Abstract
Magnetic fluids (magnetite/oleic acid/benzene) with excesses of a surfactant (oleic acid) are studied using small-angle neutron scattering. Solutions of oleic acid in benzene are also studied to reveal whether an aggregation of acid molecules can occur. It is shown that oleic acid does not form micelles in benzene in the range of concentrations under study (up to volume fractions of 35%). It follows from our results that the excess of a surfactant (less than a volume fraction of 25%) in a magnetic fluid does not lead to a noticeable aggregation of its particles. At the same time, an increase in the attraction between free surfactant molecules in the magnetic fluid (compared to pure solutions of oleic acid in benzene) is observed. If the excess of a surfactant is greater than 25%, then the stability of the magnetic fluid is sharply violated, which leads to the aggregation of magnetic particles.
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References
Magnetic Fluids and Applications Handbook, Ed. by B. Berkovski (Beggel House, New York, 1996).
Proceedings of the 6th Intern. Conference on Clinical and Scientific Applications of Magnetic Carriers (Krems, 2006).
H. B. Wang, Y. M. Li, and D. S. Liu, Chem. J. Chinese Univ. 25, 140 (2004).
P. Izquierdo, J. Esquena, Th. F. Tadros, et al., Langmuir 18, 26 (2002).
A. B. Jódar-Reyes, A. Martin-Rodriguez, and J. L. Ortega-Vinuesa, J. Colloid Interface Sci. 298, 248 (2006).
V. L. Alexeev, J. Colloid Interface Sci. 206, 416 (1998).
J. Bibette, D. Roux, and B. Pouligny, J. Phys. II France 2, 401 (1992).
P. Rosensweig, Ferrohydrodynamics (Cambridge Univ. Press, Cambridge, 1985; Mir, Moscow, 1989).
V. Yu. Bezzabotnov, L. Cser, T. Grosz, et al., J. Phys. Chem. 96, 976 (1992).
Yu. M. Ostanevich, Macromol. Chem. 15, 91 (1988).
I. N. Serdyuk, Physica B: Condens. Matter 234–236, 892 (1997).
B. Jacrot, Rep. Prog. Phys. 39, 911 (1976).
M. V. Avdeev, M. Balasoiu, V. L. Aksenov, et al., J. Magn. Magn. Mater. 270, 371 (2004).
G. Jancsó, L. Cser, T. Grósz, et al., Pure Appl. Chem. 66, 515 (1994).
L. Cser, B. Farago, T. Grosz, et al., Physica B: Condens. Matter 180–181, 848 (1992).
A. G. Ramazanova, V. I. Yashkova, O. V. Balmasova, et al., Khim. Biol. 55, 666 (2006).
A. G. Ramazanova, V. V. Korolev, and E. V. Ivanov, Rus. J. Phys. Chem. A 81, 560 (2007).
C. Tanford, J. Phys. Chem. 76, 3020 (1972).
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Original Russian Text © V.I. Petrenko, M.V. Avdeev, V.L. Aksenov, L.A. Bulavin, L. Rosta, 2009, published in Poverkhnost’. Rentgenovskie, Sinkhrotronnye i Neitronnye Issledovaniya, No. 2, pp. 92–96.
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Petrenko, V.I., Avdeev, M.V., Aksenov, V.L. et al. Magnetic fluids with excesses of a surfactant according to the data of small-angle neutron scattering. J. Surf. Investig. 3, 161–164 (2009). https://doi.org/10.1134/S1027451009010261
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DOI: https://doi.org/10.1134/S1027451009010261