Extensibility governs the flow-induced alignment of polymers and rod-like colloids
Vincenzo Calabrese, Tatiana Porto Santos, Carlos G. Lopez, M. P. Lettinga, Simon J. Haward, Amy Q. Shen
Abstract
Polymers and rod-like colloids (PaRC) adopt a favorable orientation under sufficiently strong flows. However, how the flow kinematics affect the alignment of such nanostructures according to their extensibility remains unclear. By analyzing the shear- and extension-induced alignment of chemically and structurally different PaRC, we show that extensibility is a key determinant of the structural response to the imposed kinematics. We propose a unified description of the effectiveness of extensional flow, compared to shearing flow, at aligning PaRC of different extensibility. Published by the American Physical Society 2024
Topics & Concepts
ExtensibilityPolymerFlow (mathematics)ColloidMaterials sciencePolymer scienceComputer scienceMechanicsComposite materialChemical engineeringPhysicsProgramming languageEngineeringRheology and Fluid Dynamics StudiesPickering emulsions and particle stabilizationSurfactants and Colloidal Systems