Optimizing of stabilization and carbonization processes for sustainable lignin-derived carbon fiber production

Carbon fibers, renowned for their exceptional strength-to-weight ratio and versatile applications, have long been pivotal in various industries. As interest grows in sustainable and cost-effective carbon fiber production, lignin emerges as a promising precursor due to its abundance from the paper and pulp industry, offering an eco-friendly alternative to petroleum-based sources. This research focuses on the crucial stabilization process for carbon fiber production. Phthalic anhydride is used as a cross-linker on extruded fibers, demonstrating effective chemical modification. Continuous research and optimization of thermal process parameters are essential for emulating a semi-continuous stabilization process, thus contributing to the efficient utilization of industrial waste streams and aligning with circular economy principles.