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Chemically Accelerated Stabilization of a Cellulose-Lignin Precursor as a Route to High Yield Carbon Fiber Production

Version 2 2024-06-06, 09:42
Version 1 2022-01-20, 08:10
journal contribution
posted on 2024-06-06, 09:42 authored by ND Le, M Trogen, Russell VarleyRussell Varley, M Hummel, Nolene ByrneNolene Byrne
The production of carbon fiber from bio-based or renewable resources has gained considerable attention in recent years with much of the focus upon cellulose, lignin, and cellulose–lignin composite precursor fibers. A critical step in optimizing the manufacture of carbon fiber is the stabilization process, through which the chemical and physical structure of the precursor fiber is transformed, allowing it to withstand very high temperatures. In this work, thermogravimetric analysis (TGA) is used to explore and optimize stabilization by simulating different stabilization profiles. Using this approach, we explore the influence of atmosphere (nitrogen or air), cellulose–lignin composition, and alternative catalysts on the carbon yield, efficiency, and rate of stabilization. Carbon dioxide and water vapor released during stabilization are analyzed by Fourier transform infrared (FTIR) spectroscopy, providing further information about the stabilization mechanism and the accelerating effect of oxygen and increased char yield (carbon content), especially for lignin. A range of different catalysts are evaluated for their ability to enhance the char yield, and a phosphorus-based flame retardant (H3PO4) proved to be the most effective; in fact, a doubling of the char yield was observed.

History

Journal

Biomacromolecules

Volume

23

Article number

acs.biomac.1c01226

Pagination

839-846

Location

United States

ISSN

1525-7797

eISSN

1526-4602

Language

English

Publication classification

C1 Refereed article in a scholarly journal

Issue

3

Publisher

AMER CHEMICAL SOC

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