Responsive packaging based on imine-chitosan films for extending the shelf-life of refrigerated fresh-cut pineapple

Reversible imine chemistry has been employed to stabilize antimicrobial liquid volatiles trans-2-hexenal (HX) and salicylaldehyde (SL) the surface of chitosan films. The reactivity both aldehydes amine groups was high synthesis bonds assessed by ATR-FTIR. hydrolysis release depended on pH medium. Films exerted in vitro microbiocidal effect against E. coli, S. cerevisae pineapple wild yeast when were immersed at 3.6. Finally, films incorporated double-bottom plastic containers filled with fresh-cut maintained 4 °C for 18 days. Juice leakage from pieces triggered headspace package. Both extended microbiological shelf-life fruit slowed down browning. SL increased juice affected firmness negatively.