Preparation and characterization of isotropic pitch-based carbon fiber

Zhu, Jiadeng; Joh, Han‐Ik; Kim, Hwan Chul; Lee, Sungho

doi:10.5714/cl.2013.14.2.094

Cited by 45 publications

(16 citation statements)

References 30 publications

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“…According to previous reports, the crystallinity of PANbased and aramid-based CFs increased as the carbonization temperature increased [10,11]. However, the crystallinity of pitch-based CFs exhibited an opposite trend in carbonization temperatures below 1000 o C [9,[14][15][16]. Namely, the crystallinity of the pitch decreased with carbonization temperatures in the range of 700-1000 o C; however, it increased eventually with a further increase in the carbonization temperature over 1000 o C. A proper explanation about this phenomenon could hardly be found.…”

Section: Characterization Of the Carbonized Pitch Fiber And Carbonizementioning

confidence: 75%

“…CF process techniques consist of fiber spinning, stabilization, and carbonization, and the effects of fiber spinning and thermal processes on fiber structure have been widely investigated. Although previous studies have mostly focused on the stabilization process [4][5][6][7][8], there have been only a few reports focusing on the carbonization process [8][9][10][11]. During the carboniza-flow in a temperature range of 500-1100 o C to compare the effect of the carbonization temperature on the crystallinity of the pitch samples with different forms (fiber and powder).…”

Section: Introductionmentioning

confidence: 99%

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Effect of carbonization temperature on crystalline structure and properties of isotropic pitch-based carbon fiber

Kim¹,

Roh²,

Kim³

2017

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Isotropic pitch-based fibers produced from coal tar pitch with the melt-blowing method were carbonized at temperatures ranging from 800 to 1600 o C to investigate their crystalline structure and physical properties as a function of the carbonization temperature. The in-plane crystallite size (L a ) of the carbonized pitch fiber from X-ray diffraction increased monotonously by increasing the carbonization temperature resulting in a gradual increase in the electrical conductivity from 169 to 3800 S/cm. However, the variation in the d 002 spacing and stacking height of the crystallite (L c ) showed that the structural order perpendicular to the graphene planes got worse in carbonization temperatures from 800 to 1200 o C probably due to randomization through the process of gas evolution; however, structural ordering eventually occurred at around 1400 o C. For the carbonized pitch powder without stabilization, structural ordering perpendicular to the graphene planes occurred at around 800-900 o C indicating that oxygen was inserted during the stabilization process. Additionally, the shear stress that occurred during the melt-blowing process might interfere with the crystallization of the CPF.

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Section: Characterization Of the Carbonized Pitch Fiber And Carbonizementioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Effect of carbonization temperature on crystalline structure and properties of isotropic pitch-based carbon fiber

Kim¹,

Roh²,

Kim³

2017

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“…It is found that a significant weight was gained in the stabilized fibers (≈10.5%) because oxygen atoms diffuse into the fibers to induce thermosetting [23]. This crosslinking reaction helps the fibers maintain their shape and allows them to be carbonized in the following process without inter-filament fusing [24]. It is interesting to note that the fibers having graphene exhibit lower stabilization yield than that of the neat pitch-based fiber.…”

Section: Resultsmentioning

confidence: 99%

Facile Preparation and Characterization of Carbon Fibers with Core-Shell Structure from Graphene-Dispersed Isotropic Pitch Compounds

et al. 2019

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In this study, isotropic pitch-based carbon fibers were prepared from a mixture of petroleum residue and graphene nanoplatelets with different contents. The softening point and synthetic yield of synthesized isotropic pitches were analyzed and compared to characterize the nature of the pitches. The surface and thermal characteristics of the fibers were observed using scanning electron microscopy and thermogravimetric analysis (TGA), respectively. From the results, it was observed that the prepared carbon fibers had an interesting core-shell structure. In the TGA analysis with air, the carbon fiber having 0.1 wt.% of graphene showed a higher residue yield than that of the sample having 1.0 wt.% of graphene. This result can be explained due to the graphene being placed on the surface region of the carbon fibers and directly helping to increase the surface area of the carbon fibers, resulting in rapid oxidation due to the enhanced contact area with oxygen.

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“…The production of carbon fiber from pitch can result in cost reductions or very high properties with an additional processing step. Therefore, efforts to produce carbon fiber using pitch have flourished in recent years [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Pitch-based carbon fibers from coal tar or petroleum residue under the same processing condition

Kim¹,

Im²,

Lee³

et al. 2016

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Spinnable pitches and carbon fibers were successfully prepared from petroleum or coal pyrolysis residues. After pyrolysis fuel oil (PFO), slurry oil, and coal tar were simply filtered to eliminate the solid impurities, the characteristics of the raw materials were evaluated by elemental analysis, 13 C nuclear magnetic resonance spectrometer, matrix-assisted laser desorption/ionization time-of-flight mass spectrometer (MALDI-TOF-MS), and so on. Spinnable pitches were prepared for melt-spinning carbon fiber through a simple distillation under strong nitrogen flow, and further vacuum distillation to obtain a high softening point. Carbon fibers were produced from the above pitches by single-hole melt spinning and additional heat treatment, for oxidization and carbonization. Even though spinnable pitches and carbon fibers were processed under the same conditions, the melt-spinning and properties of the carbon fiber were different depending on the raw materials. A fine carbon fiber could not be prepared from slurry oil, and the different diameter carbon fibers were produced from the PFO and coal tar pitch. These results seem to be closely correlated with the initial characteristics of the raw materials, under this simple processing condition.

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Preparation and characterization of isotropic pitch-based carbon fiber

Cited by 45 publications

References 30 publications

Effect of carbonization temperature on crystalline structure and properties of isotropic pitch-based carbon fiber

Effect of carbonization temperature on crystalline structure and properties of isotropic pitch-based carbon fiber

Facile Preparation and Characterization of Carbon Fibers with Core-Shell Structure from Graphene-Dispersed Isotropic Pitch Compounds

Pitch-based carbon fibers from coal tar or petroleum residue under the same processing condition

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