Fabrication study of a new anticorrosion coating based on supramolecular nanocontainer

• A new type functional nanoreservoir based on MWCNTs and β-cyclodextrin was successfully synthesized by a novel and facile chemical method.
• The functional nanoreservoir (β-cyclodextrin/MWCNTs) loaded with a “green” corrosion inhibitor benzimidazole (BZ).
• MWCNTs/β-CD-benzimidazole endowed self-healing property.
• MWCNTs/β-CD-benzimidazole as filler greatly improved the corrosion resistance of epoxy resins.

A new type of functional nanoreservoir based on multi-walled carbon nanotubes (MWCNTs) and β-cyclodextrin was synthesized through a new and facile chemical method. The functional nanoreservoir (β-cyclodextrin/MWCNTs) loaded with a “green” corrosion inhibitor benzimidazole (BZ) was admixed into epoxy as a filler to enhance its anticorrosion performance. The structure and morphology of nanoreservoir were studied by SEM, TEM, XRD, BET analyses, FT-IR, 1H NMR, and TGA. The anticorrosion and self-healing properties of coating were investigated by electrochemical impedance spectroscopy (EIS) and scarification test; the studied results indicated that the addition of functional nanoreservoir loaded with the corrosion inhibitor could significantly improve resistance to steel corrosion, which was attributed to the release of the encapsulated corrosion inhibitor.

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