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2025 AOCS Annual Meeting & Expo.

Protein and Co-Products

Protein-Based Materials and Co-Products for Food and Non-Food Applications II

High internal phase Pickering emulsion stabilized by thermally-treated quinoa protein isolate: Preparation and encapsulation for curcumin and astaxanthin

Tuesday, April 29, 2025

2:15 PM – 2:35 PM PST

Room: B117-119

Presenting Author(s)

JX

Jingwen Xu

Associate Professor
Shanghai Ocean University
Shanghai City, Shanghai, China (People's Republic)

Co-Author(s)

JC

Jiaojiao Chang

Ms.
Shanghai Ocean University, China (People's Republic)
YZ

Yong Zhao

Dr
Shanghai, China (People's Republic)

Abstract: High internal phase Pickering emulsions (HIPPEs) were stabilized by thermally-treated quinoa protein isolate (QPI) such as atmospheric pressure boiling (AB), high pressure boiling (HPB) and baking (B), respectively, for the encapsulation curcumin and astaxanthin to retard its degradation during storage and improve their bioaccessibility. The QPI dispersion was sonicated to generate nanoparticles for the production of HIPPEs. The microstructure results indicated that QPIs nanoparticles tightly coated the surface of oil droplets and formed a tight interfacial film, confirming that the nature of O/W of HIPPEs stabilized by QPI nanoparticles. The heat treatment reduced the droplet size by approximately 11%, 15%, 3% for HIPPEs stabilized by AB-QPI, HPB-QPI, and B-QPI, respectively compared to those of control QPI, which effectively improved the viscoelasticity and storage stability of the emulsion. The stability of HIPPE stabilized with HPB-QPI was the best, superior to AB-QPI >B-QPI >control-QPI. HIPPEs stabilized by thermally-treated QPI showed high retention rate of curcumin of 55.27% (corn oil) to 83.03% (HPB-QPI) and astaxanthin 60.89% (corn oil) to 86.58% (HPB-QPI), respectively, after 8-day of storage at room temperature. Bioaccessibility of curcumin and astaxanthin encapsulated with HIPPEs stabilized by thermally-treated QPI was significantly increased during in vitro digestion, wherein, HPB-QPI >AB-QPI >B-QPI >control QPI >corn coil