Tang Qingqing, Ji Cuiping, Wei Guoying, Hu Jing, Chang Feifan, Zhu Benfeng, Ren Li, Peng Dongliang
College of Materials and Chemistry, China Jiliang University, Hangzhou, 310018, P. R. China.
Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, P. R. China.
Adv Sci (Weinh). 2025 Feb;12(6):e2409751. doi: 10.1002/advs.202409751. Epub 2024 Dec 18.
Self-healing materials have been extensively explored in metal anti-corrosion fields. However, improving the self-healing efficiency remains a significant work that severely limits their further development. Here, a strategy to fabricate anti-corrosion coatings with efficient self-healing properties based on microfluidic electrospinning technologies and UV-curable healing agents is reported. The damaged composite coating contains core-shell nanofibers that can be completely healed within only 30 min, indicating an outstanding healing efficiency. The corrosion current density (I) of the composite coatings containing core-shell nanofibers (abbreviated as composite coatings) is lower than the coatings without any fibers (abbreviated as pure resin coatings) during the test of repeated damage and healing cycles, showing superior resistance to corrosion and repeated self-healing property. The composite coating has even better mechanical properties such as tensile strength, bending strength, and impact strength than the pure resin coating, which are explained by simulating the deformation process. These excellent properties greatly improve the practicability of self-healing coatings in the application of anti-corrosion, especially in some special fields.
自修复材料在金属防腐领域已得到广泛研究。然而，提高自修复效率仍是一项重大工作，严重限制了它们的进一步发展。在此，报道了一种基于微流控静电纺丝技术和紫外光固化修复剂制备具有高效自修复性能防腐涂层的策略。受损的复合涂层包含核壳纳米纤维，仅需30分钟即可完全修复，显示出卓越的修复效率。在重复损伤和修复循环测试中，含核壳纳米纤维的复合涂层（简称为复合涂层）的腐蚀电流密度（I）低于无纤维涂层（简称为纯树脂涂层），表现出优异的耐腐蚀性能和重复自修复性能。复合涂层在拉伸强度、弯曲强度和冲击强度等力学性能方面甚至比纯树脂涂层更好，通过模拟变形过程对此进行了解释。这些优异性能极大地提高了自修复涂层在防腐应用中的实用性，尤其是在一些特殊领域。
