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363 results on '"Charleux, Bernadette"'

1. Incorporation of magnetic nanoparticles into lamellar polystyrene-b-poly(n-butyl methacrylate) diblock copolymer films: influence of the chain end-groups on nanostructuration

Author

Douadi-Masrouki, Siham, Frka-Petesic, Bruno, Save, Maud, Charleux, Bernadette, Cabuil, Valérie, and Sandre, Olivier

Subjects
Condensed Matter - Materials Science
Abstract

In this article, we present new samples of lamellar magnetic nanocomposites based on the self-assembly of a polystyrene-b-poly(n-butyl methacrylate) diblock copolymer synthesized by atom transfer radical polymerization. The polymer films were loaded with magnetic iron oxide nanoparticles covered with polystyrene chains grown by surface initiated-ATRP. The nanostructuration of the pure and magnetically loaded copolymer films on silicon was studied by atomic force microscopy, ellipsometry, neutron reflectivity and contact angle measurement. The present study highlights the strong influence of the copolymer extremity - driven itself by the choice of the ATRP chemical route - on the order of the repetition sequences of the blocks in the multi-lamellar films. In addition, a narrower distribution of the nanoparticles' sizes was examined as a control parameter of the SI-ATRP reaction.

Published
2018
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10. Synthesis of Branched Polymers by Cationic Polymerization

Author

Charleux, Bernadette, Faust, Rudolf, Abe, Akihiro, editor, Albertson, Ann-Christine, editor, Cantow, Hans-Joachim, editor, Dušek, Karel, editor, Edwards, Sam, editor, Höcker, Hartwig, editor, Joanny, Jean-Francois, editor, Kausch, Hans-Henning, editor, Kobayashi, Takashi, editor, Lee, Kwang-Sup, editor, McGrath, James E., editor, Monnerie, Lucien, editor, Stupp, Samuel I., editor, Suter, Ulrich W., editor, Thomas, Edwin L., editor, Wegner, Gerhard, editor, Young, Robert J., editor, and Roovers, Jacques, editor

Published
1999
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13. One-Pot RAFT Synthesis of Triphenylphosphine-Functionalized Amphiphilic Core-Shell Polymers and Application as Catalytic Nanoreactors in Aqueous Biphasic Hydroformylation

Author

Poli, Rinaldo, primary, Chen, Si, additional, Zhang, Xuewei, additional, Cardozo, Andrés, additional, Lansalot, Muriel, additional, D’Agosto, Franck, additional, Charleux, Bernadette, additional, Manoury, Eric, additional, Gayet, Florence, additional, Julcour, Carine, additional, Blanco, Jean-François, additional, Barthe, Laurie, additional, and Delmas, Henri, additional

Published
2015
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29. Tetrathiafulvalene End-Functionalized Poly(N-isopropylacrylamide): A New Class of Amphiphilic Polymer for the Creation of Multistimuli Responsive Micelles

Author

Bigot, Julien, Charleux, Bernadette, Cooke, Graeme, Delattre, François, Fournier, David, Lyskawa, Joël, Sambe, Léna, Stoffelbach, François, and Woisel, Patrice

Abstract

In this article, we report the formation of micelles from a tetrathiafulvalene (TTF) end-functionalized poly(N-isopropylacrylamide) (poly(NIPAM)) derivative (1). We have determined the critical aggregation concentration (CAC) and average diameter of the micelles using fluorescence spectroscopy and dynamic light scattering experiments, respectively. We have exploited the NIPAM backbone of the polymer to thermally transform the swollen hydrophilic poly(NIPAM) derivative to a more globular hydrophobic state at the lower critical solution temperature (LCST). Finally, we have shown that we can exploit the chemical oxidation and complexation properties of the TTF unit to disrupt the micelle architecture to release the hydrophobic dye Nile Red from the interior of the micelle.

Published
2024
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30. Facile Synthesis of Innocuous Comb-Shaped Polymethacrylates with PEG Side Chains by Nitroxide-Mediated Radical Polymerization in Hydroalcoholic Solutions

Author

Chenal, Marion, Mura, Simona, Marchal, Cathie, Gigmes, Didier, Charleux, Bernadette, Fattal, Elias, Couvreur, Patrick, and Nicolas, Julien

Abstract

The nitroxide-mediated copolymerization of poly(ethylene glycol) methyl ether methacrylate (MePEGMA) with a small amount of acrylonitrile using an SG1-based alkoxyamine initiator was shown to be a very simple and efficient technique to synthesize graft copolymers with poly(ethylene glycol) side chains. The copolymerizations were carried out in ethanol/water solutions as environmentally friendly media. Following our observation that the rate increased with the proportion of water, a polymerization temperature as low as 71 °C could be used for a water content of 75%, which conferred great flexibility to the process. The so-formed copolymers were living, with high crossover efficiency toward block copolymers. Importantly, following a cytotoxicity study over three different cell lines that represent important mammalian cell types, these polymers were shown to be noncytotoxic even at very high doses without any other purification step than a simple precipitation. These comb-shaped PEG-based polymers may represent an ideal platform for the synthesis of PEGylating moieties for proteins and nanoparticles intended to be used in the biomedical field.

Published
2024
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31. Tetrathiafulvalene end-functionalized poly(N-isopropylacrylamide): a new class of amphiphilic polymer for the creation of multistimuli responsive micelles

Author

Bigot, Julien, Charleux, Bernadette, Cooke, Graeme, Delattre, Francois, Fournier, David, Lyskawa, Joel, Sambe, Lena, Stoffelbach, Francois, and Woisel, Patrice

Subjects
Hydrophobic effect -- Analysis, Organosulfur compounds -- Structure, Organosulfur compounds -- Chemical properties, Oxidation-reduction reaction -- Analysis, Polyacrylamide -- Structure, Polyacrylamide -- Chemical properties, Chemistry
Abstract

The formation of micelles from a tetrathiafulvalene (TTF) end-functionalized poly(N-isopropylacrylamide) (poly(NIPAM)) derivative is described. The studies have shown that the chemical oxidation and complexation properties of the TTF unit are used for disrupting the micelle architecture to release the hydrophobic dye Nile Red from the interior of the micelle.

Published
2010

32. Di-and Triblock Copolymers Based on Polyethylene and Polyisobutene Blocks. Toward New Thermoplastic Elastomers

Author

Espinosa, Edgar, Charleux, Bernadette, D’Agosto, Franck, Boisson, Christophe, Tripathy, Ranjan, Faust, Rudolf, Soulié-Ziakovic, Corinne, Laboratoire de Chimie, Catalyse, Polymères et Procédés, R 5265 (C2P2), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), University of Massachusetts [Lowell] (UMass Lowell), University of Massachusetts System (UMASS), Laboratoire Matière Molle et Chimie (MMC), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), and Montarnal, Damien

Subjects
[CHIM] Chemical Sciences, [CHIM]Chemical Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2013

33. Cosmetic composition comprising a dispersion of soft polymer particles

Author

Farcet, Celine, Houillot, Lisa, Save, Maud, Charleux, Bernadette., L'Oréal, Aulnay-sous-Bois, L'OREAL, Chimie des polymères (LCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut Parisien de Chimie Moléculaire (IPCM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut pluridisciplinaire de recherche sur l'environnement et les matériaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and Institut Pluridisciplinaire de Recherche sur l'Environnement et les Matériaux (IPREM)

Subjects
cosmetic dispersion polymer particle prepn, [CHIM]Chemical Sciences
Abstract

The present invention relates to a dispersion of polymer particles, in a liq. medium, the particles having a soft polymeric core and being surface-stabilized by a stabilizing block copolymer comprising at least one block that is sol. in the liq. medium and at least one block that is insol. in the medium. The invention also relates to a cosmetic compn. comprising the dispersion, and also to a treatment method using the compn. A dispersion was prepd. from poly(Me acrylate) in isododecane stabilized by 2-ethylhexyl acrylate-Me acrylate triblock copolymer. A lipstick was prepd. from the above dispersion 13, polyethylene wax 3, and isododecane qs to 100%.

Published
2010

34. SEC Analysis of Poly(Acrylic Acid) and Poly(Methacrylic Acid)

Author

Lacík, Igor, primary, Stach, Marek, additional, Kasák, Peter, additional, Semak, Vladislav, additional, Uhelská, Lucia, additional, Chovancová, Anna, additional, Reinhold, Günter, additional, Kilz, Peter, additional, Delaittre, Guillaume, additional, Charleux, Bernadette, additional, Chaduc, Isabelle, additional, D'Agosto, Franck, additional, Lansalot, Muriel, additional, Gaborieau, Marianne, additional, Castignolles, Patrice, additional, Gilbert, Robert G., additional, Szablan, Zachary, additional, Barner-Kowollik, Christopher, additional, Hesse, Pascal, additional, and Buback, Michael, additional

Published
2014
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35. Core-Shell Nanoreactors for Efficient Aqueous Biphasic Catalysis

Author

Zhang, Xuewei, primary, Cardozo, Andrés F., additional, Chen, Si, additional, Zhang, Wenjing, additional, Julcour, Carine, additional, Lansalot, Muriel, additional, Blanco, Jean-François, additional, Gayet, Florence, additional, Delmas, Henri, additional, Charleux, Bernadette, additional, Manoury, Eric, additional, D'Agosto, Franck, additional, and Poli, Rinaldo, additional

Published
2014
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36. Surfactant free ab initio emulsion polymerization of vinyl acetate using a dextran-based xanthate agent synthesized by click chemistry

Author

Bernard, Julien, Save, Maud, Arathoon, Benoit, Charleux, Bernadette, Ingénierie des Matériaux Polymères - Laboratoire des Matériaux Macromoléculaires (IMP-LMM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet [Saint-Étienne] (UJM)-Centre National de la Recherche Scientifique (CNRS), Chimie des polymères (LCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut Parisien de Chimie Moléculaire (IPCM), Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.POLY]Chemical Sciences/Polymers
Published
2008

37. Utilisation d'un polysaccharide terminé xanthate en tant que stabilisant de la polymérisation en émulsion batch ab initio de l'acétate de vinyle

Author

Save, Maud, Bernard, Julien, Arathoon, Benoit, Charleux, Bernadette, Chimie des polymères (LCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut Parisien de Chimie Moléculaire (IPCM), Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Ingénierie des Matériaux Polymères - Laboratoire des Matériaux Macromoléculaires (IMP-LMM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet [Saint-Étienne] (UJM)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.POLY]Chemical Sciences/Polymers
Published
2008

38. Process for preparation of microgel particles by controlled radical polymerization in aqueous dispersion using nitroxide control agents

Author

Magnet, Stephanie, Charleux, Bernadette, Delaittre, Guillaume, Save, Maud, Groupement de recherches de Lacq (GRL), Arkema (Arkema), Chimie des polymères (LCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut Parisien de Chimie Moléculaire (IPCM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Pau et des Pays de l'Adour (UPPA), and Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
vinyl polymer microgel dispersion manuf phosphonate nitroxide mediator, [CHIM]Chemical Sciences
Abstract

The invention relates to a method for prepg. microgel particles according to a method of controlled radical polymn. in an aq. dispersion using particular control agents of the nitroxide type. Use in the biomedical field, and in the field of agrochem., cosmetics, surface coatings. Dispersions of microgel particulates with particle size ≤100 nm are manufd. in the absence of surfactants by (a) polymn. of ≥1 monomer in the presence of R2OCOCR1R3ON(CMe3)CH(CMe3)P(:O)(OEt)2or Z[CH(CH2CR1R3CO2R2)ON(CMe3)CH(CMe3)P(:O)(OEt)2]n [R1, R3 = C1-3 alkyl, R2 = H, C1-8 alkyl, Ph, alkali metal, or NH4, Z = arom. group or Z1[XC(O)]n, Z1 = polyfunctional group, X = O, N having a carbon-contg. group or H, or S, n ≥ 2] in an aq. media, (b) polymn. of a vinyl monomer different from the monomer in step (a) in the reaction medium contg. the macroinitiator from step (a), and (c) polymn. of a crosslinking monomer in the reaction medium from step (b), with ≥1 of the monomers from steps (a), (b), and (c) having ≥1 group selected from CO2H, SO3H, NH4, ethylene oxide, amino, and amide, with the group optionally existing in the presence of a salt. [on SciFinder(R)]

Published
2008

39. Surfactant-free ab initio emulsion polymerization of vinyl acetate using a dextran-based xanthate agent synthesized by click chemistry

Author

Save, Maud, Bernard, Julien, Arathoon, Benoit, Charleux, Bernadette, Chimie des polymères (LCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut Parisien de Chimie Moléculaire (IPCM), Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire de Recherche sur l'Environnement et les Matériaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS), Ingénierie des Matériaux Polymères - Laboratoire des Matériaux Macromoléculaires (IMP-LMM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet [Saint-Étienne] (UJM)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut pluridisciplinaire de recherche sur l'environnement et les matériaux (IPREM), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.POLY]Chemical Sciences/Polymers, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2008

40. Probing the internal structure of magnetic nanocomposites – thermo-sensitive gels and lamellar films – respectively by small angle neutron scattering and neutron reflectivity

Author

Douadi-Masrouki, Siham, Frka-Petesic, Bruno, Kharrat, Delphine El, Sandre, Olivier, Save, Maud, Charleux, Bernadette, Cabuil, Valérie, Liquides Ioniques et Interfaces Chargées (LI2C), Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Chimie des polymères (LCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut Parisien de Chimie Moléculaire (IPCM), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.POLY]Chemical Sciences/Polymers, [CHIM.MATE]Chemical Sciences/Material chemistry
Abstract

In this poster we show two types of nanocomposite materials consisting of nanoparticles embedded in polymer matrices. On the one hand, a matrix with a high degree of organization is investigated for visible light optics and hyper-frequencies applications (reflectors, guides, antennae). On the other hand, a gel matrix with an isotropic loading of nanoparticles can exhibit a swelling transition triggered by an external field (electric or magnetic) or by temperature. The first system combines the self-assembly of a symmetrical diblock copolymer matrix poly(n-butylmethacrylate)-b–poly(styrene) (PBMA-b-PS) and the orientation properties under magnetic field of Γ-Fe2O3 nanoparticles. To confine the nanoparticles within the layers of PBMA-b-PS (Fig.1a), those were coated by a polymeric shell grown by surface initiation polymerization of PS ("grafting from"). Thin films obtained by spin-coating and annealing above the glass temperature Tg were doped with nanoparticles. The lamellar order was investigated by neutron reflectivity experiments (Fig.1b) which enable to fit the density profile of the films and to localize precisely the nanoparticles within the first PS blocs. The second system consists of the same iron oxide nanoparticles, which are confined this time within spherical clusters of PTEA-PAM (Fig.2a., cf. Pr. Perzynski), dispersed into a thermosensitive hydrogel of poly(N-isopropylacrylamide) PNIPAM. The deswelling of the matrix above the transition temperature causes the decrease of the average distance between those clusters, as shown by small angle neutron scattering experiment (Fig.2b).

Published
2007

41. The Lamellar Structure In Magnetic Nanocomposite Thin Films

Author

Douadi-Masrouki, Siham, Sandre, Olivier, Save, Maud, Charleux, Bernadette, Cabuil, Valérie, Liquides Ioniques et Interfaces Chargées (LI2C), Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Chimie des polymères (LCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut Parisien de Chimie Moléculaire (IPCM), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.POLY]Chemical Sciences/Polymers
Abstract

Nanocomposite materials which associate inorganic nanoparticles and polymers with a high degree of organization are highly interesting for their applications in visible light optics (reflectors and guides) and hyper-frequencies (antennae and switches). We focus our study on a complex system combining the self-organization of a symmetrical poly(n-butylmethacrylate)-b– poly(styrene) diblock copolymer (PBMAb- PS) and the orientation properties under magnetic field of inorganic magnetic nanoparticles made of gamma-Fe2O3 iron oxide. To confine those magnetic nanoparticles within the layers of diblock copolymer and thus obtain a lamellar order, it is necessary to coat these nanoparticles with a polymer of the same nature than one bloc of the copolymer. Such a polymeric shell can be grown by initiating polymerization of PS chains at the surface of the nanoparticles ("grafting from") or by adsorbing endfunctionnalized PS chains ("grafting on"). By spin-coating a solution of PBMA-b-PS with or without PS coated nanoparticles in a volatile solvent on a flat silicon wafer and annealing above the glass temperature, we obtain the ordering of the thin film into layers of PBMA alternating with layers of PS doped with nanoparticles. This lamellar order is detected by AFM observation showing characteristic defects such as "islands" and "holes" and by measurements of the lamellar period by Neutron Reflectivity experiments.

Published
2007

42. Polymerization in Aqueous Dispersed Media

Author

Charleux, Bernadette, Ganachaud, Francois, Chimie des polymères (LCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut Parisien de Chimie Moléculaire (IPCM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), K. Matyjaszewski, Y. Gnanou, L. Leibler, and Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.POLY]Chemical Sciences/Polymers
Published
2007

43. Synthesis of block copolymer by ATRP for the combination with magnetic nanoparticles to obtain nano-composite films

Author

Douadi-Masrouki, Siham, Sandre, Olivier, Save, Maud, Charleux, Bernadette, Cabuil, Valérie, Liquides Ioniques et Interfaces Chargées (LI2C), Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Chimie des polymères (LCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut Parisien de Chimie Moléculaire (IPCM), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.POLY]Chemical Sciences/Polymers, [CHIM.MATE]Chemical Sciences/Material chemistry
Published
2006

44. Synthesis of block copolymers by ATRP for the combination with magnetic nanoparticles to obtain nano-composite films

Author

Douadi-Masrouki, Siham, Sandre, Olivier, Save, Maud, Rousseau, Jean-Jacques, Hamdoun, Bassam, Charleux, Bernadette, Cabuil, Valérie, Liquides Ioniques et Interfaces Chargées (LI2C), Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Chimie des polymères (LCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut Parisien de Chimie Moléculaire (IPCM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Dispositifs et Instrumentation en Optoélectronique et micro-ondes (DIOM), Université Jean Monnet - Saint-Étienne (UJM), Faculté d'Ingénieurs de l'Université Islamique du Liban, Université Islamique du Liban, and Université Jean Monnet [Saint-Étienne] (UJM)

Subjects
[CHIM.POLY]Chemical Sciences/Polymers, [CHIM.MATE]Chemical Sciences/Material chemistry
Abstract

Nanocomposite materials which associate inorganic nanoparticles and polymers with a high degree of organization are highly interesting for their applications in visible light optics (reflectors and guides) and hyper-frequencies (antennae and switches). We focus our study on a complex system combining self-organization of a diblock copolymer A-B and orientation properties under magnetic field of inorganic magnetic nanoparticles. We present here an experimental protocol for the synthesis by Atom Transfer Radical Polymerization (ATRP) of the symmetrical poly(n-butylmethacrylate)-b–poly(styrene) diblock copolymer (PBMA-b-PS) with high molar masses (about 100 000 g/mol). After spin-coating on a flat substrate (float glass, silicone or alumina) from a solution in a volatile solvent and annealing above the glass temperature, a thin film of such well-defined symmetrical diblocks are expected to self-organize into a lamellar (smectic type) order. The second component of the system consists in nanoparticles made of either superparamagnetic maghemite oxide Γ-Fe2O3 (soft magnets) or ferrimagnetic cobalt ferrite CoO.Fe2O3 (strong magnets). We are working on the proper dispersion of these nanoparticles within the PS blocks in order to obtain “sandwiches” made of magnetic thin layers alternating with the lamellae of the copolymer matrix. Optical Reflection Interference Contrast Microscopy (RICM) is convenient and fast to measure the thickness of the films (from a number of fringes) directly on their substrate and to detect characteristic defects of the long-range organization of the films (like holes). High resolution microscopies such as AFM and TEM will enable to measure the lamellar period but require to prepare thin films cross-sections.

Published
2005

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