甘油分散含银溶胶的制备及抑菌性能研究
发布时间：2019-02-28 15:19
【摘要】：以AgNO_3为银源,无水甘油作为还原剂和分散介质,PVP-K30为稳定剂和模板剂,首次以加热搅拌法一步制备了含纳米银的无水甘油溶胶。以紫外-可见吸收光谱、X射线粉末衍射、透射电子显微镜等手段对所得溶胶和溶胶中的纳米银颗粒进行表征,考察了AgNO_3加入量、反应时间等因素对纳米银溶胶和银单质形貌的影响。结果表明,当投料质量比(m(甘油)∶m(AgNO_3)∶m(PVP-K30))为200∶(0.5~1.5)∶5,反应温度为110℃,反应时间为0.5~3h,可以获得稳定的纳米银甘油溶胶,其中银单质的颗粒分散性好,形貌近球形,粒径为纳米级别。以大肠杆菌、金黄色葡萄球菌、枯草芽孢杆菌和蜡样芽胞杆菌作为研究对象,对所得含银溶胶的抗菌性进行研究,发现钠米银溶胶对4种目标菌均有很好的抑菌性,其中对枯草芽孢杆菌抑菌效果最好,且溶胶中银单质粒径越小,抑菌效果越好。
[Abstract]:Using AgNO_3 as silver source, anhydrous glycerol as reducing agent and dispersion medium, PVP-K30 as stabilizer and template, anhydrous glycerol sol containing nano-silver was prepared by heating-stirring method for the first time. UV-vis absorption spectra, X-ray powder diffraction and transmission electron microscopy were used to characterize the sol and silver nanoparticles. The addition of AgNO_3 was investigated. The effects of reaction time and other factors on the morphology of silver sol and silver were investigated. The results show that stable nano-silver glycerol sol can be obtained when the mass ratio of (m (to glycerol): m (AgNO_3): m (PVP-K30 is 200: (0.5) 1. 5: 5, the reaction temperature is 110 鈩，
本文编号：2431919
[Abstract]:Using AgNO_3 as silver source, anhydrous glycerol as reducing agent and dispersion medium, PVP-K30 as stabilizer and template, anhydrous glycerol sol containing nano-silver was prepared by heating-stirring method for the first time. UV-vis absorption spectra, X-ray powder diffraction and transmission electron microscopy were used to characterize the sol and silver nanoparticles. The addition of AgNO_3 was investigated. The effects of reaction time and other factors on the morphology of silver sol and silver were investigated. The results show that stable nano-silver glycerol sol can be obtained when the mass ratio of (m (to glycerol): m (AgNO_3): m (PVP-K30 is 200: (0.5) 1. 5: 5, the reaction temperature is 110 鈩，
本文编号：2431919
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