秸秆提取木质素还原制备银纳米颗粒及其抗菌水凝胶

张楼; 李硕; 唐馥; 张景凯; 康岳桐; 张鹤安; 李立东

doi:10.1007/s12613-024-2978-5

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 二校

Lou Zhang, Shuo Li, Fu Tang, Jingkai Zhang, Yuetong Kang, Hean Zhang, and Lidong Li, Preparation of silver nanoparticles through the reduction of straw-extracted lignin and its antibacterial hydrogel, Int. J. Miner. Metall. Mater.,(2024). https://doi.org/10.1007/s12613-024-2978-5

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Lou Zhang, Shuo Li, Fu Tang, Jingkai Zhang, Yuetong Kang, Hean Zhang, and Lidong Li, Preparation of silver nanoparticles through the reduction of straw-extracted lignin and its antibacterial hydrogel, Int. J. Miner. Metall. Mater.,(2024). https://doi.org/10.1007/s12613-024-2978-5

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秸秆提取木质素还原制备银纳米颗粒及其抗菌水凝胶

北京科技大学材料科学与工程学院, 新金属材料国家重点实验室, 北京 100083, 中国

通讯作者:
唐馥 E-mail: tangfu@ustb.edu.cn

文章亮点

(1) 从农业废弃秸秆中提取木质素并制得均匀分散的银纳米颗粒
(2) 制得银纳米颗粒溶液可促进室温下丙烯酰胺自由基聚合反应的快速引发
(3) 提出了一种简单快速且经济的方法制备抗菌水凝胶

中文摘要

银纳米颗粒由于具有优异的抗菌性能在生物材料制备领域广受关注。然而，化学还原法制备银纳米颗粒过程中使用的还原剂和稳定剂通常有一定的生物毒性，并易造成环境污染。本工作提出一种绿色环保、简单经济的方法制备银纳米颗粒，即以农业废弃秸秆的提取物作为还原剂和稳定剂，制得直径约为31.2 nm的银纳米颗粒。实验结果表明，该秸秆提取物中含有木质素成分。木质素结构中含有还原性的酚羟基和甲氧基，可将银氨溶液还原为银纳米颗粒。同时，由于木质素分子的吸附及包覆作用，所制备的银纳米颗粒表面呈负电性，有效降低了纳米颗粒的聚集，使其具有良好的分散性。此外，将制得的银纳米颗粒直接加入到丙烯酰胺预聚溶液中，可促进室温下自由基聚合反应的快速引发，形成掺杂了银纳米颗粒的聚丙烯酰胺复合水凝胶，此过程无需额外加热或紫外光照条件。由于银纳米颗粒的存在，该复合水凝胶表现出优异的抗菌性能，在伤口敷料等医用材料领域具有潜在应用价值。

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Research Article

Preparation of silver nanoparticles through the reduction of straw-extracted lignin and its antibacterial hydrogel

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Abstract

Abstract

Silver nanoparticles (Ag NPs) have attracted attention in the field of biomaterials due to their excellent antibacterial property. However, the reducing and stabilizing agents used for the chemical reduction of Ag NPs are usually toxic and may cause water pollution. In this work, Ag NPs (31.2 nm in diameter) were prepared using the extract of straw, an agricultural waste, as the reducing and stabilizing agent. Experimental analysis revealed that the straw extract contained lignin, the structure of which possesses phenolic hydroxyl and methoxy groups that facilitate the reduction of silver salts into Ag NPs. The surfaces of Ag NPs were negatively charged due to the encapsulation of a thin layer of lignin molecules that prevented their aggregation. After the prepared Ag NPs were added to the precursor solution of acrylamide, free radical polymerization was triggered without the need for extra heating or light irradiation, resulting in the rapid formation of an Ag NP–polyacrylamide composite hydrogel. The inhibition zone test proved that the composite hydrogel possessed excellent antibacterial ability due to the presence of Ag NPs. The prepared hydrogel may have potential applications in the fabrication of biomedical materials, such as antibacterial dressings.
- silver nanoparticles;
- hydrogel;
- straw;
- extraction;
- antibacterial

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