Nano- and microstructure of high-internal phase emulsions under shear

Simple item page
dc.contributor.authorYaron, PNen_AU
dc.contributor.authorReynolds, PAen_AU
dc.contributor.authorMcGillivray, DJen_AU
dc.contributor.authorMata, JPen_AU
dc.contributor.authorWhite, JWen_AU
dc.date.accessioned2010-04-12T23:45:14Zen_AU
dc.date.accessioned2010-04-30T05:08:25Zen_AU
dc.date.available2010-04-12T23:45:14Zen_AU
dc.date.available2010-04-30T05:08:25Zen_AU
dc.date.issued2010-03-18en_AU
dc.date.statistics2010-03-18en_AU
dc.description.abstractHigh-internal phase aqueous-in-oil emulsions of two surfactant concentrations were studied using small-angle neutron scattering (SANS) and simultaneous in situ rheology measurements. They contained a continuous oil phase with differing amounts of hexadecane and d-hexadecane (for contrast matching experiments), a deuteroaqueous phase almost saturated with ammonium nitrate, and an oil-soluble stabilizing polyisobutylene-based surfactant. The emulsions’ macroscopic rheological behavior has been related to quantify changes in microscale and nanoscale structures observed in the SANS measurements. The emulsions are rheologically unexceptional and show, inter alia, refinement to higher viscosity after high shear, and shear thinning. These are explained by changes observed in the SANS model parameters. Shear thinning is explained by SANS-observed shear disruption of interdroplet bilayer links, causing deflocculation to more spherical, less linked, aqueous droplets. Refinement to higher viscosity is accompanied by droplet size reduction and loss of surfactant from the oil continuous phase. Refinement occurs because of shear-induced droplet anisotropy, which we have also observed in the SANS experiment. This observed anisotropy and the emulsion refinement cannot be reproduced by either isolated molecule or mean-field models but require a more detailed consideration of interdroplet forces in the sheared fluid. © 2010, American Chemical Societyen_AU
dc.identifier.citationYaron, P. N., Reynolds, P. A., McGillivray, D. J., Mata, J. P., & White, J. W. (2010). Nano- and microstructure of high-internal phase emulsions under shear. Journal of Physical Chemistry B, 114(10), 3500-3509. doi:10.1021/jp9084525en_AU
dc.identifier.govdoc1541en_AU
dc.identifier.issn1520-6106en_AU
dc.identifier.issue10en_AU
dc.identifier.journaltitleJournal of Physical Chemistry Ben_AU
dc.identifier.pagination3500-3509en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/jp9084525en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3151en_AU
dc.identifier.volume114en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectMicrostructureen_AU
dc.subjectEmulsionsen_AU
dc.subjectShearen_AU
dc.subjectSmall angle scatteringen_AU
dc.subjectHexadecaneen_AU
dc.subjectAnisotropyen_AU
dc.titleNano- and microstructure of high-internal phase emulsions under shearen_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.79 KB
Format:
Plain Text
Description:
Download
Collections
Journal Articles