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Analysis of factors affecting preparation of magnetic Fe3O4@PS nanospheres

Abstract In this paper, Fe3O4@PS magnetic nanospheres were synthesized by miniemulsion polymerization under different reaction conditions, and their microstructures were observed by transmission electron microscopy. The results show that the shape of magnetic nanospheres changes with temperature and stirring rate. The appearance will also change. We obtained the best morphology when the temperature is 70 °C and the stirring rate is 200 rpm. The particle size of Fe3O4@PS nanospheres with superparamagnetism is about 120 ∼ 150 nm.