纳米银/聚多巴胺/纤维素纤维抗菌纸的两锅法原位制备的两锅法原位制备、表征及性能

Two-pot in situ preparation,characterization and performance of nano silver/polydopamine/cellulose fiber antibacterial paper

通过两锅法成功制得纳米银/聚多巴胺/纤维素纤维（nano Ag/PDA/CF）抗菌纸,此过程无需外加还原剂。扫描电镜（SEM）观察及能谱（EDX）分析表明,抗菌纸表面载有尺寸为70~150 nm球形或立方形纳米银粒子。X射线衍射（XRD）和热重（TGA）分析证明,纳米银粒子原位生成并沉积在聚多巴胺功能化的纤维素纤维表面。所制得的nanoAg/PDA/CF新型抗菌纸对金黄色葡萄球菌（Staphylococcus aureus）和大肠杆菌（Escherichia coli）均表现出显著的抗菌活性。nanoAg/PDA/CF复合纤维的最佳制备条件为：pH值8.5,多巴胺质量浓度125 mg/L,硝酸银质量浓度375 mg/L,多巴胺自聚合时间2 h,室温。

The nano silver/polydopamine/cellulose fiber（nanoAg/PDA/CF） antibacterial paper is successfully in situ prepared by the twopot method without using any additional reducing agent. The scanning electron microscopy（SEM） and the energy dispersive X- ray spectroscopy（EDX） analyses reveal that the spherical or cuboidal silver nanopartiles with the size of 70~150 nm are loaded on the surface of the nanoAg/PDA/CF antibacterial paper. The X-ray diffraction（XRD） and the thermogravimetric（TG） analyses confirm that the silver nanopartiles are in situ generated and deposited on the polydopamine functionalized cellulose fiber surface. The novel nanoAg/PDA/CF antibacterial paper shows a remarkable antibacterial feature against both S. aureus and E.coli. The optimum preparative conditions of the nanoAg/PDA/CF composite are： the pH value of 8.5, the dopamine concentration of 125 mg/L, the silver nitrate concentration of 375 mg/L,the dopamine self-polymerization time of 2 h, and the room temperature.