Elsevier

Materials & Design

Volume 188, March 2020, 108479
Materials & Design

Superamphiphobic aluminum alloy with low sliding angles and acid-alkali liquids repellency

https://doi.org/10.1016/j.matdes.2020.108479Get rights and content
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Highlights

  • Superamphiphobicity was achieved by HCl-etching, H2O-treatment and POTS grafting.

  • The HCl-H2O-POTS surface repels liquids with surface tension from 72.8 to 27.5 mN·m1.

  • Outstanding chemical stability was confirmed with pH values ranging from 1 to 14.

  • The surface exhibits repeatability and stability after 20 times self-cleaning tests.

Abstract

The achievement of superamphiphobic material with ultralow sliding angles is a highly worthwhile and challenging task because the current artificial superhydrophobicity can be easily contaminated and wetted by low surface tension liquids. Herein, we construct superamphiphobic 5083 aluminum alloy surface through a facile strategy including sono-assisted HCl etching, boiling H2O treatment and POTS grafting. Micro-nano dual scale hierarchical structure was achieved, attributing to air cushion formation and Cassie contacts. The as-prepared superamphiphobic HCl-H2O-POTS AA5083 surface has a wide range of liquids repellency to water, glycerol, ethylene glycol, peanut oil and even n-hexadecane (surface tension: 27.5 mN·m1). The superamphiphobic surface also possesses outstanding self-cleaning ability for contaminants and chemical stability for liquid droplets with different pH values. All these advantages will endow the superamphiphobic HCl-H2O-POTS surface with broad applications prospects, including automobile, aerospace, military and marine industries.

Graphical abstract

Self-cleaning and chemically stable superamphiphobic HCl-H2O-POTS AA5083 surface was developed through a facile strategy of sono-assisted HCl etching, boiling H2O treatment and POTS grafting.

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Keywords

Micro-nano
Superhydrophobic
Superamphiphobic
Chemical stability
Self-cleaning

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