Production of nanosilver reinforced biodegradable polymer coating material obtained by green synthesis method

In many places in daily life, there are bacteria that are harmful to human health and can multiply very quickly under suitable conditions and can reproduce. Antibacterial coatings prevent the presence of bacteria and reproduction. It is a problem that the physical and chemical methods used in the production of antibacterial coatings create wastes harmful to the environment and human health, and the techniques used to remove these wastes are expensive and difficult to implement. In this thesis study, antibacterial silver nanoparticles (R-AgNP) with face-centered cubic and average particle size of 16 nm were obtained by green synthesis method using aromatic arugula plant. The obtained nanoparticles were characterized by UV-Vis, SEM, FT-IR, EDX and XRD methods, taking into account the appropriate storage and preservation methods for the analysis conditions. By using chitosan and alginate produced from biodegradable and edible sources, biodegradable polymer matrices were prepared in 4 different combinations. Tensile test, density measurement, humidity and swelling test of the obtained biodegradable polymer matrices were applied. Optical microscope and SEM characterization methods were used for internal structure analysis. Antibacterial properties were investigated by producing antibacterial biodegradable coating material by adding % 1, % 2.5 and % 5 previously prepared silver nanoparticles to the chitosan solution prepared at 45 °C, which had the best results in the tests. Solvent-casting method was used in the production of biodegradable coating material. After drying, tensile test, density measurement, moisture and swelling tests were applied to nanosilver doped biodegradable coating materials and they were characterized by optical microscope, SEM, FT-IR methods. Disc diffusion technique was used to detect antibacterial susceptibility. As a result of the study, the antibacterial activity increased as the addition of nanosilver to the chitosan biodegradable matrix at 45 °C increased.