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In relation to this article, we declare that there is no conflict of interest.
Publication history
Received December 29, 2008
Accepted March 20, 2009
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Mesoscopic simulation for the structural change of a surfactant solution using dissipative particle dynamics

Mechanical Engineering Department, Chung-Ang University, Seoul 156-756, Korea
Korean Journal of Chemical Engineering, November 2009, 26(6), 1717-1722(6), 10.1007/s11814-009-0235-2
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Abstract

With a simple model for a surfactant consisting of a hydrophilic head group and hydrophobic tail groups connected by harmonic springs, the structural change of the association structures of the surfactant in an aqueous solution was studied by using the dissipative particle dynamics (DPD) simulation. The effect of the interaction parameter of DPD particles on the structural change of the association structures was also studied. Simulations show that the proper relative values of these interaction parameters could yield desirable changes for the association structure depending on the concentration of the surfactant. That is, a spherical structure forms at φ=0.15, structural change from a spherical to cylindrical one occurs at φ =0.26, and a hexagonal structure appears at φ =0.30, where φ is the volume fraction of surfactant SDS (sodium dodecyl sulfate), and they are in good agreement with observation.

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