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Nanopackaging is one of the most significant subjects in food packaging And it is so important for food safety and food quality control, then we need natural method (without chemical material)for packaging process. In this study, the possibility of using nanocomposite (LDPE) based on silver nanoparticle as a food packaging was proposed. Chemical reduction method with Trisodium citrate as a reductant was applied for preparing silver nanoparticle. In the method mentioned using of diverse reducing agent can be produced different size of nanoparticles that having different antibacterial action. The nanostructure and particle size of of silvernanoparticles were confirmed by scanning electron microscopy(SEM). The average of particle size was 68 nm. After confirming the formation of nanoparticles, they were coated on the LDPE surface by melt mixing method. Surface morphology of the silver/LDPE nanocomposite was characterised by Transmission Electron Microscopy (TEM), Energy Dispersive X-ray (EDX) and X-ray Photoelectron Spectroscopy (XPS). The film thickness was 33.67nm. In addition, the antibacterial properties of the prepared nanocomposite film was evaluated by disc diffusion method. The results showed avourable antibacterial efficiency against Escheria Coli (ATCC 8739) and staphylococcus aureus(ATCC 6538) and The results show that the released silver from the coated film is enough to create antimicrobial activity in the incubated solution.

Synthesis of the Silver Nanoparticle by Chemical Reduction Method and Preparation of Nanocomposite based on AgNPS