| Phytosterols +γ-oryzanol-based organogel was prepared with rice bran oil as the oil solvent. The rheology, hardness, brittleness, crystal form and crystal morphology of the organogel were determined by rheometer, texture analyzer, X-ray diffraction and polarizing microscope. The results showed that when the mass ratio of phytosterols to γ-oryzanol was 40∶60, the hardness and the melting point of organogel were the highest, while the brittleness was the lowest. The hardness and the melting point of the organogel increased with the increase of the amounts of phytosterols and γ- oryzanol, while the brittleness was the opposite. The mixture of phytosterol esters and phytosterols could not form gel in rice bran oil. The presence of phytosterol esters exhibited resistance to hinder gel forming. The hardness and the viscosity of the organogel reduced as the amount of phytosterol esters improved, while the melting point and the brittleness were the opposite. In addition, the gel formation time prolonged as the amount of phytosterol esters increased. Besides, when shear was applied in the cooling process, the hardness, the viscosity and the melting point of the organogel reduced, while brittleness increased. The crystal form of phytosterols +γ-oryzanol-based organogel was β-form crystal. With storage time prolonging, the network structure of fibers gradually formed and developed in the organogel. |
