Preparation and Interfacial Analysis of Ag/Cu Coating on Acrylonitrile Butadiene Styrene Surface by Chemical Etching and Self-assembly Modification

摘要

Surface metallization remains a promising approach for combining the unique properties of plastics and metals. To enhance the interfacial bonding of Ag/Cu coating on ABS substrate, a promising method combining chemical etching and self-assembly modification was proposed. The results showed that the adhesion strength of the Ag/Cu coating on ABS substrate was significantly improved to 6.71 N/cm. KMnO4 etching increased the -OH functional groups on the surface of ABS substrate, resulting in improved hydrophilicity. Specifically, the contact angle of distilled water decreased from 80.5 & DEG; to 12.5 & DEG; after 60 minutes of KMnO4 etching. The thiosilyl group of silane coupling agents hydrolyzed and condensed with -OH on the ABS surface, while the -SH end of silane coupling agents coupled with the silver film to form an S-Ag bond during the spray electroless plating process. This bond acts as a bridge between the substrate and the coating, thereby enhancing the adhesion strength of the coating. This study provides important theoretical and technical insights for the surface metallization of plastic.

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