34results about How to "Uniform void distribution" patented technology

The invention discloses a flue gas purifying device for a fixed-bed, which is filled with activated carbon fiber. The top part of a shell of the device is provided with an exhaust inlet and the bottompart is provided with an air outlet; the inner cavity of the shell is divided into a diversion section, a purification section and an air collection section from top to bottom; the diversion sectionis provided with a plate rectifier with holes and a diversion plate is arranged on the plate rectifier; and the purification section is provided with an activated carbon fiber filling cell. The upperend and the lower end of a fixed frame of the activated carbon fiber filling cell are provided with two parallel comb plates respectively; upper clamping plates and lower clamping plates are respectively inserted in various comb openings of the upper comb plate and the lower comb plate; sheet-shaped activated carbon fibers are fixed between the upper clamping plates and between the lower clampingplates; and the width of the spacing between the adjacent two activated carbon fibers is between 0.5 mm and 10 mm. In the invention, the activated carbon fiber can be tightly, reliably and fixedly installed in the purifying device for a long time. The device has the advantages of compact structure, high filling efficient of activated carbon fiber, low consumption of a reactor, convenient repair, installation, replacement and reproduction and the like.

The invention discloses a method for preparing porous alumina ceramic by a gel casting method. The method comprises the following steps: adding aluminum isopropoxide into isopropanol, and uniformly stirring to form a dissolving solution; spraying distilled water into the dissolved solution, and carrying out ultrasonic reaction to obtain an emulsion; adding polyvinyl alcohol into distilled water, uniformly stirring, then adding hyaluronic acid and high-substituted hydroxy propyl cellulose, carrying out constant-temperature ultrasonic treatment, and cooling to obtain a gel solution; dropwise adding the gel liquid into the emulsion, carrying out microwave reaction and heating treatment to form a suspended dispersion liquid, and then carrying out distillation treatment to obtain viscous slurry; and transferring the viscous slurry into a grinding mold, slowly heating, carrying out heat preservation treatment, cooling, demolding to obtain a biscuit, and sintering the biscuit to obtain the porous alumina ceramic. According to the preparation method, the defects of the existing aluminum oxide ceramic are overcome, aluminum isopropoxide is used as an aluminum source to form an emulsion of aluminum hydroxide as a precipitate and an aluminum isopropoxide liquid film, and a porous ceramic structure is formed through a gel system, so that the connectivity and the overall firmness of the aluminum oxide ceramic are greatly improved.

The invention discloses porous ceramics. The porous ceramics comprise, by weight, 6-10 parts of yttria, 1-3 parts of alkyl glucoside, 0.5-2 parts of sodium methallyl sulfonate, 2-6 parts of niobium pentoxide, 4-9 parts of antimony trioxide, 16-22 parts of zirconium dioxide, 5-7 parts of zinc oxide, 3-6 parts of polyester fibers, 3.6-7.4 parts of binders, 1-3 parts of triton, 4-9 parts of silicone resin polyether emulsion, 6-9 parts of sodium-potassium feldspar, 8-10 parts of aluminum hydroxide micro-powder, 1.5-3 parts of clay, 10-24 parts of porous ceramsite and 20-36 parts of emery. The porous ceramics have the advantages that gaps are uniformly reserved in the porous ceramics, the porous ceramics are in appropriate shapes, have appropriate sizes and can be used for diversified filter components, and good effects can be realized by the porous ceramics; the porous ceramics are high in mechanical strength.

The invention discloses optical anode slurry for a dye-sensitized solar cell and a preparation method thereof as well as an optical anode of the dye-sensitized solar cell prepared by utilizing the slurry and the dye-sensitized solar cell, wherein titanium dioxide in the slurry for the dye-sensitized solar cell is the mixture of two kinds of nanoscale titanium dioxides with different particle sizes, the mixture is formed by mixing prepared nano titanium dioxide powder with the particle size of 8-16nm and the specific surface area of 90-100m<2> / g, and P25 titanium dioxide powder proportionally,the optical anode prepared from the slurry fully makes use of the respective advantages of the large particles and the small particles, which ensures that the optical anode has higher optical captureefficiency, but also the photosensitized dye absorption amount is improved, the generation rate and conveying capability of photon-generated carriers are intensified, and the recombination process ofthe photon-generated carriers is reduced, thus the photoelectric conversion efficiency of the dye-sensitized solar cell is improved. The optical anode slurry, the preparation method thereof as well as the optical anode and the dye-sensitized solar cell provided by the invention are suitable for the high-efficiency preparation of the dye-sensitized solar cell.

The invention relates to the field of base materials of medical supplies, in particular to a breathable medical adhesive tape base material and a manufacturing method thereof. The manufacturing method of the breathable medical adhesive tape base material comprises the following steps: (1) carrying out mild pulping treatment on wood pulp fibers, increasing degree of beating by 2-8 degrees of SR, mixing the wood pulp fibers with polyester fibers and water-soluble fibers, and adding a wet strength agent in mixed fibers; (2) manufacturing paper by using the mixed fibers through a cylinder paper machine or an inclined wire machine, carrying out enhancement through surface sizing, and drying and reeling to obtain finished products, wherein the mass percents of the wood pulp fibers, the polyester fibers and the water-soluble fibers respectively account for 50-75%, 20-45% and 1-5% of the mass percent of fibers in breathable medical adhesive tape paper, and the sum of the mass percents of the various components is 100%. A manufacturing process of the method is simple, and the prepared medical adhesive tape base material has the characteristics of high strength, good flexibility, high bulk, high breathability, good evenness and easiness in tearing.

The present invention relates to a return pipe heat exchanger which can be used as condenser and evaporator and is applicable to medium / small water cooling air conditioner, water source heat pump, domestic central air conditioner and air source heat pump water heater, etc. Said invention includes the external shell of said heat exchanger and heat-exchanging pipe-return pipe mounted in the external shell. Said invention also provides their concrete structure and its working principle.

The invention discloses a doped carbon fiber net and a preparation method of the doped carbon fiber net. The doped carbon fiber net is in a net-shaped structure formed by integrating carbon fibers, the carbon fiber has a doped element, the number of outermost electrons of the doped element is not 4, the doped carbon fiber net has the advantages of even distribution of gaps, and excellent overall integration property, electrical conductivity, plasticity and toughness, and the amount of the used carbon fibers is reduced greatly while the strength is guaranteed. The preparation method comprises the steps of preparing a polyacrylonitrile nanofiber or a polyacrylonitrile nanofiber membrane, carbonizing to obtain the carbon fiber or a carbon fiber membrane, doping at the high temperature, washing with acid to remove impurities or washing with alkaline to remove impurities, and the like. The preparation method has the advantages of simple preparation process, low cost, high easiness in operation and implementation, and the like, and precious metals and catalysts are not related.

The invention discloses a preparation method of a sandwich-shaped multicellular lamella. The preparation method comprises the following steps: an electrospinning liquid preparation step: adding chitosan and collagen in a trifluoroethanol solution, and stirring to obtain an electrospinning liquid, wherein the mass ratio of the chitosan to the collagen ranges from (1: 4) to (4: 1); an electrostatic spinning step: carrying out high-voltage electrostatic spinning on the electrospinning liquid to obtain a chitosan-collagen electrospinning biomembrane; and a cell-membrane-cell multicellular lamella construction step: respectively adhering two cell lamellas to the two surfaces of the chitosan-collagen electrospinning biomembrane to grow, so as to obtain a cell-membrane-cell multicellular lamella. According to the preparation method disclosed by the invention, the preparation process is simple and controllable; with the electrospinning biomembrane as a support membrane, as the two cell lamellas are adhered to the biomembrane to grow, the proliferation space of cells is enlarged, circulation of nutrients between the two cell lamellas is improved, and the integrity of the cell lamellas in the transfer process is also ensured, thus a simple, convenient and easy operation method is available for clinical multicellular lamella transplantation therapy.

The invention is suitable for the technical field of electronics and provides a preparation method and applications of an electrode plate. The preparation method of the electrode plate comprises the following steps: respectively providing active carbon, a conductive additive, carboxymethylcellulose and a binder; mixing the active carbon, the conductive additive and the carboxymethylcellulose to obtain a first mixture; mixing the binder with water to obtain a second mixture; under an agitating condition, mixing the first mixture with the second mixture, standing the mixtures for 2-8 hours, and drying, pressing and molding the electrode plate. According to the preparation method of the electrode plate, the carboxymethylcellulose (CMC) can enable the mixed size to form stable rubber mass by adding the carboxymethylcellulose, standing and emulsifying the carboxymethylcellulose; layering of the mixed size caused by different specific gravities of each constituent can be prevented; the distribution stability of each constituent in the size is kept, and the flexibility, the tensile strength, the absorbency and the electrical conductivity of the prepared electrode plate are also improved.

The invention discloses a method for preparing a multi-stage nanocomposite material with photodegradable organic toxic gas, which comprises the preparation of porous layered nano-montmorillonite: the montmorillonite is pulverized to an average particle size of 50 to 50 by mechanical pulverization and air flow method. 200nm; preliminary preparation of nanocomposite materials: compound the montmorillonite and titanium-based photocatalyst materials at low temperature to obtain a compound, add the compound to water or alcohol, react at low temperature, and then add nitrogen source or carbon source for reaction , to obtain the primary nanocomposite material; multi-level nanocomposite material modification: after the primary nanocomposite material is cooled down, a modifier is added for modification, and the modifier accounts for the compound / water or alcohol / nitrogen source or carbon source 0.2-2% of the total mass of the system; the modifying agent includes glycerol or triethanolamine.

The invention relates to a preparation method of a wave-transmitting closed-cell beryllium-containing silicon carbide foam ceramic, which belongs to the field of preparation of special functional materials. In the present invention, the beryllium-containing polycarbosilane powder is used as the beryllium-containing silicon carbide foam ceramic precursor, and the polyol, catalyst, etc. are mixed uniformly in a certain proportion, and then isocyanate is added. After fully stirring, it is injected into the mold. After foaming and curing, the finished product is obtained by pre-oxidation treatment and ceramicization treatment. The preparation process of the invention is simple, and the obtained product has good wave transmission, high heat insulation and excellent mechanical properties.

The invention discloses a production process of a noctilucent landscape fender. The production process comprises the following steps: a, preparing pouring slurry; b, performing pouring molding; c, spraying a reflective layer; and d, pouring a surface transparent layer. The noctilucent landscape fender has the advantages that the noctilucent landscape fender has a very good visual effect in the daytime and at night, is very beautiful, has very good wear resistance, and still has relatively high transparency after being worn for a long time, and the noctilucent and reflective effects are not influenced.

The invention discloses hydraulic high-performance concrete, which belongs to the technical field of concrete. The concrete includes the following components: fine aggregate, coarse aggregate, cement, slag, fly ash, silica fume, water reducer, water, ultrafine natural zeolite powder, gypsum, polymer emulsion, glycols Compound, modified lignosulfonate, sheet silicate mineral material, polysiloxane, oxalic acid, styrene-acrylic emulsion, crystalline hydrated magnesium aluminum silicate mineral, superplasticizer, air-entraining agent, steel fiber , tert-butyl peroxy tert-valerate, nano gelatinite, ettringite-lime composite expansion agent; The dosage ratio of expansion agent is (0.4-0.8): (2-4): (0.5-0.8); In the hydraulic high performance concrete of the present invention, the reinforcement system composed of additives is used to improve the frost resistance of the hydraulic high performance concrete.