Surface functionalization of carbon fibers with active screen plasma

Abstract

The active screen plasma technology was used to functionalize carbon fibers and vitreous carbon disks. The plasma treatment conditions were mapped using optical emission spectroscopy and the functionalized surfaces were analyzed using scanning electron microscopy and atomic force microscopy, x-ray photoelectron spectroscopy, and contact angle measurements. A relationship was found between the active species in the plasma and the functional groups attached to the carbon surfaces, which provides valuable information for the optimization of the active screen plasma treatment. Moreover, the surface analyses were repeated over a period of 28 days to study the aging of the functionalized surfaces in air. The hydrophobic recovery was modeled using a surface restructuring theory which revealed a mean lifetime of 3.4 days for the functional groups. V

Enhanced properties of PAN‐derived carbon fibres and resulting composites by active screen plasma surface functionalisation

“…[ 15 ] This is because the cathode potential is applied to the active screen rather than to the samples to be treated and hence there is no direct ion bombardment to the sample surface during ASP treatment. Therefore, a feasibility study has been conducted by Gallo et al [ 16 ] to explore the potential of ASP for the surface treatment of CFs. Although the preliminary work has revealed functionalised hydrophilic CF surfaces, it is not clear, if and how ASP treatment affects the strength of CFs.…”

A Facile Nitriding Approach for Improved Impact Wear of Martensitic Cold-Work Steel Using H2/N2 Mixture Gas in an AC Pulsed Atmospheric Plasma Jet

“…In Figure 6a, the spectral characteristics between 200 and 900 nm from 2% H 2 /N 2 plasma exposure were identified using NIST reference data [35]. Figure 6b shows that the results of the obtained emission intensities for NH (336 nm), N 2 (295.3 nm, 314.2 nm, 337 nm, 355.9 nm, 374.1 nm, 378.9 nm, 387.9 nm, 398.4 nm, and 404.7 nm), and N 2 + (352.5 nm and 391 nm) lines [36][37][38][39] are quite consistent with the ion nitriding processes using H 2 /N 2 mixture gases and NH 3 gas [8]. The major peak around 336 nm is the overlapping peaks of both NH emission and N 2 emission.…”

Pulsed Laser Deposition of SWCNTs on Carbon Fibres: Effect of Deposition Temperature

“…Chemical functionalization such as wet oxidation produces active polar groups on the fibre surface [ 5 ]. Other forms of oxidation include dry gaseous oxidation such as air plasma treatments, which also produce active polar chemical groups on the fibre surface [ 8 , 9 ]. Active groups formed on the fibre surface are then covalently or physically bonded to the matrix during curing of the system.…”