Efficient reinforcement of chitosan-based coatings for Ricotta cheese with non-toxic, active, and smart nanoparticles

We developed new smart and active nanoparticles with a thermal sensing core and antibacterial, antioxidant, and UV-absorbing shell. Incorporation of the newly designed nanoparticles into the chitosan matrix in a CS:NPs mass ratio 1:0.5 results in advanced nanocomposite food coatings, which possess enhanced mechanical and barrier properties, together with higher antibacterial, antioxidant, and UV-absorbing activity. Moreover, the resultant food coatings are non-toxic. Thus, we prepared new food coatings, in which active (antibacterial, antioxidant, UV-absorbing) and smart (temperature sensitive) properties are enabled by the same single type of nanoparticles. The developed food coatings are efficient for the prolongation and improvement of shelf life of Ricotta cheese. © 2020 Elsevier B.V.