Preparation and electrorheological properties of triethanolamine-modified TiO2

The high molecular dielectric dipole moment of doping material is promising to improve the electrorholegical (ER) effect. It is found that triethanolamine (the molecular dipole moment of triethanolamine is 3.48)-modified TiO2 has good ER properties. Under 5 kV/mm external electric field, the yield stress is 32.6 kPa, which is about 50 times higher than that of pure TiO2 and the leaking electric current density is lower than 16 μA/cm2. The sedimentation rate is about 98% in 20 days.

Graphical abstractTriethanolamine-modified TiO2 ER fluid was synthesized with the sol–gel method. Under an external electric field of 5 kV/mm, the yield stress is 32.6 kPa, which is about 50 times higher than that of pure TiO2. The leaking current density is lower than 16 μA/cm2. Triethanolamine-modified materials are good for preparing good ER fluids.Figure optionsDownload full-size imageDownload as PowerPoint slide