Rheological worm-like micelles

In this chapter, a brief theoretical background on the rheological behavior of viscoelashc worm-like micelles is given. It is followed by a discussion on the temperature-induced viscosity growth in a water-surfactant binary system of a nonionic fluorinated surfactant at various concentrations. Finally, some recent results on the formation of viscoelastic worm-like micelles in mixed nonionic fluorinated surfactants in an aqueous system are presented. 

In the present study, we have performed rheological measurements on the C16E7/D2O system in addition to static and dynamic light scattering. Combining these results with the relaxation time obtained from the slow mode of dynamic light scattering [16-18] and the surfactant self-diHusion coefficient [21-23] reported previously, dynamics of worm-like micelles is discussed in more detail than in our previous study. 

Worm-Like Micelles in Diluted Mixed Surfactant Solutions Formation and Rheological Behavior... 

In this chapter, we present a review of the contribuhon of Kunieda s group regarding to worm-like micelles formation, the stmcture and rheological behavior of the miceUar solution, through the use of published and unpublished material of his group. 

Worm-Like Micelles Formation and Rheological Behavior 241... 

To conclude, in this work we present a review and explanation of the main contributions of Professor Kunieda in the field of rheology of worm-like micelles. It can be remarked that his works have extended the number and types of surfactant systems able to present worm-like micelles, on the one hand, and have deepened the elucidation of structure and formation mechanism, on the other hand. 

He showed the formation of viscoelastic worm-like micelles in various nonionic and ionic surfactant systems and described the evolution of micellar growth namely by rheology and small-angle X ray scattering [110, 112, 118, 133, 137, 144—155], Zero-shear viscosities 3 x 10 times that of water was reported for certain systems [118],... 

Rheological investigations of fairly concentrated solutions of 12-2-12, 2Br" thread-like micelles yielded values of the time for the break-up of a worm-like micelle into to daughter micelles in the range 0.1-10 s [9]. 

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