Summary
Both linear and non-linear viscoelasticity experiments have been performed in semi-dilute micellar aqueous solutions of ethanediyl-α,ω-bis (dodecylmethylammonium bromide) as a function of solution chloride (NaCl) concentration. The results suggest that both linear and non-linear properties are affected by the electrostatic interactions. In particular, the plateau modulus G′∞ and the ratio σm/G′∞, where σm represents the plateau value in a stress-shear rate experiment, are enhanced as the electrostatic interactions are screened by addition of salt. The zero-shear viscosity is lowered upon addition of NaCl, due likely to an exchange of the Cl− ions with the Br− counterions.
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Candau, S.J., Hebraud, P., Schmitt, V. et al. Rheological behaviour of worm-like micelles: Effect of electrostatic interactions. Nouv Cim D 16, 1401–1410 (1994). https://doi.org/10.1007/BF02462024
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DOI: https://doi.org/10.1007/BF02462024