Effect of oil globule size on water exchange mechanism in water-in-oil-in-water emulsions

L. Vermeir,* M. Balcaen, A. Declerck and P. Van der Meeren
Ghent University, PaInT (Particle and Interfacial Technology group), Faculty of Bioscience Engineering, Coupure Links 653, 9000 Ghent, Belgium. Corresponding Author: [email protected]; [email protected]; [email protected]; [email protected]

The effect of oil globule size of a 20/20/60 (w/w/w) Water-in-Oil-in-Water double emulsion on water transport was investigated for two measurement temperatures using low-resolution 1H pulsed field gradient NMR diffusometry. The measured water diffusion signals were evaluated using available data analysis procedures, which revealed that water exchange mainly occurred between the inner and outer water phase through the oil phase of a double emulsion, provided that the oil globule size was small (about 6 μm) and the measurement temperature was high (35°C). For the double emulsion with approximately 50 μm sized oil globules or using a low measurement temperature of 5°C, water exchange happened mainly between the inner water phase and the oil phase within the oil globules of the double emulsion.


(since August 2017)