writer：Guangyu Liu, Hui Wang, Xinlin Yang*
keywords：Tri-layer hybrid, Distillation preciptation polymerization
source：期刊
specific source：Eur. Polym. J. 45 (7), 2023-2032 (2009). DOI: 10.1016/j.eurpolymj.2005.04.034
Issue time：2009年
Tri-layer magnetite/silica/poly(divinylbenzene)(Fe3O4/SiO2/PDVB) core-shell hybrid microspheres
were prepared by distillation precipitation polymerization of divinylbenzene (DVB) in the presence of magnetite/3-(methacryloxyl)propyl trimethoxysilane (MPS) modified silica core-shell particles as seeds. The polymerization of DVB was performed in neat
acetonitrile with 2,20-azobisisobutyronitrile (AIBN) as initiator to coat magnetite/MPSmodified silica particles through the capture of DVB oligomers with the aid of vinyl groups on the surface of inorganic seeds in absence of any stabilizer or surfactant. Other magnetite/silica/polymer tri-layer hybrid particles, such as magnetite/silica/poly(ethyleneglycol dimethacrylate) (Fe3O4/SiO2/PEGDMA) and magnetite/silica/poly(ethyleneglycol dimethacrylate-
co-methacrylic acid) (Fe3O4/SiO2/P(EGDMA-co-MAA)) with various polarity and functionality, were also prepared by this procedure. Magnetite/silica/polyN,N-methylenebisacrylamide-co-methacrylic acid) (Fe3O4/SiO2/P(MBAAm-co-MAA)) were synthesized with unmodified magnetite/silica particles as seeds. The resultant tri-layer hybrid particles
were characterized by transmission electron microscopy (TEM), Fourier transform infrared spectra (FT-IR), dynamic light scattering, and vibrating sample magnetometer (VSM).