Synthesis and characterization of tamarind kernel powder-based antimicrobial edible films loaded with geraniol

Abstract The current work is focused on the synthesis of tamarind kernel powder-based edible films that were loaded with the antimicrobial agent (geraniol). The prepared films were characterized for physical, optical, microstructural, molecular, barrier, and antimicrobial properties. The incorporation of geraniol resulted in the formation of rough-surfaced films, as observed from E-SEM micrographs. FTIR study demonstrated reduction in hydrogen bonding with the addition of geraniol. XRD analysis indicated a pre-dominant amorphous property of the films. However, the incorporation of geraniol in low concentrations promoted crystallite growth. WVTR, Young's modulus, and tensile strength exhibited a decreasing trend with the addition of geraniol. The percentage stress relaxation of the film increased with the increase in the loading concentration of geraniol. The geraniol-loaded films showed robust antimicrobial effectiveness against both Bacillus cereus and Escherichia coli. These results showed that the films have a high potential to be used in the development of antimicrobial packaging films for food applications.