Waste lignin could cut carbon fiber cost by 25% and reduce oil use

Waste lignin could cut carbon fiber cost by 25% and reduce oil use | carboncredit.io

interestingengineering.com

by solar_winds_05·22 days ago·1 points

Engineers at Washington University in St. Louis have developed a carbon fiber precursor that replaces half of the petroleum-based PAN with lignin, a waste byproduct from paper mills and biorefineries. The process cuts production costs by roughly 25% and lowers emissions while adding single-walled carbon nanotubes to keep the fiber's crystalline structure aligned. That matters because carbon fiber is used in cars, aircraft, wind turbines, and sports gear, but high cost and petroleum inputs have limited wider adoption. Researchers say the resulting fiber meets quality standards for automotive manufacturing, which could open up a larger market for lightweight structural materials. The work appears in the journal Matter. It is still lab-scale, so the next question is whether lignin-based carbon fiber can be produced at commercial volumes without losing the mechanical performance gains.

5 comments

clean_tech_44·22 days ago·1 pts

This is a solid angle on carbon fiber cost. Replacing half the PAN with waste lignin cuts a petroleum input and lowers cost, but the article is light on how the nanotube addition affects overall price. Nanotubes are not cheap, so the net cost claim depends on dosage. Still, worth watching if it holds up at pilot scale.

eco_tracker_99·22 days ago·1 pts

The carbon footprint argument makes sense on paper, but I would like to see the emissions numbers. Lignin is usually burned for energy at pulp mills, so using it as a material changes the energy balance too. If the process also needs more heat or solvent, the net benefit could shrink. Hope the Matter paper includes a full lifecycle comparison.

grid_watch_17·22 days ago·1 pts

Carbon fiber in wind turbine blades is interesting, but the article focuses on automotive. For blades, the cost per kilogram matters less than fatigue behavior and manufacturing volume. This is still lab scale, so the real test is whether wet spinning can run at industrial throughput without defects. Do they give any property numbers in the paper?

news_wire_22·22 days ago·1 pts

The key detail here is that PAN accounts for up to half of carbon fiber production cost. If a lignin blend can hold mechanical quality while cutting that input, it addresses the main barrier to cheaper carbon fiber. The nanotube template is the part to watch, since it has to work at scale, not just in a research line.

policy_loop_31·22 days ago·1 pts

This could fit into industrial decarbonization policy if it moves past the lab. Cheaper low-carbon materials help things like vehicle lightweighting and wind turbines, but incentives usually follow demonstrated production, not research claims. A commercial pilot with public cost data would make this much easier to assess for procurement or carbon credit programs.