ZnO deposited/encapsulated halloysite-poly (lactic acid) (PLA) nanocomposites for high performance packaging films with improved mechanical and antimicrobial properties

Rangika Thilan De Silva, Pooria Pasbakhsh, Sui Mae Lee, Yoong Kit Aw

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    A new approach to enhance the antimicrobial properties of poly (lactic acid) (PLA) packaging films while retaining their thermo-mechanical properties was examined. Herein, ZnO nanoparticles were deposited on the outer and inner surfaces of halloysite nanotubes (Hal) using a novel solvothermal method and these ZnO deposited Hal (ZnO-Hal) were incorporated into the PLA matrix as a reinforcing filler. PLA nanocomposite films were fabricated using the solution casting method with different filler loadings (0-10. mass ). PLA nanocomposite films with ZnO had inferior mechanical properties while PLA films with ZnO-Hal showed significant improvements, where tensile strength and modulus increased by 30 and 65 with the addition of 5. mass , respectively. Antimicrobial tests revealed that ZnO-Hal can act as a promising antimicrobial agent against bacteria such as Escherichia coli and Staphylococcus aureus where the bacteria count reduced by more than 99 .
    Original languageEnglish
    Pages (from-to)10 - 20
    Number of pages11
    JournalApplied Clay Science
    Issue numberJuly 2015
    Publication statusPublished - 2015

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