Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Strong Viscosity Increase in Aqueous Solutions of Cationic C22-Tailed Surfactant Wormlike Micelles

Version 1 : Received: 12 December 2021 / Approved: 13 December 2021 / Online: 13 December 2021 (13:23:52 CET)

A peer-reviewed article of this Preprint also exists.

Molchanov, V.S.; Rostovtsev, A.V.; Shishkhanova, K.B.; Kuklin, A.I.; Philippova, O.E. Strong Viscosity Increase in Aqueous Solutions of Cationic C22-Tailed Surfactant Wormlike Micelles. Fluids 2022, 7, 8. Molchanov, V.S.; Rostovtsev, A.V.; Shishkhanova, K.B.; Kuklin, A.I.; Philippova, O.E. Strong Viscosity Increase in Aqueous Solutions of Cationic C22-Tailed Surfactant Wormlike Micelles. Fluids 2022, 7, 8.

Journal reference: Fluids 2021, 7, 8
DOI: 10.3390/fluids7010008

Abstract

The viscoelastic properties and structure parameters have been investigated for aqueous solutions of wormlike micelles of cationic surfactant erucyl bis(hydroxyethyl) methylammonium chloride with long C22 tail in the presence inorganic salt KCl. The salt content has been varied to estimate linear to branched transition conditions due to screening of the electrostatic interaction in the networks. The local cylindrical structure and low electrostatic repulsion was obtained by SANS data. The drastic power law dependencies of rheological properties on surfactant concentrations were obtained at intermediate salt content. Two power law regions were detected in semi-dilute solutions related to “unbreakable” and “living” micellar chains. The fast contour length growth with surfactant concentration was demonstrated that is in good agreement with theoretical predictions.

Keywords

rheology; wormlike micelles; viscosity; EHAC; contour length; SANS

Subject

CHEMISTRY, Physical Chemistry

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