Journal
CHEMICAL ENGINEERING JOURNAL
Volume 303, Issue -, Pages 37-47Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.05.133
Keywords
Electrodeposition; Oxidative polymerization; Superhydrophobic surface; Self-cleaning; Abrasion resistance
Categories
Funding
- National Young Top Talents Plan of China [2013042]
- National Science Foundation of China [51175066]
- FANEDD [201164]
- New Century Excellent Talents in University [NCET-12-0704]
- Science Foundation for Distinguished Young Scholars of Heilongjiang Province [JC201403]
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Inspired by the adhesive proteins in mussels, a novel electrodeposition route has been developed to create multifunctional zinc (Zn)/polydopamine (pDop)/n-dodecyl mercaptan (NDM) composite coatings on different substrates, where oxidative polymerization of dopamine was simultaneously integrated during electrodeposition process. Hierarchical cauliflower-like structure was obtained on the electrodeposited Zn/pDop coatings. After modification with NDM, the prepared Zn/pDop/NDM coatings on different substrates (steel, Al and Cu) possessed excellent superhydrophobicity, exhibiting a maximum water contact angle (WCA) of 167.6 degrees and a sliding angle (SA) less than 1 degrees on the steel substrate. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) were employed to investigate the morphology and the chemical composition of the coatings. The mechanisms of electrodeposition process were discussed. The integrated electrodeposition and polymerization processes promised a synergistic effect on promoting the superhydrophobicity of coating. Results indicated that the dopamine greatly improved the mechanical abrasion resistance of the prepared superhydrophobic coatings. Additionally, these coatings demonstrated superior superhydrophobic stability, corrosion resistance and self-cleaning properties. It is believed that this novel and facile electrodeposition route for fabricating superhydrophobic coatings on various metallic materials will generate great impacts in practical applications. (C) 2016 Elsevier B.V. All rights reserved.
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