期刊
EUROPEAN POLYMER JOURNAL
卷 45, 期 7, 页码 2023-2032出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2009.04.002
关键词
Magnetite; Core-shell microsphere; Distillation precipitation polymerization; Tri-layer hybrid
资金
- National Science Foundation of China [20870409]
Tri-layer magnetite/silica/poly(divinyl benzene) (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 2,2'-azobisisobutyronitrile (AIBN) as initiator to coat magnetite/MPS-modified 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/poly(N,N'-methylene-bisacrylamide-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). (C) 2009 Elsevier Ltd. All rights reserved.
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