Soy Protein Isolate-Phosphatidylcholine Nanoemulsions Prepared Using High-Pressure Homogenization

AbstractThe nanoemulsions of soy protein isolate-phosphatidylcholine (SPI-PC) with different emulsion conditions were studied. Homogenization pressure and homogenization cycle times were varied, along with SPI and PC concentration. Evaluations included turbidity, particle size, ζ-potential, particle distribution index, and turbiscan stability index (TSI). The nanoemulsions had the best stability when SPI was at 1.5%, PC was at 0.22%, the homogenization pressure was 100 MPa and homogenization was performed 4 times. The average particle size of the SPI-PC nanoemulsions was 217 nm, the TSI was 3.02 and the emulsification yield was 93.4% of nanoemulsions.Keywords: soy protein isolate, phosphatidylcholine, nanoemulsions, high-pressure homogenization1. IntroductionNanoemulsions are emulsions where the droplets are 100 nm to 500 nm [1]. The advantages of nanoemulsions are high optical clarity, good physical stability against gravitational separation and droplet aggregation, and enhanced bioav...