Three different emulsification techniques were studied: high pressure homogenisation, sonication and rotor-stator agitation. The emulsions were characterised by droplet size distribution and interface coverage by solid particles.
Fine and kinetically stable emulsions could be obtained from the 3 plant powders. Sonication and microfluidisation induce the unfolding of large particles, giving them an enlarged conformation and favouring their anchorage on the oil droplets.
The water-soluble fraction of powders plays a minor role in emulsification and storage stability, as the properties of emulsions are mainly determined by the insoluble fraction. At low powder content, the amount of interface and thus the drop size, varies linearly with the amount of adsorbed particles, allowing an accurate determination of the interfacial coverage.
LWT Publication, Volume 130, 2020: https: //doi.org/10.1016/j.lwt.2020.109621
Cécile Joseph (ab), Raphaëlle Savoire (a), Christelle Harscoat-Schiavo (a), Didier Pintori (b), Julien Monteil (a), Chrystel Faure (a), FernandoLeal-Calderon (a)
a University of Bordeaux, CNRS, Bordeaux INP, CBMN UMR 5248, 33600, Pessac, France
b ITERG, 33600, Pessac, France