Double-miniemulsion preparation of Fe₃O₄/poly(methyl methacrylate) magnetic latex

Magnetic poly(methyl methacrylate) (PMMA) microspheres were prepared by double-miniemulsion polymerization. First, oleic acid coated magnetite particles synthesized by means of coprecipitation were dispersed into octane to obtain a ferrofluid. The ferrofluid and MMA were emulsified to form O/W emuls...

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Bibliographic Details
Published in:Journal of applied polymer science 2009-04, Vol.112 (1), p.89-98
Main Authors: Hong, R.Y, Feng, B, Cai, X, Liu, G, Li, H.Z, Ding, J, Zheng, Y, Wei, D.G
Format: Article
Language:English
Subjects:
Applied sciences
Composites
Exact sciences and technology
Forms of application and semi-finished materials
magnetic
miniemulsion polymerization
Polymer industry, paints, wood
polymer microsphere
Technology of polymers
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Summary:Magnetic poly(methyl methacrylate) (PMMA) microspheres were prepared by double-miniemulsion polymerization. First, oleic acid coated magnetite particles synthesized by means of coprecipitation were dispersed into octane to obtain a ferrofluid. The ferrofluid and MMA were emulsified to form O/W emulsion, respectively. Subsequently two miniemulsions were mixed together for polymerization. The obtained magnetic polymer particles were characterized by Fourier transform infrared spectroscopy, transmission electron microscopy, scanning electron microscopy, X-ray powder diffraction, and thermogravimetry. The results showed that oleic acid coated magnetite particles were well encapsulated in PMMA. The effects of initiator dosage and monomer concentration on the conversion of MMA were also investigated.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.29403