# Biodegradable HPMC–chitosan film for moisture retention and quality preservation in fresh‐cut mango

## TL;DR

This study introduces a biodegradable film made from HPMC and chitosan to preserve fresh-cut mango by reducing moisture loss and maintaining quality.

## Contribution

The development of a biodegradable HPMC–chitosan film with moisture control properties for fresh-cut mango packaging.

## Key findings

- The HPMC/CS+Gly film reduced weight loss by fivefold compared to unpackaged mango.
- The film performed similarly to poly(vinyl chloride) in limiting dehydration while preserving fruit color and firmness.
- The film showed compatibility and a continuous surface, indicating structural stability.

## Abstract

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.