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Neutron Reflection Measurement of Near-Surface Structural Change in an Oil-Water-Surfactant System

Published online by Cambridge University Press:  22 February 2011

U. Jeng ,
L. Esibov ,
M. L. Crow  and
A. Steyerl
U. Jeng
Affiliation:
University of Rhode Island, Department of Physics, Kingston, RI 02881
L. Esibov
Affiliation:
University of Rhode Island, Department of Physics, Kingston, RI 02881
M. L. Crow
Affiliation:
University of Rhode Island, Department of Physics, Kingston, RI 02881
A. Steyerl
Affiliation:
University of Rhode Island, Department of Physics, Kingston, RI 02881
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Abstract

The interfacial characteristics of an oil-water-surfactant sample were studied using the thermal neutron reflectometer at the Rhode Island Nuclear Science Center (RINSC). The sample was a mixture of deuterated octane with H2O and non-ionic surfactant (C10E4), spread onto an H2O substrate. A mixture of low surfactant concentration was used so that it could demix into a lamellar oil-water structure, stabilized by a monolayer of surfactant intervening at each oil-water interface. The reflectivity data showed a clearly visible difference between 25.2° C and 30.2°C, indicating that the significant increase of interfacial tension between these two temperatures induced a structural transition.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 376: Symposium BB – Neutron Scattering in Materials Science , 1994 , 217
Copyright
Copyright © Materials Research Society 1995

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References

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