NDLI: Structure and oil responsiveness of viscoelastic fluids based on mixed anionic/cationic wormlike surfactant micelles

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Structure and oil responsiveness of viscoelastic fluids based on mixed anionic/cationic wormlike surfactant micelles

Content Provider	Scilit
Author	Shibaev, A. V. Makarov, A. V. Aleshina, A. L. Rogachev, A. V. Kuklin, A. I. Philippova, Olga
Copyright Year	2017
Description	Journal: Journal of Physics: Conference Series We report the results of small-angle neutron scattering (SANS) study of the effect of neutral water-soluble polymer poly(vinyl alcohol) on the structure of salt-free aqueous solutions of charged cylindrical micelles formed by the mixture of anionic (potassium oleate) and cationic (n-octyltrimethylammonium bromide $(C_{8}$TAB)) surfactants at a fixed molar ratio $[C_{8}$TAB]/[potassium oleate] = 0.46. The dependences of the scattering on surfactant concentration were examined both in the presence and in the absence of polymer. It was observed that at high q range, the scattering function is independent of surfactant concentration and added polymer indicating that the local cylindrical structure of the micelles remains unchanged. At intermediate q range, with growing surfactant concentration the scattering function becomes increasingly dominated by a structure peak that reveals enhanced interactions between neighboring micelles. The peak position q* scales with the surfactant concentration $C_{surf}$ as $C_{surf} ^{0.6}$ and $C_{surf} ^{0.53}$ in the absence and in the presence of polymer, respectively. The most important observation concerns the fact that added polymer decreases significantly the average intermicellar distance, which may be due to microsegregation of polymer and surfactant components typical for microphase separation.
Related Links	http://iopscience.iop.org/article/10.1088/1742-6596/848/1/012006/pdf
ISSN	17426588
e-ISSN	17426596
DOI	10.1088/1742-6596/848/1/012006
Journal	Journal of Physics: Conference Series
Volume Number	848
Language	English
Publisher	IOP Publishing
Publisher Date	2017-05-01
Access Restriction	Open
Subject Keyword	Journal: Journal of Physics: Conference Series Atomic, Molecular and Chemical Physics Anionic/cationic Wormlike Oil Responsiveness Mixed Anionic/cationic Surfactant Micelles Wormlike Surfactant Light Scattering
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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