Abstract
The mono-disperse magnetic cross-linked composite micro-spheres containing carboxyl groups have been prepared by an improving method of emulsion polymerization in this paper. Firstly, Fe3O4 magnetic nanoparticles were synthesized by co-precipitation, and the Fe3O4 magnetic nanoparticles were modified by oleic acid. Secondly, DVB as cross-linker, SDBS as emulsifier and AIBN as initiator, the mono-disperse magnetic cross-linked composite micro-spheres were obtained in aqueous, and consisted of the copolymer of styrene and acrylic acid as shell and the Fe3O4 magnetic nanoparticles as core. The magnetic cross-linked micro-spheres would be the rudiment of the magnetic nanonetwork, and be expected to apply a great deal of fields in the future.
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