1(Hebei University of Science and Technology,Shijiazhuang 050018,China) 2(China National Research Institute of Food & Fermentation Industries Corporation Limited,Beijing 100015,China) 3(Hebei Drug Inspection and Research Institute,Shijiazhuang 050020,China)
Abstract: To develop food-grade delivery systems have become a hot spot to loaded hydrophobic bioactive molecules. In this study,an oil-rich lactoferrin and cinnamic acid composite microgel was prepared,and its stability and rheological characteristics as a functional oil carrier were studied. Results showed that the critical concentration to form organogels was 4%,and storing at 4 ℃ was helpful to the formation of crystals in the organogels. On this basis,lactoferrin was added to prepare a lactoferrin and cinnamic acid composite gel,which could weaken the shearing force and enhance its stability. Moreover,microgels contained 20% lactoferrin,4% cinnamic acid and 65% sea buckthorn seed oil remain stable because of their small droplets. Microgels have higher viscoelasticity and solid-liquid-balance of microgels was less than 0.5,which indicated that solid behavior dominates microgels. Microgels was highly unstable when stored at 85 ℃ or -18 ℃ cryogenic temperature,but remained stable when stored at 4 ℃ or 25 ℃. This provides theoretical support for the application of sea buckthorn seed oil in food industry and the construction of food delivery system.
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