Metal Ion-Mediated Interfacial Coordination Complexation in Octyl Gallate-Curcumin Emulsions: Enhanced Stability and Curcumin Protection.

ABSTRACT: This study developed an efficient interfacial stabilization strategy, using metal ions (Cu²⁺) and octyl gallate (OG) to protect curcumin (Cur) via interfacial coordination. Macroscopic observation, droplet size, and Turbiscan stability index analysis demonstrated that the addition of Cu²⁺ to the OG/Cur emulsion significantly influenced its emulsification efficiency and physical stability, which depended on both the OG concentration and the amount of Cu²⁺ added. Interfacial rheological analysis showed that Cu²⁺ addition significantly enhanced droplet interfacial strength, with distinct effects from different metal ions. FT-IR confirmed the coordination bonds of Cu²⁺ with both Cur (keto/enol) and OG (phenolic hydroxyl). Under appropriate

SUBMITTER: Li T 

PROVIDER: S-EPMC12840199 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature