| 醋酸银真空浸渍制备杀菌功能载银活性炭及其表征 |
| 摘要点击 1637 全文点击 1494 投稿时间：2010-01-29 修订日期：2010-04-09 |
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| 中文关键词 真空浸渍 载银活性炭 载银量 抗菌 缓释 |
| 英文关键词 vacuum impregnation activated carbon-silver composite silver content antibacterial control release |
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| 中文摘要 |
| 通过醋酸银真空浸渍法制备了银缓释杀菌功能载银活性炭(Ag/AC)，研究了其对大肠杆菌(E. coil)的杀灭性能和抗银流失性能.以气体吸附仪测定活性炭的比表面积和孔结构，以扫描电子显微镜(SEM)观察Ag/AC表面形貌，以X射线衍射(XRD)考察Ag/AC晶体结构.结果表明，单质银均匀负载在活性炭表面.随着CH3COOAg浸渍浓度的增加，活性炭的载银量和银颗粒的粒径也随着增加，而比表面积、总孔容和平均孔径随之减少.当载银量为0.97%(质量分数)时，该法制备的Ag/AC在120 min内杀灭107CFU/mL浓度的E. coil，展示出与浸渍法制备的Ag/AC相近的杀菌活性；但在振荡30 d后，其银流失百分量仅为37.6%，抗银流失性能远高于浸渍法制备的Ag/AC.在保持较高杀菌活性前提下，可以实现银的缓释. |
| 英文摘要 |
| Activated carbon-silver composite(Ag/AC)for antibacterial performance by controlling silver release was prepared by silver acetate vacuum impregnation method. The antibacterial activity towards E. coil and resistance of water erosion was investigated through distilled water. Surface area and porosity analyzer, Scanning electron spectroscopy(SEM)and X-ray diffraction(XRD)were used to characterize the surface morphology and pore properties. The results show that Ag0 was deposited on AC symmetrically. The content of silver supported and particle size were increased by the increasing of the concentration of CH3COOAg, while specific surface area, total pore volume and average pore size were decreased. Ag/AC prepared with silver content of 0.97% which killed 107 CFU/mL concentration of E. coil in 120 min exhibited the similar antibacterial activity for E. coil with that prepared by traditional impregnation method. However, the silver loss of the Ag/AC prepared with silver content of 0.97% was 37.6%, showing much higher resistance to water erosion. High antibacterial activity and control silver release can be simultaneously realized by the silver acetate vacuum impregnation method. |
