Investigation of Bacteriation Properties of Copper-Tin Nanocrystalline Alloys Produced by Mechanical Alloys

In the present study, antibacterial behavior of different alloys of Cu-83Sn, Cu-50Sn, Cu-35Sn prepared by mechanical alloying was investigated. A mixture of copper oxide - tin oxide and graphite was selected as the raw material for agglomerating and powdered mixtures with 130 rpm and a weighing ratio of 20 to 1 powder under argon atmosphere, about 40% of the additional graphite for the regeneration process The powder mixture was added and the milling time was selected from 10 minutes to 30 hours.
The results of the products were analyzed using SEM, XRD and DTA / TG ​​analyzes. Antibacterial tests of the samples were performed using O.D and CFU analysis. The results of SEM showed a reduction in the size of the crystalline material to nanoscale. The results of XRD showed that with increasing aging time up to 30 hours, the powder mixture was not reduced. For complete redaction of powder mixture at temperatures of 400, 700 and 1000 ° C, according to DTA analysis for heat treatment.
The results showed that the heat treatment at the temperatures of 400, 700 and 1000 ° C consists of SnCu, Cu2O, SnO2-CuO phases, respectively. In order to compare the various Cu-Sn alloys, metal pellets were also produced by the 10-hour agitation method. The results of antibacterial tests on the samples showed that by increasing the percentage of copper in the alloy, the antibacterial properties of the alloy improved, while the bacteria studied in this study was E. coli (Escherichia coli)