Hemp seed oil oleogels stabilized by a soy protein isolate‑sodium alginate complex: Structural characterization and...

Composite oleogels were prepared using a soy protein isolate (SPI)‑sodium alginate (SA) complex in synergy with rice bran wax (RBW). The effect of SA addition on composite oleogels was investigated, and kinetic models for oxidation and Δ⁹-tetrahydrocannabinol degradation (Δ⁹-THC) were established. Research found that when the SA concentration was increased to 1.25 wt%, the obtained composite oleogel reached its optimal state, with a dense and mechanically strong SPI-SA framework formed internally and almost no oil leakage externally. Fourier transform infrared spectroscopy indicated the presence of hydrogen bonds, van der Waals forces, hydrophobic interactions, and electrostatic attractions in the composite oleogels. An oxidation kinetic model was established for the composite oleogel, and the resulting equation is c=e^20.8594e^-7324.3829Tt+0.98, and the degradation rate of Δ⁹-THC was calculated to be 0.0043 days^-1, with a half-life of 160.63 days. The results indicate that composite oleogelation can reduce lipid oxidation and delay active substance degradation.