Print Email Facebook Twitter Towards weathering and corrosion resistant, self-warning and self-healing epoxy coatings with tannic acid loaded nanocontainers Title Towards weathering and corrosion resistant, self-warning and self-healing epoxy coatings with tannic acid loaded nanocontainers Author Wang, Jinke (University of Science and Technology Beijing) Tan, Weimin (Changzhou Paint and Coatings Industry Research Institute Limited Liability Company) Yang, Hao (University of Science and Technology Beijing) Rao, Xingxing (Changzhou Paint and Coatings Industry Research Institute Limited Liability Company) Luo, Xinliang (Changzhou Paint and Coatings Industry Research Institute Limited Liability Company) Ma, Lingwei (University of Science and Technology Beijing) Ren, Chenhao (University of Science and Technology Beijing) Mol, J.M.C. (TU Delft Team Arjan Mol) Zhang, Dawei (University of Science and Technology Beijing) Date 2023 Abstract In this work, an active protective epoxy coating with weathering resistant, corrosion-warning, and self-healing properties was developed by incorporating tannic acid (TA) loaded mesoporous silica (MSN-TA) nanocontainers. The introduction of MSN-TA nanocontainers could alleviate the coating degradation via scavenging the radicals generated during UV irradiation. Compared with the blank coating, the coating containing 5 wt.% MSN-TA nanocontainers exhibited much less degradation in surface morphology, wettability and glossiness, and maintained a good barrier property after 384 h of accelerated weathering. Once the coating was damaged, the released TA could react with the Fe3+ ions to form a chelate that endowed the coating scratch with a visible black coloration, i.e. triggering a self-warning capability to indicate the initial onset of corrosion. In addition, the generated chelate could inhibit extensive corrosion propagation, offering a significant self-healing effect demonstrated by the stabilized impedance modulus values during 28 days of immersion in NaCl solution. To reference this document use: http://resolver.tudelft.nl/uuid:75e42c32-4a70-4cc3-9497-7bceabd95855 DOI https://doi.org/10.1038/s41529-023-00360-7 ISSN 2397-2106 Source npj Materials Degradation, 7 (1) Part of collection Institutional Repository Document type journal article Rights © 2023 Jinke Wang, Weimin Tan, Hao Yang, Xingxing Rao, Xinliang Luo, Lingwei Ma, Chenhao Ren, J.M.C. Mol, Dawei Zhang Files PDF s41529_023_00360_7.pdf 7.06 MB Close viewer /islandora/object/uuid:75e42c32-4a70-4cc3-9497-7bceabd95855/datastream/OBJ/view