席夫碱
聚氨酯
配体(生物化学)
银纳米粒子
原位
材料科学
纳米颗粒
基础(拓扑)
高分子化学
化学工程
抗菌活性
化学
色散(光学)
纳米技术
复合材料
有机化学
细菌
工程类
受体
数学分析
物理
光学
生物
生物化学
遗传学
数学
作者
Abbas Mohammadi,Amir Hossein Doctorsafaei,Saeed Beigi Burujeny,Hadi Amiri Rudbari,Nazanin Kordestani,Seyed Ahmad Ayati Najafabadi
标识
DOI:10.1016/j.cej.2019.122776
摘要
Abstract In this study, as a novel strategy to overcome gel formation and coagulation problem of waterborne polyurethane (WPU) dispersions containing silver ions, a Schiff base ligand (SBL) derived from 2,4-dihydroxybenzaldehyde and Bis(3-aminopropyl)amine was synthesized and utilized as chain extender in fabrication of WPUs. The effect of SBL incorporation into WPU chains and subsequent complex formation with Ag ions on the storage stability and particle size of the dispersions were studied. The UV–vis spectroscopy results of prepared dispersions confirmed the formation of Ag NPs within the WPUL/Ag sample through in situ reduction of Ag ions by PTMG (polytetramethylene glycol) polyol as a non-toxic reducing agent. Transmission electron microscopy (TEM) images of WPUL/Ag dispersion demonstrated that the formed Ag NPs exhibited a spherical shape with a size below 10 nm. Furthermore, X-ray diffraction (XRD) analysis of WPUL/Ag film affirmed the presence of Ag NPs within the WPUL matrix. Scanning electron microscopy (SEM) photographs of WPUL/Ag film also displayed a homogeneous dispersion for in situ formed Ag NPs. Antibacterial assays showed an excellent activity for WPUL/Ag film against S. aureus and P. aeruginosa bacteria. Besides, in vitro cytotoxicity studies confirmed that the WPUL/Ag sample possess a good biocompatibility toward L929 cells.
科研通智能强力驱动
Strongly Powered by AbleSci AI