After metallization,polymer powder materials not only exhibit the appearance and hardness of metal,but are also easy to be weld and can sometimes be used as a substitute for metal products.Due to the low surface activity of in-active substrate materials(e.g.,plastics,glass,ceramics,etc.),there is a significant difference between their proper-ties and those of metals,so surface metallization cannot be achieved by physical deposition and adsorption alone.The preparation of PA12 composite powders with metal particles was realized by constructing activation sites in situ on the surface of nylon 12(PA12)powder,adsorbing catalyst particles and catalytic chemical plating,which elucidated the mechanism of adsorption of catalytic sites and catalytic chemical plating on the surface of PA12 powder.
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