Physicochemical characteristics and anti-oxidant capacity of pullulan active packaging containing green synthesised nanoparticles

The effects of incorporating green-synthesised silver nanoparticles (AgNPs) on oxidative stability, antioxidant activity, chromatography, chroma, hue, depth (D), pH, volume, moisture sorption, solubility and density of pul-lulan active packaging were examined here. The impact of various concentrations of AgNPs (0.5%, 1% and 2% v/v) on four groups of pullulan active packaging (PF-CTRL, PF-C-AgNPs, PF-P-AgNPs and PF-M-AgNPs) was also determined. During 14 days of storage, pullulan active packaging incorporating 2% (v/v) curcumin-stabilised AgNPs (PF-C-AgNPs) had significantly reduced transparency, pH and film density, as well as significantly better oxidative stability and antioxidant activity than the other groups. The integration of green AgNPs into edible pul-lulan films did not significantly affect film D, moisture sorption or film solubility. These results suggest that pul-lulan active packaging, especially PF-C-AgNPs, can resist oxidation and degradation and maintain better quality and tactile characteristics during refrigerated storage.

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