This title appears in the Scientific Report :
2019
Please use the identifier:
http://hdl.handle.net/2128/23816 in citations.
Please use the identifier: http://dx.doi.org/10.1021/acs.macromol.9b01592 in citations.
Microstructural Understanding of the Length- and Stiffness-Dependent Shear Thinning in Semidilute Colloidal Rods
Microstructural Understanding of the Length- and Stiffness-Dependent Shear Thinning in Semidilute Colloidal Rods
Complex fluids containing low concentrations of slender colloidal rods can display a high viscosity, while little flow is needed to thin the fluid. This feature makes slender rods essential constituents in industrial applications and biology. Though this behavior strongly depends on the rod-length,...
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Personal Name(s): | Lang, Christian (Corresponding author) |
---|---|
Kohlbrecher, Joachim / Porcar, Lionel / Radulescu, Aurel / Sellinghoff, Karin / Dhont, Jan Karel George / Lettinga, Minne Paul | |
Contributing Institute: |
Weiche Materie; ICS-3 Heinz Maier-Leibnitz Zentrum; MLZ Neutronenstreuung; JCNS-1 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Macromolecules, 52 (2019) 24, S. 9604 - 9612 |
Imprint: |
Washington, DC
Soc.
2019
|
DOI: |
10.1021/acs.macromol.9b01592 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) FRM II / MLZ Soft Matter, Health and Life Sciences |
Subject (ZB): | |
Link: |
Restricted Published on 2019-12-03. Available in OpenAccess from 2020-12-03. Restricted Published on 2019-12-03. Available in OpenAccess from 2020-12-03. |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1021/acs.macromol.9b01592 in citations.
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520 | |a Complex fluids containing low concentrations of slender colloidal rods can display a high viscosity, while little flow is needed to thin the fluid. This feature makes slender rods essential constituents in industrial applications and biology. Though this behavior strongly depends on the rod-length, so far no direct relation could be identified. We employ a library of filamentous viruses to study the effect of rod size and flexibility on the zero-shear viscosity and shear-thinning behavior. Rheology and small-angle neutron scattering data are compared to a revised version of the standard theory for ideally stiff rods, which incorporates a complete shear-induced dilation of the confinement. While the earlier predicted length-independent prefactor of the restricted rotational diffusion coefficient is confirmed by varying the length and concentration of the rods, the revised theory correctly predicts the shear-thinning behavior as well as the underlying orientational order. These results can be directly applied to understand the manifold systems based on rodlike colloids and design new materials. | ||
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