Coating of silver nanoparticles on the polymeric film by corona discharge

Abstract

Summary form only given. In this work, the preparation of an antibacterial polyethylene film for using in food packaging was studied. Silver nanoparticles were used, because of their antibacterial property. For this purpose, a colloidal solution of silver nanoparticles was synthesized by chemical reduction of silver slat using fructose as a reducing agent. The absorption spectra of silver nanoparticles prepared by the proposed technique showed an absorption maximum at 410–420 nm in UV-Vis spectrometry, which is a typical absorption band of spherical silver nanoparticles. The morphology of silver nanoparticles was characterized by high resolution FE-SEM which showed the formation of silver particles in thenano form. Corona discharge was used to make a polar surface to increase the adhesion between the surface of polymer film and silver nanoparticles. Then silver nanoparticles were coated on the surface of low density polyethylene films. Surface properties of the fabricated films were characterized by AFM and FESEM analysis. Besides, an antibacterial test like as agar diffusion test was performed against Escherichia coli(E.coli) as a gram negative bacterium and Staphylococcus aureus(S.aureus) as a gram positive bacterium, and the growth of bacteria was measured. The results indicated that the prepared antibacterial film exhibit promising results against E. coli and S. aureus.