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Herlem G, Roina Y, Fregnaux M, Gonçalves AM, Cattey H, Picaud F, Auber F. Direct Defluorination and Amination of Polytetrafluoroethylene and Other Fluoropolymers by Lithium Alkylamides. Molecules 2024; 29:3045. [PMID: 38998995 PMCID: PMC11243494 DOI: 10.3390/molecules29133045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 05/29/2024] [Accepted: 06/20/2024] [Indexed: 07/14/2024] Open
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.
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Affiliation(s)
- Guillaume Herlem
- Laboratoire SINERGIES, CHU Jean Minjoz, UFR Sciences & Techniques, 16 Route de Gray, 25030 Besançon CEDEX, France
| | - Yaelle Roina
- Laboratoire SINERGIES, CHU Jean Minjoz, UFR Sciences & Techniques, 16 Route de Gray, 25030 Besançon CEDEX, France
| | - Mathieu Fregnaux
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, UMR 8180, 78035 Versailles CEDEX, France
| | - Anne-Marie Gonçalves
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, UMR 8180, 78035 Versailles CEDEX, France
| | - Hélène Cattey
- Institut ICMUB—CNRS 6302, Université de Bourgogne, UFR Sciences et Techniques Mirande, 9 Avenue Alain Savary, 21000 Dijon CEDEX, France
| | - Fabien Picaud
- Laboratoire SINERGIES, CHU Jean Minjoz, UFR Sciences & Techniques, 16 Route de Gray, 25030 Besançon CEDEX, France
| | - Frédéric Auber
- Laboratoire SINERGIES, CHU Jean Minjoz, UFR Sciences & Techniques, 16 Route de Gray, 25030 Besançon CEDEX, France
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Patterning Perfluorinated Surface with Graphene Oxide and the Microarray Applications. MICROMACHINES 2019; 10:mi10030173. [PMID: 30832281 PMCID: PMC6470711 DOI: 10.3390/mi10030173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Revised: 02/24/2019] [Accepted: 02/27/2019] [Indexed: 12/22/2022]
Abstract
A method was developed to pattern the surface of perfluorinated materials with graphene oxide thin film, and various biological applications of the patterned perfluorinated surface were illustrated. Perfluorinated surfaces such as Teflon, Cytop, and other perfluorinated materials are known to be both hydrophobic and oleophobic, with low adhesion for most materials. Modifying the perfluorinated surfaces has been difficult due to the extraordinary chemical inertness, which limits the applications of perfluorinated materials as anti-fouling substrates. Herein we successfully patterned Cytop surfaces with graphene oxide. Patterns of the graphene oxide thin film with feature dimension down to 40 microns were formed and remained stable on the Cytop surface against washing with water, ethanol and acetone. The graphene oxide thin film on the Cytop surface allowed non-specific protein adsorption. To illustrate the applications of the patterned Cytop surface, we used the patterned Cytop surface as the substrate to study the protein-protein interactions, stem cell culture, and stem cell proliferation.
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Shen B, Xiong B, Wu H. Convenient surface functionalization of whole-Teflon chips with polydopamine coating. BIOMICROFLUIDICS 2015; 9:044111. [PMID: 26339312 PMCID: PMC4522012 DOI: 10.1063/1.4927675] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 07/21/2015] [Indexed: 06/05/2023]
Abstract
This paper presents a convenient strategy to modify the surface of whole-Teflon microfluidic chips by coating the channel walls with a thin layer of polydopamine (PDA) film, which is formed by oxidation-induced self-polymerization of dopamine in alkaline solution. Two coating strategies, static incubation and dynamic flow, are demonstrated and used for tuning the physical and chemical properties of the coated channel walls. The functionalized surfaces were investigated with the contact angle, X-ray photoelectron spectroscopy, and atomic force microscopy measurements. The coating time was optimized according to the fluorescent intensity of the green fluorescent protein immobilized on the modified surface. Applications of the PDA-modified Teflon microchips in bioanalysis were demonstrated with a typical sandwich immunoassay. Moreover, long-term cell culture experiments on modified and native Teflon chips revealed that the chip biocompatibility can be greatly improved with PDA coating. The results indicate that the surface properties of the Teflon can be easily controlled by the PDA modification, thus greatly expanding the application scope of whole-Teflon chips for various chemical and biological research fields.
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Affiliation(s)
- Bo Shen
- Department of Chemistry, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, China
| | - Bin Xiong
- Department of Chemistry, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, China
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Effect of chemical treatment of Teflon powder on the properties of polyamide 66/Teflon composites prepared by melt mixing. Macromol Res 2011. [DOI: 10.1007/s13233-011-0612-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Grafting of styrene/maleic anhydride copolymer onto PVDF membrane by supercritical carbon dioxide: Preparation, characterization and biocompatibility. J Supercrit Fluids 2008. [DOI: 10.1016/j.supflu.2008.02.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Klüpfel B, Lehmann D. Functionalization of irradiated PTFE micropowder with methacryl- or hydroxy groups for chemical coupling of PTFE with different matrix polymers. J Appl Polym Sci 2006. [DOI: 10.1002/app.22885] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Combellas C, Ghilane J, Kanoufi F, Mazouzi D. Surface Modification of Halogenated Polymers. 7. Local Reduction of Poly(tetrafluoroethylene) and Poly(chlorotrifluoroethylene) by a Scanning Electrochemical Microscope in the Feedback Mode. J Phys Chem B 2004; 108:6391-7. [DOI: 10.1021/jp0376929] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Catherine Combellas
- Laboratoire Environnement et Chimie Analytique, UMR 7121, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Jalal Ghilane
- Laboratoire Environnement et Chimie Analytique, UMR 7121, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Frédéric Kanoufi
- Laboratoire Environnement et Chimie Analytique, UMR 7121, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Driss Mazouzi
- Laboratoire Environnement et Chimie Analytique, UMR 7121, 10 rue Vauquelin, 75231 Paris Cedex 05, France
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Affiliation(s)
- Catherine Combellas
- Laboratoire Environnement et Chimie Analytique, CNRS-UMR 7121, ESPCI, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Frédéric Kanoufi
- Laboratoire Environnement et Chimie Analytique, CNRS-UMR 7121, ESPCI, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - André Thiébault
- Laboratoire Environnement et Chimie Analytique, CNRS-UMR 7121, ESPCI, 10 rue Vauquelin, 75231 Paris Cedex 05, France
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Combellas C, Kanoufi F, Mazouzi D, Thiébault A, Bertrand P, Médard N. Surface modification of halogenated polymers. 4. Functionalisation of poly(tetrafluoroethylene) surfaces by diazonium salts. POLYMER 2003. [DOI: 10.1016/s0032-3861(02)00736-x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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