摘要
以L-抗坏血酸为还原剂,聚乙烯吡咯烷酮为保护剂,乙酸铜的二乙醇溶液为前驱体,在室温下反应得到大量粒径在160nm左右单分散性的纳米铜颗粒。详细探讨了聚乙烯吡咯烷酮的配比、乙酸铜溶液滴加速率和反应时间对产物的影响。采用扫描电镜、透射电镜、能谱分析仪和X射线衍射仪对纳米铜粉进行表征与分析,该纳米铜颗粒以近似球状的不规则形貌为主,晶型为面心立方(fcc)晶体结构,纯度较高,能够稳定分散在有机溶液中,适合制备导电铜浆,具有广阔的应用前景。
Metallic copper nanoparticles were prepared in ethylene glycol （EG） solvent at room temperature using L-ascorbic acid as reducing agent,poly（N-vinylpyrrolidone） as capping agent and copper acetate as precursor.The influences of PVP concentration,injection rate of cupric acetate and reaction time on the properties of resultant particles were investigated by scanning electron microscopy （SEM）,transmission electron microscopy （TEM）,energy dispersive spectroscopy （EDS） and X-ray diffraction （XRD）.It was found that spherical copper nanoparticles with high purify were obtained and confirmed to be a face-centered cubic （fcc） structure.They could be well-dispersed in organic solution which may be used for preparation of copper conductive inks,having extensive application market.
基金
广东省省部产学研结合项目专项资金(2011A090200017)
