Carbon fibers from dry-spinning of acetylated softwood kraft lignin

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• 作者：Meng Zhang ; Amod A. Ogale
• 刊名：Carbon
• 出版年：April, 2014
• 年：2014
• 卷：69
• 期：Complete
• 页码：626-629
• 全文大小：745 K

文摘

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 (鈭? 渭m diameter) displayed a tensile modulus, strength, and strain-to-failure values of 52 卤 2 GPa, 1.04 卤 0.10 GPa, and 2.0 卤 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.