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实验制备了不同氧化刻蚀程度的疏水表面,并进行相应的露点冷凝实验。实验结果显示,通过氧化刻蚀制备的疏水表面存在不同程度的表面不均匀性,受局部微观结构差异的影响,冷凝初始液滴优先在表面上未发生明显刻蚀的区域出现,而刻蚀部分基本不发生有效核化。两种不同刻蚀程度表面之间的对比实验表明,刻蚀程度差异导致的表面微观结构差异明显改变了表面冷凝液滴个数,通过调控表面的刻蚀程度,构造具有特定微观结构特征参数的结构表面,有可能在保证实现表面超疏水性能的同时对表面核化点密度进行调控和优化。
Hydrophobic surfaces with different degrees of oxidative etching were prepared experimentally, and the corresponding dew point condensation experiments were carried out. The experimental results show that there are different degrees of surface heterogeneity on the hydrophobic surface prepared by oxidative etching. Under the influence of the local microstructural differences, the initial droplets of condensation appear preferentially in the areas where no significant etching occurs on the surface, while the etched portions Basic does not occur effective nucleation. The contrast experiments between two different etching degree surfaces show that the differences of the surface microstructures caused by the different etching degrees obviously change the number of surface condensate droplets. By adjusting the etching degree of the surface, the microstructural parameters with specific microstructures The surface of the structure, it is possible to regulate and optimize the surface nucleation point density while ensuring superhydrophobic properties of the surface.