Structural changes of a sodium dodecyl sulfate (SDS) micelle induced by alcohol molecules

Journal of Molecular Modeling
Jose G Méndez-Bermúdez, Hector Domínguez

Abstract

Coarse-grained dynamical simulations have been performed to investigate the behavior of a surfactant micelle in the presence of six different alcohols: hexanol, octanol, decanol, dodecanol, tetradecanol, and hexadecanol. The self-assembly of sodium dodecyl sulfate (SDS) is modified by the alcohol molecules into cylindrical and bilayer micelles as a function of the alcohol/SDS mass ratio. Therefore, in order to understand, from a molecular point of view, how SDS and alcohol molecules self-organize to form the new micelles, different studies were carried out. Analysis of micelle structures, density profiles, and parameters of order were conducted to characterize the shape and size of those micelles. The density profiles revealed that the alcohol molecules were located at the water-micelle interface next to the SDS molecules at low alcohol/SDS mass ratio. At high alcohol/SDS mass ratios, alcohol molecules moved to the middle of the micelle by increasing their size and by producing a structural change. Moreover, micelle structures and sizes were influenced not only by the alcohol/SDS mass ratio but also by the order of the SDS and alcohol tails. Finally, the size of the micelles and enthalpy calculations were used as order paramete...Continue Reading

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Citations

Mar 4, 2017·Physical Chemistry Chemical Physics : PCCP·Christian Totland, Anne Marit Blokhus
Mar 7, 2020·Scientific Reports·Delaram AhmadiM Jayne Lawrence
Apr 20, 2021·Physical Chemistry Chemical Physics : PCCP·Dengpan DongPaschalis Alexandridis
Sep 13, 2019·The Journal of Physical Chemistry. B·Regina K CiszewskiGeraldine L Richmond

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