Is there a difference between surfactant-stabilised and Pickering emulsions?

Abstract

What measurable physical properties allow one to distinguish surfactant-stabilised from Pickering emulsions? Whereas surfactants influence oil/water interfaces by lowering the oil/water interfacial tension, particles are assumed to have little effect...

Amphiphilic interaction-mediated ordering of nanoparticles in Pickering emulsion droplets

“…This work also indicated the occurrence of droplet coalescence at higher temperatures, which could be triggered by a structural imbalance at higher temperatures owing to the lack of the hydrophobic-hydrophilic balance between the PEO and PPO blocks and silica. The present study also calls for future experiments and further understanding of the coalescence mechanisms in different nanoparticle-coated emulsion systems, as also indicated by Dekker et al 49…”

“…The observed growth of the droplet size suggests that even such Pickering emulsions are somewhat prone to ripening over time. A recent paper by Dekker et al 49 also discussed that Pickering emulsions undergo coalescence with rates comparable to those of surfactant-based emulsions. This is in contrast to the standard notion that Pickering emulsions draw advantage over conventional emulsions because of their superior stability.…”

“…As mentioned earlier, the hydrophobicity of the PEO and PPO blocks increases 55 with an increase in the temperature, and this starts to destabilize the delicate balance among the amphiphilic interactions amongst the tri-block co polymer, the silica nanoparticles and the lavender oil. However, as mentioned by Dekker et al , 49 such destabilization is complex and needs further attention.…”

“…Thus, a temporal variation ∼ t 2 is primarily due to the coalescence of the droplets. Here, we must mention that the mechanism of coalescence in such particle-coated emulsion droplets and particularly in multi-layered emulsion droplets is complex 49 and needs further attention. As mentioned earlier, in the recent study of Dekker et al , 49 the formation of multi-layers at the droplet interface was also inferred.…”

“…Here, we must mention that the mechanism of coalescence in such particle-coated emulsion droplets and particularly in multi-layered emulsion droplets is complex 49 and needs further attention. As mentioned earlier, in the recent study of Dekker et al , 49 the formation of multi-layers at the droplet interface was also inferred. Furthermore, these authors concluded that both surfactants and particles result in a significant decrease in the interfacial tension, and this is probably one of the factors that govern the droplet coalescence in such a dynamic system.…”