Abstract

Sago palm weevil (Rhynchophorus ferrugineus) larvae (SPWL) is a potential lipid source. In this study, Pickering emulsions produced with electrosprayed sodium caseinate (NaCas-ES) particles and SPWL oil were investigated. These particles were fabricated by using the electrohydrodynamic process and evaluated with zeta analysis, scanning electron microscope (SEM), modulated differential scanning calorimetry, and drop tensiometer. The process affected the NaCas particles formed, as evidenced by SEM with an average particle size of 200 nm, irregular granular structures, higher zeta potential, and new features through thermal analysis without altering the surface activity. Pickering emulsions were formulated with 0.05 wt% protein particles and varying oil contents (1–4 wt% SPWL oil). These emulsions were then evaluated for physicochemical stability over 14 days, focusing on droplet size, morphology, lipid oxidation products formation, and tocopherol depletion. Notably, all emulsions (1–4 wt% oil) demonstrated good physical and oxidative stability throughout the storage period. The emulsion containing 3 wt% SPWL oil exhibited exceptional stability, characterized by an unchanged droplet size and minimal formation of lipid oxidation products. The results of this study demonstrate the promising application of emulsions produced with SPWL oil and NaCas-ES particles, with good physicochemical stability.