【摘要】 采用溶胶凝胶法合成了银改性六方介孔硅(Ag-HMS)抗菌材料,以X-射线衍射(XRD)、红外(FT-IR)、固体紫外漫反射(UV-Vis)、环境扫描(ESEM)、电子能谱(EDS)、热重(TG-DTA)及N2的吸附脱附技术对材料结构和特性进行了分析,通过浊度值测定法考察了材料的抗菌性能。结果表明:Ag-HMS具有较好的热稳定性,银在材料中以骨架和非骨架态两种形式存在并且分散均匀。银的引入会导致六方介孔硅(HMS)载体材料的结晶度、介孔有序度、比表面积及平均孔径等的变化,模板剂及脱模温度对Si-O的红外吸收峰峰位及强度也有显著影响。抗菌实验表明:银改性六方介孔材料具有优良的抗菌性能,对金黄色葡萄球菌、芽孢杆菌、大肠杆菌及枯草杆菌的抗菌性能依次增强。抗菌剂质量浓度为0.20 mg/L时对枯草杆菌的生长可起到抑制作用;当其质量浓度为1.00 mg/L,12 h后即可实现对枯草杆菌的彻底杀灭。更多还原

【Abstract】 Antibacterial material of silver-containing hexagonal mesoporous silica(Ag-HMS) was synthesized using sol-gel method,and its structure and nature were characterized by means of XRD,FT-IR,UV-Vis,ESEM,EDS,TG-DTA and N2 absorption-desorption technique.The antibacterial ability of the material was also investigated using turbidimetric method.The results indicated that the Ag-HMS material was thermostable,the particles of silver were embed and evenly distributed in the framework/non-framework.The crystallinity,mesoporous ordered degree and specific surface area changed then silver particles were added into the material.Both the template agent and demoulding temperature had notable effect on the peak position and strength in IR spectra of Si-O.The results of antibacterial experiments showed that Ag-HMS had strong inhibition on bacterial.It had an increase order to inhibit Staphylococcus aureus,Gemma bacillus,Escherichia coli and Bacillus subtilis.When the dosage of Ag-HMS was 0.20 mg/L,the growth of B.subtilis was inhibited.B.subtilis was almost completely killed after 12 hours when the dosage of Ag-HMS was up to 1.00 mg/L.更多还原