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http://www.scirp.org/journal/PaperInformation.aspx?PaperID=20240#.VNCDsyzQrzE
ABSTRACT
Processing
of fine particles in a slurry is a difficult problem. Methods to make
fine particles magnetic have been developed recently and may offer a
solution to this problem. Particles of nonmagnetic materials can be
selectively rendered magnetic through surface interactions with magnetic
reagents, which are prepared by dispersing nanoscale magnetite (about
10 nm diameter) with surfactants. When adsorption occurs, the magnetic
susceptibility of the material is increased. Magnetic enhancement at
several orders of magnitude can be achieved. Selectivity of the
adsorption can be controlled by the functional groups of magnetic
reagents and various surface interaction mechanisms. This approach
allows a new degree of freedom for the processing of fine particles,
even with conventional magnetic means. Separation and filtration are
examples of the applications.
KEYWORDS
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References
J. HWANG, "Adsorption of Surfactant Dispersed Nanometer Magnetite," Journal of Minerals and Materials Characterization and Engineering, Vol. 1 No. 2, 2002, pp. 131-140.
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