Scientists have discovered a new way to recycle Teflon into fluoride compounds used in toothpaste. This Teflon recycling method transforms one of the world’s most stubborn “forever chemicals” into something refreshingly useful.
Have you ever considered brushing your teeth with Teflon? It doesn’t sound particularly appealing, but scientists from Newcastle University and the University of Birmingham have just made it possible. Their new research turns Teflon waste into sodium fluoride, the same compound found in toothpaste and used in water fluoridation programs worldwide.
Published in the Journal of the American Chemical Society on October 22, 2025, the study describes how mechanical shaking with sodium metal at room temperature can break down polytetrafluoroethylene (PTFE), better known as Teflon.
If you’re picturing nonstick frying pans, that’s the stuff. Teflon’s smooth, glossy surface keeps food from sticking, but it also makes the material nearly impossible to destroy once discarded. This new discovery could change that story entirely.
Unlike traditional disposal methods that require incineration or extreme heat, Teflon recycling works efficiently at room temperature, producing clean sodium fluoride without the need for further purification. In short, scientists have discovered a low-cost, sustainable method to convert one of the planet’s most challenging waste products into a valuable, widely used material.
Teflon, first developed by DuPont in 1938, has become a fixture in modern life, used in cookware, medical devices, and industrial coatings. But its durability has a dark side: it doesn’t degrade naturally and contributes to PFAS pollution, the notorious “forever chemicals.” With hundreds of thousands of tonnes of Teflon produced every year, much of it ends up in landfills, where it can persist indefinitely and release toxic compounds.
The breakthrough, led by Dr. Roly Armstrong, centers on recovering fluorine, the element that makes Teflon so resistant, and reusing it safely. By extracting fluorine from PTFE and converting it into sodium fluoride, the researchers effectively close the loop on one of chemistry’s most stubborn environmental challenges.
See also: Japanese Scientists Recycle PTFEs with Electron Beam Plastic Recycling
Here’s how it works. In a sealed ball mill, a steel container that grinds and shakes materials, scientists combined sodium metal with shredded Teflon. As the machine vibrates, the sodium atoms break apart Teflon’s famously strong carbon-fluorine bonds, forming two stable products: solid carbon and sodium fluoride. This process, known as mechanochemistry, relies purely on mechanical motion rather than heat or solvents.
The simplicity of the process makes it highly scalable. The Teflon recycling method does not require specialized conditions, complex reagents, or expensive purification. Teflon waste can be transformed into a clean, commercially valuable material using only basic lab equipment.
The sodium fluoride recovered can go straight into toothpaste, water treatment systems, or even pharmaceuticals. The leftover carbon also has commercial value—it can be converted into activated carbon, used to filter air and water. The dual benefit means the entire process yields no waste at all.
Solid-state Nuclear Magnetic Resonance (NMR) spectroscopy was used to confirm the structure of the end products, showing that the conversion is complete with no harmful byproducts. The sodium fluoride produced is as pure as material made through standard industrial synthesis. Experts not involved in the research have praised the work as a major step toward sustainable fluorine chemistry, calling it a striking demonstration of efficient upcycling, though more research is needed to test the sodium fluoride’s suitability across industrial uses.
The Teflon recycling method could also be expanded beyond Teflon to other PFAS materials, creating what researchers call a “fluorine circular economy,” a system where waste fluorinated compounds are harvested, recycled, and reused. According to Dr. Lu, the goal isn’t just to clean up Teflon but to inspire similar methods for other persistent pollutants.
Traditional Teflon recycling attempts have relied on extreme heat or corrosive chemicals, often producing toxic emissions. Mechanochemistry bypasses all that, relying on physical motion alone. It’s safer, more efficient, and easily scalable, making it a realistic candidate for industrial adoption.
There are safety considerations, of course. Sodium metal reacts strongly with air and water, but the researchers say these can be safely managed in sealed containers. Even in open air, sodium’s natural oxide coating provides some protection.
Beyond toothpaste, the recovered fluorine can be used to synthesize sulfonyl and acid fluorides, essential ingredients in pharmaceuticals and advanced materials. That means the potential reach of this discovery extends far beyond personal care products, possibly reshaping the future of industrial fluorine use.
As PFAS contamination continues to alarm scientists and regulators alike, this discovery represents a critical shift away from “burn or bury” approaches. Incineration creates toxic gases, and landfilling allows PFAS to seep into groundwater. In contrast, mechanochemical recycling turns pollutants into clean, valuable materials.
Scaling the technology will require improved collection and sorting systems for Teflon waste, which is currently mixed with general plastics. But with the high commercial value of sodium fluoride and growing pressure to solve the PFAS crisis, researchers believe this approach could soon move beyond the lab.
The goal of the research is to make every bit of Teflon useful again. Materials once considered indestructible can now be integrated into a circular economy rather than becoming a waste problem.
