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| Home > Publications database > Probing microstructural origin of complex flow behaviour |
| Talk (non-conference) (Invited) | FZJ-2017-00374 |
2016
Abstract: Soft matter materials are classically characterized by rheological experiments, which probe the mechanical response to shear flow. Knowledge of the microscopic structure in flow is crucial to understand, predict, and tune flow behaviour and therefore the macroscopic rheological response of complex fluids. A simple example of such fluids are dispersions of stiff particles, as alignment of the particles will cause a huge drop in the viscosity of the fluid. This ‘shear thinning’ can cause flow to be unstable, but it is yet unclear how this highly non-linear behaviour is linked to microscopic features such as the stiffness and dimensions of the particles. In this talk I will present in situ time-resolved scattering [1-4] and microscopy experiments [5] on a variety of supramolecular polymers such as wormlike micelles, grafted-DNA, F-actin, and rod-like viruses. I will show how this (3-D) structural information indeed discloses new mechanisms underlying non-linear macroscopic responses as well as the need of improvements in theory.
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