Silver nanoparticles (AgNPs) exhibit broad spectrum antibacterial effect, but their cores after use can persist in the environment, which presents a toxic effect on humans. To address this issue, silver-based biomaterials are regarded as green alternatives to AgNPs. In this study, we used kraft lignin, a green and biodegradable polymer derived from wood biomass, to prepare an aminated lignin-silver complex (Ag@AL complex) as an alternative antibacterial agent. A facile approach for preparing aminated lignin (AL) was realized by the amination of kraft lignin using 2-chloroethylamine hydrochloride in water solvent. The nitrogen content of optimized AL was 4.37 %. Ag(Ⅰ) could be captured and reduced to metallic Ag(0) by AL, thereby forming AgNPs on the surface of AL. Importantly, the obtained Ag@AL complex was proven to be an effective antibacterial agent against gram-positive (Bacillus cereus, Staphylococcus aureus) and gram-negative (Salmonella enterica) bacteria.

银纳米粒子 (AgNPs) 具有广谱抗菌作用，但其核心在使用后会在环境中持续存在，这对人类具有毒性作用。为了解决这个问题，银基生物材料被认为是 AgNPs 的绿色替代品。在这项研究中，我们使用牛皮纸木质素（一种源自木材生物质的绿色可生物降解聚合物）制备胺化木质素-银复合物（Ag@AL 复合物）作为替代抗菌剂。通过在水溶剂中使用 2-氯乙胺盐酸盐对硫酸盐木质素进行胺化，实现了制备胺化木质素 (AL) 的简便方法。优化后的 AL 的氮含量为 4.37%。Ag(Ⅰ)可以被AL捕获并还原成金属Ag(0)，从而在AL表面形成AgNPs。重要的，蜡样芽孢杆菌、金黄色葡萄球菌）和革兰氏阴性（肠沙门氏菌）细菌。