Journal Article

Medium amplitude parallel superposition (MAPS) rheology of a wormlike micellar solution

McKinley, Gareth H., Swan, James W., Lennon, Kyle R.

2021

Overview

The weakly nonlinear rheology of a surfactant solution of wormlike micelles is investigated from both a modeling and experimental perspective using the framework of medium amplitude parallel superposition (MAPS) rheology. MAPS rheology defines material functions, such as the third-order complex compliance, which span the entire weakly nonlinear response space of viscoelastic materials to simple shear deformations. Three-tone oscillatory shear deformations are applied to obtain feature-rich data characterizing the third-order complex compliance with high data throughput. Here, data for a CPyCl solution are compared to the analytical solution for the MAPS response of a reptation-reaction constitutive model, which treats micelles as linear polymers that can break apart and recombine in solution. Regression of the data to the model predictions provides new insight into how these breakage and recombination processes are affected by shear, and demonstrates the importance of using information-rich data to infer precise estimates of model parameters. Graphical abstract

• Publisher: Springer Berlin Heidelberg,Springer Nature B.V,Springer
• Subject: Amplitudes / Chain entanglement / Characterization and Evaluation of Materials / Chemistry and Materials Science / Complex Fluids and Microfluidics / Constitutive models / Deformation / Exact solutions / Food Science / Materials Science / Mathematical models / Mechanical Engineering / Mechanics / Micelles / Nonlinear response / Original Contribution / Polymer Sciences / Reptation / Rheological properties / Rheology / Shear / Soft and Granular Matter / Viscoelastic materials