Nanocomposite magneto-rheological fluids with uniformly dispersed Fe nanoparticles.

摘要: A systematic study of the magnetic and rheological properties magneto-rheological (MR) fluids containing micron-size nano-size iron particles is presented. The MR were prepared with hydraulic oil as carrier liquid lecithin an effective surfactant medium that promotes uniform particle dispersion. Magnetic measurements on micron-, hybrid-(nano + micron), nano-MR clearly indicate partial replacement micro-size by nanoparticles results in a better suspension robust chain formation under applied external fields. For fluids, measured yield stress was found to be lower than micron-MR fluids. However, flow sharper switching make nanoparticle-based appealing for microfluidics device applications where higher not required.