Synthesis of Magnetic Molecularly Imprinted Polymer forFood Color by Surface Modification of Fe3O4

Magnetic molecularly imprinted polymers (MMIPs) have become a hotspot these days, owing to the dual functions of target recognition and magnetic separation. In this research, magnetite Fe3O4 nanoparticles (NPs) were modified, in aqueous solution, and then used as a precursor in synthesis of magnetic molecularly imprinted polymer for a food color dye. Firstly, Fe3O4 NPs was coated by silica, and then theparticles were successfully modified by 3-aminopropyltriethoxysilane (APTES). The surface polymerization was then carried out for preparation of MMIP. Using a novel, time saving and easy method all in aqueous solution makes this process green and unique among all modification methods. The resulting particles were characterized by FTIR and TGA techniques.

Keywords:

Surface modification , Magnetic molecularly imprinted polymer , Tartrazine , Stöberprocess , APTES