苯乙烯 - 马来酸酐无规共聚物/银纳米微粒的合成及表征

金属纳米材料能够产生量子尺寸效应及表面效应，在许多领域具有很好的应用前景.以DMF(N,N-二甲基甲酰胺)为溶剂及还原剂，苯乙烯-马来酸酐无规共聚物为大分子稳定剂，在不同的反应条件下，合成制备了银纳米微粒.通过紫外-可见吸收光谱、透射电子显微镜等测试手段对所合成的纳米银样品进行了表征.结果表明：通过上述反应所得到的银纳米微粒的DMF溶液可以在420 nm处出现纳米银所具有的特征吸收峰，增加了反应前驱体浓度及反应时间，使银纳米微粒的特征吸收峰变得更加明显.透射电子显微镜的结果表明，所得到的银纳米微粒具有较窄的尺寸分布，从而证明苯乙烯-马来酸酐无规共聚物可以对纳米银表面进行较好的修饰.

Synthesis and characterization of styrene-maleic anhydride copolymer/silver nanoparticles

Metal nanomaterials have shown better application potential in many fields due to their quantum size and surface effect.Silver nanoparticles were synthesized using DMF(N,N-dimethylformamide) as both solvent and reductant in styrene-maleic anhydride copolymer solution under different reaction conditions.UV-VIS absorption spectroscope and transmission electron microscope(TEM) were used to characterize the structure of the obtained silver nanoparticles.The results show that the silver nanoparticles in DMF solution can give an apparent surface absorption spectra located at 420nm,and the characteristic absorption peaks for silver nanoparticles will become stronger with increasing the concentration of silver precursor and reaction time.The TEM observations reveal that the obtained silver nanoparticles have a narrow size distribution.It indicates that the styrene-maleic anhydride copolymer can protect silver nanoparticles from aggregation under the present experimental conditions.