摘要
采用液相还原法,以聚乙烯吡咯烷酮(PVP)为保护剂,水合肼直接还原硝酸银溶液得到稳定分散的纳米银溶胶,并通过冷冻(-20℃)、解冻(20℃)法合成了物理交联的Ag/PVP/PVA水凝胶。利用透射电子显微镜(TEM)、紫外可见光谱(UV-vis)、X射线衍射(XRD)以及红外分析(FT-IR)对制备的复合材料进行了表征,以大肠杆菌为细菌模型测试了样品的抗菌性能并分析了抗菌原理。结果表明,所得银溶胶中纳米银平均粒径约为50 nm,由于纳米银的引入,该新型水凝胶具有抗菌性能,是一种具有开发前景的复合材料。
Nanometer silver colloid were synthesized from AgNO3 by chemical reduction in the liquid phase with hydrazine hydrate as the reducing agent, polyvinyl pyrrolidone（PVP） as the pfotective agents, and physically crosslinked nanometer silver/polyvinylpyrrolidone/polyvinyl alcohol （Ag/PVP/PVA） hydrogels were synthesized by freezing at -20 ℃ and thawing at 20 ℃. The product was characterized by transmission electron microscopy （TEM）, UV-vis spectrophotometer（UV-vis）, X-ray diffraction（XRD） and fourier transform infrared spectroscopy （FT-IR）, the antimicrobial mechanism and property were investigated by escherichia coli as a model in this work. And the results show that nanosilver particles are about 50 nm in size, the hydrogels held antibacterial properties for the presence of silver nanocomposites, is a prospective biology material.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2009年第11期149-151,共3页
Polymer Materials Science & Engineering
基金
福建省重大科研项目(2002H002)
福建省新材料与器件重大专题(2004HZ-3)
福建省科技重大专项(2007HZ0001-3)资助
关键词
纳米银
物理交联
水凝胶
抗菌性能
nanometer silver
physical cross-linking
hydrogels
antibacterial property
