| 초록 |
To examine the influence of particle geometry on electrorheological (ER) properties, graphene oxide (GO)-wrapped silica materials with various aspect ratio are fabricated by a facile and simple method. As the aspect ratio of the GO-wrapped silica material increases, the ER fluid exhibits a high shear stress due to the high flow resistance and mechanical stability of the fluid. Furthermore, the GO-wrapped silica material with a higher aspect ratio shows a higher dielectric constant and shorter relaxation times for interfacial polarization, which is associated with the enhancement of ER performance. Consequently, it is confirmed that the aspect ratio of GO-wrapped silica materials plays a key role in the improvement of ER activity. |
