| Abstrakt: |
A composite antibacterial film was prepared using agar and carrageenan as film-forming substrates, glycerol as the plasticizer, and different concentrations of the antibacterial agent nisin, and its physical and chemical indexes were comprehensively evaluated. This study was aimed at preventing microbial growth on blueberries and ameliorating the environmental pollution caused by traditional petroleum-based packaging materials. When the concentration of nisin in the compound antibacterial film was 0.28%, the antibacterial widths of Staphylococcus aureus and Listeria sp. were 3.326 and 1.812 mm, respectively; the water solubility, light transmittance, and tensile strength of the film were 45.01%, 79.78%, and 16.09 MPa, respectively. Therefore, the antibacterial film exhibited good water solubility and antibacterial, optical, barrier, and mechanical properties. Blueberries packaged with this antibacterial film at 4 and 20 ° had 4.20 and 2.46 lg cfu/g, respectively, of microbial content at the end of storage, and exhibited lower nutrient loss. Therefore, the composite film prepared for this test can help prolong the shelf life of blueberries. [ABSTRACT FROM AUTHOR] |
