Production of polyvinyl alcohol-hydroxy propyl methylcellulose composites containing silver nanoparticles and investigating its physicochemical and antimicrobial properties.
Packing is a necessary steps to preserve the organoleptic, nutritional and Sanitary properties of food from production to consumption. Accumulation of irresolvable synthetic material Especially different types of packaging materials in nature In recent years has caused in recent years the use of biodegradable polymers strongly considered. In this study, possibility of Production of combining PVA and HPMC and their properties were studied. Finally, nano-composite films based on 80% PVA, and 20% HPMC contenting of the 1000, 2000 and 4000 ppm nanosilver were produced. Then characterization such as tensile, water vapor permeability, water uptake and were addition of Hydroxy Propyl Methyl Cellulose Improve the properties of films such as decrease water uptake, water vapor permeability and increase their strength and tensile strength. By addition of 2000 ppm nano silver to the film in some cases such as water vapor permeability, tensile strength, Young's modulus there was no Significant differenc e between the films with and without nano-silver. The nanocomposite films with high concentrations of nano-silver (4000 ppm) decrease the Young's modulus and tensile strength, In other words, leads to weakening the produced films. At high concentrations of nano-silver water vapor permeability increased. The antibacterial properties of nanocomposite films were evaluated by measuring the diameter of inhibition zone in a disk diffusion test against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and Bacillus cereus (B. cereus).
Food Science and Technology, Volume:13 Issue:8, 2016
229 - 241  
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