多孔超疏水表面疏水稳定性与集气性能研究

Study of Hydrophobic Stability and Air Collection Properties of Porous Superhydrophobic Surfaces

摘要: 基于仿生学思想，使用激光在铝板表面加工出凹槽和微槽的复合微纳形态，并在凹槽内加工出微孔作为气体通道。结果表明，复合微纳结构具有气泡自传输和气体收集特性，在石油化工、生物医学等领域的应用前景广阔。虽然近年来的研究已经实现了微气泡在非对称润湿结构中的定向运动，但对其在减少阻力方面的应用还没有很好的研究。本文使用纳秒激光处理500 µm厚的铝板，实现了气泡的自发定向传输。这种特殊的微结构采用低表面能材料进行处理，以提供更好的抗静水压力和气泡收集能力。

Abstract: Based on the idea of bionics, the composite micro-nano morphology of notches and micro-grooves is laser-machined on the surface of the aluminum plate, micro-pores are machined inside the notches as channels for gas. The results show that composite micro-nano structure has bubble self-transportation and gas collection properties, which holds great promise for applications in petrochemical, biomedical, and other fields. Although recent studies have achieved directional motion of microbubbles in asymmetric wetted structures, their application to drag reduction is not well studied. In this paper, spontaneous directional transport of bubbles was achieved using a 500 µm thick aluminum plate processed with a nanosecond laser. This special microstructure was treated with a low surface energy material to provide better resistance to hydrostatic pressure and bubble collection.