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Light Diffraction in Magnetic Emulsions with High Interfacial Tension

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Abstract

Specific features of small-angle light scattering by aqueous magnetic emulsions under the action of a magnetic field and a hydrodynamic field of a rotating fluid have been investigated. It has been shown that the experimentally observed diffraction lines that have no pronounced maxima and minima are due to diffraction on an irregular system of droplet chains arising in the magnetic field. Under the combined action of the magnetic and hydrodynamic fields, a rotation of a diffraction line is observed. This phenomenon has been interpreted using the known models of orientation of extended particles having complex shapes. It has been shown that the experimental nonlinear dependence of the rotation angle of a droplet chain on the angular rate of fluid rotation may be explained by S-shaped deformations of a chain.

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Funding

This work was supported by the state order of the Ministry of Higher Education and Science of the Russian Federation for the implementation of research works (project no. 0795-2020-0030).

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Authors and Affiliations

  1. North Caucasus Federal University, Institute of Mathematics and Natural Sciences, 355017, Stavropol, Russia

    K. V. Erin & S. S. Belykh

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  1. K. V. Erin
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  2. S. S. Belykh
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Correspondence to K. V. Erin.

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Erin, K.V., Belykh, S.S. Light Diffraction in Magnetic Emulsions with High Interfacial Tension. Colloid J 82, 672–680 (2020). https://doi.org/10.1134/S1061933X20060046

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  • DOI: https://doi.org/10.1134/S1061933X20060046

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