超声条件下表面活性剂对水合肼还原制备纳米铜粉的影响

Effects of surfactants on hydrazine synthesis of nanocrystalline copper powders under ultrasonic condition

在超声条件下以五水硫酸铜为原料,水合肼为还原剂,加入适量的表面活性剂,制备纳米铜粉。研究了表面活性剂的用量、种类及协同使用对纳米铜粉的形貌、粒径及其分布的影响,并讨论了超声场的辅助作用效果。用SEM、TEM及XRD对纳米铜粉进行表征。结果表明:所制备的铜粉粒径可控,粒度分布窄,分散性良好且表面未氧化。

Preparation of dispersive nanocrystaUine copper powders by chemical reduction method under ultrasonic condition was investigated using copper sulfate as a raw material, hydrazine as a reductive agent and surfactants as modifiers. The effects of dosage and kind of surfactants on the shapes, sizes and size distributions of nanocrystalline copper powders were investigated.The ultrasonic effect was also discussed.The as-prepared particles were characterized by SEM, TEM and XRD. The results show that the shape of particles is spherical, particle size distribution is narrow, powder surface is unoxidized .