Effect of surfactant excess on the stability of low-polarity ferrofluids probed by small-angle neutron scattering
- Авторы: Petrenko V.1,2, Avdeev M.1, Bulavin L.2, Almasy L.3, Grigoryeva N.4, Aksenov V.5,1
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Учреждения:
- Joint Institute for Nuclear Research
- Taras Shevchenko National University of Kyiv
- Wigner Research Centre for Physics
- St. Petersburg State University
- Konstantinov Petersburg Nuclear Physics Institute
- Выпуск: Том 61, № 1 (2016)
- Страницы: 121-125
- Раздел: Diffraction and Scattering of Neutrons
- URL: https://journals.rcsi.science/1063-7745/article/view/189691
- DOI: https://doi.org/10.1134/S1063774516010168
- ID: 189691
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Аннотация
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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Об авторах
V. Petrenko
Joint Institute for Nuclear Research; Taras Shevchenko National University of Kyiv
Автор, ответственный за переписку.
Email: vip@nf.jinr.ru
Россия, Dubna, Moscow oblast; Kyiv
M. Avdeev
Joint Institute for Nuclear Research
Email: vip@nf.jinr.ru
Россия, Dubna, Moscow oblast
L. Bulavin
Taras Shevchenko National University of Kyiv
Email: vip@nf.jinr.ru
Украина, Kyiv
L. Almasy
Wigner Research Centre for Physics
Email: vip@nf.jinr.ru
Венгрия, Budapest
N. Grigoryeva
St. Petersburg State University
Email: vip@nf.jinr.ru
Россия, St. Petersburg
V. Aksenov
Konstantinov Petersburg Nuclear Physics Institute; Joint Institute for Nuclear Research
Email: vip@nf.jinr.ru
Россия, Gatchina; Dubna, Moscow oblast