Inspired by liquid super‐repellent skin of springtail, air pockets with tiny openings are fabricated on the surface of polydimethylsiloxane (PDMS) to achieve a stable existence of gas between liquid and micro‐nanostructure. After further low‐energy grafting, the PDMS with air pocket microstructures shows a well hydrophobic and oleophobic property. When the liquid droplet fell on the fabricated surface, the positive pressure generated by the air pocket promotes the wetting state to be much fitting with the Cassie–Baxter model. Based on the super‐repellent microstructures, the flexible material shows properties of anti‐icing and anti‐fog. Additionally, the positive pressure of the air pocket to liquid droplet changed to be negative when stretching stress is applied to the PDMS elastomer. Based on the changed pressure, wetting state of the liquid droplet reversed from super‐low adhesion to high adhesion. The stimulus‐responsive material with reversible wettability has great potential in the applications of microfluidic chip and controlled releasing liquid micro‐droplets.

中文翻译：

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空化生物启发性柔性薄膜的简便制造策略：对液体粘附具有刺激响应的液体超排斥材料

受跳尾的液体超疏水表层的启发，在聚二甲基硅氧烷（PDMS）的表面上制造了具有微小开口的气穴，以使气体在液体和微纳米结构之间稳定存在。经过进一步的低能接枝后，具有气穴微结构的PDMS表现出良好的疏水性和疏油性。当液滴落在加工好的表面上时，气穴产生的正压会促进润湿状态，从而与Cassie–Baxter模型非常吻合。基于超疏水微结构，这种柔性材料具有防冰和防雾的特性。另外，当向PDMS弹性体施加拉伸应力时，气穴对液滴的正压变为负压。根据变化的压力，液滴的润湿状态从超低附着力转变为高附着力。具有可逆润湿性的刺激响应材料在微流控芯片和控释液体微滴的应用中具有巨大潜力。