银缓释载银杀菌活性炭的低温水热炭化法制备

发布时间：2018-12-17 04:05

【摘要】：采用低温水热炭化法制备了载银活性炭(Ag/AC),以大肠杆菌(E.coli)为实验菌种,考察了不同载银量活性炭的灭菌性能和抗银流失性能。利用X射线衍射(XRD)、扫描电子显微镜(SEM)以及低温液氮吸附对载银活性炭进行表征。结果表明,负载银对活性炭的石墨微晶结构无影响。随着载银量的增加,负载到活性炭上的银晶粒变大,比表面积、孔容积和孔径均变小,抗菌性能提高,银流失量变化不明显,抗流失天数增多。经分析,载银量为1.54%(质量分数)Ag/AC3样品,比表面积为813.35m2/g,100min之内杀灭107 CFU/mL的大肠杆菌,9d内银流失量约为2.9%,可见,在保持较高比表面积的基础上,具备良好的抗菌性能和抗银流失性能。
[Abstract]:Silver loaded activated carbon (Ag/AC) was prepared by hydrothermal carbonization at low temperature. The sterilizing properties and silver loss resistance of activated carbon loaded with different amounts of silver were investigated with Escherichia coli (E.coli) as experimental strain. Ag-loaded activated carbon was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and liquid nitrogen adsorption at low temperature. The results showed that the silver loading had no effect on the graphite microcrystalline structure of activated carbon. With the increase of the amount of silver loaded on the activated carbon, the silver grains increased, the specific surface area, pore volume and pore size decreased, the antibacterial property improved, the amount of silver loss did not change obviously, and the days of resistance to loss increased. The results showed that the silver content was 1.54% (mass fraction) of Ag/AC3 sample, and the specific surface area was 813.35 m2 / g ~ (-1) in 100 minutes to kill the Escherichia coli 107 CFU/mL, and the silver loss was about 2.9% in 9 days. On the basis of keeping high specific surface area, it has good antibacterial property and silver loss resistance.
【作者单位】：东北林业大学材料科学与工程学院;
【基金】：中央高校基本科研业务费专项资金资助项目(2572014EB01) 国家自然科学基金资助项目(31170545) 在校本科生国家创新实验资助项目(201410225012)
【分类号】：TQ424.1

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