In this project, Ethyl chloroacetate was first prepared by the reaction between chloroacetic acid and ethanol, and the FT-IR spectrum confirms the production of this ester.Then by reaction of ethyl chloroacetate and methyl imidazole,([EtMIM]) was synthesized. FT-IR and ¹H NMR spectra of the reaction mixture confirm the production of this ionic liquid. The reaction of chitosan with ionic liquid increases the solubility of chitosan at neutral pH. FT-IR, EDS and CHN spectra confirm the chemical modification of chitosan by ionic liquid. Because silver has antimicrobial properties, to increase the antimicrobial properties of chitosan, three samples of nanocomposites with different concentrations of silver nanoparticles compared to modified chitosan (2.5%, 5% and 7.5%) were prepared. We cut 0.3 g of cellulose fabric into a circle with a diameter of one centimeter and impregnated it with the prepared nanocomposites. The ATR, ICP, UV-Vis and XRD spectra confirm the presence of nanocomposites in cellulosic fabrics. For further comparison, bandages containing modified chitosan and pure chitosan were prepared. Disc diffusion method was used to eva‎luate the antimicrobial properties of the prepared bandages. The samples were placed next to the control sample (pure cellulose cloth) and incubated at 37 ° C for 24 hours. The result of microbial culture shows that pure cellulose fabric has no antimicrobial properties and the sample of 2.5% has the largest diameter of the inhibition zone. Also, the sample containing modified chitosan has relatively good antimicrobial properties.

مهران غياثي

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محمد ديناري، سياوش كاظمي