Preparation and characterization of a polyvinylpyrrolidone water-based magnetic fluid / 南方医科大学学报

ABSTRACT

<p><b>OBJECTIVE</b>To prepare a stable water-based magnetic fluid.</p><p><b>METHODS</b>A water-based magnetic fluid was prepared by addition of polyvinylpyrrolidone (PVP) as the coating agent for the magnetic particles. After preparation of Fe3O4 by co-precipitation method, PVP was added for its coating, followed by ultrasonic agitation and purification.</p><p><b>RESULTS</b>The magnetic nanoparticles of homogeneously small size and water-based magnetic fluid were obtained, which had good dispersion in water with strong magnetism.</p><p><b>CONCLUSION</b>PVP can be used as a surfactant to stabilize the magnetic fluid.</p>