The fine microstructure on the natural green bristlegrass leaf of Setaria viridis (L.) Beauv, which exhibits a contact angle (CA) of 155°±2° and a rolling angle (RA) of 79°±2°, is carefully observed. Based on the understanding of the underlying mechanisms for superhydrophobicity and moderate surface adhesion, an efficient replica molding strategy is proposed for mimicking the microstructures on green bristlegrass leaf surface to polypropylene (PP) surfaces. The bioinspired PP replica with dual‐level micropillars are molded by using the unitized template of steel Meshes A and B. Interestingly, the PP replica inherits both hydrophobicity and adhesion of the natural leaf. Furthermore, the PP replica can stabilize its hydrophobic state under a 980 Pa external pressure, which is attributed to the composite Cassie‐Wenzel mixed wetting state on the microstructured interface. The CA comparatively goes down and RA increases, resulting in superhydrophobic surface with moderate adhesion on the bioinspired surface. Hence, the microstructures and hydrophobicity are successfully replicated to the PP surface by only using the low cost, available and reliable steel meshes in the bioinspired replica molding process.

中文翻译：

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受绿色猪鬃草叶启发，在聚丙烯表面上以规则的双重生物柱制备具有强大疏水性的常规双层微柱

狗尾草的天然绿色硬毛草叶上的细微结构（L.）仔细观察观察到表现出155°±2°的接触角（CA）和79°±2°的滚动角（RA）的Beauv。基于对超疏水性和中等表面粘附力的潜在机理的理解，提出了一种有效的复制模制策略，用于模仿绿色硬毛草叶表面到聚丙烯（PP）表面的微观结构。具有启发性的具有双层微柱的PP复制品是使用钢网A和B的组合模板模制而成的。有趣的是，PP复制品继承了天然叶片的疏水性和粘附性。此外，PP复制品可以在980 Pa的外部压力下稳定其疏水状态，这归因于微结构界面上的复合Cassie-Wenzel混合润湿状态。CA相对下降，RA增加，产生超疏水性表面，并在受生物启发的表面上具有适度的附着力。因此，通过在仿生仿品成型过程中仅使用低成本，可用和可靠的钢网，即可将微结构和疏水性成功复制到PP表面。