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Title: Strain heterogeneity in sheared colloids revealed by neutron scattering

Abstract

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:
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; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1422537
Alternate Identifier(s):
OSTI ID: 1479794
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Chemistry Chemical Physics. PCCP (Print)
Additional Journal Information:
Journal Volume: 20; Journal Issue: 9; Journal ID: ISSN 1463-9076
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

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., 2018. 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. Wed . "Strain heterogeneity in sheared colloids revealed by neutron scattering". United States. doi:10.1039/C7CP07197C. https://www.osti.gov/servlets/purl/1422537.
@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)},
issn = {1463-9076},
number = 9,
volume = 20,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Fig. 1 Fig. 1 : Rheological behavior of the charged colloidal suspension studied in this report. (a) Frequency dependence of the storage and loss moduli G′ (blue symbols) and G″ (red synbols). (b) Shear stress (blue symbols) and viscosity (black symbols) as a function of shear rate.

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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

    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.