Conference Presentation (After Call)

FZJ-2017-04735

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Stiffness and Geometry Influences on the Shear Flow Behavior of Colloidal Rods

Lang, C. (Corresponding author)FZJ* ; Lettinga, M. P.FZJ* ; Kohlbrecher, J. ; Porcar, L.

2017

Abstract: The flow of rodlike particle suspensions is of broad practical interest as they are highly susceptible to shear flow. Geometry and stiffness of rods, thereby, play a key role in the microscopic behavior which leads to the macroscopic rheological response. We present a combination of Rheology and Small Angle Neutron Scattering (Rheo-SANS) to resolve the orientational ordering of rodlike viruses under steady shear flow in the 2 relevant planes, the flow-gradient and the flow-vorticity plane. The full orientational order tensor can be resolved in this way, as has been shown earlier [Lang2016]. By bio-engineering viruses with different geometries and stiffnesses, we are able to study the influence of those parameters on the shear thinning behavior of dilute to semi-dilute rodlike colloidal suspensions without polydispersity issues.[Lang2016] C. Lang, J. Kohlbrecher, L. Porcar, M. P. Lettinga; Polymers 8 (2016); 291

Keyword(s): Soft Condensed Matter (2nd)

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Contributing Institute(s):

1. Weiche Materie (ICS-3)

Research Program(s):

1. 551 - Functional Macromolecules and Complexes (POF3-551) (POF3-551)
2. DiStruc - Directed Colloidal Structure at the Meso-Scale (641839) (641839)

Experiment(s):

1. SANS-1: Small angle neutron scattering (NL4a)

Appears in the scientific report 2017

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