A biomimetic surface for water collection was successfully engineered using three-dimensional (3D) printing technology. The fused deposition modeling-type 3D printing was used to create a reusable mold. This was used to cast waveform microstructures on a hydrophobic polymer surface, which was induced by using stacked filaments. The etching was performed on the printed mold by using a chemical solvent to generate nano/micro pores, which enhanced the rolling-off motion of water droplets. To create a hydrophilic region on the hydrophobic surface, the metal deposition was achieved using a 3D-printed mask and the self-masking effect of the tilted tips of waveform microstructures. The metal array served as seeding points for the growth of water droplets in foggy conditions. As a result, the fabricated biomimetic surface exhibited the highest water-collecting performance (average 0.77 g for 10 min) compared with the other four different surfaces. This study demonstrates the use of 3D printing technology to rapidly and simply fabricate engineered (hybrid) surfaces for various applications involving facile control of wettability.

使用三维（3D）打印技术成功设计了一种仿生表面用于集水。熔融沉积建模型3D打印用于创建可重复使用的模具。这用于将波形微结构浇铸在疏水性聚合物表面上，这是通过使用堆叠的细丝引起的。通过使用化学溶剂在印刷模具上执行蚀刻，以生成纳米/微孔，从而增强了水滴的滚落运动。为了在疏水表面上创建亲水区域，使用3D打印的掩模和波形微结构的倾斜尖端的自掩蔽效果实现了金属沉积。金属阵列充当有雾条件下水滴生长的种子点。结果是，与其他四个不同的表面相比，所制造的仿生表面表现出最高的集水性能（10分钟平均为0.77 g）。这项研究证明了使用3D打印技术快速简便地制造工程化（混合型）表面的各种应用，涉及到对润湿性的轻松控制。