Whey protein isolate-epigallocatechin gallate covalent compound-based lemon essential oil nano-emulsion coating preservative as well as preparation method and application of whey protein isolate-epigallocatechin gallate covalent compound-based lemon essential oil nano-emulsion coating preservative

The invention provides a lemon essential oil nano-emulsion coating preservative based on a whey protein isolate-epigallocatechin gallate (WPI-EGCG) covalent compound as well as a preparation method and application of the lemon essential oil nano-emulsion coating preservative, and belongs to the field of food preservation. The preparation method of the coating preservative comprises the following steps: taking lemon essential oil as an oil phase, taking a WPI-EGCG aqueous solution as a water phase, mixing the water phase with the oil phase, Tween-80 and glycerol, homogenizing to prepare a crude emulsion, and performing ultrasonic treatment on the crude emulsion to prepare a nano-emulsion. The lemon essential oil emulsion is stabilized by the protein-polyphenol covalent compound, the antioxidant and antibacterial activity of the lemon essential oil emulsion is enhanced, and the prepared nano-emulsion coating preservative can effectively prolong the refreshing time of the sauced meat. 本发明提供了一种乳清分离蛋白-表没食子儿茶素没食子酸酯