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A novel and cost-effective method for fabrication of a durable superhydrophobic aluminum surface with self-cleaning properties

Afzali, N ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1088/1361-6528/abad5c
  3. Publisher: IOP Publishing Ltd , 2020
  4. Abstract:
  5. A hierarchical superhydrophobic surface is prepared via a two-step boiling water immersion process and anodization of the treated aluminum substrate in a novel hydrophobic electrolyte of aluminum nitrate and stearic acid mixture at room temperature. The immersion time in boiling water had a significant influence on the morphology and durability of the sample. A pseudoboehmite coating is created on the aluminum surface during the boiling process, as revealed by the field emission scanning electron microscopy (FE-SEM) and Fourier transform infrared (FTIR) spectrophotometer results. The energy-dispersive x-ray spectroscopy analysis confirmed the formation of hydrophobic coating surface after anodization. Also, the FE-SEM images and the atomic force microscopy (AFM) investigation proved the hierarchical nano-and microstructure stem from boiling and anodizing procedures, respectively. The successively boiled and anodized surface exhibited contact angle of about 155o, sliding and hysteresis contact angles of <5o and 2o, respectively. It also demonstrated a self-cleaning property and remarkable durability. © 2020 IOP Publishing Ltd
  6. Keywords:
  7. Aluminum anodization ; Boiling water ; Durable ; Self-cleaning ; Superhydrophobic ; Aluminum compounds ; Aluminum metallography ; Atomic force microscopy ; Contact angle ; Cost effectiveness ; Durability ; Electrolytes ; Enamels ; Energy dispersive spectroscopy ; Field emission microscopes ; Fourier transform infrared spectroscopy ; Morphology ; Scanning electron microscopy ; Superhydrophobicity ; Aluminum substrate ; Cost-effective methods ; Energy dispersive x-ray spectroscopy analysis ; Field emission scanning electron microscopy ; Fourier transform infrared ; Hydrophobic coatings ; Self-cleaning properties ; Super-hydrophobic surfaces ; Aluminum coatings
  8. Source: Nanotechnology ; Volume 31, Issue 46 , 2020
  9. URL: https://iopscience.iop.org/article/10.1088/1361-6528/abad5c/meta