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This study was aimed at improving the conventional cotton gauze for achieving advanced wound dressing specifications. Firstly, microcapsules of alginate (Alg-MC) were formed and silver nanoparticles (AgNPs) were synthesized in situ inside (Method I: Ag/Alg-MC) or on (Method II: Ag@Alg-MC) Alg-MC. A solution of chitosan (CS) containing already prepared povidone-iodine (PVP-I) was loaded with Ag/Alg-MC or with Ag@Alg-MC. Finally, conventional cotton gauze substrate was impregnated with these two prepared dispersions and dried. Both samples showed antibacterial properties against gram-negative (Escherichia coli) and gram-positive bacterium (Staphylococcus aureus). Their water absorbency, water holding capacity, and vertical wicking increased by 55, 28, and 33%, respectively, in comparison with the control sample. Ag@Alg-MC showed burst release in comparison with Ag/Alg-MC. The conventional properties of cotton gauze were greatly improved by the introduced method and it was regarded as a proper candid...

The aim of this study is to check the effect of different morphologies of silver nanoparticles such as spherical, polygonal, disk, prism, and hierarchical on antimicrobial characteristics of cotton fabrics. Nanosilver particles have been synthesized in different morphologies. Then, the colloid nanosilver particles were applied to the cotton fabric pieces for 25 ppm by ultrasonic method in ambient temperature. Silver nanoparticles solutions were characterized by UV–visible and infrared absorption spectroscopies, scanning and transmission electron microscopies as well as antimicrobial tests which ultimately showed that non-spherical morphologies such as polygonal, prism, and hierarchical like shapes in comparison with spherical and disc morphologies exhibited stronger growth inhibitory effect against gram-negative bacterium Escherichia coli and gram-positive Staphylococcus aureus after five replicate standard washing processes. In addition, among various tested morphologies, the hierarchical like morphology...