123results about How to "Highly uniform dispersion" patented technology

By employing a method of producing a carbon nanotube dispersion liquid, in which a carbon nanotube modified with a basic or acidic functional group is dispersed in a polar solvent having a polarity opposite to a polarity of the functional group, there is provided a carbon nanotube dispersion liquid having a high dispersion stability, in which a carbon nanotube is uniformly dispersed without using any surfactant or the like. By using the carbon nanotube dispersion liquid, a polymer composite in which a carbon nanotube is uniformly dispersed without being mixed with an impurity can be provided. In addition, a method for producing the polymer composite by relatively simple procedures is also provided.

The invention discloses a preparation method of a composite ceramic filter core containing diatomite and charcoal. In the preparation method, raw materials with high melting points are not used, and a mode of first dispersion and then partial flocculation is used for preparing a slurry for slip casting to enable raw materials and pores in a green body to be highly and uniformly dispersed, thus the sintering temperature is not higher than 950 DEG C, and natural micropores in the diatomite can not collapse because of high-temperature sintering.

The invention relates to a catalyst for producing low-carbon olefin by using synthesis gas and a preparation method of the catalyst, and is mainly used for solving the problem of low CO conversion rate and low low-carbon olefin selectivity in reaction for preparing the low-carbon olefin by using the synthesis gas in the prior art. The catalyst consists of a composite carrier and active components, wherein the composite carrier consists of alpha-aluminium oxide and a ZSM-5 molecular sieve; the silicon-aluminium ratio of the ZSM-5 molecular sieve is 40-200; the active components are loaded on the composite carrier and comprise the following compounds with chemical formulas by atomic ratio: Fe100AaBbCcOx, A is at least one of transition metals of Cu and Mn, B is at least one of lanthanide La and Ce, and C is at least one of alkaline metals of K and Cs; the weight of the composite carrier is 20%-80% of the weight of catalyst; by weight percent of the composite carrier, the weight of alpha-aluminium oxide is 20%-99% of the weight of the composite carrier. With the adoption of the technical scheme, the problem is well solved; the catalyst can be used for industrial production of the low-carbon olefin produced by using the synthesis gas.

The invention discloses a preparation method for synthesizing a graphene loaded noble metal catalyst in an organic phase, and belongs to the technical field of catalysts and preparation thereof. The method mainly comprises the following steps of: preparing pre-oxidized graphite powder; preparing glassy yellow oxidized graphite solution; preparing an oxidized graphite solid; dispersing oxidized graphite in N-methylpyrrolidone solution, and stripping the oxidized graphite by ultrasonic processing to prepare the N-methylpyrrolidone solution of oxidized graphene; and adding a stabilizing agent and a precursor of noble metal into the N-methylpyrrolidone solution of oxidized graphene, mixing fully, and heating to obtain the graphene loaded monodisperse noble metal catalyst in one step. The graphene loaded noble metal nano particle catalyst prepared by the method has high structural stability, dispersibility, stability and activity and large specific surface area.

The invention discloses a preparation method of a nano zero-valent iron loaded hydrophilic porous biochar composite material, relates to preparation methods of hydrophilic porous biochar composite materials, and aims to solve the problems that an existing matrix loading metal particles is high cost, and nano zero-valent iron is unstable and prone to agglomeration and is low in performance when being applied to heavy metal adsorption. The method includes the steps of firstly, subjecting biomass to pyrolysis and molten salt activation; secondly, preparing a hydrophilic porous biochar material; thirdly, loading the nano zero-valent iron to obtain the nano zero-valent iron loaded hydrophilic porous biochar composite material. The specific surface area of the prepared nano zero-valent iron loaded hydrophilic porous biochar composite material can reach 603.4m<2>*g<-1>. Due to the fact that corn straw is agricultural waste which is low in cost and wide in source, the cost of the preparation method is lowered by using the pyrolysis product of the corn straw as the matrix material. The prepared nano zero-valent iron loaded hydrophilic porous biochar composite material is applicable to the field of environmental pollution remediation.

A fire suppression apparatus and method of generating foam are provided in which a foam-forming liquid is introduced under high velocity and pressure into a mixing manifold through a plurality of jets, and a non-combustible gas is introduced under high velocity and pressure into the center of the mixing manifold, downstream of the jets and in the direction of flow of the foam-forming liquid. The foam generated in the mixing manifold is discharged through a hose and nozzle connected to the mixing manifold. The apparatus may be a self-contained unit, supported on a frame, with its own supply of foam-forming liquid and non-combustible gas.

A method of producing a fuel hose material which is obtained at low costs and has excellent properties such as antistatic property, resistance to thermal aging and resistance to sour gasoline, and a material produced by the method. The method includes the steps of: dispersing a carbon nanotube in a polar plasticizer comprising at least one of a sulfonamide plasticizer and an ester plasticizer; and blending the resulting compound into a polyamide resin having a relative viscosity (ηr) of 2.5 to 3.5, in which the carbon nanotube is present in a proportion of not less than 7 wt %.

The invention discloses a magnesium aluminate spinel enhanced magnesia-based foamed ceramic filter with capability of realizing sintering at low temperature, excellent chemical stability and excellentthermal shock resistant performance, and a preparation method thereof. The preparation method comprises the following steps that (1) 10 to 20 percent of nanometer alumina sol, 0.8 to 1.5 percent of rheological agents and the balance of magnesium oxide ceramic powder containing a nanometer aluminum oxide sintering aid are proportioned; deionized water is added; ball milling and uniform mixing areperformed; then, through vacuum exhaust, ceramic slurry with the solid content being 60 to 70 percent is prepared; (2) a polyurethane foamed plastic template is soaked into the ceramic slurry; the polyurethane foamed plastic template is extruded through a roller press for removing the redundant leaching hanging slurry; then, biscuit is prepared; then, the biscuit is heated to 80 to 120 DEG C for drying; (3) the dried biscuit is put into a sintering furnace; the temperature is raised to 1400 to 1600 DEG C; high-temperature sintering is performed; cooling is performed along with the furnace to room temperature; the magnesia-based foamed ceramic filter is obtained.

A method is used to provide a toner image with a metallic effect. After forming a latent image, it is developed with metallic dry toner particles to form a developed toner image that is transferred and fixed to a receiver material. Each metallic dry toner particle consists essentially of a polymeric binder phase and non-conductive metal oxide particles. Before fixing, the metallic dry toner particle has a mean volume weighted diameter (D_vol) of at least 15 μm and up to and including 40 μm. The non-conductive metal oxide particles are present in an amount of 20-50 weight %. The ratio of the metallic dry toner particle D_vol to the average equivalent circular diameter (ECD) of the non-conductive metal oxide particles in the metallic dry toner particles, before fixing, is greater than 0.1 and up to and including 10.

The invention relates to high-dispersion graphene heat-conduction water-based paint. The high-dispersion graphene heat-conduction water-based paint is prepared from water-based paint and modifier cellulose nanocrystal/flaky graphene suspension, wherein a mass ratio of the cellulose nanocrystal/flaky grpahene suspension to the water-based paint is (1 to 7): 100, and a mass ratio of the flaky graphene in the cellulose nano crystal/flaky graphene suspension to cellulose nano crystal suspension is (0 to 2.5): 100. The preparation method comprises the following steps: (1) preparing cellulose nano crystal/flaky graphen suspension; (2) mixing the suspension and the water-based paint; (3) smearing the modified water-based paint; and (4) drying, curing, and forming a film. The high-dispersion graphene heat-conduction water-based paint has the advantages that: (1) hydroxyl on the surface of the cellulose nanocrystal sufficiently reacts with the surface active group of a graphene flake layer, sothat the graphene is highly uniformly dispersed; (2) the synergistic effect of the cellulose nanocrystal and the graphene can apparently improve the heat conductivity, impact resistance, hardness andadhesion of a coating; and (3) the high-dispersion graphene heat-conduction water-based paint is low in cost, wide in source, controllable in process and good in applicability.

The invention provides a method for preparing a needle-shaped Fe-Mn-S ternary nano-material supported porous charcoal compound material, relates to a method for preparing porous charcoal compound materials to solve the problems that an existing Fe-Mn binary nano-material is easily agglomerated and has low adsorption capacity to heavy metals. The method comprises the following steps: 1, performingpyrolytic carbonization on a biomass material; 2, performing hydrophilic treatment on the pyrolytically carbonized porous charcoal material; 3, stirring the hydrophilic porous charcoal material in a ferric salt aqueous solution, dropwise adding a manganate solution and sulfide solution for stirring, adding a weak alkaline solution for stirring, performing hydrothermal reaction, and drying to obtain the ternary nano-material supported porous charcoal compound material. According to the method, the interaction among molecules of a ternary nano-material is reduced by supporting the Fe-Mn-S ternary nano-material to the surface of the charcoal material, nano-particle agglomeration is reduced, and the dispersibility of ternary nano-particles is improved. The method is applied to the field of charcoal compound materials.

The invention relates to a catalyst for preparing low-carbon olefin from synthesis gas by a one-step method and a preparation method of the catalyst, which are mainly used for solving the problems of low CO conversion rate and low selectivity of low-carbon olefin in the reaction for preparing low-carbon olefin from synthesis gas in the prior art. The catalyst adopted by the invention comprises the following components in percentage by weight: (a) 5-60% of ferrum element or an oxide of the ferrum element; (b) 1-10% of cobalt element or an oxide thereof; (c) 4-20% of at least one element or an oxide thereof selected from strontium or magnesium; (d) 4-20% of at least one element or an oxide thereof selected from molybdenum and zirconium; (e) 1-10% of erbium element or an oxide thereof; and (f) 30-85% of a cocoanut active charcoal carrier. By adopting the technical scheme, the problem is solved well, and the catalyst and the preparation method thereof can be applied to the industrial production for preparing the low-carbon olefin from synthesis gas by using a fixed bed.

The invention discloses a vitamin D analog preparation and a preparation method thereof. The invention aims to solve the problems that a conventional preparation method of vitamin D analog has difficulty in meeting the uniformity requirement and during the granulation process, drugs are converted and degraded easily. For the first time, a double screw extrusion technology is used to prepare a solid preparation of vitamin D analog. Various vitamin D analogs are taken as model drugs, on the basis that a preparation technology of solid preparations is deeply researched, alfacalcidol, eldecalcitol, or calcitriol is chosen to prepare the solid preparation by using a double screw extruding machine; the uniformity meets the pharmacopeia requirements; the drug stability is obviously enhanced, andthe drug quality is greatly improved.

Anti-bacterial composite particles which comprise a polymer base material comprising a thermal melting polymer, such as a polyolefine, exhibiting good dispersibility in a basic material resin and having a lower molecular weight or a lower softening point than that of the basic material resin, and inorganic fine particles comprising a metal having anti-bacterial activity carried thereon. An antibacterial resin composition can be prepared by melting and kneading a synthetic resin composition as the basic material resin together with the anti-bacterial composite particles and forming by known molding methods such as extrusion molding and injection molding, and can be used for producing various synthetic resin moldings which have an inorganic anti-bacterial agent uniformly dispersed in a synthetic resin composition and thus exhibits good anti-bacterial effect.

The invention discloses a titanium dioxide/graphene composite nanometer photocatalyst, a method for preparing the same and application of the titanium dioxide/graphene composite nanometer photocatalyst. The titanium dioxide/graphene composite nanometer photocatalyst, the method and the application have the advantages that solvothermal processes are adopted, alcohol is used as a solvent, hexamethylene tetramine is decomposed under solvothermal conditions to generate alkaline and reduction species, accordingly, the titanium dioxide/graphene composite nanometer photocatalyst can be prepared at one step, and the problems of secondary stacking of graphene lamellar structures and aggregation of TiO2 nanometer particles in procedures for preparing titanium dioxide and graphene composite materials by the aid of fractional-step methods can be solved; the titanium dioxide/graphene composite nanometer photocatalyst is high in dispersion, has a large specific surface area and is extremely high in photocatalytic degradation capacity for nitrogen-containing organic dyestuff in printing and dyeing wastewater, and accordingly the titanium dioxide/graphene composite nanometer photocatalyst and the method have broad application prospects.

Metallic dry toner particles are prepared by dry blending resin particles with non-conductive metal oxide particles to form a dry blend. This dry blend is melt extruded under low shear conditions to form an extruded composition that is broken up into metallic dry toner particles. Each metallic dry toner particle consists essentially of a polymeric binder phase formed from the resin particles, and the non-conductive metal oxide particles dispersed within the polymeric binder phase. The metallic dry toner particles have a mean volume weighted diameter (D_vol) before fixing of 15 μm to 40 μm, and the non-conductive metal oxide particles are present in an amount of 20 to 50 weight %. The ratio of the metallic dry toner particle D_volto the average equivalent circular diameter (ECD) of the non-conductive metal oxide particles in the metallic dry toner particles is greater than 0.1 and to 10.

The invention relates to a catalyst for producing low carbon olefin from synthesis gas and a use method of the catalyst for producing the low carbon olefin from the synthesis gas. According to the catalyst and the use method, the problems of low CO conversion rate and low carbon olefin selectivity in reaction for preparing low carbon olefin from the synthesis gas in the prior art are mainly solved. The catalyst for producing low carbon olefin from the synthesis gas comprises the following components in percentage by weight: (a) 5%-50% of an iron element or oxides of the iron element, (b) 4%-20% of at least one element selected from manganese and zirconium or oxides of the element, (c) 1%-10% of a bismuth element or oxides of the bismuth element and (d) 25%-90% of a carrier, wherein the carrier comprises the following components in parts by weight: (1) 15-40 parts of alpha-aluminum oxide, (2) 1-45 parts of calcium oxide, (3) 1-5 parts of titanium dioxide and (4) 1-20 parts of potassium oxide. According to the technical scheme, the problems are well solved; the catalyst can be applied to the industrial production for producing low carbon olefin from the synthesis gas by virtue of a fixed bed.

The invention belongs to the technical field of battery materials, and particularly relates to a composite material, a preparation method thereof and a negative electrode. The composite material comprises a carbon active substance core, and an alloyed active substance layer and a shell layer which are coated on the surface of the carbon active substance core, wherein the alloyed active substance layer is positioned between the carbon active substance core and the shell layer. The composite material can realize high-degree uniform dispersion of different active substance phases, so that stressconcentration is effectively relieved, electrolyte can be isolated, side reactions are reduced, and the composite material with a special structure can be used as a negative electrode active materialof a lithium ion battery, so that the cycling stability of the negative electrode active material can be remarkably improved.