Construction and characterization of sesame meal-stabilized Pickering high internal phase emulsions and their...

Pickering high internal phase emulsions (HIPEs) show promise for solid fat replacement and nutrient delivery, but the availability of safe and easily accessible food-borne particulate emulsifiers is a bottleneck limiting their practical application. In this study, the feasibility of using sesame meal as an emulsifier for the construction of sunflower oil-based Pickering HIPEs was evaluated. These HIPEs were then characterized in terms of their microstructural and mechanical properties, and utilized as a substitute for butter in cake production. Results showed that sesame meal is rich in protein, and has a particle size (median diameter, 46.40 ± 0.83 μm), and wettability that makes it suitable for use as an emulsifier. It stabilized O/W type Pickering HIPEs formulated with sunflower oil with a volume fraction of up to 80 %. The mechanical properties of these Pickering HIPEs were positively correlated with the concentration of sesame meal. Sunflower oil-based HIPEs prepared from sesame meal can partially replace butter for cake preparation when φ = 80 % and c = 9.0 %, and enhance the internal pore structure of cake when butter substitution (W_b) ≤ 30 %. This provides a new way to use sesame meal and new type of food-grade Pickering HIPEs.