The formation of silver nanoparticles in solutions of sodium salts of carboxymethyl starch

The possibility of obtaining a biodegradable bactericidal composition containing silver nanoparticles by the reduction of silver ions using sodium carboxymethyl starch and UV irradiation has been investigated in this work. It is shown that the degree increase of substitution of carboxymethyl groups in NaCMS leads to an intensity increase of absorption of the surface plasma resonance bands of AgNP and an intensification of the Ag+ reduction process to Ag0. The intensity of the emerging Ag peak shows a complete reduction of Ag+ to Ag0 and the effectiveness of CMS in stabilizing the resulting AgNP. The results obtained from the EDX spectrum, together with the results of the SEM images, are strong evidence for the formation of AgNP nanoparticles and indicate the long-term colloidal stability of the product. It is shown that the processed nanocomposite solution AgCMS hosiery and non-woven materials have high antibacterial activity.