Catechol Derivative RAFT Agent for Surface Functionalization of Magnetic Nanoparticles

Abstract

Functional nanoparticles (NPs), Fe₃O₄@SiO₂-PMEMA, were prepared via surface initiated reversible addition-fragmentation chain transfer (RAFT) polymerization, using catechol-based biomimetic RAFT agent incorporating a trithiocarbonate unit and 2-N-morpholinoethyl methacrylate (MEMA) as the monomer. Poly(2-N-morpholinoethyl methacrylate) (PMEMA) were synthesized on biomimetic RAFT agent functionalized Fe₃O₄@SiO₂ NPs surface. The prepared NPs were characterized at the different modification stages using attenuated total reflectance-Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and transmission electron microscope (TEM). The magnetic properties of NPs were also determined by vibrating sample magnetometer (VSM).

Keywords

• Biomimetic,catechol derivatives,magnetic nanoparticles,RAFT polymerization

References

1. Wu, Y.; Yang, H.; Lin, Y.; Zheng, Z.; Ding, X. Poly(N-isopropylacrylamide) modified Fe3O4@Au nanoparticles with magnetic and temperature responsive properties. Mater. Lett. 2016; 169, 218-222.