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Preparation and characterization of micron‐sized magnetic microspheres by one‐step suspension polymerization
Author(s) -
Liu Zuli,
Liu Cuicui,
Yao Kailun,
Liu Pandong,
Ning Qin
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.26180
Subject(s) - copolymer , materials science , suspension polymerization , methacrylic acid , superparamagnetism , polymer chemistry , monomer , dispersion polymerization , benzoyl peroxide , polymerization , styrene , fourier transform infrared spectroscopy , chemical engineering , vinyl alcohol , magnetic nanoparticles , methyl methacrylate , glycidyl methacrylate , nanoparticle , polymer , composite material , nanotechnology , magnetization , physics , quantum mechanics , magnetic field , engineering
Micron‐sized magnetic microspheres with different functional groups were prepared by one‐step suspension copolymerization of styrene, divinyl benzene, and methyl methacrylate in the presence of oleic acid‐coated magnetic nanoparticles. In the present work, we used benzoyl peroxide as an initiator and poly(vinyl alcohol) (PVA‐1788; degree of polymerization: 1,700; degree of hydrolysis: 88%) as a stabilizer. We also added acrylamide (AM) monomer in the aqueous phase and methacrylic acid (MAA) in the oil phase. The morphology and properties of the resulting magnetic microspheres were examined by optical micrographs (OMs), vibrating‐sample magnetometer (VSM), and Fourier transform infrared spectrometer (FT IR). The results showed the three products have uniform and spherical form with superparamagnetism and well dispersion. Moreover, we found that monomer AM had a little contribution to the copolymerization, and MAA could strikingly decrease the diameter of the final microspheres. The magnetic microspheres with functional groups could be linked well with the IgG‐FITC. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007