52results about How to "Dense pores" patented technology

The invention aims at providing a pantoprazole sodium freeze-dried powder injection and comprises pantoprazole sodium and mannitol with the weight ratio of 1: 2 to 5. The invention is simple in formula and little in side effect; products prepared by the method are plump in appearance, good in complex solubility and excellent in quality with the adoption of an advanced freezing and drying process.

The invention provides a clindamycin phosphate freeze-dried powder injection, which is prepared by the steps that: clindamycin phosphate solution is added with NaOH and is freeze-dried, wherein, the weight ratio of clindamycin phosphate to the NaOH is between 12 and 18 to 1, and the preferred weight ratio is 16.5 to 1. The clindamycin phosphate freeze-dried powder injection has simple formula and less auxiliary materials, overcomes side effects due to the fact that the auxiliary materials are excessively added, and ensures that patients are safer for use.

The invention discloses a high-efficient biomass charcoal coated fertilizer and a preparation method thereof. The fertilizer is prepared from the following raw materials by weight: 20 to 35 parts of walnut shells, 8 to 15 parts of bagasse, 12 to 20 parts of moso bamboo, 20 to 26 parts of urea, 80 to 100 parts of a diluted hydrochloric acid solution with a concentration of 1 mol / L, 10 to 15 parts of ammonium humate, 20 to 30 parts of potassium sulfate, 5 to 10 parts of ferrous sulfate, 18 to 25 parts of calcium monohydrogen phosphate, 6 to 10 parts of clay, 6 to 10 parts of zinc chloride, 4 to 5 parts of a binder and a proper amount of water. According to the invention, the walnut shells containing rich lignin, the bagasse and the like are ground into particles with appropriate sizes, and are subjected to high-temperature sealed carbonization so as to obtain a porous activated carbon component, and the porous activated carbon component is combined with polyvinyl alcohol so as to prepare a fertilizer controlled-release coating agent which has excellent controlled-release effect; meanwhile, the obtained granular activated carbon component has the advantages of large sizes, intensive pores, tight structure, insusceptible breakage, durability in use, and higher cost performance; besides, through timely washing with hydrochloric acid, the pores are timely dredged, and more obvious effects are achieved.

The invention discloses high-strength silicon carbide foam ceramic and a one-time pulp hanging carburizing sintering preparation method thereof, and belongs to the technical field of silicon carbide foam ceramic preparation. The method comprises the steps that foamed plastic serves as a template, a one-time pulp hanging carburizing sintering method is adopted, high-char polymer resin, silicon powder, sintering aids and ethyl alcohol are mixed to be prepared into pulp with certain viscosity, the foamed plastic is immersed in the pulp and then taken out, then surplus pulp is removed through a centrifugal method, drying is conducted in the shade, and then pulp hanging is repeated until the needed volume fraction is reached; a foam precursor obtained after pulp hanging is put into a tubular furnace to be subjected to pyrolysis carbonization in a nitrogen or argon atmosphere, a foam ceramic carbon precursor framework formed by pyrolytic carbon, the silicon powder and the sintering aids is obtained, the foam ceramic carbon precursor framework is put in an atmosphere furnace to be sintered, and the high-strength SiC foam ceramic is obtained. Compared with a traditional template method, the method is simple in technology, mild in reaction condition, low in equipment requirement and capable of achieving large-scale production easily.

The invention discloses a boehmite sol type wear-resisting concrete sealing hardening agent. The boehmite sol type wear-resisting concrete sealing hardening agent is prepared from the following components in percentage by weight: 30 percent to 60 percent of boehmite sol, 3 percent to 8 percent of nano particles, 5 percent to 10 percent of a silane coupling agent, 1 percent to 5 percent of wax powder, 0.1 percent to 0.5 percent of a surfactant, 5 percent to 11 percent of ethanol and the balance of de-ionized water, wherein the silane coupling agent is selected from tetraethoxysilane, 3-aminopropyltriethoxy silane, gamma-glycidyloxypropyltrimethoxysilane, gamma-(methacryloxy)propyltrimethoxysilane, bi-(trimethoxysilicylpropyl)amine, bi-(triethoxysilylpropyl)amine, 1,2-bi(trimethoxysilyl)ethane and the like. The invention further discloses a preparation method of the boehmite sol type wear-resisting concrete sealing hardening agent.

The invention relates to an anti-haze screen window and a preparing method thereof. The anti-haze screen window is made of high polymer materials, titanium dioxide nanoparticles and screen window materials through an electrostatic spinning method. The high polymer materials are one or more of polyvinylidene fluoride, poly methyl methacrylate, thermoplastic polyurethane, polyacrylonitrile and polyethylene terephthalate. According to the anti-haze screen window, the spinning efficiency is high, nano-fiber membranes are uniform and are in close fitting with the screen window, holes are dense, ventilation and breathability are achieved, the screen window can be anti-haze, anti-dust, anti-pollen and anti-mosquito, PM2.5 particulate matters are be effectively blocked, the PM2.5 filtering efficiency reaches more than 99%, clean air effective circulation indoor and outdoor is maintained, and exhaust gas pollution of automobile tail gas is effectively solved. The preparing method of the anti-haze screen window is simple, raw materials are easy to obtain, the cost is low, and scale production is easy.

The invention discloses preparation and application of a positive electrode-interlayer integrated membrane electrode material for a lithium-sulfur battery. According to the integrated membrane material provided by the invention, a polyacrylonitrile / carbon nanotube composite membrane solution is subjected to solvent phase conversion and carbonization to form a carbon membrane, and then the surfaceof the carbon membrane is coated with an organic membrane solution to prepare the integrated membrane electrode material of which the surface of a porous carbon membrane is covered with an organic membrane. The integrated membrane material has double functions of a positive electrode and an interlayer, and is beneficial to ion transfer. The organic membrane has a battery diaphragm function, and the carbon membrane can be used as a lithium-sulfur battery positive electrode by loading sulfur; nano-particles can be added into the carbon film to adsorb polysulfide, so that the shuttle effect of the lithium-sulfur battery is relieved, and the cycling stability, the rate capability and the coulombic efficiency of the battery are improved. The lithium-sulfur battery prepared from the integrated membrane electrode material has excellent energy storage performance, the specific capacity is 890mA hg<-1> after circulation for 100 circles under 0.2 C current density, the capacity loss rate of eachcircle is 0.21%, and the coulombic efficiency is close to 100%.

The invention relates to a self-supporting lithium-sulfur battery cathode material and a preparation method and application thereof. The cathode material is prepared from graphene sponge and sulfur particles coated therein. The preparation method comprises the following specific steps: firstly dissolving sodium thiosulfate in dispersion liquid of commercial graphene oxide water, and then slowly dropping diluted hydrochloric acid during a stirring process to precipitate the sulfur particles on the surface of graphene oxide, then adding ascorbic acid, and stirring evenly and then reducing and assembling graphene under hydrothermal conditions to form a graphene / sulfur hydrogel, freeze-drying to obtain graphene / sulfur sponge, and sectioning and pressing to directly obtain the lithium-sulfur battery cathode material. The cathode material has a sponge-like structure, and the presence of macroporous mesopores facilitates the infiltration of an electrolyte and relieves the volume expansion ofsulfur in a charge-discharge process; and meanwhile, the graphene has a strong chemical adsorption effect on polysulfides to suppress the loss of the polysulfides, thus effectively improving the cycleperformance of the battery, and improving the specific capacity of the battery.

The invention relates to the technical field of building materials, and aims at providing a foam concrete nano reinforcing agent. The foam concrete nano reinforcing agent is composed of the following components by the weight percentage: 20-50% of an SiO2 sol, 5-10% of an Al2O3 sol, 5-10% of a silane coupling agent, 1-5% of a wax powder, 0.1-0.5% of a surfactant, and 30-65% of deionized water. When in use, the product can be subjected to hydrolytic polycondensation to form network-like macromolecules, so as to make pores in concrete dense and enhance the hydrophobicity of the foam concrete; the foam concrete surface glossiness and hydrophobicity are improved; and the penetration depth of a sealant in the foam concrete is improved.

The invention discloses a high-speed rail ballastless track concrete roadbed slab crack restoration and maintenance material and preparation and application thereof. The restoration material comprises, by weight, 10-20% of nanosilicon dioxide, 4-5% of sodium metasilicate, 1-2% of sodium hydroxide, 1-2% of a cross-linking agent, 0.5-1.0% of a hardening accelerator, 0.01-0.05% of a surface activating agent, 0.2-0.5% of sodium tripolyphosphate, 0.1-0.3% of sodium sulfate, and the balance deionized water. The restoration material can be rapidly condensed and hardened under the drying environment, and has the advantages of high binding power and high permeability, and is convenient to construct, free of toxicity or pollution and capable of achieving rapid restoration and maintenance for a high-speed rail ballastless track concrete roadbed slab.

The invention discloses an Al2O3 sol type wear-resisting concrete sealing hardening agent. The Al2O3 sol type wear-resisting concrete sealing hardening agent is prepared from, by mass, 30-60% of Al2O3 sol, 5-10% of a silane coupling agent, 1-5% of wax powder, 0.1-0.5% of a surface active agent, 5-15% of ethyl alcohol and the balance deionized water. The grain size of the Al2O3 sol is 10-40 nm, the pH value is 3-5, and the solid content is 20-50%; the silane coupling agent is tetraethoxysilane, 3-amino propyl triethoxy silane, gamma-glyxidyl ether oxygen propyl trimethoxy silane, gamma-(methylacryloyl chloride)propyl trimethoxy silane, bi-triethoxyl silicyl propyl)amine, bi-(triethoxy silicyl propyl)amine, 1,2-bi(triethoxyl silane)ethane and the like. The invention further discloses a preparation method of the Al2O3 sol type wear-resisting concrete sealing hardening agent.

The invention provides a composite activated carbon filter element which comprises the following components in parts by weight: 3-6 parts of activated carbon fiber cloth, 3-9 parts of wood carbon, 25-32 parts of coconut shell activated carbon and 2-3 parts of acrylic glue. Adsorption properties of various carbon materials of the composite activated carbon filter element provided by the invention can supplement one another, so that the adsorption efficiency is greatly improved, and the effective use time is prolonged. Compared with a common activated carbon filter element, the composite activated carbon filter element is relatively large in adsorption specific surface area, relatively dense in structure, relatively rich in porosity, relatively high in strength, not liable to crush and relatively small in dust amount, the adsorption effect is 10 times better than that of the common activated carbon filter element and is 25 times better than that of granular activated carbon, and water purified by using the filter element is relatively pure in taste.

The invention provides a making method of instant succulent frozen dried bean curd. The making method comprises the following steps that dried bean curd is aged after being frozen, and frozen dried bean curd is obtained; the frozen dried bean curd is unfrozen, and porous frozen dried bean curd is obtained after water is removed; the porous frozen dried bean curd is boiled in marinade, and the instant succulent frozen dried bean curd is obtained; the instant succulent frozen dried bean curd is subjected to high-temperature high-pressure sterilization. The dried bean curd is adopted as a raw material, and after the dried bean curd is frozen, aged, unfrozen, dewatered, marinated and subjected to high-temperature high-pressure sterilization to be tasty, the comprehensively and evenly tasty instant succulent frozen dried bean curd with compact holes is obtained. Compared with bean curd, the water content of the dried bean curd is reduced, high toughness is achieved, many small holes are formed after freezing and dewatering, a good structure foundation is provided for fast sauce absorption and flavor development of the frozen dried bean curd through the compact mesh structure, and therefore sauce can be fast and evenly absorbed into the holes of the frozen bean curd. During high-temperature high-pressure sterilization, the sauce absorbed in the holes of the frozen dried bean curd can further penetrate through the frozen dried bean curd, and therefore the taste is more even.

The present invention relates to a method for treating various soft soil stratum ground bases. Said method is characterized by adopting underground deep-layer blasting compaction technique and ground surface shallow-layer vibration ramming technique and making them be combined with high-vacuum well-point dewatering technique so as to implement treatment of soft soil stratum ground base with large area.

The invention discloses a method of utilizing microbial mineralization to treat copper slag to prepare a building material. The method includes following steps: 1), well mixing and stirring the copper slag, steel slag and lime to obtain a composite cementing material, wherein the steel slag is used for reducing bleeding, and the lime is used for providing a calcium source; 2), pouring the composite cementing material into a stirring pot, adding a water solution of microbial powder and sand, stirring well to form a slurry, and vibrating for forming to obtain a test piece; 3), demoulding the test piece to obtain a sample, and maintaining the sample to obtain the building material. The copper slag is used as a main raw material, and microbial mineralization is used as an approach, so that effective utilization of waste like the copper slag is realized; the method is simple in preparation process, low in energy consumption and environment-friendly; the building material prepared by the method has certain mechanical strength, and the mechanical performance of the building material doped with the steel slag is improved obviously when compared with that of building materials made of copper slag only.

The invention provides a folic acid lyophiled powder injection and a preparation method, comprising folic acid and mannitol, which is characterized in that the weight ratio of the folic acid and the mannitol is 1:2.5 to 10. The preparation method has the advantages of simple prescription, little side effect, and plump appearance, good double solubility and fine quality for the prepared product due to the adoption of the advanced freeze drying craft.

The invention belongs to the fields of grouting technology of mines and underground sewage treatment, and provides a cement-based pollutant-blocking grouting material and a preparation method thereof. The cement-based pollutant-blocking grouting material comprises 40-50% of cement, 32-40% of water, 2-5% of calcium oxide, 10-15% of an active filler, 1-2% of gas-forming coated particles, 8-13% of sodium silicate, 1-2% of basalt fibers, 0.5-1% of guar gum, and 0.1-0.5% of sodium dodecyl sulfate, wherein the gas-forming coated particles are aluminum powder particles with kerosene isolating layers, and the active filler is selected from zero-valent iron, magnetite and activated carbon. The material can be used for reinforcing a roadway and inhibiting diffusion of underground pollutants in a mining area at the same time; the material can be injected into potential water passing channels around a mine in advance through a grouting technology; when the material reaches a designated place, dense fine bubbles can be rapidly generated in the material, the whole slurry is rapidly hydrated and expanded, and strength is obtained; and after mining is finished, the level of underground water rises to carry pollutants in a mining area into the underground water, and the material can block migration of the pollutants through a large specific surface area of a porous structure and active substances contained in the material.

The invention relates to a foundation treatment method combining vibration ramming compaction at a shallow layer and blasting compaction at a deep layer with well-point dewatering, which adopts a manner of combining the blasting compaction at the deep layer underground, ground machine vibration or forced ramming shallow-layer compaction and high vacuum well-point dewatering so as to conduct large-area soft soil foundation treatment. The method comprises the steps of: bestrewing the ground surface of the consolidated foundation region with well point pipes and starting a vacuum pump for drainage; pulling out the well point pipes, using a drilling machine for drilling a plurality of blasting holes, placing blasting charges at places of different depths along the interiors of the blasting holes, leading out a blasting fuse, igniting the blasting fuse and detonating the blasting charges inside the blasting holes of deep foundation; arranging a vibration compacting machine or forced ramming equipment on the ground surface of the consolidated foundation region and starting the vibration compacting machine or the forced ramming equipment; and withdrawing the vibration compacting machine or the forced ramming equipment, bestrewing the ground surface of the consolidated foundation region with the well point pipes and starting the vacuum pump for drainage. The method has the characteristics of short construction period, low construction cost, deep treatment depth and the like.

The invention provides high solid content cement slurry and a preparation method thereof and relates to cement slurry used in the cementing project. The invention aims to effectively increase the density of cement slurry, increase the solid content of the cement slurry for cementing and save the weighting agent material. The technical scheme of the invention is that the cement slurry contains the following components according to proportions: oil-well cement, high solid content filtrate reducer for cementing, high solid content dispersant for cementing, expanding agent, defoaming agent, retarder, weighting agent and distilled water. The preparation method of the high solid content cement slurry comprises the following steps: adding retarder in distilled water to form stable and uniform solution which is set to be a component A; mixing oil-well cement, high solid content filtrate reducer for cementing, high solid content dispersant for cementing, expanding agent, defoaming agent, retarder and weighting agent according to the proportions to prepare uniform powder which is set to a component B; and mixing the component A with the component B according to a ratio, preparing slurry according to the air pollution index (API) method to obtain the high solid content cement slurry. The invention is mainly used in the cementing project.

A stable naloxone hydrochloride lyophilized preparation comprises naloxone hydrochloride and mannitol in a weight ratio of 1 : 30 - 200. The lyophilized preparation has a simple formula and fewer side effects, and employs an advanced freeze-drying process. The prepared products have full appearance, good solubility, and excellent quality.

The invention provides a stable naloxone hydrochloride freeze-dry preparation, comprising naloxone hydrochloride and mannitol, wherein the weight ratio of the naloxone hydrochloride to the mannitol is 1:(30-200). The freeze-dry preparation has the advantages of simple formula and fewer side effects; and moreover, by using an advanced freeze-drying process, the prepared product has the advantages of full appearance, good quick solubility and excellent quality.

The invention discloses a preparation method of a waterborne micro porous waterproof and moisture permeable film. The preparation method comprises the following steps that S1, materials are prepared,the raw materials in parts by weight are weighed in proportion: 100 parts of a waterborne polyurethane emulsion, 5-8 parts of methylbenzene, 10-20 parts of ammonium hydroxide, 2-3 parts of a water-proofing agent and 65-70 parts of water; S2, mixing is conducted, the raw materials weighed in step 1 are mixed to obtain a colloidal mixture; S3, coating is conducted, release paper is evenly coated with the mixture; and step 4 is conducted before the mixture is in a solidified state after coating; S4, drying is conducted, the release paper coated with the mixture is sent into an oven for drying, temperatures with at least three levels are set in the oven, the first-level temperature is 78 DEG C to 80 DEG C, the second-level temperature is 100 DEG C to 120 DEG C, and the third-level temperatureis 150 DEG C to 160 DEG C; and S5, stripping is conducted, after drying, the release paper is stripped to obtain the waterborne micro porous waterproof and moisture permeable film. A film product prepared by the preparation method has the functions of moisture permeability and anti water drop, water dropping on the film surface does not expand, and meanwhile the micro porous waterproof and moisture permeable film has excellent elasticity.

The invention relates to the field of building materials, aiming at providing colored antistatic and anticorrosive paint and a using method thereof. The paint is prepared from the following componentsby mass percent: 5-15% of a lithium silicate solution, 0.5-3% of a glucose solution, 3-10% of inorganic toner, 0.6-1% of a surfactant, 5-10% of ethanol, 15-35% of alumina sol, 5-12% of a silver ammonia solution, 0.5-6% of conductive powder, 0.1-0.5% of a brightener, 1.5-4% of a silane coupling agent and the balance of distilled water. The colored antistatic and anticorrosive paint is prepared from water-based materials, is simple and convenient to construct, and can be directly applied to the surface of a terrace in a way of roller coating or spraying for construction; the terrace treated byusing the colored antistatic and anticorrosive paint has the characteristics of being high in hardness, wear resistance and gloss, antistatic, and the like, and is especially excellent in antistatic property; furthermore, a variety of colors are available for adjustment and selection. The surface gloss of the terrace becomes more durable after the terrace is used for a longer time, and the terraceshows waxing luster.

The invention relates to a multifunctional concrete curing agent, as well as a preparation method and application thereof. The curing agent is prepared from the components in percentage by weight: 15to 20 percent of nanosilicon dioxide, 0.5 to 1.2 percent of sodium metasilicate, 0.2 to 0.8 percent of sodium hydroxide, 0.1 to 0.2 percent of polyethylene oxide, 0.05 to 0.15 percent of surface active agent, 0.05 to 0.15 percent of stabilizer, 0.15 to 0.25 percent of sulfate, 0.25 to 0.35 percent of phosphate, and 77.8 to 83.12 percent of deionized water. The multifunctional concrete curing agentis sprayed when a fresh concrete is initially set, so that a maintenance enhancement function is realized. Compared with the prior art, the multifunctional concrete curing agent provided by the invention has the advantages of simple production process, low cost, outstanding protection effect, no toxicity and no pollution; the curing agent function is realized at the beginning of concrete pouring,and the protection agent function is realized after the concrete is hardened, so that the capability of the concrete on resisting various medium corrosion is greatly improved, the service life of theconcrete is prolonged, and the multifunctional concrete curing agent belongs to the environmental-friendly building material.

The invention discloses a full-load flue gas denitration device. The full-load flue gas denitration device comprises an SCR reactor, an ammonia jet system and a denitration control system and is characterized in that the SCR reactor is arranged in a flue gas bypass at the rear of a boiler tail dust remover, a multilayer low-temperature catalyst is arranged in the SCR reactor, the ammonia jet system is arranged at the inlet flue of the SCR reactor and connected with a reducing agent preparation system, and the denitration control system is connected with each equipment of the flue gas denitration device and used for performing parameter monitoring and operation control on each equipment. The full-load flue gas denitration device has the advantages that original boiler dust remover outlet flue gas is guided into the ultralow-temperature SCR device, the treated flue gas returns to a boiler smoke discharge system, a reducing agent is sprayed into the ultralow-temperature SCR device to satisfy the requirements of project emission and safety production, and the control system is used for effectively monitoring and controlling the operation parameters of the denitration device and the operation conditions of the equipment.

The invention discloses a preparation method of a temperature-sensitive gel type medical dressing based on fabric, which comprises the following steps: S1, dissolving chitosan in a hydrochloric acid solution, and stirring to obtain a chitosan solution; dissolving sodium glycerophosphate in deionized water, and adding the solution into the chitosan solution to obtain a chitosan / sodium glycerophosphate solution; s2, dissolving genipin in an ethanol solution, and adding the chitosan / sodium glycerophosphate solution to obtain a genipin modified chitosan temperature-sensitive gel solution; and S3, dissolving an acetaminophen drug in the genipin modified chitosan temperature-sensitive gel solution, dipping the fabric in the drug-loaded gel solution until the gel solution is uniformly dispersed inside and outside the fabric, sealing the fabric dipped with the gel solution in a container, and putting the fabric in a target temperature environment for gelation, the temperature-sensitive gel is subjected to cross-linking modification, the characteristic of solution-gel transformation of the temperature-sensitive gel is utilized, the fabric is conveniently, quickly and uniformly finished, and the temperature-sensitive gel has the potential of large-scale preparation.

The invention belongs to the technical field of bearing zero machining, and particularly relates to a powder metallurgy brass bearing retainer and a preparation process thereof. The powder metallurgy brass bearing retainer is prepared from the following raw materials: 70-73% of iron powder, 0.7-1.0% of carbon, 20-25% of copper powder, 2.5-3% of nickel powder and 0.6-0.8% of a lubricant. The powder metallurgy brass bearing retainer is made of iron, copper, nickel and carbon, due to the fact that the copper, the nickel and the carbon are added, the powder metallurgy brass bearing retainer has the characteristics of being compact in hole, high in oil content, large in bearing capacity, low in noise and the like, the machining efficiency of the brass bearing retainer can be effectively improved through the brand new machining technology, and meanwhile, a vibration grinding machine is adopted for grinding and deburring, on one hand, burrs on the surfaces of parts can be effectively removed, meanwhile, the internal stress of the parts can be eliminated in the vibration collision process, meanwhile, anti-rust oil is added in the vibration grinding process, the anti-rust technology for the parts is simplified, and follow-up packaging is facilitated.