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@INPROCEEDINGS{Lang:834848,
author = {Lang, Christian and Lettinga, M.P. and Kohlbrecher, Joachim
and Porcar, Lionel},
title = {{M}orphological {I}nfluences on the {S}hear {F}low
{B}ehavior of {C}olloidal {R}ods},
school = {KU Leuven},
reportid = {FZJ-2017-04736},
year = {2017},
abstract = {High-aspect-ratio colloidal particles are becoming
increasingly more important components in a wide range of
technologies and products. In biology, they constitute the
frame of the cytoskeleton in form of F-actin and micro
tubular networks and amyloids are responsible for a large
number of diseases such as Alzheimer disease.The mechanical
properties of complex fluids containing such rod-like
colloids are hugely affected by flow via the particle
orientation. The morphology of rods, thereby, plays 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 [1]. By bio-engineering viruses with
different morphologies, we are able to study the influence
of geometry and stiffness on the shear thinning behavior of
dilute to semi-dilute rodlike colloidal suspensions without
polydispersity issues.From Fig.1, it is seen that that
length and stiffness have an enormous effect on the
orientational ordering. The viscosity of the fd-Y21M virus
(Lc=910 nm, Lp=9.9 μm) decreases less with shear rate than
that of pf1 (Lc=1.96 μm, Lp=2.2 μm) because the order
increase is considerably less.[1] C. Lang, J. Kohlbrecher,
L. Porcar, M. P. Lettinga; Polymers 8 (2016); 291},
month = {Mar},
date = {2017-03-13},
organization = {DRG-/ProcessNet-Tagung, Berlin
(Germany), 13 Mar 2017 - 14 Mar 2017},
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},
experiment = {EXP:(DE-MLZ)SANS-1-20140101},
typ = {PUB:(DE-HGF)6},
url = {https://juser.fz-juelich.de/record/834848},
}