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@INPROCEEDINGS{Lang:824635,
author = {Lang, Christian and Lettinga, M. P.},
title = {{T}he {C}onnection between {B}iaxial {O}rientation and
{S}hear {T}hinning for quasi ideal {R}ods},
reportid = {FZJ-2016-07198},
year = {2016},
abstract = {We use rheo-SANS measurements to determine the response of
isotropic fd-virus suspensions to steady state shear flow.
The complete orientational order parameter tensor is
obtained as a function of shear rate by resolving the
orientational ordering of the quasi-ideal rods in the two
relevant scattering planes, the flow-gradient and the
flow-vorticity plane.Microscopic ordering can be identified
as the origin of the observed shear thinning. We obtain a
master curve for different concentrations taking into
account the appearent collective rotational diffusion
coefficient. However, we need to do a scaling of the zero
shear viscosity which matches the concentration dependence
of self-diffusion of the rods. Using the Doi-Edwards-Kuzuu
theory, a qualitative description of the rheological
response is possible but the observation suggests that the
contribution of shear induced energy to the positional
entropy is larger than predicted. Moreover, we observe signs
of biaxiality due to the combination of shear geometries.},
month = {Sep},
date = {2016-09-12},
organization = {International Soft Matter Conference,
Grenoble (France), 12 Sep 2016 - 16 Sep
2016},
subtyp = {After Call},
cin = {ICS-3},
cid = {I:(DE-Juel1)ICS-3-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551) /
DiStruc - Directed Colloidal Structure at the Meso-Scale
(641839)},
pid = {G:(DE-HGF)POF3-551 / G:(EU-Grant)641839},
typ = {PUB:(DE-HGF)24},
url = {https://juser.fz-juelich.de/record/824635},
}