Related Experiment Video
Updated: Aug 6, 2026
08:12
Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
Published on: December 16, 2022
Recycling fluoropolymers to acyl fluorides through shuttle catalysis
Shannon E S Farley1, Amanda A Fogh1, Mark R Crimmin1
1Department of Chemistry, Molecular Sciences Research Hub, Imperial College London 82 Wood Lane, White City London W12 0BZ UK m.crimmin@imperial.ac.uk.
Chemical Science
|July 23, 2026
Summary
This study presents a new catalytic method for chemical recycling of fluoropolymers like poly(vinylidene difluoride). The process harvests fluorine as acyl fluorides, offering a scalable route for valuable material recovery and new fluorinated material synthesis.
Area of Science:
- Polymer Chemistry
- Materials Science
- Sustainable Chemistry
Background:
- Fluoropolymers, such as poly(vinylidene difluoride) (PVDF), are widely used but challenging to recycle.
- Effective recycling methods are needed to recover valuable fluorine content and reduce environmental impact.
Purpose of the Study:
- To develop a catalytic chemical recycling process for fluoropolymers.
- To investigate the conversion of fluoropolymers into acyl fluorides.
- To explore the potential for creating new fluorinated materials.
Main Methods:
- Utilized a catalytic system of BF3·OEt2 and BF3·PCy3 for defluorination.
- Optimized reaction conditions using fluoroethane (HFC-161) as a model substrate.
- Applied the methodology to various pristine and post-consumer fluoropolymers, including PVDF from Li-ion batteries.
- Conducted spectroscopic and thermal analyses (XRD, XPS, IR, DSC, TGA) to characterize the products.
Main Results:
- Successfully harvested fluorine from fluoropolymers as acyl fluorides using the BF3-based catalyst.
- Demonstrated scalability with various acid anhydrides, including acetic anhydride.
- Characterization revealed decreased crystallinity and loss of the α-phase in recycled PVDF.
- Introduced new unsaturated C=C and oxygen-containing functional groups, altering material properties and lowering decomposition temperature.
Conclusions:
- The developed catalytic method provides an effective route for chemical recycling of fluoropolymers.
- This approach enables the recovery of fluorine and the synthesis of novel fluorinated materials.
- The process holds potential for sustainable management of fluoropolymer waste.
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