrorheological fluid ; Dielectric property ; Titanium oxide ; Oxalate group ; Shear stress
• 刊名：Colloid & Polymer Science
• 出版年：2010
• 出版时间：December 2010
• 年：2010
• 卷：288
• 期：18
• 页码：1739-1744
• 全文大小：221.2 KB

文摘

A kind of titanium oxide nanoparticles modified with varying amounts of oxalate group was prepared using a modified hydrolysis method. The microstructure, dielectric properties, and electrorheological (ER) performance were investigated. The results indicate that the oxalate group can effectively improve the dielectric properties and surface polarizability of the particles, and the ER performance of modified titanium oxide-based ER fluid is much higher than that of pure titanium oxide-based ER fluid. The shear stress of suitable oxalate group-modified amorphous titanium oxide-based ER fluid with a volume fraction of 30 % reaches 47.5 kPa at E = 5 kV/mm, and the current density is less than 18 μAcm−2. The yield stress can be up to 114 kPa at E = 5 kV/mm with a volume fraction of 40 % .