Abstract: The present invention relates to a process for treating a polyamide-based material comprising silica fibers and/or fillers, by impregnation with at least one hydrophobic additive in supercritical CO2. The invention also relates to a polyamide-based material comprising silica fibers and/or fillers and impregnated with at least one hydrophobic additive, obtained via such a process, and to the use thereof as an electrically insulating component in an electrical device, in particular in a circuit breaker.

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: The invention seeks protection for a novel method for the surface functionalization of solid materials with one or more active ingredients intended to confer specific properties thereon, such as anti-UV, fluorescence or coloring properties.

Abstract: The present invention relates to a process for treating a polyamide-based material comprising silica fibers and/or fillers, by impregnation with at least one hydrophobic additive in supercritical CO2. The invention also relates to a polyamide-based material comprising silica fibers and/or fillers and impregnated with at least one hydrophobic additive, obtained via such a process, and to the use thereof as an electrically insulating component in an electrical device, in particular in a circuit breaker.

Abstract: An organic CMOS circuit including a substrate having an N-type organic transistor and a P-type organic transistor formed thereon, the transistors respectively including a layer of N-type semiconductor material and a layer of P-type semiconductor material. A surface of each of the semiconductor material layers, opposite to the substrate, is covered with an anti-ultraviolet layer made of electrically-insulating material absorbing and/or reflecting ultra-violet rays.

Abstract: The use of hollow particles of hybrid aluminosilicates of imogolite or allophane type, characterized in that they have their external surface functionalized with Al—OH units and their internal surface functionalized at least in part with Si—R units, with R representing a nonhydrolyzable unit, preferably a hydrocarbon unit, as vehicle for one or more hydrophobic substances, in particular considered in the oil industry, the hydrophobic substances being chosen from any compound containing a linear or branched aliphatic chain having at least 4 carbon atoms, surfactants, biocides and methane clathrates inhibitors.

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: An organic CMOS circuit including a substrate having an N-type organic transistor and a P-type organic transistor formed thereon, the transistors respectively including a layer of N-type semiconductor material and a layer of P-type semiconductor material. A surface of each of the semiconductor material layers, opposite to the substrate, is covered with an anti-ultraviolet layer made of electrically-insulating material absorbing and/or reflecting ultra-violet rays.

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: An organic CMOS circuit including a substrate having an N-type organic transistor and a P-type organic transistor formed thereon, the transistors respectively including a layer of N-type semiconductor material and a layer of P-type semiconductor material. A surface of each of the semiconductor material layers, opposite to the substrate, is covered with an anti-ultraviolet layer made of electrically-insulating material absorbing and/or reflecting ultra-violet rays.

Abstract: The present invention relates to a process for the preparation of boron carbide nanoparticles, characterized in that it comprises at least the stages consisting in: (i) interacting boric acid, boron oxide B2O3 or a boric acid ester of B(OR)3 type, with R, which are identical or different, representing C1-4-alkyl groups, with 1 to 2 molar equivalents of at least one C2 to C4 polyol, under conditions favorable to the formation of a boron alkoxide powder; (ii) interacting, in an aqueous medium, the boron alkoxide powder obtained on conclusion of stage (i) with an effective amount of one or more completely hydrolyzed polyvinyl alcohols, with a molar mass of between 10 000 and 80 000 g.mol?1, under conditions favorable to the formation of a crosslinked PVA gel, and (iii) carrying out an oxidizing pyrolysis of the crosslinked gel formed on conclusion of the preceding stage (ii), under conditions favorable to the formation of the CB4 nanoparticles.

Abstract: The present invention relates to a method for impregnating a filter having pores suitable for retaining particles within them that may be present in a flow of air suitable for passing through the filter, according to which the filter made up of a polymer membrane is impregnated with one or more organometallic salts by applying a treatment using supercritical CO2, the metal M of each salt being chosen from among the group of rare earths, yttrium, scandium, chromium, or a combination thereof. The invention also relates to the obtained filter and an associated method for the collection and quantitative analysis of nanoparticles.

Abstract: The invention relates to nanoparticles having a core that is fully or partially formed by at least one UV-absorbing organic compound in crystallized form and coated with an outer layer formed by at least one hydrophilic polymer, said UV-absorbing organic compound(s) and hydrophilic polymer(s) being associated in a weight ratio of organic compound(s) to hydrophilic polymer(s) varying between 0.2 and 0.4.

Abstract: A device and method recovering heat energy and converting the heat energy into electrical energy by heat-sensitive molecules to which are connected magnetic particles, with the heat-sensitive molecules able to move the magnetic particles in relation to a conductive circuit to generate an induced current in the circuit.

Abstract: The use of hollow particles of hybrid aluminosilicates of imogolite or allophane type, characterized in that they have their external surface functionalized with Al—OH units and their internal surface functionalized at least in part with Si—R units, with R representing a nonhydrolyzable unit, preferably a hydrocarbon unit, as vehicle for one or more hydrophobic substances, in particular considered in the oil industry, the hydrophobic substances being chosen from any compound containing a linear or branched aliphatic chain having at least 4 carbon atoms, surfactants, biocides and methane clathrates inhibitors.

Abstract: The invention relates to a process for manufacturing nanoparticles that are self-dispersing in water. It also relates to the self-dispersing nanoparticles obtained by the process of the invention and also a process for manufacturing a heat-transfer fluid containing the nanoparticles according to the invention or obtained by the process of the invention.

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.

Abstract: The invention relates to a method for in-situ synthesis of silicon nanoparticles in a thermosetting polymeric matrix, the thermosetting and thermoset matrices obtained in this way and a material including same. The method includes the following steps: a) forming an aqueous-phase/organic-phase inverse emulsion, wherein the aqueous phase includes at least a basic catalyst and the organic phase includes at least a non-cross-linked (co)polymer precursor chosen from an aliphatic, cycloaliphatic or aromatic epoxy resin precursor, a polyester-imide precursor, an unsaturated/epoxy polyester (co)polymer precursor, a polyether/epoxy (co)polymer precursor and a polyurethane precursor; b) introducing, into the inverse emulsion formed in step a), at least one silicon precursor forming a complete network whereof the rate of hydrolysis is greater than the cross-linking speed of the (co)polymer and c) stirring the mixture obtained in step b) and heating to a temperature between 20° C. and 70° C.

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: The invention relates to a thermally conducting capsule which has a core-shell structure and in which the core, which is surrounded by a tight single-layer or multilayer shell, is loaded with at least one phase change material (PCM). The invention is characterized in that the capsule also contains particles made of an additional conducting material at least in the shell, said particles made of the additional conducting material having a thermal conductivity greater than 100 W/m/K. The invention further relates to the use of said capsule in a heat-conducting material, in particular a thermal fluid, in order to modulate the heat capacity thereof.