Dispersity of magnetite in magnetic liquids and the interaction with a surfactant

The dispersity of ferrophase particles and the interaction with a surfactant in magnetic liquids based on magnetite stabilized by oleic acid are investigated. It is shown that oleic acid at the surface of the ferrophase is free and/or chemically bound. When preparing and aging the magnetic liquid, o...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 1990-04, Vol.85 (1), p.14-16
Main Authors: Lesnikovich, A.I., Shunkevich, T.M., Naumenko, V.N., Vorobyova, S.A., Baykov, M.V.
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
General, apparatus, technics of preparation
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Summary:The dispersity of ferrophase particles and the interaction with a surfactant in magnetic liquids based on magnetite stabilized by oleic acid are investigated. It is shown that oleic acid at the surface of the ferrophase is free and/or chemically bound. When preparing and aging the magnetic liquid, oleic acid undergoes an oxidative destruction; the partial oxidation of magnetite can also occur. Recommendations for stabilization of the magnetic liquid properties and constitution are stated.
ISSN:0304-8853
DOI:10.1016/0304-8853(90)90007-D