Abstract
Micro/nanocontainer-based self-healing coatings have achieved enormous interest in scientific community during the last decade. However, the search for multifunctional micro/nanocontainers still has research challenge, especially for the micro/nanocontainers with dual functionality (both anticorrosion and antimicrobial). Here, a novel type of microcapsules with antimicrobial shell and anticorrosion core was prepared by the Pickering emulsion polymerization technique. Dimethyloctadecyl [3-(trimethoxysilyl) propyl] ammonium chloride (QC18) and linseed oil were encapsulated as the antimicrobial and the anticorrosion agents, respectively. The results of local electrochemical impedance spectroscopy (LEIS) at 10 Hz demonstrated corrosion suppression in the scratched area of coatings doped with multifunctional microcapsules. Additionally, the QC18-modified microcapsules exhibited high antibacterial performance, showing over 90 % antimicrobial efficacy against gram-positive bacteria. This type of dual-functional coating might guide future design of micro/nanocontainer-based self-healing paint formulations.
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