Synthesis of highly loaded and well-controlled magnetic beads via emulsion polymerization

• Published in: Journal of applied polymer science Vol. 129; no. 4; pp. 1726 - 1733
• Main Authors: Kniajanski, Sergei, Colborn, Robert E., Bales, Brian C., Riccobono, Orrie, Dulgar-Tulloch, Aaron J., Stein, Judith, Kandapallil, Binil I. I.
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 15.08.2013; Wiley; Wiley Subscription Services, Inc
• Subjects: Applied sciences; Beads; Composites; emulsion; Emulsion polymerization; Exact sciences and technology; Forms of application and semi-finished materials; Iron oxides; Ligands; magnetic beads; Materials science; Polymer industry, paints, wood; Polymerization; Polymers; polystyrene; Polystyrene resins; Reproduction; Styrenes; superparamagnetic iron oxide; Technology of polymers; Methacrylic acid esters; Iron oxide; polystyrene; Superparamagnetism; Experimental study; Composite particles; Surface treatment; Submicron particle; Magnetic particles; Free radical polymerization; magnetic beads; Emulsion polymerization; Oleic acid; Morphology; Preparation; superparamagnetic iron oxide; emulsion; Styrene polymer; Magnetic properties
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.38857

Superparamagnetic iron oxide (SPIO) incorporated polystyrene beads of uniform size distribution (∼170 nm) and high magnetic content (∼40%) are synthesized by emulsion styrene polymerization in the presence of functionalized SPIO. The role of surface functionality on the polymerization process and SPIO incorporation is investigated by carrying out styrene emulsion polymerizations with different functionalities on SPIO. A unique combination of oleic acid and (2‐acetoacetoxy) ethyl methacrylate as surface ligands for SPIO is used to attain the best magnetic beads. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013