Abstract: This invention relates to a treatment process for a material chosen from among a polyamide, a polyester and a poly(meth)acrylate. According to the invention, this process comprises a step in which contact is made between this material and a polar organic solvent in a supercritical fluid. This invention also relates to a process for manufacturing a part from a material chosen from among a polyamide, a polyester and a poly(meth)acrylate in a divided form. Finally, the invention relates to use of the material treated by the treatment process and to use of the part manufactured by the manufacturing process in the low voltage, medium voltage or high voltage electrical industry.

Abstract: A nano- or microparticle comprising a matrix consisting of or comprising at least one polyvinyl alcohol (PVA) and dispersed therein, ferrite, and a method for producing the same. Further, the use of these nano- or micro-particles for the preparation and the implementation of devices that can be detected by giant magnetoresistance sensors (GMR sensors) as biological diagnostic tools.

Abstract: Solution for use in filling micrometer-size cavities (10), the solution comprising a first solvent, a first polymer (102) having a first molecular weight, a second polymer (103) having a second molecular weight, luminophores (101) and a surfactant, the second molecular weight being 10 to 50 times greater than the first molecular weight.

Abstract: A process for chemically modifying a polymeric part in order to impart antistatic properties thereto or to improve these properties, comprising the following steps: a step of reacting a polymeric part comprising at least one polymer comprising, as reactive groups, amine groups and/or hydroxyl groups, with a functional compound, also called first compound, comprising at least one isocyanate group and at least one heterocyclic type polymerisable group, the isocyanate groups covalently reacting with all or part of the amine groups and/or hydroxyl groups of the polymer(s), whereby this results in a polymeric part that is covalently bonded to residues of the functional compound; from the heterocyclic type polymerisable groups of the residues of the functional compound, a step of polymerising a second compound comprising at least one heterocyclic type polymerisable group in the presence of a metal complex, the reaction step and the polymerisation step being carried out in the presence of at least one supercritical

Abstract: A method for chemically modifying a wood part comprising hydroxyl groups comprising: a first step of covalently reacting all or part of the hydroxyl groups with at least one non-polymeric compound comprising at least one group capable of covalently reacting with a hydroxyl group, whereby the wood part is thus covalently linked to residues of the non-polymeric compound(s); after or simultaneously with the first step, a second step of covalently reacting all or part of the residues of the non-polymeric compound(s) with at least one second compound, the first step and the second step being performed in the presence of at least one supercritical fluid.

Abstract: A thermo-fluorescent optical fiber including a core able to propagate light and a sheath, the fiber carrying at least at one of its ends or at one site along its length, devoid of sheath, the optical fiber being provided with a probe consisting of a matrix having thermo-fluorescent particles, the matrix being photo-polymerized. Also provided is a method that relates to manufacturing such an optical fiber as well as to its applications.

Abstract: A process for chemically modifying a polymeric part in order to impart flame-retardant properties thereto or to improve the properties, the process comprising the following steps: a step of reacting a polymeric part comprising at least one polymer comprising, as reactive groups, amine groups and/or hydroxyl groups, with a functional compound, referred to as first compound, comprising at least one isocyanate group and at least one vinyl type polymerisable group, the isocyanate groups reacting, covalently with all or some of the amine groups and/or hydroxyl groups of the polymer(s), resulting in a polymeric part bonded, covalently, to residues of the functional compound; using the vinyl type polymerisable groups of the residues of the functional compound, a step of polymerising a second compound comprising at least one vinyl type polymerisable group and at least one group comprising at least one phosphorus atom, the reaction step and said polymerisation step being carried out in the presence of at least one sup

Abstract: A chemical modification process for a polymer component comprising at least one polymer comprising, as reactive groups, amine groups and/or hydroxyl groups, the process comprising a step of covalent reaction between some or all of the reactive groups and at least one functional compound comprising at least one group able to react in a covalent manner with said reactive groups, the functional compound(s) being selected from epoxide compounds, anhydride compounds, acyl halide compounds, silyl ether compounds and mixtures thereof, characterised in that the covalent reaction step is carried out in the presence of at least one supercritical fluid.

Abstract: Provided is a method for securely diversifying a generic application stored in a secure processor of a terminal, said method comprising: Generating at the request of a manager application hosted in an application processor of said terminal, at the level of a distant server, a server challenge; Sending said server challenge to said application; Generating a first message at said application, said first message being function of said server challenge, an application challenge and an unique identifier of said application; Sending said first message to a Root-Of-Trust service hosted in a secure processor of said terminal, said Root-of-Trust service generating an attestation of said first message, said attestation guaranteeing that said first message has not been modified and originates from said secure processor; and Transmitting said attestation of said first message to said distant server in an enablement request message.

Abstract: A method for manufacturing a compound comprising at least one imine group, the method comprising a step of reaction between a first compound comprising at least one amine group and a second compound comprising at least one carbonyl group, the reaction step being carried out in the presence of at least one supercritical fluid.

Abstract: A method for treating a polymer part comprising a step of bringing the part into contact with vapours of solvent(s), capable of at least partially solubilising the part, this contacting step being carried out under vacuum. Application of this method for modifying the roughness of the part and/or functionalising it.

Abstract: A method for functionalizing the surface of a substrate, performed in a supercritical fluid medium, may include: (i) providing a substrate having labile hydrogen functions on the surface; (ii) bringing the substrate into contact, in a supercritical fluid, with at least one organic molecule carrying at least one blocked isocyanate function which can be activated by heating; and (iii) subjecting the whole to a temperature sufficient to bring about the release of the blocked isocyanate function carried by the molecule, and the covalent grafting of the molecule by reaction of the isocyanate function with a labile hydrogen function on the surface of the substrate.

Abstract: Particle (1) which comprises a core (2) made of copper, of a copper alloy, of aluminium or of an aluminium alloy, covered with an external layer (3), where the external layer (3) is formed from metal nanoparticles or carbon nanotubes.

Abstract: In the field of papermaking and more particularly a method for producing paper impregnated with a molecule of interest, particularly colored paper, and the associated product, i.e. impregnated paper, there is a disclosed a method implementing a supercritical-pressure fluid. Such paper, particularly colored paper, obtained from a formulation of paper pulp or paper including latex, does not bleed when it comes into contact with water.

Abstract: This invention relates to a treatment process for a material chosen from among a polyamide, a polyester and a poly(meth)acrylate. According to the invention, this process comprises a step in which contact is made between this material and a polar organic solvent in a supercritical fluid. This invention also relates to a process for manufacturing a part from a material chosen from among a polyamide, a polyester and a poly(meth)acrylate in a divided form. Finally, the invention relates to use of the material treated by the treatment process and to use of the part manufactured by the manufacturing process in the low voltage, medium voltage or high voltage electrical industry.

Abstract: The invention relates to an acoustic phase mask, the phase mask having a variation in the acoustic index n, characterized in that the phase mask comprises a body comprising: at least one matrix formed from a deformable solid material, having a shear modulus of less than 10 MPa, and pores formed in the matrix, the pores being mostly filled with gas, the deformable solid material extending between the pores, the body having a porosity ? less than or equal to 50%, and a controlled porosity ? gradient resulting in a variation of the acoustic index n spatially in the body.

Abstract: Solution for use in filling micrometer-size cavities (10), the solution comprising a first solvent, a first polymer (102) having a first molecular weight, a second polymer (103) having a second molecular weight, luminophores (101) and a surfactant, the second molecular weight being 10 to 50 times greater than the first molecular weight.

Abstract: A method for preparing coated metal nanoparticles, each nanoparticle comprising a core constituted of at least one metal M and a layer constituted of at least one polymer, the layer coating the metal core. The method comprises the steps: (a1) preparing a solution A comprising the at least one metal M in the form of cations Mn+, n being an integer comprised between 1 and 3, each metal M being a transition metal of atomic number comprised between 21 and 30, a polyol, and a noble metal salt; (a2) preparing a solution B comprising at least one organic monomer of the at least one polymer, in an organic solvent; (b) mixing solutions A and B, this mixture being heated to the boiling temperature of the polyol; and (c) recovering the coated metal nanoparticles.

Abstract: A method for coloring of cellulose in a supercritical CO2 medium by an uncharged hydrophobic dye, including at least the steps including of: (i) provision of cellulose fibers, (ii) placing the cellulose fibers in the presence of: a) an effective quantity of at least one uncharged mono organo-urea primer of formula R—NH—CO—NH2, where R represents a linear or branched, saturated or unsaturated, hydrocarbon chain possessing at least 3 carbon atoms, or a saturated or unsaturated cyclic hydrocarbon radical, which is bonded directly or via a methylene or ethylene group to a nitrogen atom, and if appropriate substituted under conditions conducive to the forming of a covalent carbamatic bond between the cellulose and the molecules of the organo-urea; and b) at least one hydrophobic dye in a supercritical CO2 medium, under conditions conducive to the immobilization of the dye on the fibers.

Abstract: A process for preparing hollow particles of aluminosilicates having a spherical shape of allophane type which are hybrid at the core, comprising: (a) having, at ambient temperature, an aqueous medium containing at least one aluminum precursor and one silicon alkoxide in an Al/Si molar ratio varying from 1 to 3, (b) carrying out, with stirring, the alkaline hydrolysis of said medium with gradual addition of at least one base in a base/Al molar ratio of 2.3 to 3, (c) maintaining, on conclusion of the addition of all of said base, stirring at ambient temperature until said medium is obtained in the clear state, and (d) heating the solution obtained at a temperature varying from 50 to 150° C. for 2 to 8 days, the combined stages (a) to (d) are carried out within a reactor consisting of a material which is chemically inert with respect to the reactants and expected aluminosilicate.