材料期刊网

硼酸盐具有抑菌和抑藻性能,研究采用高温熔融法合成了以硼为抑菌因子的B2O3-SiO2-Na2O缓释抑菌剂.运用X射线衍射分析(XRD)、扫描电镜(SEM)及红外光谱(FTIR)表征抑菌剂的理化性能,采用电感耦合等离子体发射光谱仪(ICP-AES)测定缓释液中硼元素的浓度并分析抑菌剂的缓释特性,分别以大肠杆菌和金黄色葡萄球菌为受试细菌,以抑菌圈和抑菌率为指标评价药剂的抑菌效果.结果表明,抑菌剂均呈无定形非晶形态,内部[BO3]和[BO4]基团的含量不只与B2O3有关,也受SiO2的影响;随着B2O3含量的降低,抑菌剂表面结构逐渐致密,缓释速率降低.随着缓释液中硼浓度的升高,抑菌剂的抑菌作用增强,且对金黄色葡萄球菌的抑制效果优于大肠杆菌.其中B2O3含量为55wt％的B2O3-SiO2-Na2O缓释抑菌剂的抑菌效果最佳,这为硼系缓释抑菌剂的继续研究及工业化应用提供了参考依据.

High temperature melting method has been used to synthesize B2O3-SiO2-Na2O controlled-release antibacterial agent on account of the functions that borate can inhibit the growth of bacteria and algae.The new inhibitor,a solid agent with controlled-release capability in water,is different from those liquid and gaseous antibacterial agents.In this study,the physicochemical properties of the inhibitor were characterized by XRD,SEM and FTIR.The concentrations of boron in solution were determined by using ICP-AES to determine the release capability of the inhibitor.Moreover the experiments of inhibitory circle and inhibitory rate were carried out to evaluate the antibacterial effects of the inhibitor on Escherichia Coli and Staphylococcus Aureus.The results indicate that the inhibitors present amorphous structure,with the content of [BO3] and [BO4] groups in the internal structure being affected by the amounts and the ratio of B2O3 and SiO2.The agent surface is denser while the release rate decreases with the decrease of B2O3 amount.Furthermore,the antibacterial effect enhances with the increase of boron concentration.S.Aureus is more sensitive to the inhibitor than E.Coli.The inhibitor containing 55wt％ of B2O3 gets the best antibacterial effect,which exhibits better controlled-release than the others.The present results provide a reference for further research and industrial application of the antibacterial agent.further research and industrial application of the antibacterial agent.