pH-responsible self-healing performance of coating with dual-action core-shell electrospun fibers

Publication date: Available online 24 August 2019Source: Journal of the Taiwan Institute of Chemical EngineersAuthor(s): Xiaohong Ji, Wei Wang, Weihua Li, Xia Zhao, Ang Liu, Xin Wang, Xiaoying Zhang, Weijie Fan, Yanli Wang, Zhaoxia Lu, Shuan Liu, Hao ShiAbstractpH-responsible self-healing core-shell electrospun nanofibers encapsulating oleic acid (OA) and benzotriazole (BTA) corrosion inhibitors were synthesized and added into a coating material for the corrosion protection of carbon steels. The shell of electrospun nanofibers were poly(vinyl alcohol) (PVA), and the healing agents OA and BTA were used as core materials to reseal a damaged region. The average nanofiber diameters was 350 nm, and the surface is smooth, without any bead structure. OA plays a critical role on corrosion inhibitor in 3.5% alkaline sodium chloride solution and the maximum inhibition efficiency was 86.0% after 10 days immersion. BTA works in 3.5% acidic sodium chloride solution and the maximum inhibition efficiency was 83.4% after 5 days immersion. The anti-corrosion and self-healing capability of core-shell coating were evaluated through scanning electron microscopy, transmission electron microscopy, confocal laser fluorescence microscopy, Fourier transform infrared spectroscopy, electrochemical measurement technology, thermo gravimetric analysis, and material test system rack. Results showed that core-shell spinning fibers with corrosion inhibitors at different concentrations were prepared success...
Source: Journal of the Taiwan Institute of Chemical Engineers - Category: Chemistry Source Type: research