Inhomogeneous structure formation and shear-thickening in worm-like micellar solutions

Boltenhagen, Philippe; Hu, Yuntao; Matthys, E. F.; Pine, David J.

doi:10.1209/epl/i1997-00256-8

Cited by 75 publications

(105 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For controlled shear rate, the measured flow curve is predicted to be discontinuous. These results agree qualitatively with the experiments of Pine on shear thickening micelles [77].…”

Section: Other Related Modelssupporting

confidence: 91%

“…In some cases the viscosity increase is modest (a factor between two and ten) and the state relaxes quite rapidly to the previous one when shearing ceases [74]. In other cases, the new phase is a long-lived gel; shear banding is often implicated in the formation of such a gel [77]. The thickened phase contains micelles that are nearly fully aligned (the optical extinction angle is close to zero); its formation involves a nontrivial latency time which in some cases is geometry-dependent [12].…”

Section: Shear Thickeningmentioning

confidence: 99%

See 1 more Smart Citation

Rheology of giant micelles

Cates

Fielding

2006

Advances in Physics

322

341

View full text Add to dashboard Cite

Giant micelles are elongated, polymer-like objects created by the self-assembly of amphiphilic molecules (such as detergents) in solution. Giant micelles are typically flexible, and can become highly entangled even at modest concentrations. The resulting viscoelastic solutions show fascinating flow behaviour (rheology) which we address theoretically in this article at two levels. First, we summarise advances in understanding linear viscoelastic spectra and steady-state nonlinear flows, based on microscopic constitutive models that combine the physics of polymer entanglement with the reversible kinetics of self-assembly. Such models were first introduced two decades ago, and since then have been shown to explain robustly several distinctive features of the rheology in the strongly entangled regime, including extreme shear-thinning. We then turn to more complex rheological phenomena, particularly involving spatial heterogeneity, spontaneous oscillation, instability, and chaos. Recent understanding of these complex flows is based largely on grossly simplified models which capture in outline just a few pertinent microscopic features, such as coupling between stresses and other order parameters such as concentration. The role of 'structural memory' (the dependence of structural parameters such as the micellar length distribution on the flow history) in explaining these highly nonlinear phenomena is addressed. Structural memory also plays an intriguing role in the little-understood shear-thickening regime, which occurs in a concentration regime close to but below the onset of strong entanglement, and which is marked by a shear-induced transformation from an inviscid to a gelatinous state.

show abstract

“…For controlled shear rate, the measured flow curve is predicted to be discontinuous. These results agree qualitatively with the experiments of Pine on shear thickening micelles [77].…”

Section: Other Related Modelssupporting

confidence: 91%

Section: Shear Thickeningmentioning

confidence: 99%

Rheology of giant micelles

Cates

Fielding

2006

Advances in Physics

322

341

View full text Add to dashboard Cite

show abstract

“…This wormlike micelle solution in the dilute regime is known to display a shear-thickening behaviour at typical shear ratesγ = 1-10 s −1 [3]. Such shear-thickening has also been observed in a wide range of other wormlike micelle solutions and appears as a common feature of dilute systems [12][13][14]. In order to characterise our low-viscosity micellar system, rheological measurements are performed in a double Couette geometry (rotor radii 28 and 34 mm, stator radii 29.5 and 32 mm) thermostated at T = 20…”

mentioning

confidence: 66%

“…We conclude that the same shear-thickening phenomenon is at play under pure shear flow and in the surface wave pattern induced by the Faraday instability. As in previous work under shear [12], we tried to evidence turbid regions characteristic of a gel-like structure using light scattering. However such experiments did not reveal any significant increase of the turbidity neither locally nor globally.…”

Section: P-5mentioning

confidence: 99%

Shear-thickening induced by Faraday waves in dilute wormlike micelles

Ballesta¹,

Manneville²

2006

Europhys. Lett.

View full text Add to dashboard Cite

Abstract. -We investigate the effect of surface waves generated by the Faraday instability on a shear-thickening surfactant solution under vertical vibrations. We show that a prolonged oscillation of the surface above the instability onset leads to an increase of the fluid viscosity. This phenomenon is evidenced by comparing the time needed for the instability to develop in the fluid at rest and once the fluid has been shaken above onset: pre-shaking may delay the instability by two orders of magnitude. A simple model based on a time-dependent viscosity is proposed which accounts quantitatively for the experimental observations.

show abstract

“…This stage consists of two sections: the weak shearthinning and the first plateau in the viscosity evolution curve, which is the so-called induction period [10,22,23]. Figure 2 (the insert graphs show the corresponding entire curves).…”

Section: Resultsmentioning

confidence: 99%

Time-Dependent Shear-Induced Nonlinear Viscosity Effects in Dilute CTAC/NaSal Solutions: Mechanism Analyses

Wei

2014

Advances in Mechanical Engineering

View full text Add to dashboard Cite

The time-dependent shear-induced nonlinear viscosity effects of dilute surfactant solutions (CTAC/NaSal) at constant shear rate were tested by using the rheometer Couette cell. The apparent viscosity evolution curve can be divided into five stages: weak shearthickening (Stage I), weak shear-thinning and plateau (Stage II), sharp shear-thickening (Stage III), oscillating adjustment (Stage IV), and rough plateau (Stage V). In Stage I, the stretching effects of shear flow lead to the weak increase in apparent viscosity at the inception of shearing. The apparent viscosity curve firstly decreases in Stage II and then levels off. The apparent viscosity plateau is caused by the forming and slipping of micellar lumps at the inner cylinder wall surface. Once the volume of lump exceeds a certain degree, the nucleation process of forming SIS is triggered, which is the beginning of Stage III and then the apparent viscosity increases sharply. The variations of apparent viscosity in adjusting period are rather complicated in Stage IV, and the variations mainly depend on the situation of SISs network. In Stage V, coupled with obvious oscillations, the apparent viscosity maintains a basically constant plateau value, indicating that the SISs network is fully developed and saturated at the corresponding shear rate.

show abstract

Inhomogeneous structure formation and shear-thickening in worm-like micellar solutions

Cited by 75 publications

References 19 publications

Rheology of giant micelles

Rheology of giant micelles

Shear-thickening induced by Faraday waves in dilute wormlike micelles

Time-Dependent Shear-Induced Nonlinear Viscosity Effects in Dilute CTAC/NaSal Solutions: Mechanism Analyses

Contact Info

Product

Resources

About