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TestingCompoundsEmerging ContaminantsPFASPlastics

Teflon coating study raises hot questions about microplastics in cooking

Non-stick cookware loses coating and releases PFAS microplastics.

PFAS teflon
November 11, 2022

Ever noticed how your non-stick cookware wears thin over time?

Scientists from Newcastle University and Flinders University have now been able to measure how millions of tiny plastic particles potentially come off during cooking and in the wash as non-stick pots and pans gradually lose their coating.

Just one surface crack on a Teflon-coated pan can release about 9,100 plastic particles, report researchers from the Global Center for Environmental Remediation and Flinders Institute of NanoScale Science and Engineering.

And at a micro scale, their Raman imaging and an algorithm model have identified the release of 2.3 million microplastics and nanoplastics from broken coating.

"The non-stick coating material Teflon is generally a family member of PFAS," says University of Newcastle researcher Dr. Cheng Fang.

"Given the fact PFAS is a big concern, these Teflon microparticles in our food might be a health concern, [which] needs investigating because we don't know much about these emerging contaminants."

The study developed a molecular spectrum approach to directly visualize and identify the Teflon microplastics and nanoplastics, which are more difficult to monitor than other plastics.

Flinders University researcher Professor Youhong Tang says the study highlights the need to gain insights into the threat of Teflon plastic debris during daily cooking.

"It gives us a strong warning that we must be careful about selecting and using cooking utensils to avoid food contamination," says Professor Tang, from the College of Science and Engineering at Flinders University.

"More research is recommended to address the risk assessment of the Teflon microplastics and nanoplastics, given that Teflon is a family member of PFAS."

The study is published in Science of The Total Environment.

More information: Yunlong Luo et al, Raman imaging for the identification of Teflon microplastics and nanoplastics released from non-stick cookware, Science of The Total Environment (2022). DOI: 10.1016/j.scitotenv.2022.158293

Source: Flinders University
KEYWORDS: forever chemicals

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