Facile preparation of magnetic coatings on polyester filament surfaces via 3D printing and investigation of their microstructure and properties
摘要
Polyester filaments, as flexible substrates, hold significant application value in the textile and flexible electronics industries. In this study, additive manufacturing technology was combined with traditional electroplating to develop a direct-write chemical deposition method. By controlling the microdroplet movement speed and the number of deposition passes via CNC programming, the method achieved the controlled preparation of nickel coatings on polyester filament surfaces. The results indicate that reducing the microdroplet movement speed and increasing the number of deposition passes help improve the structural continuity of the coating and optimize defect distribution, thereby promoting grain growth and refining the crystal structure, which effectively enhances the overall performance of the coating. At a microdroplet movement speed of 10 mm/min and five passes, the samples maintained low resistance (20–35 Ω) after 100 bending cycles, demonstrating excellent conductive stability. Additionally, the coating exhibited a low corrosion current density (0.21172 µA/cm2) in a 3.5 wt.% NaCl solution, with both weight and electrical conductivity maintaining good stability. This study achieved synergistic control over the structure and properties of nickel coatings on polyester filament surfaces, providing new technical methods and theoretical foundations for the fabrication of flexible conductive fabrics and smart textile materials.