The effect of stabilization on the properties of PAN-based carbon films

Ko, Tse‐Hao; Yang, Ching-Chyuan; Wen-Tong, Chang

doi:10.1016/0008-6223(93)90113-o

Cited by 19 publications

(5 citation statements)

References 36 publications

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“…However, the use of the most efficient TOS processes for a certain PAI does not guarantee the highest carbon yield after the following carbonization and graphitization processes. Additional oxygen uptake during TOS may lead to the emission of oxygen during the anaerobic carbonization and graphitization reactions, which would be harmful for the carbon yield . A quantitative investigation of the effect of IA content on PAI for the ultimate graphitization reaction will be the next research goal of our group.…”

Section: Results and Discussionmentioning

confidence: 99%

“…13 However, excessive amount of IA (PAI-4 and PAI-7) resulted in lower amounts of cyclization and oxygen uptake reactions (Figure 6a,b). 50,51 Probably, excessive amount of IA in PAI inhibited intra/intermolecular ionic propagation reaction of the cyclization through blocking the H-transfer reaction (Figure 7).…”

Section: (%) 100(%)mentioning

confidence: 99%

“…Additional oxygen uptake during TOS may lead to the emission of oxygen during the anaerobic carbonization and graphitization reactions, which would be harmful for the carbon yield. 51 A quantitative investigation of the effect of IA content on PAI for the ultimate graphitization reaction will be the next research goal of our group.…”

Section: (%) 100(%)mentioning

confidence: 99%

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Structural Evolution of Poly(acrylonitrile-co-itaconic acid) during Thermal Oxidative Stabilization for Carbon Materials

2013

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Fourier transform infrared spectroscopy (FT-IR) is employed for the quantitative tracking of the structural evolution of poly(acrylonitrile-co-itaconic acid) (PAI) with different itaconic acid (IA) contents during its thermal oxidative stabilization (TOS). The TOS process includes cyclization, oxidation and tautomerization, as characterized by the evolution of the overlapping peaks of cyclic CC, CN, N–H and CO vibrations in FT-IR. The second derivatives of the spectra facilitate the identification of the position of each contributing structure. The following peak-fitting operations and the determination of the molar absorption coefficients using model compounds allow the quantitative tracking of the extent of the TOS process. PAI containing approximately 3 mol % IA exhibits the most efficient TOS process in terms of cyclization, oxygen uptake and dehydrogenation reactions. A quantitative investigation of the evolution of PAI using FT-IR is an efficient way to determine the optimal structural characteristics of the precursors for carbon materials.

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Section: Results and Discussionmentioning

confidence: 99%

Section: (%) 100(%)mentioning

confidence: 99%

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Structural Evolution of Poly(acrylonitrile-co-itaconic acid) during Thermal Oxidative Stabilization for Carbon Materials

2013

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“…Thermal stabilization is a time-consuming and exothermic process due to the slow diffusion rate of O 2 into the polymeric fibers, particularly those with diameters $10 lm [18,19]. As a result, the reaction rate and process time must be controlled for homogeneous stabilization.…”

Section: Resultsmentioning

confidence: 99%

Continuous and rapid stabilization of polyacrylonitrile fiber bundles assisted by atmospheric pressure plasma for fabricating large-tow carbon fibers

Kim

Lee

Park

et al. 2015

Carbon

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“…As one promising member in the membrane family, carbon membranes have attracted extensive attention for their excellent gas separation performance and stability in harsh conditions . Although carbon membranes can be fabricated from numerous polymeric materials, including polyimides (PIs), poly(furfuryl alcohol) (PVA), phenolic resin, polyacrylonitrile (PAN), etc., PIs are proved to be one of the most outstanding precursors . However, prior to preparation, researchers have to identify the exact thermal properties of PIs, either thermosetting or thermoplastic, which heavily determine the subsequent fabrication process and economics .…”

Section: Introductionmentioning

confidence: 99%

Facile preparation of ODPA‐ODA type polyetherimide‐based carbon membranes by chemical crosslinking

Zhang

et al. 2017

J of Applied Polymer Sci

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A chemical crosslinking protocol was developed to prepare carbon membranes from 3,3 0 ,4,4 0 -oxydiphthalic dianhydride-4,4 0 -oxydianiline (ODPA-ODA) type polyetherimide on the support of phenolic resin sheets. The effects of support pretreatment, membrane-coating methods and crosslinking protocols on the resultant carbon membranes were investigated. The microstructure, functional group evolution, thermal stability, mechanics, morphology, and gas separation performance of samples were characterized by XRD, FTIR, TGA, mechanical testing technique, and gas permeation technique, respectively. Results have shown that the chemical crosslinking is more beneficial than the popular thermal crosslinking protocol to fabricate supported carbon membranes for the advantage of simple preparation process. In addition, spin-coating is superior to drop-coating in terms of good membrane formation on the support. Under the preferred preparation conditions of crosslinker ethylene glycol usage at 10 wt % and spin-coating, supported carbon membranes can be obtained with good hydrogen separation performance.

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The effect of stabilization on the properties of PAN-based carbon films

Cited by 19 publications

References 36 publications

Structural Evolution of Poly(acrylonitrile-co-itaconic acid) during Thermal Oxidative Stabilization for Carbon Materials

Structural Evolution of Poly(acrylonitrile-co-itaconic acid) during Thermal Oxidative Stabilization for Carbon Materials

Continuous and rapid stabilization of polyacrylonitrile fiber bundles assisted by atmospheric pressure plasma for fabricating large-tow carbon fibers

Facile preparation of ODPA‐ODA type polyetherimide‐based carbon membranes by chemical crosslinking

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