Abstract
The chitosan (CTS) solutions supplemented with chitosan-montmorillonite (CTS-MMT) nanocomposites at various concentrations were prepared for free-standing films by the casting technique. Incorporating 2% CTS-MMT nanocomposites into the free-standing CTS films could improve the water-resistance and oxygen barrier of the film. For the postharvest experiment, CTS and CTS supplemented with CTS-MMT nanocomposite solutions were applied as banana fruit coating by the dipping technique. The CTS supplemented with 2% CTS-MMT showed a significant retarding in peel color change, reduced electrolyte leakage, and MDA content, while CTS coating could maintain fruit firmness and reduce plasma membrane destruction for only the first few days. In addition, the CTS supplemented with 2% CTS-MMT coating could reduce ethylene production and respiration rate of the banana fruit. Overall results suggest that the CTS supplemented with 2% CTS-MMT nanocomposites is a novel coating material for maintaining the postharvest quality of ‘Hom Thong’ banana fruit.
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