Research on Hydrophobic Copper Foil Surfaces Prepared by Laser Ablation Imprinting
摘要
Laser ablation imprinting technology involves using laser ablation to induce shock waves in the plasma, replicating microstructures from a mold surface onto the workpiece to form primary microstructures. Simultaneously, the remelt layer formed by laser ablation creates secondary microstructures on the surface. Further modifications such as fluorination and aging treatments alter the chemical composition of the workpiece surface, reducing surface energy to enhance its hydrophobicity. This study investigates the effects of different numbers of impacts, energy densities, and mold cycles on the surface forming results of aluminum foil. At an energy level of 109.5 J/cm2, there was no significant difference in the surface forming effect of copper foil subjected to 3 to 7 impacts. Under conditions of 3 laser pulses, when the laser energy is below29 J/cm2, the copper foil workpiece cannot form complete multilevel microstructures. Within the range of 45.2–102.5 J/cm2, the formation of multilevel microstructures on the copper foil workpiece improves with increasing energy. However, within the range of 109.5—118.4 J/cm2, the workpiece experiences damage. The larger the mold cycle, the better the formation of multilevel microstructures produced by laser ablation imprinting. The effects of aging treatment and fluorination treatment on the workpiece were analyzed from three aspects: wettability, surface chemical composition, and surface morphology. The effects of aging treatment and fluorination treatment on the workpiece were analyzed from three aspects: wettability, surface chemical composition, and surface morphology. The experimental results indicate that under conditions where multilevel microstructures are uniformly formed on the workpiece surface, different variables have insignificant effects on the final contact angle.