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Direct Defluorination and Amination of Polytetrafluoroethylene and Other Fluoropolymers by Lithium Alkylamides

Authors :
Guillaume Herlem
Yaelle Roina
Mathieu Fregnaux
Anne-Marie Gonçalves
Hélène Cattey
Fabien Picaud
Frédéric Auber
Source :
Molecules, Vol 29, Iss 13, p 3045 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

Polytetrafluoroethylene (PTFE) and, by extension, fluoropolymers are ubiquitous in science, life, and the environment as perfluoroalkyl pollutants (PFAS). In all cases, it is difficult to transform these materials due to their chemical inertness. Herein, we report a direct amination process of PTFE and some fluoropolymers such as polyvinylidene fluoride (PVDF) and Nafion by lithium alkylamide salts. Synthesizing these reactants extemporaneously between lithium metal and an aliphatic primary di- or triamine that also serves as a solvent leads to the rapid nucleophilic substitution of fluoride by an alkylamide moiety when in contact with the fluoropolymer. Moreover, lithium alkylamides dissolved in suitable solvents other than amines can react with fluoropolymers. This highly efficient one-pot process opens the way for further surface or bulk modification if needed, providing an easy, inexpensive, and fast experiment protocol on large scales.

Details

Language :
English
ISSN :
14203049
Volume :
29
Issue :
13
Database :
Directory of Open Access Journals
Journal :
Molecules
Publication Type :
Academic Journal
Accession number :
edsdoj.7ac45a387cb04cdbbbf0e3b7a8e6c210
Document Type :
article
Full Text :
https://doi.org/10.3390/molecules29133045