Transient Rheology of Wormlike Micelles
Langmuir1997Vol. 13(8), pp. 2227–2234
Citations Over TimeTop 10% of 1997 papers
Abstract
We report on the nonlinear shear rheology of wormlike micelles made of cetylpyridinium chloride (CP+,Cl-) and sodium salicylate (Na+,Sal-) diluted in 0.5 M NaCl-brine. A unique solution at concentration φ = 12% has been investigated (T = 20.3 °C). This strongly viscoelastic surfactant solution is an almost perfect Maxwellian fluid in the low-frequency range (ω γ̇I/N, the system undergoes the transition toward a strongly inhomogeneous flow, which can be ascribed to the isotropic/nematic shear-induced transition. The present findings suggest finally that, in wormlike micellar solution, the purely mechanical instability does exist but is preempted by the transition toward an (nematic) inhomogeneous flow.
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