الفهرس | Only 14 pages are availabe for public view |
Abstract Abstract An antibacterial agent, such as chitosan, was used in various concentrations. (0.5–4% o.w.s) and then measuring the nitrogen content to get the suitable concentration that contains the highest nitrogen content after application on cotton fabrics, where the result obtained showed the best concentration of chitosan is 2% o.w.s, followed by treatment of treated cotton fabric with a varied concentration of Nano Zinc Oxide (1–10% o.w.s), which showed by the Kirby Bauer disc diffusion method that the best concentration of Nano zinc oxide is 8%, which gives more inhibition zone. Then the treated cotton fabric the next step of treatment was done by treating the aforementioned samples with varied concentrations of nano silver (3-100 ppb), and the results obtained by using the Kirby Bauer disc diffusion method showed that the best concentration of nano silver is 100 ppb. Finally, we subjected both different samples of ZnO NPs or Ag NPs treated cotton fabrics to UV irradiation for 30 min on each sideand the end result revealed that the best concentration of ZnO NPs with UV was 8% o.w.s, and the best concentration for AgNO 3 NPs with UV was 100 ppb. In a parallel treatment for both different samples with ZnO NPs or Ag NPs treated cotton fabrics, different concentrations of Methylisothiazolinone (MIT) (50-100ppm) were used and the results were obtained. The Kirby Bauer disc diffusion method showed that the best concentration of MIT was 100 ppm, and the treatment of treated cotton fabric with a mixed optimum concentration of Nano zinc oxide, Nanosilver nitrate, and Methylisothiazolinone, the results obtained showed that the best mixing was treatment of treated cotton textile with 100 ppbNanosilver + 8%o.w.s Nano zinc oxide plus 100 ppm (MIT). The results found that for gram-negative bacteria (E. coli), the best result was achieved by using a mix (MIT 100 ppm plus chitosan 2% o.w.s plus Nano zinc oxide NPs 8% o.w.s plus Silver NPs 100 ppb). And for gram-positive bacteria (S.aureus), the best result was obtained by using a mix (MIT 100 ppm plus chitosan 2% o.w.s plus zinc oxide NPs 8% o.w.s plus silver NPs 100 ppb). An FT-IR spectrophotometer was used on products to illustrate chemical bonds that occurred during the different treatments and scanning electron microscope to show morphological change. Keywords and phrases: Chitosan, Nano silver, Nano zinc oxide, Methylisothiazolinone (MIT), UV – Grafting, Cotton, Antibacterial |