Abstract:

The inorganic antibacterial agents were prepared with Maifanshi containing Ag⁺ and Zn²⁺ by liquid ion exchanging reaction in this paper.The antibacterial activities of the as-prepared Maifanshi antibacterial agents were examined by Bacteriastasis ratio, and the microstructures of it were characterized by XRD and SEM, and the durability of it were studied by Sustained-release method.The results show that the excellent antibacterial activities and long durability of Maifanshi antibacterial agents have been obtained by the reaction of 0.1 mol·L^-1 Ag⁺ and 2 mol·L^-1 Zn²⁺ with Medical stone powers in the solution of pH 8 for 4 h at 60℃.The reasons for causing the above results are that silver and zinc ions entering the framework of Maifanshi through ion exchanging and adsorption can be released slowly to kill bacteria.

Key words:

无机抗菌剂, 麦饭石, 抗菌性, 抗菌机理

摘要：

以麦饭石为载体、Ag⁺和Zn²⁺为抗菌离子，通过液相离子交换反应，制备载银锌的麦饭石无机抗菌剂。采用抑菌率对所得产物的抗菌性进行检测，采用XRD、SEM对产物的结构与形貌进行表征，并采用缓释法对产物的耐久性进行研究。实验结果表明：在反应时间为4 h，反应温度为60℃，Ag⁺和Zn²⁺浓度分别为0.1、2 mol·L^-1，pH值为8的条件下，制备的麦饭石抗菌剂具有优异抗菌性和耐久性。抗菌机理初步分析为通过离子交换或吸附进入麦饭石结构内的Ag⁺和Zn²⁺能从载体中持久缓慢地释放出来，与细菌细胞作用，杀灭细菌，从而保持该抗菌剂良好的抗菌能力。

关键词:

无机抗菌剂, 麦饭石, 抗菌性, 抗菌机理