Facile fabrication of core-shell structured magnetic Fe sub(3)O sub(4)/cross-linked polyphosphazene nanocomposite particles with high stability

We herein report a facile approach to the fabrication of core-shell structured magnetic Fe sub(3)O sub(4)/poly(cyclotriph osphazene-co-4,4'-sulfonyldiphenol) nanocomposite particles via precipitation polymerization of comonomers hexachlorocyclotriphosphazene and 4,4'-sulfonyldiphenol in the presence of Fe sub(3)O sub(4) nanopaticles. The morphology, composition, thermal property, and magnetic property of the magnetic nanocomposite particles were characterized by scanning electron microscope, transmission electron microscope, Fourier transform infrared spectra, energy dispersive X-ray spectroscopy, X-ray diffraction, thermogravimetric analysis, and vibrating sample magnetometer, respectively. Results indicated that the submicron-sized magnetic nanocomposite particles own core/shell structures, 410 degree C of initial decomposition temperature under an air atmosphere, and 6.2 emu/g of saturation magnetization, which should make them have potential applications in biotechnology and catalyst supports. Furthermore, we also proposed a possible formation mechanism of these magnetic Fe sub(3)O sub(4)/PZS nanocomposite particles.