Design and Fabrication of a Novel Stimulus-Feedback Anticorrosion Coating Featured by Rapid Self-Healing Functionality for the Protection of Magnesium Alloy

By Ding, ChenDi; Xu, JianHua; Tong, Ling; Gong, GuangCai; Jiang, Wei; Fu, Jiajun
Published in ACS Applied Materials & Interfaces NULL 2017

Abstract

Corrosion potential stimulus-responsive smart nanocontainers (CP-SNCs) are designed and synthesized based on the installation of the supramolecular assemblies (bipyridinium ? water-soluble pillar[5]arenes) onto the exterior surface of magnetic nanovehicles (Fe3O4@mSiO2), linked by disulfide linkers. The supramolecular assemblies with high binding affinity as gatekeepers effectively block the encapsulated organic corrosion inhibitor, 8-hydroxyquinoline (8-HQ), within the mesopores of Fe3O4@mSiO2. When the corrosion potential of the magnesium alloy (?1.5 V vs SHE) is exerted, 8-HQ is released instantly because of the cleavage of disulfide linkers and the removal of the supramolecular assemblies. CP-SNCs were incorporated into the hybrid organic

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