Preparation and characterization of manganese, nickel and cobalt ferrites submicron particles in sulfonated crosslinked networks

Magnetic submicron particles of MnFe 2O 4, NiFe 2O 4 or CoFe 2O 4 were created in or around the porous sulfonated beads based on poly(styrene- co-divinylbenzene) using an in situ inorganic precipitation procedure. The copolymer beads were treated with a mixed iron/cobalt chloride electrolyte and the...

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Bibliographic Details
Published in:Polymer (Guilford) 2005-11, Vol.46 (25), p.11288-11293
Main Authors: Santa Maria, L.C., Costa, M.A.S., Soares, J.G.M., Wang, S.H., Silva, M.R.
Format: Article
Language:English
Subjects:
Applied sciences
Composites
Exact sciences and technology
Ferrite
Forms of application and semi-finished materials
Magnetic properties
Polymer
Polymer industry, paints, wood
Technology of polymers
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Summary:Magnetic submicron particles of MnFe 2O 4, NiFe 2O 4 or CoFe 2O 4 were created in or around the porous sulfonated beads based on poly(styrene- co-divinylbenzene) using an in situ inorganic precipitation procedure. The copolymer beads were treated with a mixed iron/cobalt chloride electrolyte and the doped copolymer networks were converted to their oxides by reaction with sodium hydroxide and potassium nitrate in aqueous solution. Energy dispersive X-ray spectroscopy (EDS) coupled to scanning electron microscopy (SEM) allowed the observation of the presence of submicron particles in the 0.1–0.5 μm size range, which chemical microanalysis of emitted X-rays revealed the presence of metal oxide particle, such as nickel, manganese or cobalt iron oxide. The morphological features of the binary material particles have depended on the ferrite type. All beads have presented dispersed and agglomerated submicron particles of ferrite located on their surface and inner part as well. Magnetization data of the microbeads showed good ferromagnetic behavior.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2005.09.055