In this talk, we will discuss recent work on the application of carbohydrate nanoparticles in emulsion systems. Functional nanoparticles were made from phytoglycogen (PG), a dendrimer-like polysaccharide from mutant maize. Among various chemical substitutions, octenyl succinylation was used to bring both charge and hydrophobicity to PG nanoparticles. The derivative, phytoglycogen octenyl succinate (PG-OS) was able to form highly stable oil-in-water Pickering emulsion. Particularly, these nanoparticles can be distributed at the oil-water interface to form a dense and thick layer to protect lipophilic compounds in the oil droplets or to hold bioactive compounds for controlled delivery. For example, epsilon-polylysine (EPL), a functional peptide can be incorporated within PG-OS-stabilized emulsions for two distinct purposes: (1) to protect the lipophilic compounds in the emulsion, or (2) to realize a prolonged release of EPL against food pathogens such as E. coli O157:H7. While the constituents of the interfacial layer were the same (PG-OS and EPL), different purposes required specific construction procedures for optimized outcomes.

Carbohydrate nanoparticle-stabilized emulsions to deliver bioactive food components

243rd National Meeting (2012)

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