Abstract
Antimicrobial low-density polyethylene (LDPE) and poly(lactide) (PLA) films were prepared by blending with grapefruit seed extract (GSE) incorporated thermoplasticized starch (TPS) using extrusion blowing and extrusion casting methods, respectively. The effect of polymer matrix was studied by comparing the film properties such as optical, mechanical, water vapor barrier, and antimicrobial properties. Scanning electron micrograph (SEM) result indicated that the TPS was homogeneously dispersed through both polymer matrix. Though transparency, mechanical, and gas barrier properties of the blend films decreased compared with their neat films, the blend films showed UV-light screening function and antimicrobial activity against food-borne pathogenic bacteria, E. coli and Listeria monocytogenes, which was mainly attributed to the GSE. While PLA/TPS film exhibited strong antibacterial activity against both bacteria, LDPE/TPS film showed lower antibacterial activity. This was presumably because the GSE was entrapped more tightly by the LDPE than the PLA. Packaging application test using minced fish paste also showed that the PLA/TPS film was more effective to prevent bacterial growth than LDPE/TPS film.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
