Preparation of a novel IPDI/PUF@CeO2 bi-functional microcapsules and its improvement for the self-healing and anti-corrosion performance in epoxy coatings

This research aims to improve the protective performance of coatings in harsh corrosive conditions by using functionalized self-healing microcapsules. CeO2/PUF MCs and PUF MCs were prepared via one-step emulsion polymerization. The microcapsules were implanted into epoxy coatings to investigate thei...

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Bibliographic Details
Published in:Progress in organic coatings 2022-08, Vol.169, p.106897, Article 106897
Main Authors: Liu, Shuhui, Xie, Hui, Cao, Qingmin, Ning, Yujie, Song, Yihan, Zhang, Chengdong, Liu, Bin
Format: Article
Language:English
Subjects:
Anti-corrosion coating
Bi-function
Cerium oxide
Cerium oxides
Chemical composition
Core-shell structure
Corrosion prevention
Corrosion products
Crystal structure
Emulsion polymerization
Epoxy coatings
Protective coatings
Self healing materials
Self-healing microcapsules
Spherical shells
Thermodynamic properties
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Summary:This research aims to improve the protective performance of coatings in harsh corrosive conditions by using functionalized self-healing microcapsules. CeO2/PUF MCs and PUF MCs were prepared via one-step emulsion polymerization. The microcapsules were implanted into epoxy coatings to investigate their self-healing performance. Multiple testing techniques, including SEM, FTIR, XRD, TGA, EIS, and NSS were used to characterize the morphology, crystal structure, chemical composition, thermal properties, and self-healing performance of the microcapsules and coatings. The experimental results indicated that the CeO2/PUF MCs had a spherical core-shell structure with a rough surface and an average diameter of 1583 nm. Meanwhile, the minimum corrosion products and the highest low-frequency impedance were found in CeO2/PUF MCs coating with artificial scratch, which demonstrated that the self-healing and anti-corrosion performance were significantly improved by the newly developed bi-functional microcapsules. •The novel IPDI@PUF/CeO2 bi-functional microcapsules were prepared by a simple one-step emulation polymerization.•The IPDI core repaired the cracks of coatings, and the PUF/CeO2 shell generated a passive film on the metallic matrix.•The CeO2/PUF MCs coatings had better corrosion resistance and self-healing performance.
ISSN:0300-9440
1873-331X
DOI:10.1016/j.porgcoat.2022.106897