Guo, J, Li, X, Xu, H et al. (3 more authors) (2020) Molecular Structure Control in Mesophase Pitch via Co-Carbonization of Coal Tar Pitch and Petroleum Pitch for Production of Carbon Fibers with Both High Mechanical Properties and Thermal Conductivity. Energy and Fuels. ISSN 0887-0624
Abstract
Spinnable mesophase pitches C-MP, P-MP, and C/P-MP were synthesized from coal tar pitch, petroleum pitch, and their cocarbonized pitches, respectively. The molecular structures of these mesophase pitches and their effect on the microcrystalline sizes of the mesophase and the properties of carbon fibers derived from them were comparatively investigated. The molecular structures and orientation of the prepared mesophase pitches have significant influence on the performance of resultant carbon fibers. In comparison with P-MP and C/P-MP, C-MP possessing the highest aromaticity, a rigid molecular structure, and a very small amount of methyl groups makes C-MP-CFs with smaller crystal size and lower decomposition during the preparation process and thus results in the best mechanical properties of their carbon fibers, consequently. The prepared P-MP, however, containing abundant methyl groups and possessing a semirigid molecular structure, yields products with higher d002-spacing and larger mesomorphic phase size. The largest crystallite dimension of P-MP combined with its higher molecular orientation makes P-MP-CFs possessing the highest crystal size and axial thermal conductivity. On the other hand, C/P-MP shows the molecular structure character of both coal tar pitch and petroleum pitch and a tunable mesophase domain orientation. The carbon fiber prepared from cocarbonized C/P-MP shows both good mechanical properties, like C-MP-based fiber, and, in particular, ultrahigh thermal conductivity, like P-MP-based fiber.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 American Chemical Society. This is an author produced version of an article published in Energy and Fuels. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 07 May 2020 11:15 |
Last Modified: | 05 May 2021 00:38 |
Status: | Published online |
Publisher: | American Chemical Society |
Identification Number: | 10.1021/acs.energyfuels.0c00196 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:160330 |