Self-healing coatings for large-scale damages via ultrahigh load capacity of healing agents in short kapok microtubules

Abstract

Self-healing materials, due to their ability to autonomously repair damages, have been extensively applied in the field of metal corrosion protection. However, prior self-healing coatings are powerless against large-scale damages limited by their relatively low amounts of prestored self-healing agents in microcontainers, which severely restricts their long-term anticorrosion performance. Herein, to address this issue, we propose a simple strategy to prestore a water-soluble cerium-based corrosion inhibitor, cerium gluconate, into Kapok fibers through a cyclic process of vacuum drying after saturation with the inhibitor solution, and the load capacity of cerium gluconate in Kapok (CG@K) by th..