Synthesis and Characterization of Anticorrosive Hybrid Epoxy Coating based on Polyaniline/Nanodiamond Nanostructures

Mohammadkhani, Rahman | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50711 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Shojaei, Akbar; Pirhady, Nahid
  7. Abstract:
  8. One of the ways that corrosion control is presented is the use of coatings that have good properties such as high adhesion, impact resistance, ultraviolet radiation, and so on. They also have other unique properties like anti-corrosion property. To achieve coatings with these advanced properties, they use special properties of nanocomposites. Nanocomposites can add or improve one or more properties to coating properties.In the present study, we tried to first synthesize NanoDiamond/Polyaniline hybrid nanoparticles in different percentages and then use this hybrid in epoxy ester coating. To characterize this hybrid, various analyzes such as FE-SEM, TEM, FT-IR, UV-Visible, TGA and XRD were performed. The FE-SEM test showed that by increasing the percentage of diamond nanoparticles in polyaniline, the morphology changes from nanotube to nanosphere. A claim that the TEM test also confirms. To investigate the effect of these hybrids on coating, EIS analysis was used. Three samples of epoxy ester coatings were fabricated with diamond nanoparticles, NanoDiamond/ Polyaniline hybrids 5% and NanoDiamond/Polyaniline hybrids 50%, and the results of the EIS analysis were compared with the epoxy ester without nanoparticles. The results show a dramatic improvement in the coating performance with nanoparticles as compared to the blank coating, since in the epoxy ester sample without a nanoparticle, a significant drop in coating resistance was observed only after one week. However, coatings containing diamond nanoparticles, hybrids 5% and 50% have no resistive loss until 71 days. Gradually, after this day, the loss of resistance was observed. These results indicate that the nanoparticles are highly resistant to corrosion ions penetration
  9. Keywords:
  10. Nanodiamond ; Smart Coating ; Anticorrosive Coating ; Epoxy Coating ; Hybrid Nanocoating ; Polyaniline/Nanodiamond Hybrid

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