In this work, the synthesis method and applications of nanocomposite polymer stabilized silver nanoparticles (AgNPs) are reported. 3-Aminophenyl boronic acid (3APBA) was used as a reductant of silver nitrate which acted as an oxidant for the polymerization of 3APBA through in situ chemical oxidative polymerization to poly(3-aminophenyl boronic acid) or PABA. The formation of PABA in the reaction mixture led to particle agglomeration owing to PABA poor solubility. However, in the presence of hydrophilic poly(vinyl alcohol) (PVA), PABA binds to the free hydroxyl group of PVA to form a composite polymer (PABA-PVA), which perfectly stabilized the formed AgNPs. Succinctly, PVA acted as a solubilizer and stabilizer for (PABA-PVA)AgNPs synthesis. Synthesis was optimized and sharp absorption peaks at 290 nm and 426 nm were observed, attributing to the π-π* transition of the benzenoid ring of PABA and the characteristic absorption spectrum of AgNPs, respectively. (PABA-PVA)AgNPs was characterized using UV–vis, TEM, FESEM, EDX, XRD, FTIR, TGA/DTG, DLS and zeta potential analysis. In addition, the antibacterial, antioxidant and metal chelating capacities of (PABA-PVA)AgNPs were evaluated. The (PABA-PVA)AgNPs exhibited significant antibacterial activity against Escherichia coli and Listeria monocytogenes, and good antioxidant and metal chelating properties of (PABA-PVA)AgNPs, thus validating its attractive biological applications.

在这项工作中，报道了纳米复合聚合物稳定的银纳米粒子（AgNPs）的合成方法和应用。3-氨基苯基硼酸（3APBA）作为硝酸银的还原剂，硝酸银作为氧化剂用于原位聚合3APBA化学氧化聚合成聚（3-氨基苯基硼酸）或 PABA。由于 PABA 溶解性差，反应混合物中 PABA 的形成导致颗粒团聚。然而，在亲水性聚乙烯醇 (PVA) 存在下，PABA 与 PVA 的游离羟基结合形成复合聚合物 (PABA-PVA)，从而完美地稳定了形成的 AgNPs。简而言之，PVA 作为（PABA-PVA）AgNPs 合成的增溶剂和稳定剂。合成得到优化，在 290 nm 和 426 nm 处观察到尖锐的吸收峰，分别归因于 PABA 苯环的 π-π* 跃迁和 AgNPs 的特征吸收光谱。(PABA-PVA)AgNPs 使用 UV-vis、TEM、FESEM、EDX、XRD、FTIR、TGA/DTG、DLS 和 zeta 电位分析进行表征。此外，抗菌、评估了（PABA-PVA）AgNPs的抗氧化和金属螯合能力。(PABA-PVA)AgNPs 表现出显着的抗菌活性大肠杆菌和单核细胞增生李斯特菌，以及 (PABA-PVA)AgNPs 良好的抗氧化和金属螯合特性，从而验证了其有吸引力的生物学应用。