Biodegradable HPMC-chitosan film for moisture retention and quality preservation in fresh-cut mango

Replacing conventional plastics with biodegradable solutions that control moisture loss in fresh-cut produce is a strategic need. This study developed hydroxypropylmethylcellulose (HPMC) and chitosan (CS) films plasticised with glycerol (Gly) and evaluated their use as sealing lids for fresh-cut mango.

The selected monolayer formulation showed high optical clarity with limited transmittance at 560 nm, reduced water solubility and water-vapour permeability suited to moisture management. Attenuated total reflection Fourier transform infrared analysis indicated HPMC-CS compatibility and scanning electron microscopy imaging showed a continuous surface. Applied at 9 °C for nine days, the HPMC/CS+Gly film reduced weight loss by about fivefold relative to unpackaged fruit and approached the performance of commercial poly(vinyl chloride) in limiting dehydration, while maintaining fruit colour (Lab*) and firmness during storage. Package headspace measurements were consistent with a performance profile focused on moisture control.

The HPMC/CS+Gly film is a promising biodegradable option for mitigating dehydration and preserving quality in fresh-cut mango, and it provides a robust platform for future optimisation of gas-barrier properties and, where appropriate, incorporation of active functionalities. © 2025 The Author(s). Journal of the Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.