Results
Title

High-efficiency self-repairing anticorrosion coatings with controlled assembly microcapsules.

Authors

Kong, Fanhou; Xu, Weichang; Zhang, Xuelong; Wang, Xin; Zhang, Yu; Wu, Jinglong

Abstract

Based on the principle of emulsion technology and self-assembly of materials, aromatic isocyanate derivatives easily reacted with polyols to form polyurethanes, and nonaromatic isocyanate derivatives were responsible for generating the capsule core of the self-healing microcapsules. In this paper, epoxy resin-based self-healing smart anticorrosion coatings with different types of microcapsules were prepared. The cores were IPDI/TMP-IPDI/DiPE-IPDI. The optimal conditions for the preparation of self-repairing microcapsules to achieve controlled assembly of a microcapsule material structure were determined. We set up a test model, incorporating thermal analysis, depression repair level calculation, salt spray corrosion tests, adhesion tests, and other indicators of application performance. The corrosion resistance was in the order: DiPE-IPDI > TMP-IPDI > IPDI > pure epoxy. The experimental results showed a self-healing efficiency of more than 80% for cores of DiPE-IPDI. Taking into account the overall properties, the best-quality coatings contained approximately 5% microcapsules of DiPE-IPDI.

Subjects

POLYOLS; POLYURETHANES; ISOCYANATES; SELF-healing materials; MICROENCAPSULATION

Publication

Journal of Materials Science, 2018, Vol 53, Issue 18, p12850

ISSN

0022-2461

Publication type

Academic Journal

DOI

10.1007/s10853-018-2596-6