Teflon microplastics and nanoplastics released from non-stick cookware
Written by Yunlong Luo, Christopher T. Gibson, Clarence Chuah, Youhong Tang, Ravi Naidu, Cheng Fang


The characterisation of microplastics is still difficult, and the challenge is even greater for nanoplastics. A possible source of these particles is the scratched surface of a non-stick cooking pot that is mainly coated with Teflon. Herein we employ Raman imaging to scan the surfaces of different non-stick pots and collect spectra as spectrum matrices, akin to a hyperspectral imaging process. We adjust and optimise different algorithms and create a new hybrid algorithm to extract the extremely weak signal of Teflon microplastics and particularly nanoplastics...

...Based on these developments and with the help of SEM, we estimate that thousands to millions of Teflon microplastics and nanoplastics might be released during a mimic cooking process.


* Raman imaging identifies Teflon particles released from scratched non-stick pots.

* A new algorithm combining PCA and algebra-based algorithm is developed.

* The PCA/algebra-based algorithm enables better detection of nanoplastics.

* Broken coating may lead to release of 2,300,000 microplastics and nanoplastics.

* A surface crack could leave behind approximately 9100 plastic particles.


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