Abstract
Polymer magnetic core particles receive growing attention due to these materials owing magnetic properties which are widely used in different applications. The prepared composite particles are characterized with different properties namely: a magnetic core, a hydrophobic first shell, and finally an external second hydrophilic shell. The present study describes a method for the preparation of bi-layered polymer magnetic core particles (diameter range is 50–150 nm). This method comprises several steps including the precipitation of the magnetic iron oxide, coating the magnetite with oleic acid, attaching the first polymer shell by miniemulsion polymerization and finally introducing hydrophilic surface properties by condensation polymerization. The first step is the formation of magnetite nanoparticles within a co-precipitation process using oleic acid as the stabilizing agent for magnetite. The second step is the encapsulation of magnetite into polyvinylbenzyl chloride particles by miniemulsion polymerization to form a magnetic core with a hydrophobic polymer shell. The hydrophobic shell is desired to protect magnetite nanoparticles against chemical attack. The third step is the coating of magnetic core hydrophobic polymer shell composites with a hydrophilic layer of polyethylene glycol by condensation polymerization. Regarding the miniemulsion polymerization the influence of the amount of water, the mixing intensity and the surfactant concentration were studied with respect to the formation of particles which can be further used in chemical engineering applications. The resulting magnetic polymer nanoparticles were characterized by particle size measurement, chemical stability, iron content, TEM, SEM, and IR.
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Yuan CL, Hong YS (2010) J Mater Sci 45:3470. doi:10.1007/s10853-010-4375-x
Elaissari A, Bosc E, Pichot C, Mandrand B, Bibette J, Mondain-Monval O (1999) French Patent 2800635
Murray MJ, Snowden MJ (1995) Adv Colloid Interface Sci 54:73
Ugelstad J, Berge A, Ellingsen T (1992) Prog Polym Sci 17:87
Kim DK, Zhang Y, Voit W, Rao KV, Kehr J, Bjelke B, Muhammed M (2001) Scripta Mater 44:1713
Puntes VF, Krishanan KM, Alivisatos AP (2001) Science 291:2115
Bizdoaca EL, Spasova M, Farle M, Hilgendorff M, Caruso F (2002) J Magn Magn Mater 240:44
Veiga V, Ryan D, Sourty E, Llanes F, Marchessault R (2000) Carbohydr Polym 42:353
Lovell PA, EL-Aasser MS (1997) Emulsion polymerization and emulsion polymers. Willy, New York
Rana S, White P, Bradley M (1999) Tetrahedron Lett 40:8137
Sucholeiki I, Manuel Perez G (1999) Tetrahedron Lett 40:3531
Sarobe J, Molina-Bolìvar JA, Forcada J, Galisteo F, Hidalgo-Álvarez R (1998) Macromolecules 31:4282
Sheng Q, Stöver H (1997) Macromolecules 30:6712
Darwish MSA, Machunsky S, Peuker U, Kunz U, Turek T (2010) J Polym Res. doi:10.1007/s10965-010-9393-5
Machunsky S, Grimm P, Schmid H, Peuker U (2009) Colloids Surf A 348:186
Xianqlao L, Kaminski D, Yueping G, Haitao C, Huizhou L, Rosengart A (2006) J Magn Magn Mater 306:248
Ramírez P, Katharina L (2003) Macromol Chem Phys 204:22
Banert T, Peuker U (2006) J Mater Sci 41:3051. doi:10.1007/s10853-006-6976-y
Varoujan A, May S, Jacqueline M, Jocelyn J (2002) Tetrahedron Lett 43:9023
ASTM E394-00, Standard test method for iron in trace quantities using the 1,10-phenanthroline method, 2000
Elmes AR (1991) US Patent 4,985,468
Barby D (1985) US Patent 4,522,953
Zheng W, Gao F, Gu H (2005) J Magn Magn Mater 288:403
Yamaura M, Camilo RL, Sampaio LC, Macedo MA, Nakamura M, Toma HE (2004) J Magn Magn Mater 279:210
Korolev VV, Ramazanova AG, Blinov AV (2002) Russ Chem Bull 51:2044
Yan F, Li J, Zhang J, Liu F, Yang W (2009) J Nanopart Res 11:289
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Darwish, M.S.A., Peuker, U., Kunz, U. et al. Bi-layered polymer–magnetite core/shell particles: synthesis and characterization. J Mater Sci 46, 2123–2134 (2011). https://doi.org/10.1007/s10853-010-5048-5
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DOI: https://doi.org/10.1007/s10853-010-5048-5