Ripening of Nonaqueous Emulsions of n-Decane in Dimethyl Sulfoxide Observed by Time-Resolved Spin-Echo Small-Angle Neutron Scattering (SESANS)

Since macroemulsions are only kinetically stable, characterizing their behavior as they change over time is relevant to their application. Time-of-flight spin-echo small-angle neutron scattering (SESANS) enables time-resolved measurement of the bulk evolution of concentrated, opaque emulsions withou...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1985. - (2025) vom: 19. Mai
1. Verfasser: Grünewald, E Wouter (VerfasserIn)
Weitere Verfasser: Dalgliesh, Robert M, Parnell, Steven R, Bouwman, Wim G, Smith, Gregory N
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2025
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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245 1 0 |a Ripening of Nonaqueous Emulsions of n-Decane in Dimethyl Sulfoxide Observed by Time-Resolved Spin-Echo Small-Angle Neutron Scattering (SESANS) 
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520 |a Since macroemulsions are only kinetically stable, characterizing their behavior as they change over time is relevant to their application. Time-of-flight spin-echo small-angle neutron scattering (SESANS) enables time-resolved measurement of the bulk evolution of concentrated, opaque emulsions without perturbing the system. Here, we present time-of-flight SESANS measurements of an n-decane-in-DMSO emulsion stabilized by Pluronic P-123, where changes in the system as it ripened were resolved. The radius of emulsion droplets were shown to grow over time with a rate of 25 μm3 h-1, suggesting that Ostwald ripening is the dominant aging process. Furthermore, SANS measurements revealed the presence of a stable population of swollen surfactant micelles, providing an additional mechanism for mass transfer between particles. Since time-of-flight SESANS can be used to obtain information about particle sizes, ripening rates, and associated processes, it is uniquely suited for studying the behavior of dense colloidal systems over time 
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700 1 |a Dalgliesh, Robert M  |e verfasserin  |4 aut 
700 1 |a Parnell, Steven R  |e verfasserin  |4 aut 
700 1 |a Bouwman, Wim G  |e verfasserin  |4 aut 
700 1 |a Smith, Gregory N  |e verfasserin  |4 aut 
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