This study reports the effects on antimicrobial, antioxidant, migration and disintegrability activities ofternary nanocomposite films based on poly(lactic acid) incorporating two biobased nanofillers, (cellu-lose nanocrystals (CNC) and lignin nanoparticles (LNP)), in two different amounts (1 and 3% wt.). Resultsfrom antimicrobial tests revealed a capacity to inhibit the Gram negative bacterial growth of Xanthomonasaxonopodis pv. vesicatoria and Xanthomonas arboricola pv. pruni along the time, offering innovative oppor-tunities against dangerous bacterial plant pathogens. LNP proved to be highly efficient in antioxidationactivity, based on the disappearance of the absorption band at 517 nm of the free radical, 2,2-diphenyl-1-picrylhydrazyl (DPPH) upon reduction by an antiradical compound; moreover the combination of LNPand CNC generates a synergistic positive effect in the antioxidation response of PLA ternary films. Further-more, all the studied formulations showed a disintegrability value up to 90% after 15 days of incubation incomposting conditions. Migration results showed that the films can be considered suitable for applicationin food packaging field.
Effect of cellulose and lignin on disintegration, antimicrobial andantioxidant properties of PLA active films
YANG, WEIJUN;FORTUNATI, ELENA;DOMINICI, FRANCO;KENNY, Jose Maria;PUGLIA, Debora
2016
Abstract
This study reports the effects on antimicrobial, antioxidant, migration and disintegrability activities ofternary nanocomposite films based on poly(lactic acid) incorporating two biobased nanofillers, (cellu-lose nanocrystals (CNC) and lignin nanoparticles (LNP)), in two different amounts (1 and 3% wt.). Resultsfrom antimicrobial tests revealed a capacity to inhibit the Gram negative bacterial growth of Xanthomonasaxonopodis pv. vesicatoria and Xanthomonas arboricola pv. pruni along the time, offering innovative oppor-tunities against dangerous bacterial plant pathogens. LNP proved to be highly efficient in antioxidationactivity, based on the disappearance of the absorption band at 517 nm of the free radical, 2,2-diphenyl-1-picrylhydrazyl (DPPH) upon reduction by an antiradical compound; moreover the combination of LNPand CNC generates a synergistic positive effect in the antioxidation response of PLA ternary films. Further-more, all the studied formulations showed a disintegrability value up to 90% after 15 days of incubation incomposting conditions. Migration results showed that the films can be considered suitable for applicationin food packaging field.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
