Small-angle neutron scattering study of shearing effects on drag-reducing surfactant solutions

Yunying Qi; Kenneth Littrell; Pappannan Thiyagarajan; Yeshayahu Talmon; Judith Schmidt; Zhiqing Lin; Jacques L. Zakin

doi:10.1016/j.jcis.2009.05.020

Small-angle neutron scattering study of shearing effects on drag-reducing surfactant solutions

Yunying Qi, Kenneth Littrell, Pappannan Thiyagarajan, Yeshayahu Talmon, Judith Schmidt, Zhiqing Lin, Jacques L. Zakin

Instrument Development Group

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Drag-reducing surfactant solutions are very sensitive to shear. Shear can induce nanostructural transitions which affect drag reduction effectiveness and rheological properties. Literature reports on the effects of shear on different micellar solutions are inconsistent. In this paper, the effects of shear on three cationic drag-reducing surfactant solutions each with very different nanostructures and rheological behaviors, Arquad 16-50/sodium salicylate (NaSal) (5 mM/5 mM) (has thread-like micelles, shear-induced structure and large first normal stress (N₁)), Arquad S-50/NaSal (5 mM/12.5 mM) (has branched micelles, no shear-induced structure and first normal stress is about zero) and Arquad 16-50/sodium 3,4-dimethyl-benzoate (5 mM/5 mM) (has vesicles and thread-like micelles, shear-induced structure and high first normal stress (N₁)) are studied by small-angle neutron scattering (SANS), together with their rheological properties, drag reduction behavior and nanostructures by cryogenic-temperature transmission electron microscopy(cryo-TEM). The differences in the rheological behavior and the SANS data of the solutions are explained by the different responses of the nanostructures to shear based on a two-step response to shear.

Original language	English
Pages (from-to)	218-226
Number of pages	9
Journal	Journal of Colloid and Interface Science
Volume	337
Issue number	1
DOIs	https://doi.org/10.1016/j.jcis.2009.05.020
State	Published - Sep 1 2009

Funding

Y. Qi appreciates the support of a University Fellowship and a Presidential Fellowship from The Ohio State University. This work benefitted from the use of IPNS, supported by DOE-BES under Contract #DEFG0296ER45612 to the University of Chicago. The authors wish to thank Mr. Denis Wozniak in IPNS of Argonne National Laboratory for his kind help in the small-angle neutron scattering experiments. The cryo-TEM work was performed at the Hannah and George Krumholz Advanced Microscopy Laboratory, part of the Technion Project on Complex Fluids, Microstructure and Macromolecules. The Technion group’s research was supported in part by The Fund for Promotion of Research at the Technion.

Keywords

Drag reduction
Rheology
SANS (small-angel neutron scattering)
Surfactant

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10.1016/j.jcis.2009.05.020

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title = "Small-angle neutron scattering study of shearing effects on drag-reducing surfactant solutions",

abstract = "Drag-reducing surfactant solutions are very sensitive to shear. Shear can induce nanostructural transitions which affect drag reduction effectiveness and rheological properties. Literature reports on the effects of shear on different micellar solutions are inconsistent. In this paper, the effects of shear on three cationic drag-reducing surfactant solutions each with very different nanostructures and rheological behaviors, Arquad 16-50/sodium salicylate (NaSal) (5 mM/5 mM) (has thread-like micelles, shear-induced structure and large first normal stress (N1)), Arquad S-50/NaSal (5 mM/12.5 mM) (has branched micelles, no shear-induced structure and first normal stress is about zero) and Arquad 16-50/sodium 3,4-dimethyl-benzoate (5 mM/5 mM) (has vesicles and thread-like micelles, shear-induced structure and high first normal stress (N1)) are studied by small-angle neutron scattering (SANS), together with their rheological properties, drag reduction behavior and nanostructures by cryogenic-temperature transmission electron microscopy(cryo-TEM). The differences in the rheological behavior and the SANS data of the solutions are explained by the different responses of the nanostructures to shear based on a two-step response to shear.",

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Small-angle neutron scattering study of shearing effects on drag-reducing surfactant solutions

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