Evaluation the Effect of Nano Silica Packaging Film on the Properties of Button Mushroom during Storage Time

In this research, some methods such as chitosan coating, nanocomposite film and modified atmosphere packaging were used to preserve button mushroom quality during storage time. Harvested mushrooms were divided in 2 groups, with and without coating (1% chitosan coating), then packed in 3 types of packages (common, Nano and Nano+MAP packages). Nano+MAP packages were contain 10% O2, 10% CO2 and 80% N2. All samples were placed at 4 °C for 10 days. Physical (moisture and color indecies), chemical (pH and TSS) and mechanical properties (Emod and Fmax) were measured and calculated every other days. In the other hand, O2 and CO2 changes were also measured during storage time. The results showed that chitosan coating, type of packaging, storage time and their mutual effects had significant effects on measured and calculated parameters. Application of nanofilm due to low permeability to O2 and CO2, and also MAP condition had positive effect on control of respiration and preservation of physical, mechanical and chemical properties of mushroom.