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Fabrication of an Anisotropic Superhydrophobic Polymer Surface Using Compression Molding and Dip Coating

机译：压铸和浸涂法制备各向异性超疏水聚合物表面

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Many studies of anisotropic wetting surfaces with directional structures inspired from rice leaves, bamboo leaves, and butterfly wings have been carried out because of their unique liquid shape control and transportation. In this study, a precision mechanical cutting process, ultra-precision machining using a single crystal diamond tool, was used to fabricate a mold with microscale directional patterns of triangular cross-sectional shape for good moldability, and the patterns were duplicated on a flat thermoplastic polymer plate by compression molding for the mass production of an anisotropic wetting polymer surface. Anisotropic wetting was observed only with microscale patterns, but the sliding of water could not be achieved because of the pinning effect of the micro-structure. Therefore, an additional dip coating process with 1H, 1H, 2H, 2H-perfluorodecythricholosilanes, and TiO2 nanoparticles was applied for a small sliding angle with nanoscale patterns and a low surface energy. The anisotropic superhydrophobic surface was fabricated and the surface morphology and anisotropic wetting behaviors were investigated. The suggested fabrication method can be used to mass produce an anisotropic superhydrophobic polymer surface, demonstrating the feasibility of liquid shape control and transportation.
机译：由于稻米叶，竹叶和蝴蝶翅具有独特的液体形状控制和传输能力，因此已经进行了许多具有方向结构的各向异性润湿表面的研究。在这项研究中，使用精密机械切割工艺，使用单晶金刚石工具进行超精密加工，以制造具有三角形横截面形状的微尺度定向图案的模具，以实现良好的可模塑性，并将这些图案复制到扁平热塑性塑料上聚合物板通过压缩成型用于大规模生产各向异性润湿的聚合物表面。各向异性润湿仅在微尺度模式下观察到，但是由于微结构的钉扎效应，无法实现水的滑动。因此，使用具有1H，1H，2H，2H-全氟癸基有机硅烷和TiO2纳米粒子的附加浸涂工艺可实现较小的滑动角，纳米级图案和低表面能。制备了各向异性超疏水表面，并研究了其表面形态和各向异性润湿行为。所建议的制造方法可用于批量生产各向异性超疏水性聚合物表面，证明了液体形状控制和运输的可行性。

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