New Method Makes Teflon Recyclable Using Sodium Metal and Mechanical Grinding

What Happened

Researchers at Newcastle University and the University of Birmingham have discovered a low-energy method to recycle Teflon (polytetrafluoroethylene, or PTFE) using mechanical grinding and sodium metal. The process, published in late 2025, breaks the notoriously strong carbon-fluorine bonds in PTFE at room temperature — without toxic solvents or high heat — and converts the fluorine into sodium fluoride, a compound that can be reused directly in chemical manufacturing.

The breakthrough addresses a long-standing problem: Teflon and other fluoropolymers are among the most chemically resistant materials ever created, which makes them incredibly useful but nearly impossible to recycle through conventional methods. Until now, the standard disposal route has been high-temperature incineration, which can release persistent pollutants including PFAS compounds — the so-called “forever chemicals.”

How the Process Works

The method relies on mechanochemistry — using mechanical force to drive chemical reactions. Here is how it works:

1. Ball milling — Small pieces of Teflon waste are placed in a sealed steel container (a ball mill) along with pieces of sodium metal
2. Grinding — Steel balls inside the container grind the Teflon and sodium together, generating enough localized energy to break the C-F bonds
3. Bond breaking — The sodium reacts with the freed fluorine atoms, forming sodium fluoride (NaF) — a stable, non-toxic salt
4. Collection — The sodium fluoride is separated and can be used directly in downstream applications

Dr. Roly Armstrong, one of the lead researchers, explained: “The process we have discovered breaks the strong carbon-fluorine bonds in Teflon, converting it into sodium fluoride” — a compound with established commercial value.

Why It Matters for the Chemical Industry

This development has significant implications across several areas:

PFAS and Environmental Compliance

PFAS contamination is one of the most pressing environmental challenges facing the chemical industry. The EPA has been tightening PFAS regulations, and any technology that reduces PFAS release during fluoropolymer disposal is commercially significant. Traditional Teflon incineration can release persistent fluorinated compounds — this new process eliminates that pathway entirely.

Circular Economy for Fluorine

Fluorine is an essential element in pharmaceuticals, agrochemicals, refrigerants, and specialty coatings. The global fluorine supply chain depends heavily on fluorite mining. A viable recycling pathway that recovers fluorine as sodium fluoride creates a circular economy — reducing dependence on raw mineral extraction while providing a feedstock for fluorine chemistry.

Sodium Fluoride Applications

The sodium fluoride produced by this process has direct commercial applications:

• Water fluoridation — Used in municipal water treatment systems
• Dental products — Active ingredient in fluoride toothpastes
• Chemical synthesis — Feedstock for producing fluorine-containing pharmaceutical intermediates and specialty chemicals
• Industrial applications — Used in metal surface treatment, glass etching, and as a flux in metallurgy

What Comes Next

The researchers are working to scale the process beyond laboratory quantities. Key questions for commercialization include:

• Throughput — Can ball-milling handle industrial volumes of Teflon waste?
• Sodium sourcing — Sodium metal is reactive and requires careful handling; scaled-up processes will need reliable supply chains
• Purity — Can the recovered sodium fluoride meet pharmaceutical or water-treatment grade specifications?
• Economics — Does the value of recovered NaF justify the processing cost compared to landfill or incineration?

For chemical suppliers and environmental service companies, this technology is worth watching. If commercialized, it could reshape how the industry handles end-of-life fluoropolymers and create a new source of fluorine feedstock.