用纳秒光纤激光加工结合表面活性剂调控的方式制备了(超)疏水/(超)亲水铝膜,研究了(超)疏水/(超)亲水铝膜表面的润湿性以及雾水收集实验。实验步骤如下:采用纳秒光纤激光钻孔技术加工微孔阵列于35 μm厚的铝箔上;在底部铝膜表面喷涂Glaco涂层试剂两三次,Glaco试剂中的疏水二氧化硅颗粒黏附在其表面,以改变铝膜表面的润湿性;通过激光二次扫描获得(超)疏水/(超)亲水铝膜。保持通孔量一致,研究了不同孔径下(超)疏水/(超)亲水铝膜的润湿状态、液滴渗透情况以及最佳的雾水收集孔径。结果表明:通孔量一致时,孔径的不同影响(超)疏水/(超)亲水铝膜的润湿状态和水滴的渗透时间以及雾水收集的功能,(超)疏水/(超)亲水铝膜的最佳雾水收集孔径为108 μm,其雾水收集量高达最低雾水收集量的31.3倍左右。

Herein, (super) hydrophobic/(super) hydrophilic aluminum membranes were fabricated by nanosecond fiber laser processing combined with surfactant control. Further, the wettability and fog collection characteristics of the fabricated (super) hydrophobic/(super) hydrophilic aluminum membranes were studied. First, a microporous array was fabricated on 35-μm-thick aluminum foil using the nanosecond fiber laser drilling technology. Then, the bottom surface of the aluminum membrane was sprayed with Glaco coating reagent two-three times. Hydrophobic silica particles in the reagent adhered to the surface, thereby changing the wettability of the aluminum membrane surface. Finally, a (super) hydrophobic/(super) hydrophilic aluminum membrane was obtained using laser secondary scanning. The (super) hydrophobic/(super) hydrophilic aluminum membrane was examined for wettability, droplet penetration, and optimum fog collection aperture with varying pore sizes and the same through-hole quantity. Results showed that the pore size affected the wettability of aluminum membrane to water, infiltration time of water droplets, and function of fog collection in aluminum foil membranes with the same through-hole quantity. The optimal fog collection pore size of the synthesized (super) hydrophobic/(super) hydrophilic aluminum membrane was 108 μm, and its fog collection amount was as high as approximately 31.3 times the lowest fog collection amount.