NC State
BioResources
Shang, J., Lin, J., Zhao, G., Zhang, J., Su, Z., and Guo, S. (2015). "Effects of time and chemical curing temperature on the properties of liquefied wood-based precursors and carbon fibers," BioRes. 10(4), 7477-7488

Abstract

Liquefied wood-based precursors and carbon fibers were prepared by various chemical curing processes to investigate the effects of curing time and temperature on the thermostability and tensile strength of carbon fibers. The primary fibers can be converted into high-performance precursors by directly heating at a targeted curing temperature. With the temperature and duration increasing, the number of methylene bonds in the precursors increased, resulting in the enhancement of cross-linkages among molecular chains and the improvement of the thermostability of the precursors. Carbon fibers prepared from the precursors (95 °C and curing time 3 h) exhibited the minimum value in the average interlayer spacing (d002); however, they displayed the highest tensile strength, at almost 800 MPa, which can be classified as fibers of general grade.
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