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Your search keyword '"Fouchet, Arnaud"' showing total 3 results
Start Over Author "Fouchet, Arnaud" Topic zirconia
3 results on '"Fouchet, Arnaud"'

1. Antibacterial Zirconia Surfaces from Organocatalyzed Atom-Transfer Radical Polymerization.

Author

Harfouche, Nesrine, Marie, Philippe, Dragoe, Diana, Le, Hung, Thébault, Pascal, Bilot, Christelle, Fouchet, Arnaud, Rouden, Jacques, Baudoux, Jérôme, and Lepoittevin, Bénédicte

Subjects
ZIRCONIUM oxide, RADICALS (Chemistry), X-ray photoelectron spectroscopy, ATOMIC force microscopes, CATIONIC polymers, CONTACT angle
Abstract

Antibacterial coatings are becoming increasingly attractive for application in the field of biomaterials. In this framework, we developed polymer coating zirconia with antibacterial activity using the "grafting from" methodology. First, 1-(4-vinylbenzyl)-3-butylimidazolium chloride monomer was synthesized. Then, the surface modification of zirconia substrates was performed with this monomer via surface-initiated photo atom transfer radical polymerization for antibacterial activity. X-ray photoelectron spectroscopy, ellipsometry, static contact angle measurements, and an atomic force microscope were used to characterize the films for each step of the surface modification. The results revealed that cationic polymers could be successfully deposited on the zirconia surfaces, and the thickness of the grafted layer steadily increased with polymerization time. Finally, the antibacterial adhesion test was used to evaluate the antibacterial activity of the modified zirconia substrates, and we successfully showed the antibacterial activity against Staphylococcus aureus and Pseudomonas aeruginosa strains. [ABSTRACT FROM AUTHOR]

Published
2024
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2. Amido bisphosphonic acid as anchoring agent and photopolymerization initiator onto zirconium oxide surface

Author

Ben-Hadj-Salem, Jihen, Dragoe, Diana, Marie, Philippe, Froissart, Sandrine, Fouchet, Arnaud, Rouden, Jacques, Lecourt, Jérôme, Harnois, Christelle, Touil, Soufiane, Baudoux, Jérôme, Lepoittevin, Bénédicte, Laboratoire de chimie moléculaire et thioorganique (LCMT), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut Normand de Chimie Moléculaire Médicinale et Macromoléculaire (INC3M), Normandie Université (NU)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Le Havre Normandie (ULH), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), Institut de Chimie du CNRS (INC)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de cristallographie et sciences des matériaux (CRISMAT), Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), and Laboratoire des composés Hétéro-Organiques et Matériaux Nanostructurés (LR18ES11)

Subjects
[CHIM.ORGA]Chemical Sciences/Organic chemistry, hybrid materials, bisphosphonic acid, photopolymerization, [CHIM]Chemical Sciences, zirconia, grafting from
Abstract

International audience; The surface modification of metal oxides by grafting an organic molecule allows the development of new specific properties on demand. In this work, we demonstrate the modification of the Yttria Tetragonal Zirconia Polycrystal (Y-TZP), which is a ceramic widely used in dental implantology, by polymer grafting of the surface in a three-steps protocol for tuning the wetting properties. The first step involved the preparation of zirconia pellet by sintering followed by their surface activation. In the second step, the organic initiator bearing a tertiary amine such as the N,N-dimethylamino group capable of initiating a radical photopolymerization reaction, was grafted onto the surface through a bisphosphonic acid functionality. In the last step, two monomers, namely methyl methacrylate and styrene, were photopolymerized on the zirconia surface by blue light irradiation.The chemical steps were monitored and characterized by X-ray photoelectron spectroscopy (XPS), spectroscopic ellipsometry (SE) and Atomic Force Microscopy (AFM). Wetting properties to different polar and nonpolar liquids and surface energies calculated with the Van Oss theory were found to vary systematically depending on the type of functionalization and grafting. This methodology is very promising for surface tuning of the dental ceramic.

Published
2023

3. Zirconia surface polymer grafting via dopamine-assisted co-deposition and radical photopolymerization.

Author

Dezanet, Clément, Dragoe, Diana, Marie, Philippe, Harfouche, Nesrine, Froissart, Sandrine, Fouchet, Arnaud, Rouden, Jacques, Lecourt, Jérôme, Harnois, Christelle, Thébault, Pascal, Baudoux, Jérôme, and Lepoittevin, Bénédicte

Subjects
*PHOTOPOLYMERIZATION, *METHYL methacrylate, *ZIRCONIUM oxide, *X-ray photoelectron spectroscopy, *GRAFT copolymers, *SURFACE analysis, *CONTACT angle
Abstract

Zirconia surfaces were functionalized by polymer grafting according to a simple and successful two-steps procedure. In the first step, the initiator bearing a N , N -dimethyl amine group was grafted on the surface by co-deposition with dopamine. Secondly, different monomers such as styrene, methyl methacrylate, 2-hydroxyethylmethacrylate, 2,2,2-trifluoroethyl methacrylate and styrene sulfonate were polymerized on the surface using photochemical activation. The efficiency of the two steps, initiator grafting and photopolymerization, were checked by several analytical techniques including X-ray photoelectron spectroscopy (XPS), spectroscopic ellipsometry (SE) and water contact angle measurements. Theses characterizations highlighted the surface chemical change after each step and the possibility to modulate surface hydrophilicity and hydrophobicity by grafting-from polymerizations. [Display omitted] • A novel initiator for radical photopolymerization bearing a catechol group was prepared by a simple two-step procedure. • Zirconia surfaces were functionalized by grafting of a polymer layer using photopolymerization with blue led activation. • The hydrophilicity and hydrophobicity of zirconia surfaces could be modulated according to the nature of the monomer used. [ABSTRACT FROM AUTHOR]

Published
2022
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