Abstract
Antibacterial hydroxypropyl methylcellulose (HPMC) films were prepared by incorporated with cinnamaldehye microcapsules and their properties were studied. Cinnamaldehye was encapsulated by chitosan and pectin through polyelectrolyte complexation. Encapsulation efficiency was 74.1% with 1:1 ratio of core and wall materials. Cinnamaldehye release rate from microcapsule increases with the increase of temperature and humidity. The micrographs show more surface irregularity in HPMC films with the addition of cinnamaldehye microcapsules. The tensile strength of HPMC films decreases with the increase of microcapsule content. The elongation at break of HPMC films is largest with 5% content of microcapsule. HPMC films with cinnamaldehye microcapsules show good antibacterial activities and 10% addition is enough for control Staphylococcus aureus and E.coli. The results show possibility of antimicrobial food packaging using incorporation of cinnamaldehye microcapsules into HPMC film.
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