Patents

A water based double surfacted ferrofluid having magnetite nanoparticles (2 - 18 nm) coated with primary and secondary surfactants is synthesized. On the otherhand, an aqueous dispersion of functionalized MWCNT (diameter = 14 - 18 µm, length = 1.6 - 2.5 µm) is prepared by acid treatment. A hybrid solutions in different v/v ratios yielded stable dispersions having both nanoparticles and nanotubes in itself behave as one system. The synthesized hybrid fluid show magnetic response and self-sustained homogeneity of in presence of magnetic field. In addition, the hybrid fluids exhibits a long term sedimentation and magnetic stability which enables one to use them for various applications like MRI, EMI shieling, energy conversion etc.