Transient-electric-birefringence study of rodshaped water-in-oil microemulsions

Vittorio Degiorgio, Francesco Mantegazza, Mario E. Giardini, Brian H. Robinson, A. Louise Price, David C. Steytler

Research output: Contribution to conferenceAbstract

Abstract

Transient electric-birefringence (TEB) and smallangle neutron-scattering (SANS) studies have been carried out on w/o microemulsions stabilised by the nickel salt of di(ethyl)hexylsulphosucclnate Ni(AOT)2. The system fonns rods at low water contents, which convert to more spherical aggregates as the concentration of water is increased. TEB data have been obtained as a function of volume fraction and water content, both below and above the entanglement regime. The asymptotic decay of birefringence is well described by a stretched-exponential function [1]. The dynamic data have been analysed following consideration of the theory by Cates [2] assuming that the rods are rigid, polydlsperse and can undergo reversible scission. The static data have been interpreted developing a theoretical model to calculate the polarizabilities along and orthogonal to the symmetry axis of the rod [3]. With the aid of this model, we can justify an apparent collective effect In the specific Kerr constant and compare the rod dimensions measured by SANS and by TEB. A reasonably good agreement is obtained.

Conference

Conference11th Conference of the European Colloid and Interface Society
CountryNetherlands
CityLunteren
Period14/09/9719/09/97

Fingerprint

Microemulsions
Birefringence
birefringence
Oils
rods
oils
Water
Neutron scattering
Water content
water
moisture content
neutron scattering
Exponential functions
exponential functions
Nickel
cleavage
Volume fraction
Salts
nickel
salts

Keywords

  • transient electric-birefringence
  • rod-shaped
  • water-in-oil
  • microemulsions
  • small angle neutron scattering

Cite this

Degiorgio, V., Mantegazza, F., Giardini, M. E., Robinson, B. H., Price, A. L., & Steytler, D. C. (1997). Transient-electric-birefringence study of rodshaped water-in-oil microemulsions. Abstract from 11th Conference of the European Colloid and Interface Society, Lunteren, Netherlands.
Degiorgio, Vittorio ; Mantegazza, Francesco ; Giardini, Mario E. ; Robinson, Brian H. ; Price, A. Louise ; Steytler, David C. / Transient-electric-birefringence study of rodshaped water-in-oil microemulsions. Abstract from 11th Conference of the European Colloid and Interface Society, Lunteren, Netherlands.
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abstract = "Transient electric-birefringence (TEB) and smallangle neutron-scattering (SANS) studies have been carried out on w/o microemulsions stabilised by the nickel salt of di(ethyl)hexylsulphosucclnate Ni(AOT)2. The system fonns rods at low water contents, which convert to more spherical aggregates as the concentration of water is increased. TEB data have been obtained as a function of volume fraction and water content, both below and above the entanglement regime. The asymptotic decay of birefringence is well described by a stretched-exponential function [1]. The dynamic data have been analysed following consideration of the theory by Cates [2] assuming that the rods are rigid, polydlsperse and can undergo reversible scission. The static data have been interpreted developing a theoretical model to calculate the polarizabilities along and orthogonal to the symmetry axis of the rod [3]. With the aid of this model, we can justify an apparent collective effect In the specific Kerr constant and compare the rod dimensions measured by SANS and by TEB. A reasonably good agreement is obtained.",
keywords = "transient electric-birefringence, rod-shaped, water-in-oil, microemulsions, small angle neutron scattering",
author = "Vittorio Degiorgio and Francesco Mantegazza and Giardini, {Mario E.} and Robinson, {Brian H.} and Price, {A. Louise} and Steytler, {David C.}",
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note = "11th Conference of the European Colloid and Interface Society ; Conference date: 14-09-1997 Through 19-09-1997",

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Degiorgio, V, Mantegazza, F, Giardini, ME, Robinson, BH, Price, AL & Steytler, DC 1997, 'Transient-electric-birefringence study of rodshaped water-in-oil microemulsions' 11th Conference of the European Colloid and Interface Society, Lunteren, Netherlands, 14/09/97 - 19/09/97, .

Transient-electric-birefringence study of rodshaped water-in-oil microemulsions. / Degiorgio, Vittorio; Mantegazza, Francesco; Giardini, Mario E.; Robinson, Brian H.; Price, A. Louise; Steytler, David C.

1997. Abstract from 11th Conference of the European Colloid and Interface Society, Lunteren, Netherlands.

Research output: Contribution to conferenceAbstract

TY - CONF

T1 - Transient-electric-birefringence study of rodshaped water-in-oil microemulsions

AU - Degiorgio, Vittorio

AU - Mantegazza, Francesco

AU - Giardini, Mario E.

AU - Robinson, Brian H.

AU - Price, A. Louise

AU - Steytler, David C.

PY - 1997/9/14

Y1 - 1997/9/14

N2 - Transient electric-birefringence (TEB) and smallangle neutron-scattering (SANS) studies have been carried out on w/o microemulsions stabilised by the nickel salt of di(ethyl)hexylsulphosucclnate Ni(AOT)2. The system fonns rods at low water contents, which convert to more spherical aggregates as the concentration of water is increased. TEB data have been obtained as a function of volume fraction and water content, both below and above the entanglement regime. The asymptotic decay of birefringence is well described by a stretched-exponential function [1]. The dynamic data have been analysed following consideration of the theory by Cates [2] assuming that the rods are rigid, polydlsperse and can undergo reversible scission. The static data have been interpreted developing a theoretical model to calculate the polarizabilities along and orthogonal to the symmetry axis of the rod [3]. With the aid of this model, we can justify an apparent collective effect In the specific Kerr constant and compare the rod dimensions measured by SANS and by TEB. A reasonably good agreement is obtained.

AB - Transient electric-birefringence (TEB) and smallangle neutron-scattering (SANS) studies have been carried out on w/o microemulsions stabilised by the nickel salt of di(ethyl)hexylsulphosucclnate Ni(AOT)2. The system fonns rods at low water contents, which convert to more spherical aggregates as the concentration of water is increased. TEB data have been obtained as a function of volume fraction and water content, both below and above the entanglement regime. The asymptotic decay of birefringence is well described by a stretched-exponential function [1]. The dynamic data have been analysed following consideration of the theory by Cates [2] assuming that the rods are rigid, polydlsperse and can undergo reversible scission. The static data have been interpreted developing a theoretical model to calculate the polarizabilities along and orthogonal to the symmetry axis of the rod [3]. With the aid of this model, we can justify an apparent collective effect In the specific Kerr constant and compare the rod dimensions measured by SANS and by TEB. A reasonably good agreement is obtained.

KW - transient electric-birefringence

KW - rod-shaped

KW - water-in-oil

KW - microemulsions

KW - small angle neutron scattering

UR - http://www.ecis-web.eu/

UR - http://www.ecis-web.eu/lunteren-1997.htm

M3 - Abstract

ER -

Degiorgio V, Mantegazza F, Giardini ME, Robinson BH, Price AL, Steytler DC. Transient-electric-birefringence study of rodshaped water-in-oil microemulsions. 1997. Abstract from 11th Conference of the European Colloid and Interface Society, Lunteren, Netherlands.