Effects of tannic acid modifying propylene glycol alginate as surface stabilizers on the emulsification stability of Trichosanthes kirilowii seed oil diacylglycerol

In this study, Trichosanthes kirilowii seed oil diglyceride (DAG) emulsion was prepared by using tannic acid (TA), propylene glycol alginate (PGA) and diglycerides, and the TA-PGA composite was used as a surface stabilizer for DAG. The results showed that the TA-PGA composite prepared at pH 4.0 and the mass ratio of TA to PGA of 0.8 could achieve an embedding rate of 70.5% for Trichosanthes kirilowii seed oil DAG. The particle size of the emulsion under these conditions was 13.8 μm, and the surface potential was -28.8 mV. This result indicates that the TA-PGA composite-embedded DAG emulsion improves the emulsification and oxidative stability of DGA, and provides an innovative approach for expanding the potential applications of Trichosanthes kirilowii seed oil DAG in the food industry. • TA and PGA form a stable composite by hydrogen bonding. • The composite can embed Trichosanthes kirilowii oil DAG emulsion well. • The composite can be used as surface stabilizer for DAG emulsion. • The composite can improve DAG emulsion stability, antioxidant capacity.