Development and characterization of self-emulsifying high internal phase emulsions using endogenous phospholipids from Antarctic krill oil.

[Display omitted] • Self-emulsifying HIPEs (SHIPEs) were developed by functional krill oil(KO). • Self-assemble of phospholipids (PLs) in the KO dominated the SHIPEs formation. • PLs lamellar network on the droplets surface contributed to SHIPE gels. • NaCl and sucrose adversely affected SHIPEs gel by dehydrating the PL lamellar. • SHIPEs exhibited potential as structured oil for application in 3D printing food. High internal phase emulsions (HIPEs) have emerged as a promising structured oil system in food industry. This study developed self-emulsifying HIPEs (SHIPEs) using Antarctic krill oil (KO) with endogenous phospholipids as surfactant and algae oil as a diluent. The influence of phospholipids self-assembly on SHIPEs formation was investigated by evaluating the microstructures, particle size, rheological properties, and water distribution. Results demonstrated that the concentration and self-assembly behavior of phospholipids dominated the SHIPEs formation. Optimized SHIPEs with desirable gel properties contained 10 wt% krill oil in the oil phase at an 80 wt% oil phase level. Furthermore, these SHIPEs exhibited excellent performance in 3D printing applications. Hydrated phospholipids formed lamellar network at the oil–water interface, enhancing gel strength by crosslinking oil droplets. These findings shed light on the self-assembly of phospholipids during HIPEs formation and highlight the potential phospholipids-rich marine lipids in SHIPEs for functional food products development. [ABSTRACT FROM AUTHOR]