Preparation method of omega-3 unsaturated fatty acid-NK nano emulsion

The invention relates to the technical field of nano-emulsions, in particular to a preparation method of an omega-3 unsaturated fatty acid-NK nano-emulsion. The preparation method specifically comprises the following steps: (1) compounding emulsifiers: mixing the required emulsifiers according to a mass ratio to obtain a compound emulsifier; (2) preparing a mixed phase: adding the compound emulsifier in the step (1) into omega-3 unsaturated fatty acid according to a mass ratio, stirring at room temperature until the emulsifier is fully dissolved in the omega-3 unsaturated fatty acid, and taking an omega-3 unsaturated fatty acid mixed phase containing the emulsifier as an oil phase; adding nattokinase into water to form a water phase, wherein the proportion of the nattokinase in the water phase is 1.5-2%; (3) performing high-speed stirring and coarse emulsification: adding the aqueous phase containing nattokinase into the oil phase according to a volume ratio of 5: 1, and performing high-speed stirring at 6000