Researchers at Iowa State University have developed carbon fiber made from lignin, a paper industry byproduct, and aqueous bio-oil from fast pyrolysis. The material reached a tensile strength of 2.45 GPa and stiffness of 236 GPa, beating the U.S. Department of Energy's recommended specs for automotive carbon fiber. The team estimates production costs below $5 per pound and says stabilization time drops from tens of hours to 2-4 hours. That matters because carbon fiber today usually starts with petroleum-based precursors, which are expensive and carry a heavy environmental footprint. Using low-value waste streams could cut both cost and emissions, while giving the U.S. a domestic source for a material used in aircraft, wind turbine blades, and vehicle parts. The work is funded by the National Science Foundation and the team is aiming at commercialization. It is still early stage, but if the cost and performance numbers hold up during scale-up, this could be a meaningful step for low-carbon manufacturing.
