Abstract
The surface of carbon fiber (CF) was modified by the electrophoretic deposition of cationic chitosan (CS), which is expected to enhance the hygrothermal and mechanical properties of carbon fiber/polyamide 6 (CF/PA 6) composites. Carbon fiber in various treatment stages was characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, atomic force microscopy, and X-ray diffraction. The studies demonstrate that the chitosan-modified carbon fiber (CS-CF) increases the surface chemical activity and roughness of carbon fiber, which enhances the chemical bonding and mechanical interlocking of carbon fiber with PA 6. Compared with desized carbon fiber (D-CF), the O/C composition ratio of CS-CF increased from 20.34 % to 50.86 %, and the tensile strength and flexural strength of the CS-CF/PA 6 composites were enhanced by 50.31 % and 43.88 %, respectively. In addition, the hygrothermal properties of CS-CF/PA 6 were also improved. Fracture observation of the composite cross-sections further elucidates the mechanism of interfacial strengthening.
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This work was supported by the National Natural Science Foundation of China (Nos. 51663006) and the Provincial Science and Technology Project of Guizhou ([2016] 1025).
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Li, L., Wu, D. & He, M. Electrophoretic Deposition of Chitosan-modified Carbon Fiber to Enhance Hygrothermal and Mechanical Properties of Carbon Fiber/Polyamide 6 Composites. Fibers Polym 21, 583–589 (2020). https://doi.org/10.1007/s12221-020-9280-6
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DOI: https://doi.org/10.1007/s12221-020-9280-6