Combining a fast self-healing action and a high barrier property remains a challenge in polymeric protective coatings. Herein, we report an intrinsic self-healing epoxy coating in which 2-ureido-4[1H]-pyrimidinone (UPy) as a quadruple hydrogen bonding unit, grafted onto the backbones of an epoxy-matrix by an amine-terminated oligo(propylene glycol) linker. Without any intervention, the epoxy-matrix performs its self-healing function in ∼5 min, even under aqueous immersion. Besides, electrochemical impedance spectroscopy measurements demonstrate corrosion protection ability of such self-healed coating on a steel substrate, with a high |Z|0.01Hz value of 4.8 × 1010 Ω·cm2 after 60 days of immersion in NaCl solution.
Ultrafast and high-efficient self-healing epoxy coatings with active multiple hydrogen bonds for corrosion protection / Liu, T., Zhao, H., Zhang, D., Lou, Y., Huang, L., Ma, L., Hao, X., Dong, L., Rosei, F., Lau, W.M.. - In: CORROSION SCIENCE. - ISSN 0010-938X. - 187:(2021), pp. https://doi.org/10.1016/j.corsci.2021.109485-https://doi.org/10.1016/j.corsci.2021.109485. [10.1016/j.corsci.2021.109485]
Ultrafast and high-efficient self-healing epoxy coatings with active multiple hydrogen bonds for corrosion protection
Rosei, Federico;
2021-01-01
Abstract
Combining a fast self-healing action and a high barrier property remains a challenge in polymeric protective coatings. Herein, we report an intrinsic self-healing epoxy coating in which 2-ureido-4[1H]-pyrimidinone (UPy) as a quadruple hydrogen bonding unit, grafted onto the backbones of an epoxy-matrix by an amine-terminated oligo(propylene glycol) linker. Without any intervention, the epoxy-matrix performs its self-healing function in ∼5 min, even under aqueous immersion. Besides, electrochemical impedance spectroscopy measurements demonstrate corrosion protection ability of such self-healed coating on a steel substrate, with a high |Z|0.01Hz value of 4.8 × 1010 Ω·cm2 after 60 days of immersion in NaCl solution.Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
