Rheochaos and flow instability phenomena in a nonionic lamellar phase

Luigi Gentile; B. F. B. Silva; S. Lages; Kell Mortensen; J. Kohlbrecher; U. Olsson

doi:10.1039/c2sm27101j

Rheochaos and flow instability phenomena in a nonionic lamellar phase

Luigi Gentile, B. F. B. Silva, S. Lages, Kell Mortensen, J. Kohlbrecher, U. Olsson

X-ray and Neutron Science

20 Citationer (Scopus)

Abstract

In this study we report on instability phenomena in a solution where shear induces multilamellar vesicles (MLVs) from a lamellar phase. A shear-thickening regime has been observed for hexadecyl tetraethylene glycol ether (C ₁₆E₄) dissolved in D₂O at 40 °C. In this regime, unstable temporal viscosity behavior, i.e. periodic oscillations, has been observed at 2, 5 and 10 s^-1. Moreover at a shear rate of 10 s^-1 shear banding manifests itself as the occurrence of transparent and turbid bands stacked along the vorticity direction. We perform time-resolved-rheo-small angle neutron scattering (rheo-SANS) experiments to understand the nature of the viscosity oscillations and spatial-resolved experiments to obtain a structural characterization of vorticity bands.

Originalsprog	Engelsk
Tidsskrift	Soft Matter
Vol/bind	9
Udgave nummer	4
Sider (fra-til)	1133-1140
ISSN	1744-683X
DOI	https://doi.org/10.1039/c2sm27101j
Status	Udgivet - 28 jan. 2013

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10.1039/c2sm27101j

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title = "Rheochaos and flow instability phenomena in a nonionic lamellar phase",

abstract = "In this study we report on instability phenomena in a solution where shear induces multilamellar vesicles (MLVs) from a lamellar phase. A shear-thickening regime has been observed for hexadecyl tetraethylene glycol ether (C 16E4) dissolved in D2O at 40 °C. In this regime, unstable temporal viscosity behavior, i.e. periodic oscillations, has been observed at 2, 5 and 10 s-1. Moreover at a shear rate of 10 s-1 shear banding manifests itself as the occurrence of transparent and turbid bands stacked along the vorticity direction. We perform time-resolved-rheo-small angle neutron scattering (rheo-SANS) experiments to understand the nature of the viscosity oscillations and spatial-resolved experiments to obtain a structural characterization of vorticity bands.",

author = "Luigi Gentile and Silva, {B. F. B.} and S. Lages and Kell Mortensen and J. Kohlbrecher and U. Olsson",

year = "2013",

month = jan,

day = "28",

doi = "10.1039/c2sm27101j",

language = "English",

volume = "9",

pages = "1133--1140",

journal = "Journal of Materials Chemistry",

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publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Rheochaos and flow instability phenomena in a nonionic lamellar phase

AU - Gentile, Luigi

AU - Silva, B. F. B.

AU - Lages, S.

AU - Mortensen, Kell

AU - Kohlbrecher, J.

AU - Olsson, U.

PY - 2013/1/28

Y1 - 2013/1/28

N2 - In this study we report on instability phenomena in a solution where shear induces multilamellar vesicles (MLVs) from a lamellar phase. A shear-thickening regime has been observed for hexadecyl tetraethylene glycol ether (C 16E4) dissolved in D2O at 40 °C. In this regime, unstable temporal viscosity behavior, i.e. periodic oscillations, has been observed at 2, 5 and 10 s-1. Moreover at a shear rate of 10 s-1 shear banding manifests itself as the occurrence of transparent and turbid bands stacked along the vorticity direction. We perform time-resolved-rheo-small angle neutron scattering (rheo-SANS) experiments to understand the nature of the viscosity oscillations and spatial-resolved experiments to obtain a structural characterization of vorticity bands.

AB - In this study we report on instability phenomena in a solution where shear induces multilamellar vesicles (MLVs) from a lamellar phase. A shear-thickening regime has been observed for hexadecyl tetraethylene glycol ether (C 16E4) dissolved in D2O at 40 °C. In this regime, unstable temporal viscosity behavior, i.e. periodic oscillations, has been observed at 2, 5 and 10 s-1. Moreover at a shear rate of 10 s-1 shear banding manifests itself as the occurrence of transparent and turbid bands stacked along the vorticity direction. We perform time-resolved-rheo-small angle neutron scattering (rheo-SANS) experiments to understand the nature of the viscosity oscillations and spatial-resolved experiments to obtain a structural characterization of vorticity bands.

U2 - 10.1039/c2sm27101j

DO - 10.1039/c2sm27101j

M3 - Journal article

SN - 0959-9428

VL - 9

SP - 1133

EP - 1140

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

IS - 4

ER -

Rheochaos and flow instability phenomena in a nonionic lamellar phase

Abstract

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