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ZnO deposited/encapsulated halloysite–poly (lactic acid) (PLA) nanocomposites for high performance packaging films with improved mechanical and antimicrobial properties
Abstract 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 (0–10mass%). 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 5mass%, 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%.
Graphical abstract Display Omitted
Highlights ZnO was successfully deposited on the inner and outer surfaces of Hal. Unlike ZnO/PLA films, ZnO-Hal/PLA films exhibited enhanced mechanical properties. PLA films with both ZnO and ZnO-Hal showed exceptional antimicrobial properties. Inclusion of ZnO-Hal into PLA led to high performance multifunctional active films.
ZnO deposited/encapsulated halloysite–poly (lactic acid) (PLA) nanocomposites for high performance packaging films with improved mechanical and antimicrobial properties
Abstract 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 (0–10mass%). 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 5mass%, 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%.
Graphical abstract Display Omitted
Highlights ZnO was successfully deposited on the inner and outer surfaces of Hal. Unlike ZnO/PLA films, ZnO-Hal/PLA films exhibited enhanced mechanical properties. PLA films with both ZnO and ZnO-Hal showed exceptional antimicrobial properties. Inclusion of ZnO-Hal into PLA led to high performance multifunctional active films.
ZnO deposited/encapsulated halloysite–poly (lactic acid) (PLA) nanocomposites for high performance packaging films with improved mechanical and antimicrobial properties
De Silva, Rangika T. (author) / Pasbakhsh, Pooria (author) / Lee, Sui Mae (author) / Kit, Aw Yoong (author)
Applied Clay Science ; 111 ; 10-20
2015-03-27
11 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2014