Synthesis and Properties of Micron-size Magnetic Polymer Spheres with Epoxy Groups

Abstract

Abstract: Micron-size superparamagnetic poly(styrene-divinylbenzene-glycidyl methacrylate) (PSt-DVB-
GMA)spheres were prepared via a modified suspension copolymerization method. Oleic acid
coated magnetite (Fe3O4)nanoparticles made by co-precipitation were first mixed with
monomers of St, DVB, GMA, and benzoyl peroxide (BPO) to form oil in water suspension with
the presence of poly(vinyl pyrrolidone) (PVP-K30) as a stabilizer.Then the temperature of
mixture was increased at a controlled rate to obtain small and relatively uniform
droplets.Finally, the copolymerization reaction was initiated by the decomposition of BPO.
The morphology and properties of magnetic PSt-DVB-GMA microspheres were examined by SEM,
TEM, VSM, XRD and FT-IR. The magnetic microspheres obtained have very small size (about 4-7
μm) in diameter with narrow size distribution and superparamagnetic characteristics.
Powder X-ray diffraction measurements show the inverse cubic spinel structure for the
magnetite dispersed in polymer microspheres. FT-IR spectroscopy indicates extensive oxirane
groups existed on the surface of magnetic PSt-DVB-GMA microspheres.

Key words: magnetic microsphere, synthesis, suspension polymerization, bioseparation

摘要： Micron-size superparamagnetic poly(styrene-divinylbenzene-glycidyl methacrylate) (PSt-DVB-
GMA)spheres were prepared via a modified suspension copolymerization method. Oleic acid
coated magnetite (Fe3O4)nanoparticles made by co-precipitation were first mixed with
monomers of St, DVB, GMA, and benzoyl peroxide (BPO) to form oil in water suspension with
the presence of poly(vinyl pyrrolidone) (PVP-K30) as a stabilizer.Then the temperature of
mixture was increased at a controlled rate to obtain small and relatively uniform
droplets.Finally, the copolymerization reaction was initiated by the decomposition of BPO.
The morphology and properties of magnetic PSt-DVB-GMA microspheres were examined by SEM,
TEM, VSM, XRD and FT-IR. The magnetic microspheres obtained have very small size (about 4-7
μm) in diameter with narrow size distribution and superparamagnetic characteristics.
Powder X-ray diffraction measurements show the inverse cubic spinel structure for the
magnetite dispersed in polymer microspheres. FT-IR spectroscopy indicates extensive oxirane
groups existed on the surface of magnetic PSt-DVB-GMA microspheres.

关键词: magnetic microsphere;synthesis;suspension polymerization;bioseparation

LIU Xianqiao, GUAN Yueping, XING Jianmin, MA Zhiya, LIU Huizhou. Synthesis and Properties of Micron-size Magnetic Polymer Spheres with Epoxy Groups[J]. .

刘先桥, 官月平, 邢建民, 马志亚, 刘会洲. 带环氧基的超顺磁性高分子微球的制备及其性能表征[J]. CIESC Journal.

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