94results about How to "Rich porosity" patented technology

The invention discloses a thick electrode with a good electrochemical performance. The electrode comprises a current collector and an electrode membrane containing active substances and conductive substances. With a thickness greater than 300 micrometers, the electrode membrane includes an internal membrane layer close to the current collector and an external membrane layer far from the current collector. The conductivity of the electrode membrane decreases from the internal membrane layer to the external membrane layer, while the porosity of the electrode membrane increases from the internal membrane layer to the external membrane layer. The internal membrane layer has great conductivity which can make electrons at the current collector entering or separating from the internal membrane layer rapidly. With great porosity, the external membrane layer can adsorb a lot of electrolyte, thus solving the problem of poor electrolyte wettability of thick electrodes. In addition, the invention also discloses a preparation method of a thick electrode with a good electrochemical performance.

The invention discloses a surface modified porous carbon structural carbon fiber/sulfur composite cathode material and a preparation method thereof. The composite cathode material is formed by compounding surface modified porous carbon structural carbon fiber and elemental sulfur. The preparation method comprises the steps: firstly, preparing an organic metal frame coated carbon fiber composite by using a solvothermal method; carbonizing the composite at high temperature; and then, compounding the composite with sulfur to obtain the surface modified porous carbon structural carbon fiber/sulfur composite cathode material. The preparation method is simple; the adopted raw materials are low in cost; the prepared composite cathode material has high specific capacity and high utilization ratio of active sulfur; the cycle performance of a lithium sulfur battery is greatly improved.

The invention discloses a methanation catalyst for a fluidized bed and a preparation method of the methanation catalyst for the fluidized bed. The methanation catalyst for the fluidized bed comprises a carrier, an active component and auxiliary agents, and the active component and the auxiliary agents are loaded on the carrier. The carrier is a compound of Al2O3, ZrO2 and NiO or a compound of Al2O3, TiO2 and NiO; the active component is NiO; the auxiliary agents are oxides of at least one of Mg, Ca, La, Ce, Mn, Fe, Cu, Cr and Co. A co-precipitation method is adopted for preparation of the carrier of the catalyst, and uniformity in component distribution is realized; then spray forming is adopted to obtain the micro-spherical catalyst carrier which is high in fluidity and suitable for the fluidized bed. In preparation of the carrier of the catalyst, silicon sol or silicon-aluminum composite sol is added to serve as an adhesive; in a process of quick preparation of the micro-spherical carrier by spray forming, the silicon sol or silicon-aluminum composite sol is dispersed among carrier components, and after high-temperature calcination, the catalyst carrier is high in mechanical strength, abrasion resistance and impact resistance.

The invention relates to a preparation method of a material, specifically to a preparation method of a seawater desalination material based on polyurethane foam. The invention aims to solve the problem of low desalination efficiency of seawater desalination material prepared by utilizing conventional photothermal conversion methods. The preparation method comprises the following steps: 1, preparing an ammonium persulfate solution and an aniline solution; 2, preparing polyaniline powder; 3, preparing a polyaniline solution; 4, preparing a polyvinyl alcohol solution; 5, preparing a crude productof the seawater desalination material based on the polyurethane foam; and 6, carrying out optimization treatment to obtain the seawater desalination material based on the polyurethane foam. The prepared seawater desalination material can fully utilize the pore diameter structure of a polyurethane foam material and the nano-channel of a polyvinyl alcohol gel, effectively reduces latent heat of evaporation of water, and greatly improves sea water desalination efficiency. The seawater desalination material has a high seawater evaporation rate (2.0 kg/m<2>/h) and high desalination efficiency (99.9%), which is increased by 25% compared with traditional photothermal conversion seawater desalination materials.

The invention discloses a preparation method of a tin-silicon-based graphene ball negative electrode material for a lithium ion battery. The preparation method comprises the following steps that (1) asilicon ester monomer is dissolved in an organic solvent and prepared to be a mixed solution A, a dry stannic oxide ball with the diameter being 15-25nm is taken for stand-by application; (2) the mixed solution A and the stannic oxide ball are uniformly mixed at the stoichiometric ratio, the mixture is dried at the temperature of 30-70 DEG C, and a stannic oxide composite material is obtained; (3) the stannic oxide composite material is roasted in a maffle furnace, and a stannic oxide nano ball wrapped with silicon dioxide is obtained; and (4) the stannic oxide nano ball is placed in a tubular atmosphere furnace, the tubular atmosphere furnace is filled with carrier gas and carbon source gas, and the tin-silicon graphene ball wrapped with graphene is prepared by utilizing chemical vapor deposition. The prepared tin-silicon graphene ball is firm, binding problem between graphene and a to-be-wrapped material is avoided, meanwhile, graphene can completely and uniformly wrap SnO2 nano particles, graphene forms a good buffer layer and an electricity conductive network to SnO2, the capacity can reach 600-1500mAh/g, and the coulombic efficiency can reach 80-98%.

A regenerated water-permeable concrete used for sidewalk and low-load pavement is prepared from cement, water, broken stone, regenerated waste concrete or natural sand and stone, flyash, silica gel powder, slag powder, etc through proportional mixing, adding water and stirring. It can be used for paving road. The paved road is first cured in water at 23 +/- 2 deg.C and then naturally. Its advantages are 15-30 % of porosity, high water permeability, high strength and use of waste as raw materials.

The invention discloses a spherical covalent organic framework material, a preparation method and application thereof. The spherical covalent organic framework material is of a hollow or solid spherical structure with the diameter controllable within the range of 500-1500 nanometers. The preparation method of the spherical covalent organic framework material comprises the step that under the condition of being free of a template agent, a polyamino monomer and a polyaldehyde monomer of 9,9'-spirobifluorene are subjected to a reversible Schiff base reaction to form a spherical structure. The method is free of a template, the preparation process is simple and easy to operate, the product yield is high, and the product has good thermal stability. The preparation method can realize controllable structure, and can obtain the spherical covalent organic framework material with a hollow or solid spherical structure. The spherical covalent organic framework material has a large specific surface area and a rich pore structure, is conveniently functionally compounded with other materials, and has a wide application prospect in the fields of gas storage and separation, catalysis, sensing, energy storage and conversion, drug delivery and the like.

The invention discloses a nano-porous copper loaded ultrafine oxide copper nanowire composite material and a preparation method and application thereof. The material is a rod, and comprises an amorphous basal body, nano-porous copper covering the amorphous basal body, and ultrafine copper oxide nanowires loaded on the surface of the nano-porous copper; the amorphous basal body is CuxZryAlz alloy component, wherein x, y and z are atomic percents; x is not bigger than 50 and not smaller than 45, y is not bigger than 50 and not smaller than 45, z is not bigger than 10 and not smaller than 5; x+y+z is 100; the nano-porous copper has the layer thickness of 85-135 microns, the ligament width of 118-138 nm and the aperture size of 30-100 nm; the nanowires are 4-10 microns long and 5-15 nm wide; and every 20-30 nanowires are clustered as one bundle. The copper oxide nanowires are constructed on the nano-scale basal body for the first time. Nanowire copper oxide is tightly combined with the surface of the nano-porous copper metal, so that the prepared material achieves efficient photocatalytic degradation of organic dye.

The invention provides coaly activated carbon. A preparation method of the coaly activated carbon comprises: mixing particulate coal of 20-100 mesh with an inorganic salt to obtain reacted material, adding the reacted material in a pyrolytic pipe, introducing an inert gas into the pyrolytic pipe, heating to 400-600 DEG C, holding the temperature for 1-4 h, continuing to heat to 800-1000 DEG C, stopping introducing the inert gas, replacing with activated gas, holding the temperature for 1-5 h, and cooling in an inert atmosphere to room temperature to obtain the finished product. The coaly activated carbon may act as a special carrier for calcium carbide process vinyl chloride catalysts, and has the advantages of rich porosity, high mesopore ratio, low ash content, high mechanical strength, and good batch performance stability.

The invention discloses a special paper tube adhesive for paper and belongs to the technical field of binding agents. The special paper tube adhesive for the paper is prepared by the following steps:stirring and mixing nano silicon dioxide, a silane coupling agent and an ethanol solution and reacting; then filtering, washing and drying to obtain modified nano silicon dioxide; then carrying out ultrasonic dispersion on the modified nano silicon dioxide and absolute ethyl alcohol to obtain a modified nano silicon dioxide dispersed solution; mixing glass fibers and the modified nano silicon dioxide dispersed solution and immersing; then drying the immersed glass fibers until the weight is constant; mixing the immersed glass fibers and a dopamine solution and immersing; then drying the immersed glass fibers until the weight is constant, so as to obtain modified glass fibers; stirring and mixing polyvinyl alcohol, a cyclodextrin derivative and water; then adding polyvinyl acetate emulsion,cellulase, the glass fibers and polystyrene emulsion, and stirring and mixing to obtain the special paper tube adhesive for the paper. The special paper tube adhesive for the paper, which is preparedby the technical scheme, has the characteristics of excellent bonding performance and has a wider application and development field.

The invention relates to the field of lithium batteries, in particular to a solid-state electrolyte, a lithium battery cell and a lithium battery. The solid-state electrolyte includes an organic metalframe and an electrolyte filling the organic metal frame. The organic metal frame includes one or more of X-MOFs, X-BTTri and X-dobdc, wherein the X includes one or more of Cu, Mg and Zn, the s includes one or more of 5, 177 and 210, and the mass mixing ratio of the electrolyte to the organic frame is between 1:10 and 10:1. The solid-state electrolyte has a stable structure, and has the advantages of electrochemical window above 5V, better viscosity, flexibility, interfacial wettability and interfacial adhesion, high Li ion conductivity, high tolerance, high shear modulus, high Young's modulus and capability of inhibiting the growth of lithium dendrites.

The invention belongs to the technical field of energy storage materials and particularly relates to preparation and application of a nickel-based three-dimensional graphene/manganese dioxide composite material. The preparation method includes steps that foamed nickel serves as a template, an organic carbon source serves as a raw material, graphene grows on the foamed nickel in situ through a chemical vapor deposition method, and nickel-based three-dimensional intercommunicated network structure graphene is prepared; nickel-based three-dimensional intercommunicated network structure graphene is taken as a conductive substrate, in-situ growth of manganese dioxide on a surface of the conductive substrate is performed by utilizing a hydrothermal reaction method to prepare a nickel-based three-dimensional intercommunicated network structure graphene/manganese dioxide composite material in a wet state, washing with the water is performed to be neutral, and freeze drying is performed to obtain the nickel-based three-dimensional intercommunicated network structure graphene/manganese dioxide composite material. The nickel-based three-dimensional graphene/manganese dioxide composite material is used as a working electrode of a supercapacitor.

The invention relates to a nanoporous silver supported porous silver oxide nanorod composite material and a preparation method thereof. The composite material is a bar material, and comprises an amorphous matrix, nanoporous silver covering the amorphous matrix and porous silver oxide nanorods supported on the surface of the nanoporous silver and generated by in-situ oxidation; the amorphous matrixis a CuxZryAgz alloy ingredient, wherein x, y and z are separately an atomic percentage, and value ranges of the x, the y and the z satisfy relationships of 35 <= x <= 45, 35 <= y <= 45, 10 <= z <= 30, and x + y + z=100; the nanoporous silver has a layer thickness of 120-190 [mu]m, a tough band width of 20-120 nm and a pore size of 60-180 nm; and the nanorods gave a diameter of 0.1-1.5 [mu[m anda length of 0.5-12 [mu]m, and a size of nano holes in the nanorods is 10-100 nm. The composite material provided by the invention has a larger specific surface area, and the porous silver oxide nanorods are not easy to fall off, are easy to recycle after being used and can be recycled and reused; and the composite material has unique structural and performance advantages in the field of inorganicbacterium resistance.

The invention provides a carbide slag absorbent and a preparation method thereof. The preparation method comprises the following steps that a, carbide slag with the water content ranging from 5 wt% to40 wt% is subjected to superfine grinding and drying in the air atmosphere of 200 DEG C to 500 DEG C till the water content is smaller than or equal to 3 wt%, and the carbide slag absorbent is obtained; wherein the linear speed of the medium for superfine grinding and drying is 50m/s-150m/s. Compared with the prior art, the preparation method provided by the invention has the advantages that through superfine grinding and drying under specific conditions and parameters, effective components of calcium hydroxide in the carbide slag can be kept in the carbide slag moisture drying process, Meanwhile, the desulfurization activity of the carbide slag is fully excited, so that the high-quality carbide slag absorbent is obtained; the product has the characteristics of high effective calcium hydroxide content, large specific surface area, high pore volume and uniform and small particle size, and the desulfurization performance index of the product is remarkably improved. Experimental resultsshow that the high-quality carbide slag absorbent provided by the invention has the effective calcium hydroxide content of more than or equal to 80wt%, the specific surface area of more than or equalto 18m < 2 >/g, the pore volume of more than or equal to 0.13 cm < 3 >/g, the D50 of less than or equal to 20mu m and the D90 of less than or equal to 70mu m.

The invention discloses a preparation method of a flue gas denitration agent and belongs to the technical field of flue gas treatment. According to the preparation method, limestone powder is used asa raw material, and the limestone and an auxiliary agent are subjected to operations of refrigeration, ball milling, microwave treatment, freezing and drying and the like, and diffusion of nitrogen oxide to a reaction interface in a denitration process can be effectively improved, so that the denitration efficiency is improved. According to the preparation method, steel dreg is activated by adopting ball milling treatment, the size of steel dreg grains are reduced, and physicochemical properties of a crystal structure and a surface are changed, so that the specific surface area of the steel dreg is enlarged, inner energy and surface energy are increased and crystal lattices can be reduced; crystal lattice dislocation and defects are generated, and an amorphous-state structure which is soluble in water is formed on the surface of the steel dreg; the size of the crystal lattices is reduced and the contact area with the water is enlarged, and the activity can be improved; active substances which can participate in hydration in a system can be sufficiently exposed, so that the activity of the steel dreg is improved; and a concentration and fermentation material component is used to improve the denitration effect very well. By adopting the preparation method, the problem that the denitration efficiency of a current common flue gas denitration agent is low is solved.

The invention provides polypyrrole-coated cattail wool-based ultra-light biomass porous foam as well as a preparation method and application thereof. Cattail wool is subjected to alkali treatment, the cattail wool is fixed and does not collapse in water through a cross-linking reaction of tannic acid and polyvinyl alcohol, and the cattail wool is freeze-dried to obtain cattail wool-based ultra-light biomass porous foam; and then, the cattail wool is coated with polypyrrole generated through in-situ polymerization to obtain the polypyrrole-coated cattail wool-based ultra-light biomass porous foam. According to the mode, the prepared cattail wool-based ultra-light biomass porous foam is stable and does not collapse, has consistent graded channels, and promotes effective coating of polypyrrole, so that the salt resistance of the foam is effectively improved, and meanwhile, the photo-thermal conversion efficiency is enhanced; and the polypyrrole-coated cattail wool-based ultra-light biomass porous foam with excellent salt resistance and high energy conversion efficiency is obtained, and is applied to a solar steam generation system as a photo-thermal material.

The invention provides an adsorbent for printing and dyeing wastewater treatment and a preparation method thereof. Polyether sulfone fibers and polyacrylonitrile fibers are mixed to prepare mixed fibers, the mixed fibers are soaked in an aluminum sulfate-magnesium sulfate mixed aqueous solution, freshly prepared polysilicic acid is added, and the mixture is stirred, reacted and aged to obtain theadsorbent. The polyether sulfone fibers are obtained by mixing polyether sulfone resin and tourmaline powder modified by N-(beta-aminoethyl)-gamma-aminopropyltriethoxysilane, melting and spinning. Thepolyacrylonitrile fibers are obtained by performing polymerization by taking acrylonitrile, itaconic acid and methyl methacrylate as raw materials, then performing tetraethylenepentamine modificationand performing wet spinning. The adsorbent disclosed by the invention is rich in pores and large in specific surface area, has a good adsorption treatment effect on printing and dyeing wastewater with complex components, and has a good decolorization effect.

The invention provides a preparation method of a mask interlayer interlayer filter material, comprising the following steps: S1. preparing a fibrillated plant fiber solution; S2. preparing a hydrogelfilm; S3. preparing a fibroin electrolytic spinning film by electrospinning of a spinning solution, and coating both sides of the fibroin electrolytic film with a composite solution prepared in Step S2, and then compounding the hydrogel film on both sides to obtain a composite film; S4. putting the composite film in a freeze-dryer and freeze-drying to obtain a freeze-dried film; and S5. fixing thefreeze-dried film on a receiving plate of an electrospinning machine, and carrying out electrospinning on both sides of the freeze-dried film through the same spinning solution in the Step S3 so as to obtain the mask interlayer interlayer filter material. The mask interlayer interlayer filter material has good adsorption and filtration effects.

The invention discloses a high-porosity polycaprolactone porous microsphere scaffold used for bone tissue regeneration and a preparation method for the high-porosity polycaprolactone porous microsphere scaffold. By taking gelatin as a pore-foaming agent and by taking a multiple emulsion-solvent evaporation method as the basis, polycaprolactone porous microspheres are prepared; pores in surfaces and pores in the high-porosity polycaprolactone porous microspheres communicate with each other; the porosity of the microspheres is 75.28%-90.73%; and the pore size of each pore is 43-217 [mu]m. The polycaprolactone porous microsphere scaffold has high porosity, so that the scaffold can provide more space for growth of bone tissue; meanwhile, space occupied by a polycaprolactone material is also reduced, and the shortcoming of slow degradation of polycaprolactone is remedied; and the porous microspheres have a larger pore size, and are suitable for ingrowth of cells and regeneration of the bonetissue.