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Featured researches published by Hervé Plaisantin.


Chemistry: A European Journal | 2017

Molecular Level Processing of Si-(B)-C Materials with Tailored Nano-/Microstructures

Marion Schmidt; Charlotte Durif; Emanoelle Diz Acosta; Chrystelle Salameh; Hervé Plaisantin; Philippe Miele; Rénal Backov; Ricardo Antonio Francisco Machado; Christel Gervais; Johan Alauzun; G. Chollon; Samuel Bernard

The design of Si-(B)-C materials is investigated, with detailed insight into the precursor chemistry and processing, the precursor-to-ceramic transformation, and the ceramic microstructural evolution at high temperatures. In the early stage of the process, the reaction between allylhydridopolycarbosilane (AHPCS) and borane dimethyl sulfide is achieved. This is investigated in detail through solid-state NMR and FTIR spectroscopy and elemental analyses for Si/B ratios ranging from 200 to 30. Boron-based bridges linking AHPCS monomeric fragments act as crosslinking units, extending the processability range of AHPCS and suppressing the distillation of oligomeric fragments during the low-temperature pyrolysis regime. Polymers with low boron contents display appropriate requirements for facile processing in solution, leading to the design of monoliths with hierarchical porosity, significant pore volume, and high specific surface area after pyrolysis. Polymers with high boron contents are more appropriate for the preparation of dense ceramics through direct solid shaping and pyrolysis. We provide a comprehensive study of the thermal decomposition mechanisms, and a subsequent detailed study of the high-temperature behavior of the ceramics produced at 1000 °C. The nanostructure and microstructure of the final SiC-based ceramics are intimately linked to the boron content of the polymers. B4 C/C/SiC nanocomposites can be obtained from the polymer with the highest boron content.


Plasma Chemistry and Plasma Processing | 2014

Non Thermal Plasma Functionalized 2D Carbon–Carbon Composites as Supports for Co Nanoparticles

Julien Souquet-Grumey; Philippe Ayrault; Olivier Heintz; Joël Barrault; Jean-Michel Tatibouët; Hervé Plaisantin; Jacques Thebault; Sabine Valange; Elodie Fourré

AbstractNovel two-dimensional carbon–carbon composites made of carbon nanofibers (CNFs) supported on a carbon preform were functionalized by non thermal plasma treatment (room temperature, atmospheric pressure, humid air), before being used as supports for metallic cobalt nanoparticles. It was shown that the degree of functionalization of the carbon nanofibers depends on the plasma power input, the treatment time and the CNF loading. The size of the cobalt nanoparticles generated after subsequent reduction of the Co-containing plasma treated CNF/C composites under hydrogen flow seems to be independent of the amount of supported cobalt. Changes in surface characteristics were analyzed using thermogravimetric analyses coupled to a mass spectrometer, X-ray photoelectron spectroscopy analyses and Raman spectroscopy. Transmission electron microscopy was used to complementary characterize the final size, dispersion and location of the so generated Co nanoparticles.


Composites Science and Technology | 2001

Conversion of cellulosic fibres into carbon fibres: a study of the mechanical properties and correlation with chemical structure

Hervé Plaisantin; René Pailler; Alain Guette; Gérard Daudé; Michel Petraud; B Barbe; Marc Birot; J.-P. Pillot; Pierre Olry


Journal of Materials Science | 2006

Ex-cellulose carbon fibres with improved mechanical properties

Hervé Plaisantin; René Pailler; Alain Guette; Marc Birot; J.-P. Pillot; Gérard Daudé; Pierre Olry


Surface & Coatings Technology | 2010

In-situ processing of carbon coatings on the surface of SiC-based fibers

A. Delcamp; L. Maillé; B. Rufino; S. Mazerat; René Pailler; Alain Guette; Patrick Weisbecker; Hervé Plaisantin; Eric Philippe; Sylvie Loison


Archive | 2009

METHOD FOR PROCESSING CERAMIC FIBERS

Hervé Plaisantin; René Pailler; Adrien Delcamp; Eric Philippe


Journal of Analytical and Applied Pyrolysis | 2008

Investigation of the pyrolysis mechanisms of cellobiose in the presence of a polysiloxane

Marc Birot; Jean-Paul Pillot; Gérard Daudé; René Pailler; Alain Guette; Hervé Plaisantin; Sylvie Loison; Pierre Olry; Patrick Simon; Christine Labrugère; Michel Petraud


Journal of The European Ceramic Society | 2018

Improvement of silicon carbide fibers mechanical properties by Cl2 etching

Stéphane Mazerat; Adrien Delcamp; René Pailler; Jacques Lamon; Hervé Plaisantin


Archive | 2014

Verfahren zur Herstellung eines monolithischen Katalyseelements, umfassend einen faserigen Träger und das monolithische Katalyseelement

Jacques Thebault; Julien Souquet-Grumey; Hervé Plaisantin; Sabine Valange; Jean-Michel Tatibouët; Joël Barrault


Archive | 2012

Verfahren zur Herstellung eines monolithischen Katalyseelements, umfassend einen faserigen Träger und das monolithische Katalyseelement A method for manufacturing a monolithic catalytic element, comprising a fibrous carrier and the monolithic catalytic element

Jacques Thebault; Julien Souquet-Grumey; Hervé Plaisantin; Sabine Valange; Jean-Michel Tatibouët; Joël Barrault

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Julien Souquet-Grumey

Centre national de la recherche scientifique

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Marc Birot

University of Bordeaux

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