1. Optimizing mechanical properties and corrosion resistance in core-shell nanofiber epoxy self-healing coatings: Impact of shell material variation
- Author
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Xu, Yangbo, Shen, Rulin, Tang, Juntao, Zou, Xiangfu, Wan, Wenhu, and Guo, Haibo
- Subjects
Polyvinylidene fluoride -- Usage ,Air-turbines -- Usage ,Epoxy resins -- Comparative analysis -- Usage -- Mechanical properties ,Corrosion and anti-corrosives -- Mechanical properties -- Usage -- Comparative analysis ,Coatings -- Usage ,Engineering and manufacturing industries ,Science and technology - Abstract
Shell materials play significant impact on corrosion resistance and mechanical properties on self-healing coating of composite with core-shell nanofiber. In this paper, three promising shell materials were investigated to optimize the performance of self-healing coating. Self-healing core-shell nanofibers with different shell materials were prepared with coaxial electrospinning. The resulting nanofibers were used to prepare self-healing corrosion resistance coating. The tensile test revealed a notable enhancement in the tensile strength of PA6 core-shell nanofiber epoxy composite coatings compared with the epoxy coating, demonstrating increase of 26.92%. Friction and wear test indicated reductions in the friction coefficients of PAN, PVDF, and PA6 core-shell nanofibers by 13.82%, 12.44%, and 26.27%, respectively. The self-healing and anti-corrosion abilities were evaluated through electrochemical impedance spectroscopy (EIS) test. All three coatings exhibited exceptional self-healing efficiencies exceeding 90%, highlighting the substantial potential of the chosen shell materials as nanocontainers for self-healing agent. Results indicate that the nanofibers with PA6 as shell material can achieve the best enhancement performance, which has a greater potential for the corrosion protection and long-lasting use of offshore wind turbine tower coatings. Highlights * Optimizing coating performance by screening coaxial nanofibers for shell materials * Shell material can improve the tensile strength of coating up to 26.92% * Friction coefficient of PA6 nanofiber coating was about 15% lower than PAN and PVDF * All three coatings exhibited exceptional self-healing efficiencies exceeding 90% KEYWORDS coating, core-shell nanofibers, mechanical properties, self-healing, shell material, 1 | INTRODUCTION Offshore wind turbine towers are easy to be corrosive under high humidity and high salt spray marine environments. (1) Application of anti-corrosion coating with self-healing ability is [...]
- Published
- 2024
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