Effect of surfactant excess in non-polar ferrofluids probed by small-angle neutron scattering

V. I. Petrenko, M. V. Avdeev, V. L. Aksenov, L. A. Bulavin, LRosta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

The microstructure of ferrofluids (magnetite/oleic acid/benzene) with an excess of free oleic acid is investigated by small-angle neutron scattering (SANS). For such excess higher than 25 vol. % a sharp break in the stability of ferrofluids occurs followed by coagulation and precipitation. Below this value the influence of the surfactant excess on the stability of ferrofluids is insignificant; neither particle aggregation nor surfactant agglomeration is observed. The interaction of free acid molecules in the ferrofluids is compared with that in pure benzene solutions. A significant increase in the attraction is observed for acid molecules in the ferrofluids, which is related to the loss of magnetic fluids stability at high excess of acid.

Original languageEnglish
Title of host publicationMagnetism and Magnetic Materials
PublisherTrans Tech Publications Ltd
Pages198-201
Number of pages4
ISBN (Print)390845168X, 9783908451686
DOIs
Publication statusPublished - Jan 1 2009
EventForth Moscow International Symposium on Magnetism MISM2008 - Moscow, Russian Federation
Duration: Jun 20 2008Jun 25 2008

Publication series

NameSolid State Phenomena
Volume152-153
ISSN (Print)1012-0394

Other

OtherForth Moscow International Symposium on Magnetism MISM2008
CountryRussian Federation
CityMoscow
Period6/20/086/25/08

Keywords

  • Ferrofluids stability
  • Small-angle neutron scattering
  • Surfactant excess

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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  • Cite this

    Petrenko, V. I., Avdeev, M. V., Aksenov, V. L., Bulavin, L. A., & LRosta (2009). Effect of surfactant excess in non-polar ferrofluids probed by small-angle neutron scattering. In Magnetism and Magnetic Materials (pp. 198-201). (Solid State Phenomena; Vol. 152-153). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/SSP.152-153.198