Centre National De La Recherche Scientifique

Université Paul Sabatier (Toulouse III)

Luzenac Europe Sas

Centre National De La Recherche Scientifique-Cnrs

Imerys Talc Europe

François Martin

Pierre Micoud

Cyril Aymonier

Christophe Le Roux

Jean-Pierre Bonino

Angela Dumas

Marie Claverie

Mathilde Poirier

Jocelyne Ferret

Didier Arseguel

Eric Ferrage

Sabine Petit

Olivier Grauby

Alain Decarreau

Suzanne Fery-Forgues

Emmanuel Gardes

Patrice Bacchin

Stéphane Vaillant

William Vautrin

Cédric Lebre

Philippe Barthes

Vincent Baylac

A method for preparing an organic/inorganic hybrid composition including mineral nanoparticles functionalized by at least one molecule chosen from colored charged organic molecules, this method including providing a solution (a) of at least one colored charged organic molecule, providing a suspension (b) of non-swelling phyllosilicate nanoparticles, contacting the solution (a) and the suspension (b), the non-swelling phyllosilicate nanoparticles having a thickness of 1 nm to 100 nm, and a larger dimension of 10 nm to 10 μm. A composition of organic/inorganic hybrid colored nanoparticles obtained by this method is also disclosed.

Colored organic/inorganic hybrid materials and method for preparing same

Disclosed is a method for preparing a hybrid organic/inorganic composition including inorganic nanoparticles functionalized by at least one molecule chosen from photoluminescent charged organic molecules, the method including bringing into contact, in a single-phase solvent medium, at least one photoluminescent charged organic molecule and non-swelling phyllosilicate nanoparticles having a thickness of 1 nm to 100 nm, and a larger dimension of 10 nm to 10 &#x3bc;m. Also disclosed are hybrid photoluminescent nanoparticles compositions obtained by this method.

Photoluminescent hybrid organic/inorganic materials and method for preparing same

The invention relates to a method for preparing synthetic mineral particles with formula (AlM)(SiGe)O(OH), wherein M designates at least one trivalent metal selected from the group made up of gallium and the rare earths, which comprises the following steps: preparing a gel which is a precursor of said synthetic mineral particles by a co-precipitation reaction of at least one salt of metal selected among aluminium and M with at least one silicon source selected from the group made up of potassium metasilicate, sodium metasilicate, potassium metagermanate and sodium metagermanate, the molar ratio of (AlM) to (SiGe) during the preparation of said precursor gel being equal to 1, at least one base being added during said co-precipitation reaction; and performing a solvothermal treatment of said precursor gel at a temperature of 250&#xb0; C. to 600&#xb0; C.

Method for preparing synthetic mineral particles

The invention relates to a mineral compound, referred to as synthetic mica, with formula A(Si-Ge)MO(OH), wherein: A designates at least one monovalent interfoliar cation of a metal element, A having the formula LiNaKRbCs, each instance of w(i) representing a real number in the interval [0; 1], such that the sum of the instances of w(i) is equal to 1; t is a real number in the interval [0.3; 1]; x is a real number in the interval [0; 1]; M designates at least one divalent metal having the formula MgCoZnCuMnFeNiCr, each instance of y(i) representing a real number in the interval [0; 1], such as the formula (A); and z is a real number in the interval [2.50; 2.85]. The invention also relates to a composition comprising such a compound and a method for preparing such a compound. 

Synthetic mineral compound, composition including such a compound and method for manufacturing such a compound

The invention relates to a composite material including a metal matrix in which synthetic lamellar phyllosilicated mineral particles are distributed, characterized in that the lamellar phyllosilicated mineral particles are particles also called synthetic phyllosilicated nanoparticles (6) that are mineral, silico/germano-metal, lamellar, synthetic and hydrophilic, and have an average size of between 10 nm and 1 nm. The invention also relates to a substrate that comprises a lubricating coating consisting of such a material, and to an electrolytic deposition preparation method.

Composite material consisting of a metal matrix in which synthetic lamellar phyllosilicated nanoparticles are distributed

The invention relates to a lubricating metal coating and to a process for its preparation. The material constituting the coating in a composite material comprising a metal matrix within which talc particles are distributed as lamellae, the metal matrix being composed of a metal chosen from Fe, Co, Ni, Mn, Cr, Cu, W, Mo, Zn, Au, Ag, Pb or Sn or of an alloy of these metals or of a metal/semimetal alloy. The coating is obtained by a process consisting in carrying out an electrolytic deposition using a solution of precursors of the metal matrix of the coating which additionally comprises talc particles in suspension, which particles are modified at the surface by irreversible adsorption of a cellulose-derived compound by replacement of all or part of the hydroxyl groups.

Composite material composed of a metal matrix and of talc

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Saint Foy d'Aigrefeuille, France

François Martin