中文摘要：

以草酸氧钛纳米颗粒为分散相，以不同黏度的二甲基硅油（运动学黏度为10cSt、50cSt、100cSt、500cSt和1000cSt）为基液制备电流变液，测试其剪切屈服强度、零场黏度、电流变效率、响应时间及沉降稳定性，研究了基液黏度对草酸氧钛电流变液性能的影响。结果表明，以50cSt二甲基硅油为基液的电流变液具有最佳的电流变效率，以100cSt二甲基硅油为基液的电流变液具有最短的响应时间和较高的沉降稳定性。其机制是，较高的基液黏度可提供较大的黏滞阻力，但易引起颗粒的团聚。

英文摘要：

Electrorheological （ER） fluids were fabricated by dispersing oxalate group-modified amorphous titanium oxide nanoparticles in dimethyl silicone oil with different kinematic viscosities （10 cSt, 50 cSt, 100 cSt, 500 cSt and 1000 cSt）. The yield stress, zero-field viscosity, ER efficiency, response time, and sedimentation stability were tested to find the influence of the viscosity of silicone oil on the properties of ER fluids. The results indicate that the ER fluids based on the silicone oil with kinematic viscosity of 50 cSt present the optimal ER efficiency, and the fluids based on the silicone oil with kinematic viscosity of 100 cSt show the shortest response time and good sedimentation stability. The mechanism is that the silicone oil with larger viscosity provides larger viscous force, but makes the nanoparticles easier to agglomerate.