This study aims to experimentally examine the dynamic characteristics of a liquid droplet impinging on the microscale hole-patterned surfaces with the anodization method to make the hydrophilic hole-patterned surface. We studied static and dynamic wetting behavior and compared the hydrophobic characteristics of a drilled hole-patterned surface. The equilibrium contact angle, the dynamic contact diameter, and the dynamic contact angle are measured over time by using image analysis. By modeling the force balance between capillary and hydrostatic forces, the liquid displacement length and equilibrium contact angle of the anodized bare surfaces is estimated and compared with experimental data. It is found that the dynamic contact angle decreased with an increase in the hole area fraction for the anodized hole-patterned surface. In contrast, the equilibrium contact angle and the dynamic contact angle in the hole-patterned surface without the anodization increased with the hole area fraction, showing different tendencies. It is also shown that the dynamic contact diameter increased more on the area fraction and Weber number on the hole-patterned surfaces with the anodization.

本研究旨在通过阳极氧化方法以实验方法研究液滴撞击在微孔图案表面上的动力学特性，从而制成亲水性孔图案表面。我们研究了静态和动态润湿行为，并比较了钻孔图案表面的疏水特性。通过使用图像分析，随时间测量平衡接触角，动态接触直径和动态接触角。通过对毛细管力和静水力之间的力平衡进行建模，可以估算出阳极氧化裸露表面的液体位移长度和平衡接触角，并将其与实验数据进行比较。已经发现，对于阳极氧化的孔图案化表面，动态接触角随着孔面积分数的增加而减小。相比之下，没有阳极氧化的孔型表面中的平衡接触角和动态接触角随孔面积分数的增加而增加，表现出不同的趋势。还显示出，随着阳极氧化，动态接触直径在孔图案化表面上的面积分数和韦伯数上增加更多。