An intelligent anticorrosion coating based on pH-responsive smart nanocontainers fabricated via a facile method for protection of carbon steel

CATEGORY: COATINGS: INTELLIGENT 
An intelligent anticorrosion coating based on pH-responsive smart nanocontainers fabricated via a facile method for protection of carbon steel

Type	Journal Article
Author	MingDong Wang
Author	MengYang Liu
URL	http://pubs.rsc.org/en/content/articlelanding/2015/ta/c5ta00417a
Volume	3
Issue	12
Pages	6423-6431
Publication	Journal of Materials Chemistry A
Date	2015-03-10
Abstract	Morphologically intact hollow mesoporous zirconia nanospheres (HMZSs) with a hollow core mesoporous shell structure were synthesized by a sol–gel protection method and used as scaffolds for smart nanocontainers. L-Carnosine (L-CAR) was proved to be a green, efficient and mixed-type corrosion inhibitor for the protection of carbon steel. The net charge on L-CAR molecules is influenced by the solution pH and matches the changing regularity of the zeta potential of HMZSs. Taking advantage of the pH-dependent electrostatic interactions between HMZSs and L-CAR, the smart nanocontainers constructed by directly binding L-CAR to HMZSs achieve acid/alkaline-responsive controlled release. The smart nanocontainers, L-CAR loaded HMZSs, were incorporated into a water-borne epoxy coating to assemble the intelligent anticorrosion coatings (IACs).