Combined emulsifying capacity of polysaccharide particles of different size and shape

• Published in: Carbohydrate polymers Vol. 169; pp. 127 - 138
• Main Authors: Matos, María, Marefati, Ali, Bordes, Romain, Gutiérrez, Gemma, Rayner, Marilyn
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01-08-2017
• Subjects: Cellulose; Cellulose nanocrystal (CNC); Chemical Sciences; Chenopodium quinoa - chemistry; Emulsions; Kemi; Nanoparticles; Native quinoa starch (NQ); Natural Sciences; Naturvetenskap; Particle Size; Pickering emulsions; Polymer Chemistry; Polymerkemi; Polysaccharides - chemistry; Shape; Size; Stability; Cellulose nanocrystal (CNC); Pickering emulsions; Shape; Stability; Native quinoa starch (NQ); Size
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2017.04.006

•Pickering emulsions were prepared combining different polysaccharide particles.•Emulsifying capacity of starch granules and cellulose nanocrystals were combined.•A dual stabilization mechanism was observed.•Large particles prevent coalescence.•Small particles regulate the curvature of the interface and govern the droplet size.
The aim of this study is to understand mixed systems of two types of particles with different size and shape, quinoa starch granules (NQ) and cellulose nanocrystals (CNC), to stabilize oil-in-water (O/W) emulsions. This study considers the extent of Pickering stabilization with respect to which particle type dominates at droplet interfaces and how stability is affected by the addition of one particle type to already formed emulsions, or combining both, simultaneously.
Results demonstrate that the order of addition has an influence allowing to predominantly have NQ particles at the interface when both types are added simultaneously. However when CNC is added first, both types are responsible for emulsion stabilization leading to a system with an intermediate droplet size yet with a higher stability compared to single particle formulations. A dual stabilization mechanism is observed, large particles prevent coalescence and small particles regulate the curvature of the interface and govern the droplet size.