铜复合金属材料抗菌特性试验研究

Experimental Study on Antibacterial Properties of Copper Composite Metal Materials

文章将大肠埃希氏菌作为试验菌种,采用平板计数法评价铜及铜复合金属材料的抗菌性能。试验中,将适宜稀释度的菌悬液分别滴加在空白样本(聚乙烯片)和实验样本(白铜片、磷铜片和铍青铜片)上接触培养一段时间,洗脱后将洗脱液涂布于平板上进行培养,并进行菌落计数,以研究铜合金材料的抗菌特性,探索铜合金抗菌材料在诸多领域的深入应用。结果表明,接触白铜、磷铜、铍青铜3种材料24 h,稀释10~5倍的菌液培养24 h后基本无菌落生长。试验结果显示,铜合金材料的平均抗菌率R≥99%,且材料中起主要抗菌作用的成分是铜。铜合金材料的抗菌率与纯铜材料的抗菌率相近,且结果均符合Ⅰ级抗细菌率标准,所以判断这三类铜合金材料均具有强抗菌效果。

In this study,Escherichia coli was used as the test strain,and the antibacterial properties of copper and copper-containing metal materials were evaluated by the plate counting method.In the experiment,by dropping bacterial suspensions with appropriate dilution on blank samples(polyethylene sheets)and experimental samples(white copper sheets,phosphorous copper sheets,and beryllium bronze sheets)for a period of time,the elution solution was coated on a flat plate for cultivation,and bacterial colony counting is conducted to study the antibacterial properties of copper alloy materials,in order to explore the in-depth application of copper alloy antibacterial materials in various fields of life.The results showed that after 24 hours of contact with white copper,phosphorous copper,and beryllium bronze materials in a diluted 105% bacterial solution,the bacterial growth was basically sterile.The experimental results showed that the average antibacterial rate of copper alloy materials was R≥99%,and the main antibacterial component in the materials was copper.The antibacterial rate of copper alloy materials is similar to that of pure copper metal,and the results meet the Class Ⅰ antibacterial rate standard.Therefore,it was judged that these three types of copper alloy materials have strong antibacterial effects.