Paper-making waste could slash carbon fiber costs 25% while cutting petroleum use

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🗞️ Driving the news: Engineers at Washington University in St. Louis have developed a carbon-fiber precursor that replaces 50% of petroleum-derived polyacrylonitrile (PAN) with lignin, a renewable byproduct of paper production and biorefineries
• Single-walled carbon nanotubes are added to improve molecular alignment and mechanical performance, with the team reporting a 25% reduction in production costs

🔭 The context: PAN can represent up to half of carbon-fiber manufacturing costs and is derived from petroleum
• The researchers combine lignin and PAN through wet spinning, followed by heat treatment and carbonization, using nanotubes to help create the highly aligned crystalline structure required for demanding applications such as automotive components

🌍 Why it matters for the planet: Using waste lignin could reduce demand for petroleum-derived feedstocks while giving a higher-value use to a material often burned for energy
• Lower-cost carbon fiber could also support lightweighting in vehicles and other applications, although the overall climate benefit depends on the full production lifecycle and eventual use

⏭️ What’s next: The researchers are targeting automotive applications first, with potential uses in wind turbines, aerospace, sports equipment and energy infrastructure
• Further development would determine whether the material can be produced at commercial scale while consistently meeting performance and cost requirements

💬 One quote: “For the first time, this allows us to create renewable carbon fiber that reaches the high standard of quality used in automobile manufacturing.” — Joshua Yuan, Washington University in St. Louis

📈 One stat: 50% — the share of petroleum-based PAN replaced in the researchers’ carbon-fiber precursor.

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