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Organic, solvent-free polyamic acid sizing was coated onto T300 grade carbon fibers (3k) to prepare a polyimide (PI) coating having a high thermal stability and oxidative resistance. The surface of PI-coated carbon fibers was characterized by FTIR and SEM. The mechanical strength of the carbon fibers, thermal stability and oxidative resistance of the coating were also investigated. Results indicate...
Polyacrylonitrile-based carbon fiber bundles, with two sides fixed, were heated in a graphitization furnace with temperature profiles similar to those used in the preparation of carbon/carbon composites. The microstructure of the microvoids formed was characterized by small-angle X-ray scattering and high resolution transmission electron microscopy (HR-TEM). Results showed that the average radius...
Graphene oxide (GO) was employed as the sizing agent for continuous carbon fiber (CF) tows by an electrophoretic deposition and subsequent thermal annealing. The GO sheets were tightly coated and covalently attached to CF surfaces. Such reduced GO-deposited CFs exhibit a significant increase in surface roughness as compared to the bare CFs, which leads to an improvement in the interfacial shear strength...
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