Superoleophobic textured aluminum surfaces

Abstract

With the aim of creating superoleophobic surfaces on engineering materials and understanding the influences of surface structures on the oleophobicity, we develop a convenient route to achieve superoleophobic surfaces on aluminum substrates using simple etching and surface fluorination. The liquid repellency of the textured surface is demonstrated by visible experimental results and contact angle measurements. Etching conditions, such as the etching time and etching procedure, play critical roles in establishing the oleophobicity. The micrometre-scale structures are essential for achieving the composite interface with low surface tension liquids, and the nanoscale structures formed in the treatment with boiling water lead to a decrease of contact angle hysteresis, bringing about an enhancement of superoleophobicity.

Facile and fast fabrication method for mechanically robust superhydrophobic surface on aluminum foil

“…However, they are 61 actually reactive materials and prone to wearing, which could hin-62 der their practical applications. To [27][28][29][30]. However, these techniques involve multi-step procedures, 88 harsh condition, or specialized reagent and equipment.…”

Superoleophobic surfaces: design criteria and recent studies

“…Yang et al 60 fabricated aluminum sheets with a hierarchical structure composed of distorted nanoscale flakes on microscale protrusions (see Figures 8e and 8f). While the microscale protrusions and pores were obtained by etching with hydrochloric acid, the nanoscale flakes were obtained by dipping the etched structure in boiling water.…”

Fabrication of durable superamphiphobic aluminum alloy surfaces with anisotropic sliding by HS-WEDM and solution immersion processes

“…Superamphiphobic surfaces are characterized by high contact angle (CA) and low sliding angle (SA) for water/oil [1], and have many potential applications including self-cleaning [2,3], corrosion resistance [4,5], anti-fouling [6], anti-icing [7][8][9] and drag-reduction [10], etc. Meanwhile, the superamphiphobic surfaces with anisotropic sliding also have potential applications in microfluidic devices [11,12], evaporation-driven nanopatterns [13,14], and liquid pumps [15].…”