Synthesis of Poly(β-cyclodextrin-maleic anhydride) Conjugated Magnetic Nanoparticles via RAFT Polymerization for Adsorption of Organic Compound

Abstract

In this paper, novel magnetic nanoparticles by initiating maleic anhydride-β-cyclodextrin (MAHCD) polymerization onto the surface of Fe3O4 nanoparticles were prepared. Firstly, MNPs were modified by silane couple agent, and then the modified MNPs reacted with 3-benzylsulfanyl thiocarbonyl sulfanyl propionic acid chloride to obtain RAFT chain transfer modified Fe3O4 nanoparticles. Then, maleic anhydride-β-cyclodextrin (MAHCD) was prepared by the reaction of maleic anhydride with β-cyclodextrin. Finally, MNP@P(MAHCD-co-MMA) nanoparticles were prepared using MAHCD and methyl methacrylate (MMA) as monomers and modified Fe3O4 nanoparticles as chain transfer agent by RAFT in the presence of initiator AIBN. The structure and size of the MNP@P(MAHCD-co-MMA) nanoparticles were confirmed by FTIR, TGA, XRD and TEM. The results showed that the MNP@P(MAHCD-co-MMA) nanoparticles about 200 nm were successfully prepared. Moreover, the MNP@P(MAHCD-co-MMA) nanoparticles showed well adsorption property using hydroxylbenzoic acid as the guest compound. Therefore, the MNP@P(MAHCD-co-MMA) nanoparticles have the capability to adsorb suitable guest compounds, and could be used for water treatment.