Preparation of magnetic polymer particles with nanoparticles of Fe(0)

Nanoparticles of Fe (0) were encapsulated with different amount of PMMA. The magnetization properties were a function of final average diameter of composite particle. [Display omitted] ► The magnetic polymers exhibit a fast and very strong response to external magnetic fields. ► Particles of Fe(0) were encapsulated with different quantity of polymethyl methacrylate. ► The magnetization values of the Fe(0) nanoparticles naked and encapsulated were largest than those reported for magnetite. Iron nanoparticles (Fe(0)), were encapsulated into polymethyl methacrylate (PMMA), by means of emulsion polymerization techniques in a semicontinuous process. The final average diameter of the composite particle was calculated until three times of average particle of iron particles and were stabilized with a non-ionic surfactant. They were then characterized by scanning electron microscopy and dynamic light scattering. Their magnetic properties were determined by parallel field vibrating-sample magnetometry method. The results indicated that the magnetic properties are a function of polymer concentration in the nanocomposite particle.