52results about How to "Small and uniform pore size" patented technology

The invention relates to an electrolytic capacitor paper, in particular to a super electrolytic capacitor paper. The super electrolytic capacitor paper consists of the following components in percentage by weight: 10 to 80 percent of pineapple flax fiber and 20 to 90 percent of tencel papermaking. The super electrolytic capacitor paper has low paper tightness, high strength and small and uniform pore diameter; the capacitor paper is low in consumption due to the low paper tightness, and an internal resistance of a super capacitor is not increased; the capacitor paper is suitable for the processing of the super capacitor due to the high strength; and the super capacitor is small in leakage current due to the small pore diameter, so that the super capacitor paper is suitable for storing energy and is applied to the super capacitor.

The invention discloses a method for preparing nano porous copper by adopting Cu-Zn alloy. The method comprises the following steps of: preparing copper and zinc in a proportion that the copper is 60 weight percent or 70 weight percent or 80 weight percent of the zinc under the protection of nitrogen to obtain alloys by adopting a smelt technology; carrying out Tafel curve testing by taking a 1M NaCl solution as an electrolyte and utilizing a three-electrode method to obtain easies corrosion voltages of different alloys; carrying out water bath at 50-70 DEG C in the 1M NaCl solution under the condition that the volume ratio of corrosive liquid to the alloy volume is (1,000-1,500):1; carrying out electrochemical corrosion on the alloys under the easies corrosion voltages; dropwise adding 1-2ml of concentrated NH3.H2O solution every other 20 minutes to ensure that the electrolyte contains certain complex compounds to promote the reaction; and stopping the reaction until the cathode does not discharge obvious bubbles any more to obtain the nano porous copper. The nano porous copper prepared through the method has the advantages that the aperture is fine and small, the ligament outline is clear, the aperture is 50-200nm, and the ligament width is 70-100nm.

The invention discloses a method for preparing a Pd/CuO composite nanometer porous material by using amorphous alloy. The method comprises: preparing Ti-Cu-Pd amorphous alloy according to the following atomic percent content: 20%-30% of Ti, 40%-65% of Cu, and 5%-20% of Pd; cutting the Ti-Cu-Pd amorphous alloy into a strip with the thickness of 10 mu m-30 mu , the width of 15 mm-20 mm and the length of 1 cm-3 cm; performing ultrasonic processing in anhydrous ethanol for 5 min, cleaning with deionized water, and drying for usage; putting the strip and a hydrochloric acid aqueous solution with the molar ratio of 1.25 M-5 M in an enclosed container for reaction, and controlling the reaction temperature to be 70 DEG C-180 DEG C and the reaction time of 4 h-10 h, flushing the prepared sample after the reaction is finished, and drying, so as to obtain the Pd/CuO composite nanometer porous material. The Pd/CuO composite nanometer porous material has a composite nanometer porous structure with large specific surface area and electrocatalytic activity. The method is low in enforcement cost, simple to operate and short in time consumption, and is efficient and economic.

The invention provides a polyvinyl alcohol-ethylene copolymer honeycomb porous membrane and a preparation method thereof. The preparation method comprises the following steps: firstly, a polyvinyl alcohol-ethylene copolymer is dissolved in a mixed solvent of isopropanol and water in a mass ratio of (1: 2)-(2: 1) to prepare a polyvinyl alcohol-ethylene copolymer solution with the mass fraction of 7%-12%; then, after a polyvinyl alcohol-ethylene copolymer film is prepared through spin coating, heat treatment is conducted at the temperature 1 to 10 DEG C lower than the boiling point of an azeotrope of isopropanol and water, a solvent phase is removed, and a honeycomb-shaped porous film is formed; and finally, annealing treatment is carried out to obtain the polyvinyl alcohol-ethylene copolymer honeycomb porous membrane. The molecular chain of the selected polyvinyl alcohol-ethylene copolymer comprises a hydrophilic polyvinyl alcohol chain segment and a hydrophobic polyethylene chain segment, and the honeycomb porous membrane with uniform distribution, small pore diameter and uniform pore diameter is prepared through multi-stage solvent volatilization by utilizing the difference of solubility and boiling points of isopropanol and water on the polyvinyl alcohol-ethylene copolymer.

The invention discloses three-dimensional reticulated spinel-cordierite porous ceramic with high porosity and a preparation method thereof. Raw materials comprise a polyurethane sponge template, a foam ceramic raw material and a foam body; and the foam ceramic raw material comprises the following components in percentage by weight: 10-20% of nickel metallurgical waste residues, 7-17% of fly ash, 5-10% of kaolin, 8-13% of alumina, 5-10% of waste glass powder, 0.5-2% of carboxymethyl cellulose, 0.5-2% of polyacrylic acid amine and 36-40% of water; and the foam body comprises the following components in percentage by weight: 1-2% of a foaming agent, 0.5-1% of a foam stabilizer and the balance of water. According to the invention, the three-dimensional reticulated spinel-cordierite porous ceramic with high porosity is prepared by a compound pore forming method by using the foaming agent and an organic foam impregnation method, so that compound pore forming is carried out on an existing three-dimensional reticulated structure by using the foaming agent to obtain a porous structure with small and uniform pore diameters, and porosity of the porous ceramic is improved.

The invention provides sound-absorbing ceramsite as well as a preparation method and application thereof, and belongs to the technical field of buildings. The sound-absorbing ceramsite disclosed by the invention has the characteristics of light weight, high strength, small and uniform pore size, low cost and the like; the bulk density is 600-1100 kg/m < 3 >, the roundness and sphericity are both greater than or equal to 0.8, the cylinder compressive strength is 5-10 MPa, the porosity is greater than 40%, the average pore size is 0.1-500 [mu] m, the apparent porosity is 5-65%, and the 1h waterabsorption rate is 5-35%. In the sound-absorbing ceramsite, more than 90% of the raw materials are industrial solid waste or building solid waste, the preparation cost is low, the sound-absorbing ceramsite is excellent in sound-absorbing performance, a high-performance ceramsite sound-absorbing plate or light-weight aggregate high-performance concrete can be manufactured, and an effective way is provided for resource utilization of the industrial solid waste and the building solid waste.

The present invention relates to a titania composite membrane for separating water/alcohol mixtures and a method of preparation thereof, and more particularly to the titania composite membrane and the method of preparation thereof, wherein a surface of a porous support is modified with silica xerogel and γ-alumina sol and titania sol is coated on the modified surface to form a titania surface layer and then the obtained titania surface layer is dried and calcined to optimize performance of separation and promote thermal stability. The titania composite membrane of the present invention has excellent properties such as thermal stability, mechanical strength and good perm-selectivity for water molecule in water/alcohol mixtures due to the hydrophilic property of the titania surface layer, thus being applicable to the membrane for separating water/alcohol mixtures.

The invention belongs to the technical field of building materials, and provides gypsum-based foam concrete and a preparation method of the gypsum-based foam concrete. The concrete comprises the following components in parts by weight: 50-65 parts of gypsum, 22-28 parts of Portland cement, 1-2 parts of sulphoaluminate cement, 1-2 parts of quick lime and/or slaked lime, 13-18 parts of fly ash, 4-8 parts of SiO2 aerogel, 0.2-0.4 part of graphene oxide, 0.2-0.4 part of a water reducing agent, 0.05-0.1 part of a waterproof agent and 0.09-0.2 part of a foaming agent. Each component can play a synergistic role in specific proportions, can significantly improve the water resistance of the gypsum-based foam concrete, and the water absorption rate of the gypsum-based foam concrete is obviously reduced.

The present invention relates to the separator for batteries wherein the non-woven cloth comprising fibers mainly composed of polyolefin type resin is provided with hydrophilic property on the fiber surface at least by sulfuric compound and characterized as follows:

• (a) the ratio of atomic mass of sulfur to atomic mass of carbon (S/C) is 5×10⁻³ to 30×10⁻³
• (b) the tensile strength is not less than 3 kg/cm² and the preparation method of this separator. The present invention also relates to the secondary batteries using this separator.

The invention discloses an AGM partition plate capable of preventing an electrolyte from being layered. The AGM partition plate is prepared from the following raw materials based on percent by weight: 5-10% of polyester fiber, 3-5% of polyethylene oxide, 5-10% of modified bamboo fiber, 10-15% of water-soluble polyvinyl alcohol fiber, 30-35% of high alkali glass fiber with diameter of 0.5-0.7 micrometer with the balance being high alkali glass fiber with diameter of 3-4 micrometers. By the AGM partition plate, a traditional pure glass fiber formula is abandoned, various fibers are creatively adopted and are interwoven in a mixed way to form the AGM partition plate, higher electrolyte absorption quantity, high wettability and high electrolyte maintaining capability are achieved by means of synergistic matching among fibers, the electrolyte is uniform in distribution, high in porosity and uniform in air gap, and has excellent integral performance, the performance of a battery is favorably improved, and the service lifetime of the battery is favorably prolonged.

The invention belongs to the field of porous material preparation, and discloses a porous alumina preparation method which particularly includes the steps: (1) dispensing and mixing boric acid powderand alumina according to a certain proportion; (2) adding an appropriate amount of water into raw materials and further blending and pressing the raw materials into pellets; (3) placing the pellets into a vacuum drying oven for drying; (4) placing the pellets into an induction furnace for high-temperature smelting; (5) performing air cooling on products to reach room temperature after smelting. Compared with a traditional porous alumina preparation method, the porous alumina preparation method has the advantages that a large number of complicated process steps are omitted, production cost andenergy consumption are remarkably reduced, and generated porous alumina is high in purity and free from other impurities and accordingly has better chemical corrosion resistance.

The invention relates to the technical field of automobile parts, in particular to an automobile air conditioner filter with a sealing device. The automobile air conditioner filter with the sealing device comprises a hollow shell, two magnetic suction strips, two elastic sealing pads and a wavy filter element, wherein the two magnetic suction strips are symmetrically arranged on the inner walls of a left side plate and a right side plate of the hollow shell; the two elastic sealing pads are symmetrically arranged on the outer walls of the left side plate and the right side plate of the hollow shell; the wavy filter element is arranged between the two magnetic suction strips; two layers of metal supporting nets matched with the wavy filter element are arranged between the two magnetic suction strips; and the wavy filter element is arranged between the two layers of metal supporting nets in a matched way. The automobile air conditioner filter with the sealing device is simple in structure, reasonable in design and high in sealing property, can eliminate dust and harmful substances which enter an air-conditioning system, sterilize the air, prevent bacterial virus from entering the automobile and reduce disease propagation, and has large effective filtering surface; meanwhile, due to the regeneration characteristic of activated carbon, the service life can be effectively prolonged.

The invention discloses a foamed aluminum sound-absorbing plate capable of effectively reducing urban traffic noises. The foamed aluminum sound-absorbing plate comprises an aluminum plate body, wherein foamed aluminum materials are adhered to the two side surfaces of the aluminum plate body; the foamed aluminum material comprises the following raw materials: aluminum scrap, deionized water, ultrapure water, absolute ethanol, a dispersant, a plasticizer, an adhesive and a foaming agent; the adhesive comprises the following raw materials: starch, polyvinyl alcohol, polyurethane, butyl rubber, vinyl acetate resin and waterborne organosilicone epoxy resin; the foaming agent comprises the following raw materials: azodicarbonamide, sodium hydrogen carbonate, carbon black, n-hexane, trichlorofluoromethane and sodium lauryl sulfate; the foamed aluminum material has the through hole porosity of 98.5-99.8% and the average through hole size of 0.75-0.85mm; the foamed aluminum materials adhered tothe two side surfaces of the aluminum plate body have the thickness of 20-25mm; the foamed aluminum sound-absorbing plate has the sound-absorbing coefficient of 0.88-0.92. The technical problems of nonuniform through pore size, relatively large through hole size and relatively low through hole porosity of the existing foamed aluminum material are solved.

The present invention discloses a high-performance PPS fiber structure and production method and use thereof. The high-performance PPS fiber structure is woven fabric made from PPS fibers in 0.1 to 12 μm cross sectional diameter, and the maximum pore size of the PPS fiber structure is 20 μm or smaller. The PPS fiber structure disclosed in the present invention has the advantages of high gas impermeability and good hydrophilicity, also has the advantages of simple process, low energy consumption and zero environmental pollution, and can be used in diaphragms for electrolytic apparatuses, high-temperature liquid filter materials and insulating materials.

The invention belongs to the technical field of building materials, and particularly relates to a ceramic tile polishing mud and kieselguhr-based microporous thermal insulation material as well as a preparation method thereof. The ceramic tile polishing mud and kieselguhr-based microporous thermal insulation material is prepared from a siliceous component, a calcareous component, a coagulated component, a gas-forming component, a gas-guiding component, a hydrophobic component and water; the siliceous component is prepared from modified ceramic tile polishing mud, kieselguhr and modified fluorogypsum; and the calcareous component is prepared from quicklime and modified carbide slag. According to the thermal insulation material provided by the invention, the waste utilization rate is high, the ceramic tile polishing mud, the fluorgypsum and the carbide slag can be resourcefully utilized, in the product structure, the porosity is high, the aperture is small and uniform, macro holes and micro holes coexist, the heat conductivity coefficient is low, the mechanical property is high, the water absorption rate is low, and therefore, the thermal insulation material can be widely applied tocivil buildings and industrial buildings in thermal insulation.

The invention provides super capacitor paper. The super capacitor paper is composed of the components in percentage by weight: 5-30% of PET fibers, 70-95% of tencel fibers and the balance being a drystrength agent; the dry strength agent accounts for 0.3-1% of the total weight of the PET fibers and the tencel fibers; the weight ratio of PET fiber pulp is 5-30%; if the weight ratio is higher than30%, the tensile strength of a paper sheet is low and cannot meet the requirements of super capacitor processing; when the weight ratio is lower than 5%, the tearing strength and the elongation of thepaper sheet are low, so that the paper sheet is difficult to meet the strength requirement in the assembly process of the super capacitor and has adverse effects on the loss, and part of the fine denier PET fibers can improve the loss performance of the super capacitor.