Author/Authors :
Pagno، نويسنده , , Carlos H. and Costa، نويسنده , , Tania M.H. and de Menezes، نويسنده , , Eliana W. and Benvenutti، نويسنده , , Edilson V. and Hertz، نويسنده , , Plinho F. and Matte، نويسنده , , Carla R. and Tosati، نويسنده , , Juliano V. and Monteiro، نويسنده , , Alcilene R. and Rios، نويسنده , , Alessandro O. and Flôres، نويسنده , , Simone H.، نويسنده ,
Abstract :
Active biofilms of quinoa (Chenopodium quinoa, W.) starch were prepared by incorporating gold nanoparticles stabilised by an ionic silsesquioxane that contains the 1,4-diazoniabicyclo[2.2.2]octane chloride group. The biofilms were characterised and their antimicrobial activity was evaluated against Escherichia coli and Staphylococcus aureus. The presence of gold nanoparticles produces an improvement in the mechanical, optical and morphological properties, maintaining the thermal and barrier properties unchanged when compared to the standard biofilm. The active biofilms exhibited strong antibacterial activity against food-borne pathogens with inhibition percentages of 99% against E. coli and 98% against S. aureus. These quinoa starch biofilms containing gold nanoparticles are very promising to be used as active food packaging for the maintenance of food safety and extension of the shelf life of packaged foods.
Keywords :
Nanocomposite , Antibacterial , food packaging , Metal nanoparticles , Quinoa starch
