Smart epoxy coating: g-C3N4 nanosheets loaded MOFs for enhanced anti-corrosion and UV resistance

Li, Xiaodan; Liu, Hongyu; Meng, Shiyun; Wang, Feng; Mei, Ting; Cai, Xiongrui; Ran, Ya

doi:10.1016/j.cej.2024.150731

Chemical Engineering Journal

2024

DOI: 10.1016/j.cej.2024.150731

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Smart epoxy coating: g-C3N4 nanosheets loaded MOFs for enhanced anti-corrosion and UV resistance

Xiaodan Li,

Hongyu Liu,

Shiyun Meng

et al.

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Cited by 12 publications

References 95 publications

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Lurid Bolete‐Inspired Damage Reporting Coating with Simultaneous Weathering and Corrosion Resistance: Construction Strategy and Real‐Time Degradation Monitoring

Wang,

Liu,

Zhou

et al. 2024

Adv Funct Materials

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Organic protective coatings encounter significant challenges in the face of mechanical damage, weathering degradation, and corrosion activities. Developing coatings that feature both autonomous damage reporting and enhanced durability is a promising yet challenging endeavor. In this study, inspired by the “damage coloration” of lurid bolete, a multifunctional smart coating integrating color/fluorescence damage reporting, weathering resistance, and active corrosion protection capabilities is developed by incorporating microcapsules encapsulated with crystal violet lactone (CVL) and cerium oxide (CeO2) nanoparticles into polyurethane (PU) resins. CVL, a damage‐reporting indicator exhibiting both color and fluorescence emission, is encapsulated within PU/poly‐(urea formaldehyde) (PU/UF) microcapsules. CVL is released from the microcapsules upon damage, exhibiting localized fluorescence enhancement under UV irradiation and an intense blue coloration resulting from the chromogenic reaction with CeO2 nanoparticles. In addition to initiating the chromogenic reaction of CVL, the CeO2 nanoparticles confer outstanding weathering resistance and active corrosion protection to the coating matrix through their UV absorption and corrosion inhibition properties. The performance improvement of the composite coating in terms of weathering resistance and corrosion resistance is verified by in situ transmittance testing and real‐time atmospheric corrosion monitoring.

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Lurid Bolete‐Inspired Damage Reporting Coating with Simultaneous Weathering and Corrosion Resistance: Construction Strategy and Real‐Time Degradation Monitoring

Wang,

Liu,

Zhou

et al. 2024

Adv Funct Materials

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Robust Damage‐Sensing and Corrosion‐Warning Polymeric Coatings: a New Approach to Visually Monitor the Degradation Dynamics of Coated Mg‐Alloys

Cheng,

Zhang,

Cao

et al. 2024

Small

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Corrosion and degradation of magnesium (Mg) alloy result in serious damage and limit its application in new‐energy automobile industry. Considerable protective coating is proposed, yet it is hindered by the difficulties in avoiding and visually monitoring coating micro‐damage and localized metal corrosion. Herein, a novel anticorrosion coating system with autonomously monitoring multiple levels of damages in coated Mg‐alloy system, is proposed. In this design, the top layer of coating consists of polymethyl methacrylate (PMMA) microcapsules containing crystal violet lactone (CVL) and polyurethane resin dispersed with SiO2 nanoparticles. Upon surface damage, the presence of SiO2 triggers the chromogenic reaction of CVL liberated from ruptured microcapsules, resulting in an immediate blue coloration to highlight coating damage. Meanwhile, the primer coating incorporates PMMA microcapsules with a phenolphthalein (PHP) core, which timely reveals alkaline corrosion pits at Mg alloy/coating interface by generating pink coloration. Furthermore, the microcapsules‐embedded coating exhibits superior corrosion resistance. The failure evolution dynamics of coating‐Mg system, including both the external coating damage and internal localized corrosion, can be visually indicated. This work provides an innovative strategy to tailor and monitor the degradation of coated Mg alloys, thereby presenting promising prospects for application in automotive anticorrosion engineering.

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Cerium-based metal-organic frameworks: Synthesis, properties, and applications

Molavi

2025

Coordination Chemistry Reviews

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Smart epoxy coating: g-C3N4 nanosheets loaded MOFs for enhanced anti-corrosion and UV resistance

Cited by 12 publications

References 95 publications

Lurid Bolete‐Inspired Damage Reporting Coating with Simultaneous Weathering and Corrosion Resistance: Construction Strategy and Real‐Time Degradation Monitoring

Lurid Bolete‐Inspired Damage Reporting Coating with Simultaneous Weathering and Corrosion Resistance: Construction Strategy and Real‐Time Degradation Monitoring

Robust Damage‐Sensing and Corrosion‐Warning Polymeric Coatings: a New Approach to Visually Monitor the Degradation Dynamics of Coated Mg‐Alloys

Cerium-based metal-organic frameworks: Synthesis, properties, and applications

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