Preparation of a Sericin Composite Film Loaded with Rosmarinic Acid-Allicin Antibacterial Nanoparticles for Active Food Packaging Application

Abstract

This paper fabricated a new type of sericin composite film loaded with rosmarinic acid-allicin nanoparticles by the precipitation polymerization method and casting film method. Rosmarinic acid-allicin nanoparticles were used as antibacterial agents, and sericin was used as the carrier material of rosmarinic acid-allicin nanoparticles. The structures of rosmarinic acid-allicin nanoparticles and rosmarinic acid-allicin nanoparticle-sericin composite films were characterized by a Fourier transform infrared spectrometer, a UV–visible spectrophotometer, and a scanning electron microscope. The mechanical strength (0.56 MPa tensile strength and 152.1% strain rate), UV shielding performance (>80%), antioxidant performance (>90%), antibacterial performance (>99%), and biocompatibility (>85%) of rosmarinic acid-allicin nanoparticle-sericin composite films were researched. Test results demonstrated that this rosmarinic acid-allicin nanoparticle-sericin composite film exhibited high UV shielding performance, high antioxidant performance, high biocompatibility, and high antibacterial performance. In addition, this rosmarinic acid-allicin nanoparticle-sericin composite film can delay food spoilage as a packaging material effectively. This rosmarinic acid-allicin nanoparticle-sericin composite film can be used in the field of food packaging materials.