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Title: Strain heterogeneity in sheared colloids revealed by neutron scattering

Recent computational and theoretical studies have shown that the deformation of colloidal suspensions under a steady shear is highly heterogeneous at the particle level and demonstrate a critical influence on the macroscopic deformation behavior. Despite its relevance to a wide variety of industrial applications of colloidal suspensions, scattering studies focusing on addressing the heterogeneity of the non-equilibrium colloidal structure are scarce thus far. Here in this paper, we report the first experimental result using small-angle neutron scattering. From the evolution of strain heterogeneity, we conclude that the shear-induced deformation transforms from nearly affine behavior at low shear rates, to plastic rearrangements when the shear rate is high.
Authors:
 [1] ;  [2] ; ORCiD logo [2] ; ORCiD logo [2] ; ORCiD logo [2] ;  [3] ;  [2] ; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
  3. National Centre for Theoretical Sciences, Hsinchu (China). Physics Division; Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Shull Wollan Centre
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Physical Chemistry Chemical Physics. PCCP (Print)
Additional Journal Information:
Journal Name: Physical Chemistry Chemical Physics. PCCP (Print); Journal Volume: 20; Journal Issue: 9; Journal ID: ISSN 1463-9076
Publisher:
Royal Society of Chemistry
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; Ministry of Science and Technology (MOST) in Taiwan
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1422537

Chen, Kevin, Wu, Bin, He, Lilin, Smith, Gregory S., Do, Changwoo, Huang, Guan-Rong, Zhang, Gaibo, and Wang, Yangyang. Strain heterogeneity in sheared colloids revealed by neutron scattering. United States: N. p., Web. doi:10.1039/C7CP07197C.
Chen, Kevin, Wu, Bin, He, Lilin, Smith, Gregory S., Do, Changwoo, Huang, Guan-Rong, Zhang, Gaibo, & Wang, Yangyang. Strain heterogeneity in sheared colloids revealed by neutron scattering. United States. doi:10.1039/C7CP07197C.
Chen, Kevin, Wu, Bin, He, Lilin, Smith, Gregory S., Do, Changwoo, Huang, Guan-Rong, Zhang, Gaibo, and Wang, Yangyang. 2018. "Strain heterogeneity in sheared colloids revealed by neutron scattering". United States. doi:10.1039/C7CP07197C.
@article{osti_1422537,
title = {Strain heterogeneity in sheared colloids revealed by neutron scattering},
author = {Chen, Kevin and Wu, Bin and He, Lilin and Smith, Gregory S. and Do, Changwoo and Huang, Guan-Rong and Zhang, Gaibo and Wang, Yangyang},
abstractNote = {Recent computational and theoretical studies have shown that the deformation of colloidal suspensions under a steady shear is highly heterogeneous at the particle level and demonstrate a critical influence on the macroscopic deformation behavior. Despite its relevance to a wide variety of industrial applications of colloidal suspensions, scattering studies focusing on addressing the heterogeneity of the non-equilibrium colloidal structure are scarce thus far. Here in this paper, we report the first experimental result using small-angle neutron scattering. From the evolution of strain heterogeneity, we conclude that the shear-induced deformation transforms from nearly affine behavior at low shear rates, to plastic rearrangements when the shear rate is high.},
doi = {10.1039/C7CP07197C},
journal = {Physical Chemistry Chemical Physics. PCCP (Print)},
number = 9,
volume = 20,
place = {United States},
year = {2018},
month = {2}
}

Works referenced in this record:

Rheo–small-angle neutron scattering at the National Institute of Standards and Technology Center for Neutron Research
journal, August 2011
  • Porcar, L.; Pozzo, D.; Langenbucher, G.
  • Review of Scientific Instruments, Vol. 82, Issue 8, Article No. 083902
  • DOI: 10.1063/1.3609863