Mussel-Inspired Self-Healing Coatings Based on Polydopamine-Coated Nanocontainers for Corrosion Protection

ACS Applied Materials & Interfaces
Bei QianDmitry Shchukin

Abstract

The mussel-inspired properties of dopamine have attracted immense scientific interest for surface modification of nanoparticles due to the high potential of dopamine functional groups to increase the adhesion of nanoparticles to flat surfaces. Here, we report for the first time a novel type of inhibitor-loaded nanocontainer using polydopamine (PDA) as a pH-sensitive gatekeeper for mesoporous silica nanoparticles (MSNs). The encapsulated inhibitor (benzotriazole) was loaded into MSNs at neutral pH, demonstrating fast release in an acidic environment. The self-healing effect of water-borne alkyd coatings doped with nanocontainers was achieved by both on-demand release of benzotriazole during the corrosion process and formation of the complexes between the dopamine functional groups and iron oxides, thus providing dual self-healing protection for the mild steel substrate. The coatings were characterized by electrochemical impedance spectroscopy, visual observations, and confocal Raman microscopy. In all cases, the coatings with embedded benzotriazole-loaded MSNs with PDA-decorated outer surfaces demonstrated superior self-healing effects on the damaged areas. We anticipate that dopamine-based multifunctional gatekeepers can find a...Continue Reading

References

Oct 20, 2007·Science·Haeshin LeePhillip B Messersmith
Feb 1, 2011·Proceedings of the National Academy of Sciences of the United States of America·Niels Holten-AndersenJ Herbert Waite
Feb 25, 2011·ACS Nano·Dimitriya BorisovaDmitry G Shchukin
Aug 27, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Martin Müller, Bernd Kessler
Sep 30, 2014·Chemical Communications : Chem Comm·Zhaoliang ZhengDmitry Shchukin
Sep 24, 2015·ACS Applied Materials & Interfaces·Zhaoliang ZhengDmitry Shchukin
Nov 13, 2015·ACS Applied Materials & Interfaces·Ferdinand SingerSannakaisa Virtanen
Sep 29, 2017·Biosensors·John D CiubucFelicia S Manciu
Oct 13, 2017·ACS Applied Materials & Interfaces·Marios MichailidisDmitry Shchukin
Feb 22, 2018·ACS Applied Materials & Interfaces·Ji Hyun RyuHaeshin Lee

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BETA
scanning
X-ray
transmission electron microscopy

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IviumSoft

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