Synthesis of monodisperse,magnetic latex particles with polystyrene core |
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Authors: | Shunchao?Gu Toshiaki?Shiratori Email author" target="_blank">Mikio?KonnoEmail author |
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Institution: | (1) Department of Chemical Engineering, Tohoku University, 980–8579 Sendai, Japan; |
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Abstract: | A novel method for producing monodisperse, submicron-sized magnetic latex particles is described. The method provides coating of polymer particles with surface-modified magnetic particles during soap-free polymerization. Experiments were performed with styrene monomer, potassium persulfate initiator, Fe 3O 4 magnetic particles, and silane-coupling reagents of methacryloxypropyltrimethoxysilane (MPTMS) and methacryloxypropyldimethoxysilane (MPDMS). The morphology of the magnetic particles depended on the silane-coupling reagents. Use of the tri-functional coupling reagent MPTMS produced particles having a disk-like or concave-like shape, whereas use of the di-functional coupling reagent MPDMS produced spherical particles that had a coefficient of variation of 4.4%, which was much smaller than the standard criteria of monodispersity, 10%. |
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