Preparation and characterization of P(St-GMA)/Fe₃O₄ magnetic polymer microspheres

The Fe₃O₄ nano-particles were prepared by a precipitation method, and the magnetic polymer microspheres P(St-GMA)/Fe₃O₄ were synthesized by dispersion polymerization using the modified Fe₃O₄, styrene (St) and glucidylmethacrylate (GMA). The morphology and crystal structure of Fe₃O₄ nano-particles were investigated. The influence of preparation conditions for the magnetic microspheres on their magnetite content was analyzed. The microstructure of the magnetic microspheres was characterized via X-ray diffraction (XRD), thermal analysis (TG) and Fourier transform infrared spectrometer (FTIR). The results indicated that the size distribution of the magnetic polymer microspheres was narrow, and the content of the magnetite in the microsphere was 74% at most.