| 引用本文: | 马占芳,隋铭皓,袁博杰,芦洪涛,王菁宇,吕艳宁,王禹静.季铵盐/纳米银灭活水中细菌效能研究[J].哈尔滨工业大学学报,2019,51(8):28.DOI:10.11918/j.issn.0367-6234.201811195 |
| MA Zhanfang,SUI Minghao,YUAN Bojie,LU Hongtao,WANG Jingyu,Lü Yanning,WANG Yujing.Inactivation efficacy of quaternized chitosan/silver nanoparticles to bacteria in water[J].Journal of Harbin Institute of Technology,2019,51(8):28.DOI:10.11918/j.issn.0367-6234.201811195 |
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| 摘要: |
| 为研发一种新型的水处理消毒材料,利用壳聚糖季铵盐对纳米银进行表面修饰,制备出具有复合抗菌能力、表面呈正电性的季铵盐/纳米银（QCS/nAg）抗菌材料.以大肠杆菌为主要目标细菌,以表面接近中性、负电性的纳米抗菌材料（聚乙烯吡咯烷酮/纳米银PVP/nAg、柠檬酸盐/纳米银Citrate/nAg）为参比,对QCS/nAg灭活水中细菌活性进行研究,并对QCS和nAg在QCS/nAg抗菌活性中的作用进行评价.此外,就抗菌剂投加量、pH和氯离子对QCS/nAg灭活大肠杆菌性能的影响进行研究.通过研究银离子的释放、QCS/nAg对细菌细胞的吸附和QCS/nAg对细菌细胞壁（膜）的破坏,对QCS/nAg抗菌机理进行初步讨论.结果表明:QCS/nAg成功合成且分散性良好,相比其他nAg抗菌材料灭活细菌效果更佳；QCS和nAg在QCS/nAg灭活细菌时发挥协同作用, QCS/nAg相比PVP/nAg,在nAg投加量以及抗水中氯离子干扰方面具有更强的优越性.QCS/nAg的抗菌机理在于强化了纳米颗粒对于细菌的吸附以及对细菌细胞壁（膜）的破坏. |
| 关键词: 季铵盐/纳米银 材料制备 抗菌性能 影响因素 |
| DOI：10.11918/j.issn.0367-6234.201811195 |
| 分类号:X703 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(2,1)；十二五国家重大水专项(2014ZX07405-3,7ZX07201001) |
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| Inactivation efficacy of quaternized chitosan/silver nanoparticles to bacteria in water |
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MA Zhanfang,SUI Minghao,YUAN Bojie,LU Hongtao,WANG Jingyu,Lü Yanning,WANG Yujing
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(State Key Laboratory of Pollution Control and Resource Reuse (Tongji University), Shanghai 200092, China)
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| Abstract: |
| In order to develop a new type of disinfection material for water treatment, a new kind of antibacterial material named quaternized chitosan/ silver nanoparticles (QCS/nAg) was prepared by using quaternized chitosan as a modifier of silver nanoparticles, which has synergetic effect and positively charged surface. To study the antibacterial performance of QCS/nAg, neutrally charged and negatively charged nanoparticles were used as comparison to inactivate bacteria, especially Escherichia coli, in water. The function of QCS and nAg in composite materials was evaluated. Furthermore, the antibacterial influencing factors such as material dosage, pH value, and chloride ions were studied. The antibacterial mechanism of QCS/nAg was concluded through studying the dissolution of QCS/nAg and the reaction between QCS/nAg and bacteria, including adsorption and damage of cell wall (cytomembrane). Results showed that QCS/nAg with high dispersibility was successfully synthesized and it performed better inactivation effect than other nAg. QCS and nAg showed synergetic effect in QCS/nAg when treated with bacteria. Compared with PVP/nAg, QCS/nAg exerted superiority in dosing quantity and resistance to interference of chloride ion. The antibacterial mechanism was summarized as that QCS/nAg strengthened the adsorption process of bacteria and the damage to the cell wall (cytomembrane). |
| Key words: QCS/nAg preparation antibacterial performance influencing factors |
