摘要:
The aim of the invention is to improve the surface characterization of solid materials, facilitating the implementation thereof, while producing reliable and accurate results. The method of the invention comprises the following steps: obtaining a material (M) to be characterized, in powder form, and a gas mixture (G) containing a probe molecule (S) that can interact with the material, performing gas percolation through the material by flowing the gas mixture into the free spaces between the grains of the material, while leaving said grains in contact with each other, during the gas percolation through the material (M), measuring a radiative heat flux (F) emitted by the material, and at least one surface characteristic relating to the material (M) is deduced from the radiative heat flux (F) measurements.
摘要:
The invention proposes an improvement in the characterization of solid materials, by making it easier to be implemented while obtaining reliable and accurate results. According to the method in accordance with the invention; a material to be characterized (M), in powdery form is placed in a well (4); while the material (M) is heated up by applying a predetermined power (P), a radiative thermal flux (F) emitted by the material is measured, and from the measurements relating to the radiative thermal flux (F), a characterization of the material (M) is inferred, related to the heat which this material loses by thermal conduction with the walls of the well (4).
摘要:
The present invention relates to a process which comprises preparing polymers. The process uses an appropriate installation, and may comprise determining at least one parameter of a physical and/or chemical conversion. The invention also relates to a corresponding screening process. According to this process, a polymerization reaction medium is made to flow in a tubular flow member.
摘要:
Physico-chemical systems subject to transformation are flowed in a flow member, while maintaining the external periphery of the wall of such flow member at one and the same temperature, with the exception of a display zone, at least between two remote points along said member; at least one spatial distribution of the temperature of the physico-chemical system along this display zone is displayed, in particular comprising an infrared camera, and the or each parameter is determined therefrom utilizing the or each spatial temperature distribution.
摘要:
The invention relates to a photovoltaic coating containing a mixture of organic N-type (acceptor) and P-type (donor) semiconductor compounds, which makes it possible, when selecting the donor/acceptor pair, to modulate the semiconductor properties of the photovoltaic coating so as to enable the use thereof within a photovoltaic device, wherein one of the organic semiconductors includes a quinone core.
摘要:
The present invention relates to a process which comprises preparing polymers. The process uses an appropriate installation, and may comprise determining at least one parameter of a physical and/or chemical conversion. The invention also relates to a corresponding screening process. According to this process, a polymerization reaction medium is made to flow in a tubular flow member (12).
摘要:
Mineral particle dispersions in an organic hydrophobic medium (organosols) are stabilized by amphiphilic block polymers containing RA groups for developing interactions with the surface of the particles and at least one hydrophobic block B having an affinity for the organic medium of the dispersion.
摘要:
The present invention relates to a method for producing a coating based on two organic semi-conducting compounds CP and CN, respectively of type P and of type N, CN being immiscible with compound CP in the coating produced, and wherein: (A) a solution is deposited on the surface of the support, comprising compounds CP and CN in a solvent medium S capable of solvating compounds CP and CN without chemically reacting therewith, said solvent S being formed by a mixture of: a first fraction formed by a solvent or a mixture of solvents S1 capable of solvating both compounds CP or CN; and a second fraction miscible with the first fraction consisting of a solvent or a mixture of solvents S2 with a higher boiling point than that of the solvent or mixture of solvents S1 and which is capable of solvating one of the compounds CP or CN but not the other one; and (B) the solvent S present in the thereby produced deposit is removed by evaporation.
摘要:
A method, in which a succession of plugs (G) made of a physicochemical system capable of conversion in a carrier phase (P) is made to flow, in a tubular flow member (12), and at least one analysis of at least one plug is carried out and the or each parameter is deduced therefrom.