Electrospun chitosan-based nanofibers loading tea tree oil for fresh salmon fillet shelf-life extension

Bioactive packaging can improve the shelf-life of food products and enhance consumer health. It can also alleviate environmental stress on the planet by reducing food waste. Here, the electrospinning of tea tree oil-loaded 2-hydroxypropyltrimethyl ammonium chloride chitosan nanofibers was investigated. The fabricated nanofiber films were characterized by scanning electron microscopy, thermal gravimetric analysis, Fourier transform infrared spectroscopy, and contact angle meter analysis. The prepared nanofibers have a well-defined diameter of about 200 nm and a smooth shape. They have good antibacterial properties against Staphylococcus aureus and Escherichia coli in vitro. Tea tree oil-loaded chitosan-based nanofibers were found to be effective in delaying spoilage and extending the shelf life of salmon by sensory evaluation, texture analysis, color, total viable counts, thiobarbituric acid, and total volatile basic nitrogen during storage in the freshness experiments, thus indicating their health benefits in bioactive packaging.