Abstract
The novel isotropic pitch that exhibits both high solvent solubility (100% soluble in THF) and a high softening point (over 200°C) was successfully synthesized by the bromination of 2-methylnaphthalene followed by dehydrobromination/polymerization and extraction in n-hexane to eliminate lighter constituents. The molecular structure of the pitch was relatively linear with flexible methylene cross-linkages between naphthalene molecules. During bromination, a reaction temperature of 180°C was necessary to induce bromine substitution of methyl hydrogen. Methylene cross-linkages were formed after the dehydrobromination reaction. The obtained pitch is a suitable precursor for electrospinning and meltspinning to prepare carbon nanofibers and carbon fibers, respectively.
Keywords: Pitch, 2-methylnaphthalene, Bromination, Dehydrobromination, Electrospinning, Carbon nanofiber, Meltspinning, Carbon fiber.
Current Organic Chemistry
Title:Preparation of Novel Isotropic Pitch with High Softening Point and Solvent Solubility for Pitch-based Electrospun Carbon Nanofiber
Volume: 17 Issue: 13
Author(s): Byung-Jun Kim, Hyunsig Kil, Naoki Watanabe, Min-Hyun Seo, Bo-Hye Kim, Kap Seung Yang, Osamu Kato, Jin Miyawaki, Isao Mochida and Seong-Ho Yoon
Affiliation:
Keywords: Pitch, 2-methylnaphthalene, Bromination, Dehydrobromination, Electrospinning, Carbon nanofiber, Meltspinning, Carbon fiber.
Abstract: The novel isotropic pitch that exhibits both high solvent solubility (100% soluble in THF) and a high softening point (over 200°C) was successfully synthesized by the bromination of 2-methylnaphthalene followed by dehydrobromination/polymerization and extraction in n-hexane to eliminate lighter constituents. The molecular structure of the pitch was relatively linear with flexible methylene cross-linkages between naphthalene molecules. During bromination, a reaction temperature of 180°C was necessary to induce bromine substitution of methyl hydrogen. Methylene cross-linkages were formed after the dehydrobromination reaction. The obtained pitch is a suitable precursor for electrospinning and meltspinning to prepare carbon nanofibers and carbon fibers, respectively.
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Kim Byung-Jun, Kil Hyunsig, Watanabe Naoki, Seo Min-Hyun, Kim Bo-Hye, Yang Seung Kap, Kato Osamu, Miyawaki Jin, Mochida Isao and Yoon Seong-Ho, Preparation of Novel Isotropic Pitch with High Softening Point and Solvent Solubility for Pitch-based Electrospun Carbon Nanofiber, Current Organic Chemistry 2013; 17 (13) . https://dx.doi.org/10.2174/1385272811317130013
DOI https://dx.doi.org/10.2174/1385272811317130013 |
Print ISSN 1385-2728 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5348 |
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