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Designing a dual-functional epoxy composite system with self-healing/barrier anti-corrosion performance using graphene oxide nano-scale platforms decorated with zinc doped-conductive polypyrrole nanoparticles with great environmental stability and non-toxicity

Mohammadkhani, R ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.cej.2019.122819
  3. Publisher: Elsevier B.V , 2020
  4. Abstract:
  5. Designing a novel epoxy composite system with dual self-healing/barrier anti-corrosion functions using graphene oxide (GO) nano-platforms decorated by polypyrrole (PPy) nanoparticles doped with zinc metal ions is the major objective of this research attempt. GO-PPy-Zn nanoplatform was fabricated via one-pot polymerization of pyrrole monomers on GO and two direct/indirect methods of zinc doping. In order to verify the PPy nanoparticles synthesis on GO sheets several analyses such as UV–visible, XPS, HR-TEM and FE-SEM were performed. The epoxy nanocomposite coatings containing GO-PPy and GO-PPy-Zn nanoplatforms were fabricated and applied on carbon steel. The nanocomposite coatings anti-corrosion capability was examined by electrochemical impedance spectroscopy (EIS), salt spray and pull-off adhesion test methods. The results of XPS analysis and HR-TEM and FE-SEM images demonstrated the zinc doped PPy nanoparticles formation on the GO nanoplatform. The great potency of GO-PPy-Zn on the epoxy coating anti-corrosion performance promotion, self-healing-barrier properties enhancement and cathodic delamination resistance improvement were obtained on carbon steel. © 2019 Elsevier B.V
  6. Keywords:
  7. Anti-corrosion ; Epoxy coating ; FE-SEM ; Graphene oxide ; Polypyrrole (PPy) nanoparticles ; XPS ; Atmospheric corrosion ; Electrochemical corrosion ; Electrochemical impedance spectroscopy ; Epoxy resins ; Graphene ; Metal ions ; Metal nanoparticles ; Metals ; Nanocomposites ; Polypyrroles ; Seawater corrosion ; Self-healing materials ; Steel corrosion ; Synthesis (chemical) ; Testing ; X ray photoelectron spectroscopy ; Anticorrosion performance ; Environmental stability ; Epoxy coatings ; Nanoparticles formations ; Nanoparticles synthesis ; Polypyrrole (PPy) ; Pull-off adhesion test ; Corrosion resistant coatings
  8. Source: Chemical Engineering Journal ; Volume 382 , 15 February , 2020
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S1385894719322296