In situ determination of the size and polydispersity of concentrated emulsions.
Droplet size distributions of concentrated, polydisperse oil-in-water emulsions have been measured using ultra small angle neutron scattering (USANS). The mean radii calculated by fitting a model for polydisperse hard spheres with excluded volume interactions to the USANS data were consistent with those derived from electroacoustics on diluted emulsions after correction for conductance behind the shear plane. The Porod radii measured by USANS were similarly consistent with the mean surface-area-weighted radii derived from electroacoustics, irrespective of the drop concentration or polydispersity.
Whitby
Catherine P
CP
School of Chemistry, The University of Sydney, NSW 2006, Australia.
Djerdjev
Alex M
AM
Beattie
James K
JK
Warr
Gregory G
GG