Imp regnation of Porcel ain Pots with Silver Nanopar ticles via Pervapora tion and Study of the Effects on Pathogens (E scherichi a coli, Sta phylococc us aureus) in the Contacted Brot h

Growth of Patho enic micro organisms is one of the major challenges in food industr y. An innov ative method has been introduced for impreg nating porce lain pots w ith antimicrobial silver nanoparticles. Silver nanoparticle s were pro duced by reducing silver nitrate with hydra zine. Particles were t hen impregnated in p orcelain pottery using a pervaporation technique. The re sulting pots were characterized usi ng SEM, ED X, XRD and AFM analyses. Antib acterial pro erties of the pottery w ere confirm ed by the exposure to broth conta ining Escherichia coli and Staphylococcus aur eus , however the beneficial effects of the po ts on gram-negative (Es cherichia c oli) bacteria, compared to gram-positive (Staph ylococcus au reus) bacteria, were ob served. This finding is attributed to the thicker Staph ylococcus aureus membrane compared to thin ner membrane of Esch erichia coli. Moreover, the higher silver particle content of the sample s led to a stronger antiba cterial property.

کلیدواژه ها:

Silver nanoparticles ، Pervaporation ، Escherichia coli ، Staphylococcus aureus