期刊
CARBON
卷 69, 期 -, 页码 626-629出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2013.12.015
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资金
- SERDP [WP-1758]
An acetylated softwood kraft lignin was dry-spun into precursor fibers and successfully processed into carbon fibers with a tensile strength exceeding most values reported in prior studies on lignin-based carbon fibers. Limited acetylation of lignin hydroxyl groups enabled dry-spinning of the precursor using acetone (solvent) followed by thermo-oxidative stabilization. Resulting carbon fibers (similar to 7 mu m diameter) displayed a tensile modulus, strength, and strain-to-failure values of 52 +/- 2 GPa, 1.04 +/- 0.10 GPa, and 2.0 +/- 0.2%, respectively. Because of solvent diffusion during dry-spinning, fibers displayed a crenulated surface that can provide a larger specific interfacial area for enhanced fiber/matrix bonding in composite applications. (C) 2013 Elsevier Ltd. All rights reserved.
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