Wormlike Micelles Formed by Sodium Erucate in the Presence of a Tetraalkylammonium Hydrotrope
- 5 May 2011
- journal article
- Published by American Chemical Society (ACS) in The Journal of Physical Chemistry B
- Vol. 115 (21), 6893-6902
- https://doi.org/10.1021/jp2004634
Abstract
Anionic wormlike micelles, particularly those formed by long-chain carboxylate surfactants, are relatively less documented though their cationic or zwitterionic counterparts are frequently reported. In this study, the wormlike micelles of sodium erucate (NaOEr), a C22-tailed anionic surfactant with a monounsaturated tail, in the presence of a tetraalkylammonium hydrotrope were investigated for the first time. The different effects of two hydrotropes, benzyl trimethyl ammonium bromide (BTAB) and tetramethyl ammonium bromide (TMAB), on the phase behavior and rheological behaviors were compared, and the influences of surfactant concentration and temperature on the rheological properties of NaOEr solutions were also examined. Both organic salts can lower the Krafft temperature of NaOEr solutions and thus improve its water solubility, but BTAB can make TK drop more sharply. At a fixed NaOEr concentration, less BTAB is demanded to induce the formation of viscoelastic solution and to obtain the maximum viscosity of NaOEr solution; at a constant salt concentration, with increasing NaOEr content, the NaOEr–BTAB system shows a larger zero-shear viscosity (η0), relaxation time, and plateau modulus but lower overlapping concentration than those of the NaOEr–TMAB system. The occurrence of maximum η0 with increasing salt content for the NaOEr–BTAB system results from the formation of vesicles and L3 phases, which were verified by cryo-TEM observations. η0 shows an exponential decrease with increasing temperature; nevertheless it still remains above 103 mPa·s even at 90 °C.Keywords
This publication has 59 references indexed in Scilit:
- Threadlike Micelle Formation of Anionic Surfactants in Aqueous SolutionLangmuir, 2006
- Phase Behavior of a DNA-Based Surfactant Mixed with Water and n-AlcoholsThe Journal of Physical Chemistry B, 2006
- Tetrabutylammonium Alkyl Carboxylate Surfactants in Aqueous Solution: Self-Association Behavior, Solution Nanostructure, and Comparison with Tetrabutylammonium Alkyl Sulfate SurfactantsLangmuir, 2005
- Some observations on the effect of the trivalent counterion Al3+ to the self-assembly of sodium dodecyl sulphate in waterColloids and Surfaces A: Physicochemical and Engineering Aspects, 2004
- Viscoelastic Properties of Sodium Dodecyl Sulfate with Aluminum Salt in Aqueous SolutionLangmuir, 2003
- Oil and gas productionCurrent Opinion in Colloid & Interface Science, 2000
- Growth of Cationic Micelles in the Presence of Organic AdditivesLangmuir, 2000
- Growth of Sodium Dodecyl Sulfate Micelles in Aqueous Ammonium SaltsLangmuir, 1997
- Fascinating phenomena in Surfactant ChemistryAdvanced Materials, 1994
- Viscoelastic micellar solutions: microscopy and rheologyThe Journal of Physical Chemistry, 1992