Synthesis and electrorheological properties of oxalate group-modified amorphous titanium oxide nanoparticles |
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Authors: | Fenghua Liu Gaojie Xu Jinghua Wu Yuchuan Cheng Jianjun Guo Ping Cui |
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Institution: | (1) Ningbo Institute of Material Technology and Engineering (NIMTE), Chinese Academy of Sciences (CAS), Zhuangshi Road 519, Ningbo, 315201, People’s Republic of China |
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Abstract: | 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%. |
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