非水溶剂法制备纳米铜粉

Synthesis of nano-sized copper powder by non-aqueous solvent method

研究了以甘油作为还原剂，聚乙烯吡咯烷酮（PVP）作为分散剂，在液相甘油体系中还原醋酸铜（或氧化铜、氢氧化铜）制备纳米铜粉的方法。通过实验探索得到了最佳制备工艺条件：50mL甘油体系中加入适量铜盐并使铜盐和甘油的物质的量比达到1：40、同时加入分散剂PVP0．4～0．6g，控制温度为475～505K，快速搅拌反应50～60min。所得产物通过化学分析，粉末X射线衍射（XRD）、透射电镜（TEM）表征，结果表明产物铜粉纯度比较高，粒径符合纳米材料的要求，并且粒子呈球型分布。

Method of producing nano-sized copper powder by liquid phase reduction method with copper acetate （ or copper oxide and copper hydroxide） as raw material,liquid glycerol as reducing agent and polyvinylpyrrolidone （PVP） as dispersant was researched. Optimum process conditions were determined by experiments：add proper copper salt into 50 mL liquid glycerol system and keep the amount-of-substance ratio of copper salt to glycerol at 1 ： 40, and add dispersant 0.4 0.6 g PVP simuhaneously, then control the temperature at 475 - 505 K, with rapid agitation for 50 ~ 60 min. Prepared product was characterized by chemical analysis, XRD, and TEM. Results indicated that the product was high purity copper powder,and the particles were spherical while their size was able to meet the nano-sized material＇s requirement.