Controlled preparation of Fe3O4/P (St-MA) magnetic composite microspheres by DPE method

Abstract

In this work, controlled radical polymerization based on 1, 1-diphenylethylene (DPE method) was used to prepare magnetic composite microspheres. By this method, Fe3O4/P (St-MA) magnetic composite microspheres were prepared via copolymerization of styrene (St) and maleic anhydride (MA) using DPE as radical control agent in the presence of Fe3O4 nanoparticles. The structure and properties of the magnetic composite microspheres obtained were characterized by IR, 1H-NMR, SEC-MALLS, TEM, TGA, VSM, DLS and other instruments. It was found that the DPE method allows the controlled preparation of magnetic composite microspheres, and Fe3O4/ P(St-MA) microspheres possess perfect sphere-shaped morphology, homogeneous particle size, carboxylic surface, superparamagnetism with a saturation magnetization of 14.704 emu/g, and magnetic content with a value of 25%.