Preparation of pitch from pyrolized fuel oil by electron beam radiation and its melt-electrospinning property

Abstract

Spinnable pitch for melt-electrospinning was obtained from pyrolized fuel oil by electron beam (E-beam) radiation treatment. The modified pitch was characterized by measuring its elemental composition, softening point, viscosity, molecular weight, and spinnability. The softening point and viscosity properties of the modified pitch were influenced by reforming types (heat or E-beam radiation treatment) and the use of a catalyst. The softening point and molecular weight were increased in proportion to absorbed doses of E-beam radiation and added AlCl 3 due to the formation of pitch by free radical polymerization. The range of the molecular weight distribution of the modified pitch becomes narrow with better spinning owing to the generated aromatic compounds with similar molecular weight. The diameter of melt-electrospun pitch fibers under applied power of 20 kV decreased 53% (4.7 ± 0.9 μm) compared to that of melt-spun pitch fibers (10.2 ± 2.8 μm). It is found that E-beam treatment for reforming could be a promising method in terms of time-savings and cost-effectiveness, and the melt-electrospinning method is suitable for the preparation of thinner fibers than those obtained with the conventional melt-spinning method.

Stabilization of pitch-based carbon fibers accompanying electron beam irradiation and their mechanical properties

“…The pyrolyzed fuel oil (PFO) used in the reforming pitch was supplied by the GS Caltex Refinery Company in Korea and the obtained isotropic pitch had a softening point of 250°C. The pitch reforming procedure, which consisted of a subsequent distillation and thermal treatment, has been previously described [11,12]. In the melt-spinning method, a metal-syringe apparatus with a 10 g sample capacity was used to extrude the melted pitch through a mono-hole spinneret with a diameter of 0.1 mm.…”

Electron beam irradiation treatment of textiles materials: a review

“…This is crucially important in the radiation chemistry of the polymer and leads to the industrial application of the radiation processing of polymer. Although cross-linking and degradation may take place to some extent at the same time, one of them must predominate [46][47][48][49].…”

Effects of E‐Beam Irradiation on the Chemical, Physical, and Electrochemical Properties of Activated Carbons for Electric Double‐Layer Capacitors

“…Electron-beam (e-beam) irradiation has been of interest in many research fields, such as polymerization and the modification of polymers, lithography, and food science [1][2][3][4][5]. Electron-beam irradiation changes the structures of polymer chains, which induce chain scission, cross-linking, or radical formation [6][7][8]. Recently, some researchers have attempted to apply e-beam irradiation to various carbon materials (sp 3 or sp 2 materials), such as carbon nanotubes, graphene, and diamond [9][10][11].…”