Coating Fine Copper Powder with Polyaniline

To improve the stability of fine copper powder, three methods were tried to coat it with polyaniline. Pretreated, the powder was put into aniline solution. As ammonium persulfate solution was added slowly, aniline changed into polyaniline and coated on copper powder. It is proved that one of the methods is effective and can form good core‐shell structure. The shell of the composite contains reduced undoped polyaniline and a little cuprous oxide. The composite has four stages of degradation in nitrogen and is more stable than fine copper powder in air.

Keywords:

• Fine copper powder
• polyaniline film
• coating