Closed-Loop and Selective Recyclable Fluoro-Containing Graft Copolymers with Diverse Applications

Area of Science:

• Polymer Chemistry
• Materials Science
• Environmental Science

Background:

• Fluoropolymers, including per- and polyfluoroalkyl substances (PFAS), offer unique properties but pose environmental challenges.
• Developing sustainable methods for managing PFAS-based polymeric waste is crucial.

Purpose of the Study:

• To create a fluoro-containing graft copolymer with selective side-chain recyclability.
• To explore the potential of this material as a polymer electrolyte and for other applications after recycling.

Main Methods:

• Modification of a poly(vinylidene fluoride-co-chlorotrifluoroethylene) (PVDF-CTFE) backbone with 4-vinylbenzyl alcohol (VBOH) units.
• Grafting of poly(trimethylene carbonate) (PTMC) side chains onto the modified backbone.
• Selective deconstruction of PTMC side chains for backbone recovery and reuse.

Main Results:

• The graft copolymer exhibits improved ionic conductivity and mechanical robustness, suitable for polymer electrolytes in batteries.
• The recycled backbone shows a high dielectric constant and resistance to harsh environments, ideal for capacitors and anti-corrosion coatings.
• Reconstructed graft copolymer demonstrates comparable electrochemical performance.

Conclusions:

• This strategy offers a method for managing PFAS-based polymeric waste.
• The developed graft copolymer system diversifies the application potential of copolymers through selective recyclability.