▎ 摘　　要

In this work, a meta-aramid (PMIA) substrate was pretreated by embedding a Ag catalyst, and an environmentally friendly ammonia-free silver plating bath was designed for electroless silver plating to fabricate a silver-plated material (PMIA-Ag). Furthermore, a graphene oxide/polyethylenimine (GO/PEI)(10) film was prepared via the layer-by-layer self-assembly technique. By implementing hydrophobic modification of heptadecafluorodecyltriethoxysilane (PFDS) on the film surface, a (GO/PEI)(10)-PFDS composite protective film was also fabricated. The results showed that PMIA-Ag prepared via the improved electroless plating technique had good electrical properties. The sheet resistance was 20-30 m omega/sq and the average electromagnetic shielding effectiveness was 68.23 dB in the frequency range of 30-3000 MHz. Moreover, the prepared (GO/PEI)(10)-PFDS composite protective film exhibited excellent anti-corrosion and anti-tarnish properties. The electrochemical data showed that the surface coverage of the protective film on the silver coating was 96.48%, while the corrosion inhibition efficiency on the silver coating reached 85.28%.