Spherical Nanoparticles

The main objective of the current research was to successfully employ the reducing and stabilizingfeatures of xanthan gum to synthesize nanosilver, then coating cotton fabrics with the net producednanosilver in order to obtain finished fabrics valuable in medical applications. Pre-hydrolyzed xanthangum was used to reduce Ag+ to Ag0 in nano size using a simple one-step rapid synthetic route. The reduc-tion step was followed up by measuring the concentration of reducing sugars eliminated in the reactionmedium. The optimum concentration of xanthan gum was 3 g/L to reduce 1 mmol/L Ag+, as 2.66 ± 0.4 g/Lwas the maximum concentration of reducing sugars obtained in the reaction. Transmission microscopeimages show that the AgNPs are spherical in shape with mean size 9.1 ± 4.8 nm. Cotton fabrics were thencoated with the produced AgNPs using pad-dry-cure method. Well dispersed layer from Ag0on cottonsurface was showed under electron microscope. The biocidal activities of the coated fabrics were testedagainst Staphylococcus aureus and showed excellent results for antibacterial even after 20 washing cycles.This method has the advantage of not necessitating aggressive conditions such as the presence of organicsolvents to produce durable antibacterial cotton fabrics