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Investigation on the Nanocomposites of Metal-Organic Framework (MOF)/Nanoparticles on Anticorrosion Properties of Epoxy Coatings

Tataei, Erfan | 2025

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 58212 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Shojaei, Akbar
  7. Abstract:
  8. This research presents a simple, robust, and effective method for improving the active corrosion protection role of UiO-66 by hybridization with nanodiamond (ND) in epoxy coating at harsh acidic (pH =3) and alkaline (pH =10) conditions. To have UiO-66 still as a dominant component in nanocomposite coatings, the composition of the chemical (UiO-66@ND) and physical (UiO-66&ND) nanohybrids was used to be 80:20 for UiO-66:ND; but the total content of the nanoparticles in the epoxy coating was considered to be 0.67 wt.%. Based on electrochemical impedance spectroscopy (EIS) analysis, we showed in this research that the incorporation of a few amount of ND improved the performance of UiO-66 much higher. As a result, the protective efficiency factor (η) of the EP/UiO-66&ND was 425% after 24 hours of immersion in an acidic environment, which was much higher than that of pure UiO-66 with a value of 235%. In an alkaline environment, after 24 hours of immersion, the η value of EP/UiO-66@ND was 76%, which was higher than that of pure UiO-66 with a value of 60%. Such interesting behaviors were attributed to the synergistic effects of both UiO-66, caused by degradation to its ingredients of Zr ions and organic ligands, along with the functional groups of ND within the epoxy coatings. FE-SEM images and EDS analysis of the scratch area after 24 hours of immersion for the EP/UiO-66@ND and EP/UiO-66&ND coating showed a resistant and stable film as well as reduced coating delamination in neutral and harsh corrosive environments
  9. Keywords:
  10. Self-Healing Coatings ; Hybrid Inhibitors ; Metal-Organic Framework ; Epoxy Coating ; Anticorrosive Coating

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