Characterization and mechanical testing of polydopamine-adhered electroless copper films

摘要: Abstract Self-assembling polydopamine has shown great versatility as a multifunctional surface coating. This study investigates the adhesive properties of used to bind electroless copper films several polymer substrates widely for commercial applications, including polyethylene (PE), polycarbonate (PC), poly(methyl methacrylate) (PMMA), and nylon 6,6. Each substrate was coated in similar manner resulting continuous 52 ± 12 nm thickness. Transmission electron microscopy revealed non-preferential polycrystalline microstructure grains averaging 53 ± 17 nm diameter with range 21 nm 123 nm, indicating there is some overlap film. Peel testing, tensile tests, tribological oscillating wear tests were characterize mechanical performance adhered films. The had highest peel strength, 49 ± 5 mN/mm, while remaining ranged from 5 13 mN/mm on average. Coated strained up 20% strain investigate film delamination, buckling, rupture. Transverse buckling relative direction observed due Poisson's effect during tension. Films resisted rupture strain, whereas other below strain. Tribological testing that coefficient friction governed by not dependent upon or As demonstration robust nature this method, suture polydopamine-adhered tied knot show large complex deformation state without showing signs delamination.