Synthesis and electrorheological properties of oxalate group-modified amorphous titanium oxide nanoparticles
Synthesis and electrorheological properties of oxalate group-modified amorphous titanium oxide nanoparticles
复制标题
草酸基团修饰的非晶态氧化钛纳米颗粒的合成及电流变性能
DOI：
10.1007/s00396-010-2291-x
复制
发表时间：
2010-12-01
影响因子：
2.4
通讯作者：
Cui, Ping
中科院分区：
文献类型：
--
作者：
Liu, Fenghua;Xu, Gaojie;Cui, Ping
采用改进的水解方法制备了一种草酸基团修饰的二氧化钛纳米粒子。研究了微观结构、介电性能和电流变（ER）性能。结果表明，草酸根基团能够有效提高颗粒的介电性能和表面极化率，且改性二氧化钛基电流变液的电流变性能远高于纯二氧化钛基电流变液。合适的体积分数为30%的草酸基改性非晶态氧化钛基电流变液在E= 5kV/mm时剪切应力达到47.5kPa，电流密度小于18μAcm−2。当体积分数为 40% 时，屈服应力可高达 114 kPa atE= 5 kV/mm。
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 atE= 5 kV/mm, and the current density is less than 18 μAcm−2. The yield stress can be up to 114 kPa atE= 5 kV/mm with a volume fraction of 40%.