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Surfactant-based critical phenomena in microgravityThe objective of this research project is to characterize by experiment and theoretically both the kinetics of phase separation and the metastable structures produced during phase separation in a microgravity environment. The particular systems we are currently studying are mixtures of water, nonionic surfactants, and compressible supercritical fluids at temperatures and pressures where the coexisting liquid phases have equal densities (isopycnic phases). In this report, we describe experiments to locate equilibrium isopycnic phases and to determine the 'local' phase behavior and critical phenomena at nearby conditions of temperature, pressure, and composition. In addition, we report the results of preliminary small angle neutron scattering (SANS) experiments to characterize microstructures that exist in these mixtures at different fluid densities.
Document ID
19950008165
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kaler, Eric W.
(Delaware Univ. Newark, DE, United States)
Paulaitis, Michael E.
(Delaware Univ. Newark, DE, United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1994
Publication Information
Publication: NASA. Lewis Research Center, Second Microgravity Fluid Physics Conference
Subject Category
Materials Processing
Accession Number
95N14579
Funding Number(s)
CONTRACT_GRANT: NSF DMR-91-22444
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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