Bioinspired Smart Anticorrosive Coatings with an Emergency-Response Closing Function.
Ji-Heng DingHongran ZhaoZhenzong ShaoHaibin YuPublished in: ACS applied materials & interfaces (2019)
Emergency-response closing (ERC) of diffusion pathways for aggressive species in graphene/epoxy (G/EP) coatings was achieved via terpyridine derivative (TDD)-functionalized graphene oxide (tGO). Under stimulation from corrosion produced ferrous (Fe2+) ions, tGO sheets urgently aggregated through complexation reminiscent of leaves closing on a mimosa. Consequently, the coating showed significantly decreased oxygen (ORT) and water vapor transmittance rate (WVTR) changes after immersion in ferrous solution. According to the simulation and electrochemical results, tGO sheets could self-assemble into 3D architectures with Fe2+ ions and efficiently protect metals from aggressive species attack. This tGO/EP coating provided an ERC function via self-adaptability with the Fe2+ ions to achieve long-term anticorrosion. The application of tGO/EP to the protection of metal components is therefore validated as a fascinating route for the enhancement of anticorrosion efficiency on graphene anticorrosive coatings, with great potential in durable anticorrosive coatings application.
Keyphrases
- aqueous solution
- quantum dots
- public health
- emergency department
- water soluble
- healthcare
- metal organic framework
- human health
- gold nanoparticles
- room temperature
- molecularly imprinted
- carbon nanotubes
- ionic liquid
- mass spectrometry
- health risk
- visible light
- genetic diversity
- climate change
- high resolution
- risk assessment
- drinking water
- heavy metals
- liquid chromatography