Study on the Interface Properties of CF / PEEK ‐Ti Fiber Metal Laminates Enhanced by Synergistic Action of Graphene Oxide and Multi‐Walled Carbon Nanotubes

ABSTRACT Fiber‐metal laminates (FMLs) have gained widespread application due to their excellent comprehensive properties. However, the issue of insufficient bonding strength at the fiber‐metal interface severely constrains their further utilization. To address this, this paper proposes the use of graphene oxide grafted multi‐walled carbon nanotubes (GO‐MWCNTs) as nano‐reinforcements to enhance the interfacial properties of carbon fiber‐reinforced polyether ether ketone‐titanium (CF/PEEK‐Ti) fiber‐metal laminates (FMLs). The study successfully prepared GO‐MWCNTs nanofillers by bridging carboxylated multi‐walled carbon nanotubes with graphene oxide via silane coupling agents, subsequently applying them to interface modification of CF/PEEK‐Ti FMLs. Experimental results demonstrate that incorporating 0.50 wt.% GO‐MWCNTs significantly enhances the composite's interfacial properties, with shear strength increasing by 32.86% and flexural stress rising by 126.79%, while also markedly improving thermal stability. This study not only validates the potential of GO‐MWCNTs as highly effective nano‐reinforcements but also provides novel strategies for designing high‐performance multi‐scale reinforced FMLs.