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Effect of surfactant excess on the stability of low-polarity ferrofluids probed by small-angle neutron scattering

Crystallography Reports volume 61, pages 121–125 (2016)Cite this article

Abstract

The structures of ferrofluids (FFs) based on nonpolar solvent decahydronaphthalene, stabilized by saturated monocarboxylic acids with hydrocarbon chains of different lengths, C16 (palmitic acid) and ?12 (lauric acid), with an excess of acid molecules, have been studied by small-angle neutron scattering. It is found that the addition of acid to an initially stable system with optimal composition leads to more significant structural changes (related to aggregation) than those observed previously for this class of FFs. A comparison of the influence of monocarboxylic acids on the stability of nonpolar FFs suggests that the enhancement of aggregation is much more pronounced in the case of palmitic acid excess. This fact confirms the conclusion of previous studies, according to which an increase in the hydrocarbon chain length in a saturated acid reduces the efficiency of the corresponding FF stabilization.

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Authors and Affiliations

  1. Joint Institute for Nuclear Research, Dubna, Moscow oblast, Russia

    V. I. Petrenko, M. V. Avdeev & V. L. Aksenov

  2. Taras Shevchenko National University of Kyiv, Kyiv, Ukraine

    V. I. Petrenko & L. A. Bulavin

  3. Wigner Research Centre for Physics, Hungarian Academy of Science, Budapest, Hungary

    L. Almasy

  4. St. Petersburg State University, St. Petersburg, Russia

    N. A. Grigoryeva

  5. Konstantinov Petersburg Nuclear Physics Institute, National Research Centre “Kurchatov Institute”, Gatchina, Russia

    V. L. Aksenov

Authors
  1. V. I. Petrenko
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  2. M. V. Avdeev
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  3. L. A. Bulavin
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  4. L. Almasy
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  5. N. A. Grigoryeva
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  6. V. L. Aksenov
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Correspondence to V. I. Petrenko.

Additional information

Original Russian Text © V.I. Petrenko, M.V. Avdeev, L.A. Bulavin, L. Almasy, N.A. Grigoryeva, V.L. Aksenov, 2016, published in Kristallografiya, 2016, Vol. 61, No. 1, pp. 132–137.

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Petrenko, V.I., Avdeev, M.V., Bulavin, L.A. et al. Effect of surfactant excess on the stability of low-polarity ferrofluids probed by small-angle neutron scattering. Crystallogr. Rep. 61, 121–125 (2016). https://doi.org/10.1134/S1063774516010168

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  • DOI: https://doi.org/10.1134/S1063774516010168

Keywords

  • Surfactant
  • Magnetite
  • Palmitic Acid
  • Magnetic Nanoparticles
  • Crystallography Report