ABSTRACT

In this investigation, silver nano-particles (AgNPs) were coated on the surface of the Eichhornia crassipes fiber (ECF) by single-step hydrothermal method. The coating of AgNPs on the external layer of the ECFs was confirmed through the TGA, SEM, EDX and XRD analysis. The results of thermo gravimetric analysis revealed that thermal stability and maximum degradation temperature of the 6 mM AgNO₃ treated ECF was higher than the raw, NaOH treated and other AgNO₃ (2 mM, 4 mM, 8mM and 10 mM) treated ECF. Scanning electron scope and energy dispersive X-ray spectroscopy analysis proved the presence of AgNPs on the surface of the fiber with the average particle size of 93 nm. FTIR analysis demonstrated the involvement of OH groups of ECF in AgNPs generation process. XRD analysis displayed the corresponding peaks of silver nanoparticles (AgNPs) and silver oxide nano-particles (Ag₂ONPs) in the 6 mM AgNO₃ treated ECF. Antibacterial test outcomes proved the antibacterial nature of AgNPs coated ECF. All the above findings concluded that AgNPs coated ECF were suitable reinforcement in bio-films used for the medical and food packaging.

摘要

在这项研究中，银纳米粒子（AgNPs）通过一步水热法涂覆在凤眼莲纤维（ECF）的表面。通过 TGA、SEM、EDX 和 XRD 分析证实了 ECF 外层上的 AgNPs 涂层。热重分析结果表明，经 6 mM AgNO ₃处理的 ECF 的热稳定性和最大降解温度均高于原始、NaOH 处理和其他 AgNO ₃（2 mM、4 mM、8mM 和 10 mM）处理的 ECF。扫描电子显微镜和能量色散X射线光谱分析证明AgNPs存在于纤维表面，平均粒径为93 nm。FTIR 分析表明 ECF 的 OH 基团参与了 AgNPs 的生成过程。XRD 分析显示在 6 mM AgNO ₃处理的 ECF中银纳米粒子 (AgNPs) 和氧化银纳米粒子 (Ag _{2 ONPs) 的相应峰。}抗菌测试结果证明了 AgNPs 涂层 ECF 的抗菌特性。所有上述发现得出结论，AgNPs 涂层 ECF 是用于医疗和食品包装的生物膜的合适增强材料。