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负载环氧树脂的十八烷基胺负载乙基纤维素微胶囊涂层的性能及耐腐蚀机理

Properties and corrosion resistance mechanism of a self-healing octadecyl amine loaded ethyl cellulose microcapsule coatings loaded with epoxy resin.

作者信息

Cao Qidong, Kang Shumei, Lu Chenshuo, Sun Dongpeng, Li Jinghao, Chen Hong, Li Xintong

机构信息

School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan, 114051, China.

出版信息

Sci Rep. 2025 Jan 9;15(1):1386. doi: 10.1038/s41598-025-85282-x.

DOI:10.1038/s41598-025-85282-x
PMID:39779802
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11711196/
Abstract

In order to provide long-term anti-corrosion properties of the coatings on the substrate, a microcapsule self-healing coatings system was designed in this paper. Microcapsules were synthesized with ethyl cellulose and octadecyl amine, which were added to epoxy resin to prepare self-healing coatings. The shape of microcapsules was spherical, the average particle size of microcapsules was about 100-120 μm, and the average thickness of microcapsules was 4.43 μm, which was conducive to the preparation of the coatings. The initial evaporation temperature of the microcapsules was 165℃. The ethyl cellulose organic crosslinked shell enhances the strength of the microcapsules and improves the thermal stability of the microcapsules. Electrochemical impedance spectroscopy showed that the impedance of the coatings with 6 wt% microcapsules was about 2.68 × 10 Ω/cm, which was 2 orders of magnitude higher than that of the coatings without microcapsules (5.23 × 10 Ω/cm). Scanning electron microscope was used to observe the artificial scratches of the coatings for 24 h, and it was found that the microcapsule could repair the artificial scratches of the coatings well. The results showed that the addition of microcapsules can improve the anti-corrosion properties of the coatings.

摘要

为了使涂层在基体上具有长期防腐性能，本文设计了一种微胶囊自修复涂层体系。以乙基纤维素和十八胺合成微胶囊，并将其添加到环氧树脂中制备自修复涂层。微胶囊形状为球形，平均粒径约为100 - 120μm，平均壁厚为4.43μm，有利于涂层的制备。微胶囊的初始蒸发温度为165℃。乙基纤维素有机交联壳增强了微胶囊的强度，提高了微胶囊的热稳定性。电化学阻抗谱表明，含6 wt%微胶囊的涂层阻抗约为2.68×10Ω/cm，比不含微胶囊的涂层（5.23×10Ω/cm）高2个数量级。利用扫描电子显微镜观察涂层人工划痕24 h，发现微胶囊能很好地修复涂层的人工划痕。结果表明，微胶囊的加入可提高涂层的防腐性能。

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本文引用的文献

1
Corrosion-Responsive Self-Healing Coatings.腐蚀响应型自修复涂层
Adv Mater. 2023 Nov;35(47):e2300101. doi: 10.1002/adma.202300101. Epub 2023 Sep 29.