Quarterly Scientific-Research Goljaam

tensile strength. Moreover, making wool fabrics antibacterial is a considerable task for protection of fabrics and consumers against microbial attack and growth. In this research nano-silver was synthesized using reduction of silver nitrate by sodium bisulfite along with increasing the fiber fineness using tensile. This process was successfully introduced Iranian coarse wool yarns with loading of nano-silver through in situ synthesis and consequently, suitable antibacterial properties along with some other improved properties such as yarn tenacity and improvement of yarn count were obtained. Subsequently, SEM and EDX analyses confirmed the nano-silver synthesis on the wool yarns and indicated the importance of test conditions on antibacterial properties of the fibers.

 Today, the use of enzymes and antibacterial protein fibers is greatly favored by researchers to protect textile against microbial attacks, spots, discoloration and to increase shelf life of silk carpets in museums. This study investigates the effect of protease and nanosilver on silk yarn. Silk yarn with 140 Tex as a carpet pile treated with protease and nanosilver in different conditions and their antimicrobial properties against two bacteria, i.e. Escherichia coli and Staphylococcus aureus was studied and compared. Also, some characteristics of products including weight loss, whiteness index and color indices, have been investigated in SEM images. Using nanosilver alone showed excellent antimicrobial properties against microbes with different concentrations while reduced the whiteness of silk yarn. However, using 2% protease led to enhanced antibacterial properties, and whiteness. On these bases, concurrent use of protease and 30 ppm of nanosilver produced silk yarn with excellent antibacterial properties i.e. 100% bacterial reduction.