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@ARTICLE{Lang:819526,
author = {Lang, Christian and Kohlbrecher, Joachim and Porcar, Lionel
and Lettinga, M.P.},
title = {{T}he {C}onnection between {B}iaxial {O}rientation and
{S}hear {T}hinning for {Q}uasi-{I}deal {R}ods},
journal = {Polymers},
volume = {8},
number = {8},
issn = {2073-4360},
address = {Basel},
publisher = {MDPI},
reportid = {FZJ-2016-05169},
pages = {291},
year = {2016},
abstract = {The complete orientational ordering tensor of quasi-ideal
colloidal rods is obtainedas a function of shear rate by
performing rheo-SANS (rheology with small angle
neutronscattering) measurements on isotropic fd-virus
suspensions in the two relevant scatteringplanes, the
flow-gradient (1-2) and the flow-vorticity (1-3) plane.
Microscopic ordering canbe identified as the origin of the
observed shear thinning. A qualitative description of
therheological response by Smoluchowski, as well as
Doi–Edwards–Kuzuu theory is possible,as we obtain a
master curve for different concentrations, scaling the shear
rate with theapparent collective rotational diffusion
coefficient. However, the observation suggests that
theinterdependence of ordering and shear thinning at small
shear rates is stronger than predicted.The extracted
zero-shear viscosity matches the concentration dependence of
the self-diffusion ofrods in semi-dilute solutions, while
the director tilts close towards the flow direction already
atvery low shear rates. In contrast, we observe a smaller
dependence on the shear rate in the overallordering at high
shear rates, as well as an ever-increasing biaxiality.},
cin = {ICS-3},
ddc = {540},
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)16},
UT = {WOS:000384520900007},
doi = {10.3390/polym8080291},
url = {https://juser.fz-juelich.de/record/819526},
}