浸渍吸附法制备Ag-SiO_2纳米复合抗菌材料的条件优化  

Preparation and Optimization of Ag-SiO_2 Nano Composite Antibacterial Materials by Dip and Absorption Method

作　　者：万佶芃 胡艳玲[2] 唐晓宁[1] 张彬[2] 李艺景 雷荣杰 WAN Ji-peng;HU Yan-ling;TANG Xiao-ning;ZHANG Bin;LI Yi-jing;LEI Rong-jie(Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, China;Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China)

机构地区：[1]昆明理工大学化学工程学院,昆明650500 [2]昆明理工大学理学院,昆明650500

出　　处：《人工晶体学报》2018年第12期2489-2497,2503,共10页Journal of Synthetic Crystals

基　　金：国家自然科学基金(21677010);昆明理工大学分析测试基金(2017T20030013)

摘　　要：运用浸渍吸附法制备了纳米级单分散Ag-SiO_2无机复合抗菌材料,结合响应曲面方法,考察了Ag^+浓度、反应时间和氨水添加量等因素对材料抗菌率的影响,考虑到材料制备成本,变色控制等多方面因素,选取了最优制备条件,实验结果表明:Ag^+浓度为5. 9×10-4mol·L^(-1),氨水添加量为4. 1 m L,反应时间为5. 2 h时,材料有最佳的经济效益和抗菌性能,抗菌率达到91. 7%。通过TEM、XRD、ICP和BET方法对材料的结构进行表征,结果表明:载体SiO_2微球为无定形态; Ag-SiO_2抗菌材料微球具有良好的分散性和稳定性,粒径尺寸均匀; Ag+成功负载于SiO_2微球表面,负载量为8. 10 mg·kg-1。Nanoscale monodisperse Ag-SiO2 inorganic composite antibacterial materials were prepared by dip and absorption, and the effect of three factors: Ag + load concentration, reaction time and amount of ammonia additive on antibacterial rate were investigated through the response surface, meanwhile, the optimal preparation conditions were determined by factors of preparation cost and color. Select the spread plate method, Escherichia coli as antibacterial, and antibacterial testing. The result shows that optimum bactericidal conditions of composite antibacterial materials for the concentrations of Ag + is 5.9×10^-4 mol·L^-1 , the reaction time is 5.2 h, ammonia was at 4.1 mL addition level. The three factor of controlling the load is the best condition, antibacterial rate of antibacterial material is 91.7%, remarkable germicidal efficacy. The materials were characterized by TEM, XRD, ICP and BET, the results show that amorphous state of SiO2, excellent dispersibility and stability of Ag-SiO2 microspheres, uniform size, Ag + has successfully loaded. The optimum sample loading amount was 8.10 mg·kg^-1 .

关 键 词：纳米二氧化硅 银 复合材料 抗菌 

分 类 号：TB383[一般工业技术—材料科学与工程]