期刊
COMPOSITES COMMUNICATIONS
卷 19, 期 -, 页码 220-225出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.coco.2020.04.007
关键词
Self-healing; Core-shell fibre; Corrosion protection; Waterborne polyurethane; Polymer matrix composites
资金
- National Natural Science Foundation of China [U1560108, U1760119]
- Science and Technology Commission of Shanghai Municipality [17511101603, 17XD1403000, 18ZR1426300, 19JC1410400]
- Shanghai Municipal Education Commission [2019-01-07-00-07E00015]
Core-shell fibres encapsulating epoxy monomer and curing agent were fabricated using coaxial electrospinning. Composite coatings with repeated self-healing properties were prepared by infiltrating waterborne polyurethane matrix into the core-shell fibre preform. Once cracks appeared at the same spot repeatedly, the electrospun fibre can supply healing agents to the cracks continuously, until the encapsulated healing agents were consumed. According to the morphology observation and Tafel tests, the composite coatings with a fibre content of 40.4 wt % can heal the cracks repeatedly and spontaneously for three times. After the three-times repeated healing, the self-healing efficiency remained at 99.34% according to the Tafel tests.
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