Rosmarinic acid and citral compounded bacteriostatic agent and application thereof

The invention discloses a compound bacteriostatic agent of rosmarinic acid and citral and application of the compound bacteriostatic agent, and belongs to the technical field of bacteriostatic agents. Aiming at the problems of poor mechanical property and poor antibacterial property of an edible film, the invention finds that when rosmarinic acid and citral are used together, the antibacterial activity is obviously enhanced due to a synergistic effect; rosmarinic acid and citral are dissolved in absolute ethyl alcohol with the concentration of 50% according to the mass ratio of (0.125-0.250): 0.0555, and the compound bacteriostatic agent is prepared. And then mixing a compound bacteriostatic agent chitosan solution and a sodium tripolyphosphate solution, and carrying out vacuum freeze drying to prepare the citral nanoparticles loaded with rosmarinic acid. And preparing the edible film with the thickness of 0.21 mm, the tensile strength of 9.30 N/mm < 2 > and the elongation at break of 175% from the nano parti