Rheometry-PIV of shear-thickening wormlike micelles

Langmuir : the ACS Journal of Surfaces and Colloids
Benjamín M Marín-SantibañezGuadalupe Huelsz

Abstract

The shear-thickening behavior of an equimolar semidilute aqueous solution of 40 mM/L cetylpyridinium chloride and sodium salicylate was studied in this work by using a combined method of rheometry and particle image velocimetry (PIV). Experiments were conducted at 27.5 degrees C with Couette, vane-bob, and capillary rheometers in order to explore a wide shear stress range as well as the effect of boundary conditions and time of flow on the creation and destruction of shear-induced structures (SIS). The use of the combined method of capillary rheometry with PIV allowed the detection of fast spatial and temporal variations in the flow kinematics, which are related to the shear-thickening behavior and the dynamics of the SIS but are not distinguished by pure rheometrical measurements. A rich-in-details flow curve was found for this solution, which includes five different regimes. Namely, at very low shear rates a Newtonian behavior was found, followed by a shear thinning one in the second regime. In the third, shear banding was observed, which served as a precursor of the SIS and shear-thickening. The fourth and fifth regimes in the flow curve were separated by a spurtlike behavior, and they clearly evidenced the existence of shea...Continue Reading

References

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Citations

Jun 25, 2014·Advances in Colloid and Interface Science·Ya ZhaoAmy Q Shen
Jun 6, 2007·Journal of Colloid and Interface Science·J F A SolteroJ E Puig
Jul 12, 2017·Physical Review Fluids·Paul F SalipanteSteven D Hudson
Mar 20, 2008·Soft Matter·Allan Raudsepp, Paul T Callaghan
Feb 1, 2008·Physical Review Letters·Chloé MasselonAnnie Colin

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