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. 2014 Jul 14;9(7):e102539.
doi: 10.1371/journal.pone.0102539. eCollection 2014.

Formation of worm-like micelles in mixed N-hexadecyl-N-methylpyrrolidinium bromide-based cationic surfactant and anionic surfactant systems

Caili Dai  1 , Zhihu Yan  1 , Qing You  2 , Mingyong Du  1 , Mingwei Zhao  1
Affiliations

Formation of worm-like micelles in mixed N-hexadecyl-N-methylpyrrolidinium bromide-based cationic surfactant and anionic surfactant systems

Caili Dai et al. PLoS One. .

Abstract

Through the descriptive and rheological characterization of worm-like micelles formed by N-hexadecyl-N-methylpyrrolidinium bromide and sodium laurate, the formation and properties of the worm-like micelles were affected by the concentrations of sodium laurate and temperature. Additionally, cryogenic transmission electron microscopy images further validated the formation of worm-like micelles.

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Conflict of interest statement

Competing Interests: The authors have declared that no competing interests exist.

Figures

Figure 1
Figure 1. Chemical structure of C16MPBr (a) and Sodium Laurate (b).
Figure 2
Figure 2. Steady rheology plots.
(a) The shear viscosity for 70 mM C16MPBr with different SL concentrations at T = 25°C; (b) Variations of zero-shear viscosity (formula image) as a function of different SL concentrations for the 70 mM C16MPBr. The error bars represent standard deviations.
Figure 3
Figure 3. Shear stress with different concentration of SL at a fixed C16MPBr concentration of 70 Mm.
Figure 4
Figure 4. Dynamic oscillatory plots.
(a) Variations of G′ and G″ as a function of frequency (ω) in aqueous 70 mM C16MPBr/30 mM SL solution; (b) Cole-Cole plots (solid lines indicate the best fitting of Maxwell model).
Figure 5
Figure 5. Shear-rate dependence of the steady-shear viscosity and frequency dependence of the complex viscosity for 70 mM C16MPBr/30 mM SL solution.
Figure 6
Figure 6. Temperature effect plots.
(a) An Arrhenius plot of lnτ R as a function of 1/T for the 70 mM C16MPBr/30 mM SL solution; (b) the plot of ln (G″min/G0) as a function of 1/T. The error bars represent standard deviations.
Figure 7
Figure 7. Cryo-TEM images.
(a) 70 mM C16MPBr/30 mM SL solution; (b) 70 mM C16MPBr/35 mM SL solution.
See this image and copyright information in PMC

References

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