Abstract: ［Objective］To effectively provide early warning of coating damage，metal substrate corrosion，and extend the service life of organic coatings.［Methods］Using electrospinning technology， polyacrylonitrile（PAN）core-shell nanofibers loaded with 8-hydroxyquinoline（8-HQ）and fluorescein（FL）were prepared，and epoxy resin was drop-coated onto the fiber surface to obtain a fiber-resincomposite coating. The morphology of the nanofibers was observed by scanning electron microscopy（SEM）and transmission electron microscopy（TEM）. The chemical composition of the nanofibers wasstudied using Fourier transform infrared spectroscopy（FT-IR）and thermogravimetric analysis. The release performance of the loaded materials and the corrosion inhibition performance of 8-HQ in the fibers were investigated using ultraviolet absorption spectroscopy and laser confocal scanning microscopy（CLSM）. The anticorrosion performance of the coating was studied using SEM，energy dispersive spectroscopy（EDS）， X-ray photoelectron spectroscopy（XPS）， and electrochemical impedance spectroscopy（EIS）.［Results］ The PAN@8-HQ/FL nanofibers exhibited uniform fiber diameters and a layered core-shell structure，and were successfully loaded with 8-HQ/FL，showing good release performance. According to EIS results，the damaged composite coating had a corrosion inhibition efficiency of 95. 1% after 144 hours，demonstrating excellent anticorrosion performance.［Conclusion］The study found that when only the composite coating was damaged，the released FL could emit green fluorescence under UV light. When the damage reached the metal substrate，the 8-HQreleased from the damaged composite coating could form a black complex with Fe3 . generated bycorrosion，filling the microcracks after coating damage and providing a corrosion-isolating effect，thus achieving dual functions of layered self-warning and corrosion inhibition for microscopic coatingdamage.

Key words: electrospinning, metal anti-corrosion, self-reporting, corrosion inhibition, coatings, electrochemical impedance spectroscopy

摘要： 【目的】为了有效预警涂层损伤、金属基材腐蚀以及延长有机涂层的使用寿命。【方法】利用静电纺丝技术，制备了负载 8-羟基喹啉（ 8-HQ）和荧光素（ FL）的聚丙烯腈（ PAN）核壳纳米纤维（ PAN@8-HQ/FL）将环氧树脂滴涂到纤维表面，得到纤维树脂复合涂层。通过扫描电镜（ SEM）和透射电镜（ TEM）观察纳米纤维的，形貌，利用傅立叶变换红外光谱仪（ FT-IR）研究了纳米纤维的化学组成，利用紫外吸收光谱和激光共聚焦扫描显微镜（ CLSM）研究了纤维中负载材料的释放性能和 8-HQ的缓蚀性能，使用 SEM、能谱仪（ EDS）、 X射线光电子能谱仪（ XPS）和电化学阻抗谱（ EIS）研究了涂层的缓蚀性能。【结果】 PAN@8-HQ/FL具有直径均匀的纤维形貌以及内外分层的核壳结构，并成功负载 8-HQ/FL，表现出良好的释放性能。根据 EIS测试结果，损伤的复合涂层在 144 h后的缓蚀效率为 95. 1%，显示出良好的缓蚀性能。【结论】当只有复合涂层受到损伤时，在紫外光照射下，释放的 FL可以发出绿色荧光；当损伤深度到达基材金属时，复合涂层中受损释放的 8-HQ可以与腐蚀产生的 Fe3+形成黑色络合物，填补涂层损伤后的微裂纹，起到隔离腐蚀性物质继续侵蚀基底的缓蚀效果，从而实现涂层微观损伤的分层自预警与缓蚀双功能。

关键词: 静电纺丝, 金属防腐, 自预警, 缓蚀, 涂层, 电化学阻抗谱

CLC Number: 

• TQ635. 2