Graphene‐Assisted Ni Electrodeposition on Ultra‐High Molecular Weight Polyethylene for Enhanced Tribological Performance

Ultra‐high molecular weight polyethylene (UHMWPE) possesses excellent wear resistance and low friction but suffers from poor metal adhesion due to its low surface energy and chemical inertness. Herein, a graphene‐mediated electroplating strategy is developed to enable dense and adherent Ni coatings on UHMWPE. The graphene interlayer enhances interfacial conductivity, promotes uniform Ni nucleation, and suppresses oxidation. Systematic optimization of NaCl concentration, current density, and plating time identifies current density as the dominant factor. Under optimal conditions, a compact 224 μm Ni layer yields a 37.9% reduction in friction coefficient. This work demonstrates an effective graphene‐assisted metallization route for inert polymers, offering a pathway toward robust, low‐friction engineering interfaces.