期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 101, 期 -, 页码 128-145出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2021.06.014
关键词
Core-shell fibers; Self-healing coating; Oleic acid; Hydrophobic effect
资金
- National Natural Science Foundation of China [42076039, 51801035, 51708541, 51678318]
- Natural Science Foundation of Shandong Province [ZR2020ME016]
- Applied Basic Research Programs of Qingdao [E1KY12106N]
- China Postdoctoral Science Fund [2021M693206]
- Natural Science Foundation of Guangxi Province [2018GXNSFBA138059]
- CAS-VPST Silk Road Science Fund 2021 [133137KYSB20200034]
This research focuses on the synthesis of core-shell electrospun fibers and their application in self-healing and pH-responsive coatings. The results demonstrate high self-healing efficiencies and hydrophobic properties of the fiber-PDMS composite coating.
In this research, core-shell electrospun fibers loaded with the shell of cellulose acetate and the core of oleic acid and alkyd varnish resin were synthesized and used within poly(dimethyl siloxane) (PDMS) to prepare self-healing and pH-responsive coatings for a steel substrate. The morphology of the electrospun fibers was characterized by scanning electron microscopy, transmission electron microscopy and confocal fluorescence microscopy. Thermo gravimetric analysis and Fourier transform infrared spectroscopy revealed that the self-healing agents were loaded successfully with a loading rate of 2.9%. The properties of the fiber-PDMS composite coating were characterized by water contact angle measurements, mechanical tests, electrochemical impedance spectroscopy, and scanning Kelvin probe. Results show that the maximum self-healing efficiencies of the fiber-PDMS coating in alkaline and acidic solution are 95.96% and 97.04%, respectively. The composition of the self-healing agents at the damaged part of the coating was verified by an infrared mapping test and using an energy dispersive spectrometer. In addition, the sandpaper abrasion test shows the hydrophobic effect of fiber-PDMS coating remains above 88.2% and decreases slightly through the addition of abrasion cycles. This research can pave the way for the industrial applications of pH-responsive self-healing coatings. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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