Time-resolved small-angle neutron scattering study of shear-thickening surfactant solutions after the cessation of flow

R. Oda, V. Weber, P. Lindner, D. J. Pine, E. Mendes, F. Schosseler

Research output: Contribution to journalArticle

Abstract

Shear effects in dilute solutions of gemini surfactant solutions are studied by SANS in the shear-thickening regime. After the cessation of flow, the local anisotropy relaxes in about 102 s and we find evidence for a shear-induced change in the structure of the solutions that is stable for at least a few hours. The results can be understood if the shear-induced viscous phase is a loosely connected network of long-lived aggregates with typical size of 1 μm. Counterions-mediated attraction between rodlike micelles could explain the formation of the aggregates and their long lifetime. The whole picture is consistent with previous results obtained for the same system using different techniques.

Original languageEnglish (US)
Pages (from-to)4859-4863
Number of pages5
JournalLangmuir
Volume16
Issue number11
DOIs
StatePublished - May 30 2000

Fingerprint

Neutron scattering
Surface-Active Agents
neutron scattering
Surface active agents
surfactants
shear
Micelles
Anisotropy
attraction
micelles
life (durability)
anisotropy

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

Time-resolved small-angle neutron scattering study of shear-thickening surfactant solutions after the cessation of flow. / Oda, R.; Weber, V.; Lindner, P.; Pine, D. J.; Mendes, E.; Schosseler, F.

In: Langmuir, Vol. 16, No. 11, 30.05.2000, p. 4859-4863.

Research output: Contribution to journalArticle

Oda, R. ; Weber, V. ; Lindner, P. ; Pine, D. J. ; Mendes, E. ; Schosseler, F. / Time-resolved small-angle neutron scattering study of shear-thickening surfactant solutions after the cessation of flow. In: Langmuir. 2000 ; Vol. 16, No. 11. pp. 4859-4863.
@article{9af39cb5b21b456c8c1fbb19477378e6,
title = "Time-resolved small-angle neutron scattering study of shear-thickening surfactant solutions after the cessation of flow",
abstract = "Shear effects in dilute solutions of gemini surfactant solutions are studied by SANS in the shear-thickening regime. After the cessation of flow, the local anisotropy relaxes in about 102 s and we find evidence for a shear-induced change in the structure of the solutions that is stable for at least a few hours. The results can be understood if the shear-induced viscous phase is a loosely connected network of long-lived aggregates with typical size of 1 μm. Counterions-mediated attraction between rodlike micelles could explain the formation of the aggregates and their long lifetime. The whole picture is consistent with previous results obtained for the same system using different techniques.",
author = "R. Oda and V. Weber and P. Lindner and Pine, {D. J.} and E. Mendes and F. Schosseler",
year = "2000",
month = "5",
day = "30",
doi = "10.1021/la9913811",
language = "English (US)",
volume = "16",
pages = "4859--4863",
journal = "Langmuir",
issn = "0743-7463",
publisher = "American Chemical Society",
number = "11",

}

TY - JOUR

T1 - Time-resolved small-angle neutron scattering study of shear-thickening surfactant solutions after the cessation of flow

AU - Oda, R.

AU - Weber, V.

AU - Lindner, P.

AU - Pine, D. J.

AU - Mendes, E.

AU - Schosseler, F.

PY - 2000/5/30

Y1 - 2000/5/30

N2 - Shear effects in dilute solutions of gemini surfactant solutions are studied by SANS in the shear-thickening regime. After the cessation of flow, the local anisotropy relaxes in about 102 s and we find evidence for a shear-induced change in the structure of the solutions that is stable for at least a few hours. The results can be understood if the shear-induced viscous phase is a loosely connected network of long-lived aggregates with typical size of 1 μm. Counterions-mediated attraction between rodlike micelles could explain the formation of the aggregates and their long lifetime. The whole picture is consistent with previous results obtained for the same system using different techniques.

AB - Shear effects in dilute solutions of gemini surfactant solutions are studied by SANS in the shear-thickening regime. After the cessation of flow, the local anisotropy relaxes in about 102 s and we find evidence for a shear-induced change in the structure of the solutions that is stable for at least a few hours. The results can be understood if the shear-induced viscous phase is a loosely connected network of long-lived aggregates with typical size of 1 μm. Counterions-mediated attraction between rodlike micelles could explain the formation of the aggregates and their long lifetime. The whole picture is consistent with previous results obtained for the same system using different techniques.

UR - http://www.scopus.com/inward/record.url?scp=0033741001&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033741001&partnerID=8YFLogxK

U2 - 10.1021/la9913811

DO - 10.1021/la9913811

M3 - Article

AN - SCOPUS:0033741001

VL - 16

SP - 4859

EP - 4863

JO - Langmuir

JF - Langmuir

SN - 0743-7463

IS - 11

ER -