A comparative study on the anti‐bacterial properties of three types of silver nano packaging based on (PLA, TiO2, PE) on Husinae Acipenseridae (Huso huso)

Abstract

Abstract Nanoparticles (NPs) in a variety of types are used in food packaging films. Ag NPs and Ag@TiO2 NPs were embedded in polyethylene (PE) and polylactic acid (PLA) based films in an effort to create unique films that would effectively extend the shelf life of beluga sturgeon fish. To achieve this, 22 films were formulated. Two of them were nominated based on an antibacterial evaluation. Pure PE and PLA were selected as control groups. TEM, SEM, FTIR, EDX, AFM, and tensile strength were employed to study the films chemically, physically, and mechanically. The films were used to package beluga sturgeon fish for 6 days, and then humidity, TVN, PV, and colony count were measured. According to the results, Ag@TiO2 NPs had higher antibacterial activity than AgNPs. Films with 3% of Ag@TiO2 NPs showed higher microorganism growth inhibition. The addition of Ag@TiO2 NPs increased the mechanical properties. Both selected films, controlled humidity (<70%), TVN (20 mg/100 g fish), and PV (<6 meq gr O2/kg fat) after 6 days. It was also confirmed that Ag@TiO2 NPs showed notable antibacterial activity after 6 days. The best results belonged to PE + 3% Ag@TiO2 film. To sum up, PE + 3% Ag@TiO2 film can be a good candidate for marine food packaging. Highlights Ag and Ag@TiO2 nanoparticles were studied on polyethylene and polylactic acid. This packaging reveals the favorable effect of Ag@TiO2. This packaging prolongs fish's shelf life under refrigeration. Ag@TiO2 increased both mechanical strength and barrier properties.

Keywords

• antibacterial activity
• food packaging
• nanotechnology
• silver nanoparticle