Influence of salt concentration on the formation of Pickering emulsions. Issue 31 (20th July 2020)

• Record Type: Journal Article
• Authors: French, David J.; Fowler, Jeff; Taylor, Phil; Clegg, Paul S.
• Is Part Of: Soft matter. Volume 16:Issue 31(2020)
• Page Start: 7342
• Page End: 7349
• Publication Date: 2020-07-20
• Subjects: Soft condensed matter -- Periodicals; 530.413
• DOI: 10.1039/d0sm00321b
• Languages: English
• ISSNs: 1744-683X

Abstract

Abstract : Confocal micrograph z -projection (left) and confocal micrograph (right) of oil droplets stabilised by colloidal silica as the concentration of NaCl is increased. The scale bars are 20 μm. Abstract : Here we study emulsification in a model experimental system comprised of water, an oil and colloidal particles. The particles are charge-stabilised colloidal silica; unsurprisingly, by varying the concentration of salt the degree of flocculation of the particles can be modified. The influence of salt on the formation of particle-stabilised oil droplets goes well beyond considerations of the colloidal stability of the particles. Our results demonstrate that the influence of salt on the particle–particle interaction is less important for emulsion formation than the influence of salt on both the particle wettability and the particle–interface interaction.