Hauptseite > Publikationsdatenbank > Morphological Influences on the Shear Flow Behavior of Colloidal Rods > print

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005     20240619083539.0
037 _ _ |a FZJ-2017-04736
041 _ _ |a English
100 1 _ |a Lang, Christian
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111 2 _ |a DRG-/ProcessNet-Tagung
|c Berlin
|d 2017-03-13 - 2017-03-14
|w Germany
245 _ _ |a Morphological Influences on the Shear Flow Behavior of Colloidal Rods
260 _ _ |c 2017
336 7 _ |a Conference Paper
|0 33
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336 7 _ |a Other
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336 7 _ |a INPROCEEDINGS
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336 7 _ |a Conference Presentation
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502 _ _ |c KU Leuven
520 _ _ |a 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
536 _ _ |a 551 - Functional Macromolecules and Complexes (POF3-551)
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536 _ _ |a DiStruc - Directed Colloidal Structure at the Meso-Scale (641839)
|0 G:(EU-Grant)641839
|c 641839
|f H2020-MSCA-ITN-2014
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693 _ _ |a Forschungs-Neutronenquelle Heinz Maier-Leibnitz
|e SANS-1: Small angle neutron scattering
|f NL4a
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700 1 _ |a Lettinga, M.P.
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700 1 _ |a Kohlbrecher, Joachim
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700 1 _ |a Porcar, Lionel
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909 C O |o oai:juser.fz-juelich.de:834848
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