Characterization of surface physico-chemistry and morphology of plasma-sized carbon fiber

Abstract

Carbon fiber (CF) surfaces were prepared in order to enhance their cohesion in polymer matrixes for composite applications. Among innovative methods allowing the modification of CF surface, plasma technologies, and more specifically on plasma polymerization is known as an eco-process that allows to size, i.e. to coat the CF strands with organic polymer materials.Depending on plasma parameters and chosen organic precursors, the thin film surface physicochemistry can be tuned to enhance the plasma-processed CF surface properties. The chemical composition, as well as the effect of thin film thickness, were linked to wettability and surface free energy of the coated CF. Among the different plasma polymers, plasma-poly(acetylene) is characterized with higher deposition rate and was the most efficient for improving the wettability of CF surface. Surface chemistry and thickness appear to be the key parameter of controlling the CF surface wettability.

Research progress on the surface modification of carbon fiber

“…D. Gravis et al explored the effect of different treatment methods of plasma polymerization (gas acetylene, 109 liquid HMDSO, acid acid) on the surface free energy of CF. The results show that the surface free energy of CFs treated with different plasma-polymerization treatments was 22 mJ m −2 , which was lower than the surface free energy of untreated CF (27 mJ m −2 ).…”

Improving interfacial strength of epoxy composites by constructing “palm‐tree”‐like structure on carbon fiber

“…During the grafting process, the orderliness of the CF surface will decrease and its roughness will increase with the number of grafted graphene oxide. [48] Figure 5 shows the Raman spectroscopy test results of CFs with different D400-GO and D2000-GO coating amounts. As shown in…”

“…During the grafting process, the orderliness of the CF surface will decrease and its roughness will increase with the number of grafted graphene oxide. [48] Figure 5 shows the Raman spectroscopy test results of CFs with different D400-GO and D2000-GO coating amounts. As shown in Figure 6A is a scanning electron microscopy (SEM) image of CFs with different D400-GO and D2000-GO coating contents at Â10,000 magnification.…”

Enhanced interfacial property of carbon fiber reinforced epoxy composite based on carbon fiber treated by supercritical water/nitrate system

“…The polar functional groups on the fiber surface can react with some active functional groups in the resin matrix, which plays a positive role in improving the interfacial properties of the composites. 35 The surface energies of untreated and treated carbon fibers are listed in Table 2. After the supercritical water treatment, there were more active groups (C-O, C ¼ O, COOH/COOR) on the surface of fibers, which increased the total surface energy and polarity, compared with the surface of the untreated carbon fibers.…”