Methods for preparing food packaging films with antibacterial activity, and applications thereof

The present invention belongs to the technical field of edible films and relates to a method for preparing a food packaging film with antibacterial activity. By adding konjac glucomannan and glycerin in starch to obtain a composite film, the aggregation and rearrangement effect among molecules of amylose starch can be weakened, the defects such as high brittleness and low ductility of high-amylose corn starch can be improved, and, since the konjac glucomannan is rich in dietary fiber that is slowly digestible, a low-calorie edible packaging film can be produced by compounding. By adding the entrapped liquid of perilla oil and cyclodextrin in the mixed dispersion system of high-amylose corn starch and konjac glucomannan to prepare an active film, the film can have a smoother surface and more perfect and uniform structure, and also, the composite film can have a function of bacteria inhibition. The perilla oil is released intelligently and sustainably as the surrounding environment changes, during the storage of food, thereby providing more lasting bacteria inhibition effect. 11916771_1 (GHMatters) P112460.AU