Journal
JOURNAL OF MATERIALS SCIENCE
Volume 55, Issue 32, Pages 15467-15480Publisher
SPRINGER
DOI: 10.1007/s10853-020-05129-w
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Funding
- National Natural Science Foundation of China, Shanxi Province [U1810116]
- Applied Fundamental Research Project of Shanxi Province [201901D211587]
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To improve the interfacial properties between carbon fibers (CFs) and polycarbonate (PC) resin, multi-walled carbon nanotubes (MWCNTs) were deposited onto desized CF surfaces using an ultrasonic-assisted electrophoretic deposition method, forming a multi-scaled hierarchical structure. The results showed that morphologies and geometrical structures of the as-prepared hierarchical structures could be readily tailored by varying in length and concentration of the CNT suspension. The optimum conditions were determined to be CNT length of 1-5 mu m with suspension concentration of 0.5-1 wt%. A post-treatment, in combination of a polymer binder and laser irradiation, was followed to solidify the morphology and geometry of the CNT network structures formed by the CNTs with length 1-5 mu m, which allowed a 22.9% +/- 1.6% improvement in the interfacial bonding strength than that without the post-treatment and 68.1% +/- 2.3% improvement than bare CF, evaluated by a single-filament fragmentation test. It was the well-defined CNT porous network structures that are favorable for thermoplastic resin infiltration through channels for resin flow and capillary action, thus enhancing the composite interfacial properties.
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