Study on the applicability of dynamic light scattering (DLS) to microemulsions including supercritical carbon dioxide-swollen micelles

Cadogan S, Hahn CJ, Rausch MH, Fröba AP (2017)


Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2017

Journal

Publisher: ACADEMIC PRESS INC ELSEVIER SCIENCE

Book Volume: 499

Pages Range: 202-208

DOI: 10.1016/j.jcis.2017.03.111

Abstract

The applicability of dynamic light scattering (DLS) for the characterization of the size of supercritical carbon dioxide (sc-CO2)-swollen micelles in a polyester polyol-based multicomponent microemulsion with non-ionic surfactant has been thoroughly proved for the first time in this work. Systematic experiments confirming that a hydrodynamic mode is observable in either a homodyne or a heterodyne detection scheme as well as the evaluation of the influence of the laser power applied to the slightly colored microemulsion have ensured an accurate implementation of this technique for a technically relevant system. The correlation times associated with the translational diffusion coefficient of the swollen micelles in a continuous liquid phase were measured for temperatures from (298.15 to 338.15) K at pressures of (90 and 100) bar. While there was no significant effect of pressure, it was found that the translational diffusion coefficient increases with increasing temperature as expected. We postulate this is primarily related to the effect of decreasing viscosity of the continuous phase. An estimation of the hydrodynamic diameter of the sc-CO2-swollen micelles is in good agreement with values for similar systems reported in the literature. For the derivation of absolute sizes for corresponding systems, also dynamic viscosity and refractive index data will be determined simultaneously in a currently developed closed experimental loop. (C) 2017 Elsevier Inc. All rights reserved.

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How to cite

APA:

Cadogan, S., Hahn, C.J., Rausch, M.H., & Fröba, A.P. (2017). Study on the applicability of dynamic light scattering (DLS) to microemulsions including supercritical carbon dioxide-swollen micelles. Journal of Colloid and Interface Science, 499, 202-208. https://doi.org/10.1016/j.jcis.2017.03.111

MLA:

Cadogan, Shane, et al. "Study on the applicability of dynamic light scattering (DLS) to microemulsions including supercritical carbon dioxide-swollen micelles." Journal of Colloid and Interface Science 499 (2017): 202-208.

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