具有单凹结构的超疏水表面的简易制备与结构调控

Facile Preparation and Design of Superhydrophobic Surfaces with Re-entrant Structures

超疏水表面在制造业、化学工业和航空航海等应用领域所面临的复杂环境往往导致其表面结构被液体浸润,进而失去原有的表面特性。尽管单凹结构的引入对提高超疏水表面稳定性的研究取得了一些进展,现有的设计仍然存在工艺复杂难以实现工业应用的问题。因此,实现单凹结构在超疏水表面的实际应用仍具有广阔的研究前景。该文针对一种可复制的微柱阵列进行单凹结构修饰,提出了单凹微结构实现的设计参数区间。针对所设计的单凹结构,通过共聚焦显微镜在3个维度上对液体单凹结构表面的刺穿过程成像纪录,探索了单凹结构调控中气层对超疏水特性与抗浸润稳定性的影响。

The complex environment which superhydrophobic surfaces faced in applications,such as in manufacturing,chemical industry,aviation and navigation,may easily cause superhydrophobic surfaces to be infiltrate by liquids and lost the original interfacial characteristics.Although the introduction of the re-entrant texture has made some progress in improving the stability of the superhydrophobic surface,the existing design of the re-entrant texture is difficult to achieve industrial application due to the complexity of preparation.Therefore,how to realize the practical application of re-entrant texture on superhydrophobic surfaces remains a challenge.This article proposes the design principle of a facile method to produce superhydrophobic surfaces with duplicatable re-entrant texture on micro pillars.To understand the influence of the proportion of the air cushion in the designed surfaces on the superhydrophobicity and stability,we imaged the impalement in three dimensions by confocal microscope.