Abstrait

Effect of dilution on the water based starch coated magnetic fluid

B.Samuel Ebinezer, L.Palaniappan

Ultrasonic study of the water based starch coated magnetite nano particles have been made with and without the external magnetic field at 303 K. The observations were recorded for six different volume concentrations of the same fluid under different magnetic field strength. The results show that the interactions between the solvent and the coated solute particles depend on the extent of applied field. The extent of external field increases the agglomeration and forms a chain structure that plays an important role in the determination of strength of grain-field interaction. Comparative study of the variation in acoustical properties suggests that the effect of dilution is to reduce the chain structure formation thereby weakens the effective interaction between the external field and the magnetic particles.