261results about How to "High reactivity" patented technology

The application belongs to the technical field of polymer materials, and particularly relates to a high-performance fiber composite material and a preparation method thereof. The preparation method of the high-performance fiber composite material comprises the following steps: adding pretreated aluminum oxide whiskers into a solvent, then adding pretreated carboxymethyl cellulose and gallic acid, and heating to reflux to obtain modified aluminum oxide whiskers; then mixing epoxy resin, the modified aluminum oxide whiskers, a curing agent and an accelerator uniformly to coat a film to obtain a resin adhesive film; and compounding the resin adhesive film and carbon fibers through hot pressing to obtain carbon fiber prepreg, and heating and curing the obtained prepreg to obtain the high-performance fiber composite material. The fiber composite material obtained by the application not only has high strength and rigidity, but also has excellent toughness, can effectively resist the impact of the external environment, has oxidation resistance and long-term stability, and has a wide application prospect in the fields of aerospace and new energy equipment.

The invention discloses a bimetallic asymmetric reduction Schiff base catalyst for synthesizing ethylene carbonate and a preparation method of the bimetallic asymmetric reduction Schiff base catalyst. According to the catalyst, a diamine compound is subjected to selective single-side protection, the imine reduction position is controlled, and a bimetallic active center is introduced; the controllable synthesis of a product for reducing the outer side imine and a product for reducing the inner side imine is realized; the obtained product is recrystallized to obtain a monoimine-monoamine type ligand with a clear asymmetric structure, the monoimine-monoamine type ligand and metal salt form a bimetallic catalyst, and the catalyst generates a synergistic effect through double active sites and shows high catalytic activity and excellent product selectivity.

This invention relates to the field of thermal insulation materials, specifically to an inorganic silicon crystal fire-resistant thermal insulation material for fireproof air ducts and its preparation method. The material comprises inorganic silicon crystal powder, hollow microspheres, composite binders, reinforcing fibers, surface modifiers, nano-antibacterial agents, crack-resistant agents, flame-retardant synergists, and intumescent flame-retardant microcapsules. The inorganic silicon crystal powder is activated by calcination, the microspheres are pretreated with coupling agents and coated with silica sol, the binder is a compound type, the fibers are grafted, the antibacterial agent is loaded onto a carrier, and the flame-retardant microcapsules have a specific core and shell. All components work synergistically to ensure performance. This invention improves the material's fire resistance, thermal insulation, and mechanical properties, integrates antibacterial and flame-retardant functions, optimizes the process to ensure stable performance, reduces fire risk, and meets the high-performance and high-stability requirements of high-end building fireproof air ducts.

This application relates to the field of magnetic material composites, specifically to a high-frequency, low-loss soft magnetic powder and its preparation method. A method for preparing a high-frequency, low-loss soft magnetic powder includes the following steps: aluminum source preparation: urea is added to an aluminum salt solution and mixed to obtain an aluminum source solution; the aluminum salt in the aluminum salt solution includes at least one of aluminum sulfate, aluminum nitrate, and aluminum chloride; reaction coating: soft magnetic powder is added to the aluminum source solution and heated to react, obtaining coated soft magnetic powder; post-treatment: the coated soft magnetic powder is centrifuged, washed, dried, and then annealed to obtain high-frequency, low-loss soft magnetic powder. This application uses a heating reaction between aluminum salt and urea to generate boehmite nanosheets in situ on the surface of the soft magnetic powder. Annealing then eliminates internal stress, stably coating the soft magnetic powder surface with boehmite, thereby forming a large resistance between the conductive metal particles, effectively blocking the eddy current path induced by the high-frequency alternating magnetic field, thus significantly reducing eddy current loss.

This invention belongs to the field of hard carbon technology, specifically relating to a bamboo-based and lignin-based hard carbon composite material, its preparation method, and its applications. The process involves pretreating raw materials to obtain pretreated material; pretreating the pretreated material with an acidic oxidant to obtain acidic oxidant pretreated material; pre-oxidizing the acidic oxidant pretreated material to obtain pre-oxidized material; pre-carbonizing the pre-oxidized material under a protective atmosphere to obtain pre-carbonized material; pulverizing the pre-carbonized material to obtain pulverized material; acid washing followed by water washing to obtain purified material; soaking the purified material in acid, filtering, and drying to obtain soaked material; mixing the soaked material with a modifier, and high-temperature coating and carbonizing under a protective atmosphere to obtain bamboo-based coated hard carbon or lignin-based coated hard carbon. Mixing the two types of hard carbon and carbon coating yields a bamboo-based and lignin-based hard carbon composite material, which is used in negative electrode sheets and batteries. When applied to batteries, the hard carbon composite material of this invention can improve battery energy density.

The application belongs to the technical field of waterborne polyurethane preparation, and particularly relates to a solvent-free photocuring polyurethane and a preparation method thereof, which comprises the following steps: 1) mixing 1,6-hexane diisocyanate trimer, hydroxypropyl acrylate and a polymerization inhibitor at 55-65 DEG C, and obtaining a PUA prepolymer after reaction; 2) mixing the PUA prepolymer, epoxy acrylate resin, hydrogenated rosin glyceride, an active diluent mixture containing a photoinitiator, PETMP, a tertiary amine type co-initiator, a silane coupling agent and a polymerization inhibitor, stirring, defoaming, filtering, and obtaining the solvent-free photocuring polyurethane; the application has the advantages of fast curing speed and high storage stability.

This invention discloses a method for synthesizing cefotiam, using 7-aminocephalosporanic acid (7-ACA) as the parent nucleus and introducing a 4-dimethylaminopyridine-dimethyl carbonate composite catalytic system. The reaction is carried out in a one-pot process involving 3-position nucleophilic substitution, 7-position amidation, and simultaneous deprotection in a green mixed solvent of ionic liquid [BMIM]BF₄-water with 1-(2-dimethylaminoethyl)-1H-5-mercapto-tetrazole and compound I. This method simplifies the process, improves selectivity, produces a high-purity product with stable yield, and is suitable for industrial production.

The application provides a synthesis method of a polymerization inhibitor 706 by using a sulfonated silicon dioxide catalyst, and the synthesis method comprises the following steps: dissolving a polyoxypropylene polyoxyethylene copolymer solution in water, adding concentrated hydrochloric acid and heating to 40 DEG C, adding tetraethyl orthosilicate to the solution, adding 3-mercapto propyl trimethoxysilane and 30wt.% hydrogen peroxide after stirring, continuing to stir, and after the reaction is completed, filtering the solution to obtain a filter cake and a filtrate, mixing the filtrate with the filter cake after treating the filtrate with activated carbon, and obtaining the sulfonated silicon dioxide catalyst through aging, washing, acidification and drying; the sulfonated silicon dioxide catalyst synthesized by the method has the advantages of simple synthesis method, high catalytic reaction activity and high reaction selectivity in the synthesis of the 706 polymerization inhibitor.

The utility model discloses environment-friendly low-alkali cement grinding aid stirring equipment which comprises a stirring machine shell, an inner cavity is fixedly connected in the stirring machine shell, the top end of the inner cavity is in threaded connection with a first rotating shaft, a plurality of push type paddles are fixedly connected to the first rotating shaft in the vertical direction, and the first rotating shaft is in threaded connection with a second rotating shaft in the vertical direction. The top surface of the stirrer shell is fixedly connected with a motor I, and the output end of the motor I is fixedly connected with the rotating shaft I; a second rotating shaft is in threaded connection with the top end of the stirrer shell, a plurality of turbo type paddles are fixedly connected to the second rotating shaft in the vertical direction, a second motor is fixedly connected to the top face of the stirrer shell, and the output end of the second motor is fixedly connected with the second rotating shaft; liquid components are mixed with low shear force in the pre-stirring stage of the push-type paddle, the scrapers synchronously remove attachments on the wall of the cavity, and the turbo-type paddle rapidly crushes solid particles through high shear force and promotes uniform fusion of materials, so that the reaction activity of the grinding aid and the stability of a finished product are remarkably improved.

The invention provides high-naringenin-content modified shaddock peel fiber gel and a preparation method thereof.The preparation method comprises the following steps that after shaddock peel white pulp is subjected to quick freezing and smashing, pretreatment is conducted through an electrochemistry-assisted gradient enzymolysis technology, then customized immobilized naringinase is adopted for treatment, and high-naringenin-content shaddock peel fibers are obtained; and finally, uniformly mixing the fiber with carnosic acid and soybean saponin, and adding magnesium chloride for cross-linking and curing to obtain the modified shaddock peel fiber gel. According to the preparation method, electrochemical assisted gradient enzymolysis is adopted, so that a compact network structure of fibers can be destroyed to increase active sites, the immobilized naringinase not only can efficiently convert naringin and accurately enrich naringenin, but also can effectively improve bitter taste, and magnesium ions regulate and control a multiple cross-linked network formed by the components, so that the gel structure tends to be more stable; meanwhile, naringenin is stably loaded so as to avoid migration and aggregation of the naringenin, and the bioavailability and active efficacy of the naringenin are remarkably improved.

The application provides a metal oxide supported active metal catalyst, a preparation method and application thereof. The metal oxide supported active metal catalyst comprises a metal oxide carrier and active metal particles supported on the metal oxide carrier; the loading amount of the active metal is 0.1wt%-5wt% based on 100% of the mass of the metal oxide carrier. It is tested that the hydrogenation reaction of carbonates to prepare formate by using the metal oxide supported active metal catalyst provided by the application as a hydrogen source or using gaseous carbon monoxide with different concentrations and water to provide in-situ hydrogen source for the water gas shift reaction realizes the hydrogenation reaction of carbonates to prepare formate, the yield of the obtained formate is high, the selectivity is above 99%, there is no attenuation after 6 cycles, and the metal oxide supported active metal catalyst has excellent bifunctional effect. In addition, the preparation method of the metal oxide supported active metal catalyst is simple, the operation condition is mild, and the cost is low, so that large-scale production can be realized.

This invention discloses a long-life pavement material for extreme and complex conditions and its preparation method. Modified asphalt pavement material is prepared using ultra-deeply decrosslinked rubber as the main raw material (with a content greater than 50%). Through specific processes and formulations, this pavement material retains excellent self-healing properties even under extreme low-temperature conditions (< -10 °C), with a healing efficiency greater than 50%, and a healing efficiency greater than 30% after aging, resulting in a long service life. This invention not only solves the problem of easy cracking in asphalt pavements and significantly improves their service life, but also enables the high-value resource utilization of waste rubber, resulting in significant environmental and economic benefits.

A plastic masterbatch is characterized by comprising the following components: linear low-density polyethylene, fluorocarbon-modified talc, polypyrrole-modified talc, a foaming agent, and a dispersant. The invention also discloses a method for preparing the plastic masterbatch. The addition of modified talc significantly improves the conductivity and wear resistance of the plastic masterbatch.

The application discloses a method for producing ethanol by poplar enzymolysis fermentation, and adopts metal chloride and ethanol aqueous solution to pretreat poplar firstly, and then carries out simultaneous saccharification and fermentation to produce ethanol; the metal chloride is aluminum chloride and / or chromium chloride. After the poplar is pretreated by the method, the simultaneous saccharification and fermentation is carried out, when the substrate concentration of the poplar is 30%, the yield of glucose produced by poplar enzymolysis can reach 62.28 g / L; when the substrate concentration of the poplar is 32%, the yield of glucose produced by poplar enzymolysis can reach 64.85 g / L. The method can effectively remove lignin, improve the reaction activity of cellulase, effectively improve the efficiency of poplar enzymolysis fermentation, and improve the yield of ethanol.

The application discloses a coal pyrolysis method and device for realizing in-situ ring-enriching modification of tar, and the method is as follows: block coal is pyrolyzed to obtain coal tar, semi-coke and pyrolysis gas; the coal tar and a ring-enriching modifier are subjected to in-situ ring-enriching modification reaction in a coal pyrolysis device under hydrogen to obtain coal tar; the in-situ ring-enriching modification reaction temperature is 200-250 DEG C, and the reaction pressure is 101-120 KPa.The coal tar obtained by the method is rich in polycyclic aromatic hydrocarbons and is suitable for being used as a processing raw material of high-density fuel.The device introduces the ring-enriching modification reaction on the basis of the coal pyrolysis, so that the coal tar is subjected to in-situ ring-enriching modification in the pyrolysis, and the obtained coal tar is more suitable for being used as the processing raw material of the high-density fuel.The pyrolysis device has the characteristics of low cost and low heat loss.

This invention discloses an organocobalt salt for improving the tensile strength of rubber and its preparation method, belonging to the field of rubber technology. The organocobalt salt for improving the tensile strength of rubber comprises, by mass parts, 140-210 parts of organosilicon vegetable fatty acid, 20-30 parts of solvent, 20-30 parts of cobalt hydroxide, and 10-16 parts of propionic acid. The organosilicon vegetable fatty acid is obtained by reacting rosin with organosilicon maleimide. The organosilicon maleimide is obtained by reacting maleic anhydride with a silicon-containing long-chain fatty amine. The silicon-containing long-chain fatty amine is obtained by reacting methyldiethoxysilane with an unsaturated long-chain fatty amine. The organocobalt salt obtained by this invention has a good effect on promoting the adhesion between metal and rubber while effectively improving the tensile strength of rubber.

The invention relates to a catalyst for preparing anisole through phenol methanol etherification as well as a preparation method and application of the catalyst. The catalyst takes aluminum phosphate as a carrier and is doped with zirconium oxide; on the basis of the mole number of Al, the mole ratio of P to Al is (0.05-2): 1, and the mole ratio of Zr to Al is (0.08-0.20): 1. Dropwise adding the aluminum-zirconium mixed aqueous solution into the phosphorus source aqueous solution, stirring, standing and washing to obtain a solid sample; and drying and roasting the solid sample to obtain the aluminum phosphate catalyst. Under the action of the catalyst, phenol and methanol are catalyzed to generate anisole. Compared with the prior art, the phenol conversion rate is greater than or equal to 50%, the anisole selectivity is greater than or equal to 85%, highly toxic dimethyl sulfate and a large amount of alkali are not needed, the process is green, the cost is low, separation is simple, and the method is suitable for large-scale industrial production of anisole.

This invention relates to the field of polyurethane materials technology, providing a composite foamed polyurethane material and its applications. The composite foamed polyurethane material consists of component A and component B. Component A contains di(hydroxyalkyl)anthraquinone, and component B is a polyisocyanate compound, wherein the polyisocyanate compound contains anthraquinone with a chemically bonded weight percentage of not less than 5%. This invention introduces anthraquinone structures into the foamed polyurethane material through two methods, and simultaneously adds carbon-based materials, which can fully utilize the role of anthraquinone as a redox mediator in promoting denitrification of nitrogenous wastewater, and also exhibits high mechanical strength and durability.

The invention discloses a preparation method of a polypropylene composite filler based on electrocatalytic oxidation coal gasification fine slag as a raw material, the preparation method comprises the steps of raw material treatment, system modification, material electrolytic oxidation and material post-treatment, the polypropylene composite filler comprises polypropylene resin and the polypropylene composite filler, based on the total weight of the composite material, the usage amount of the composite filler is 5-20wt%, and the usage amount of the composite filler is 5-20wt%. The raw materials comprise an environment-friendly functional auxiliary agent accounting for 0.5-5% of the total weight of the composite material, and the functional auxiliary agent is selected from one of a weather-proof agent, a halogen-free flame retardant and a bio-based antibacterial agent. The method has the advantages that the low-temperature plasma pretreatment and the composite modifier assisted electrocatalytic oxidation process are combined, a large number of active sites can be quickly and efficiently introduced on the surface of the coal gasification fine slag through the low-temperature plasma treatment, and the surface energy and the reaction activity of the coal gasification fine slag are remarkably enhanced.

The application belongs to the technical field of polyurethane grouting materials, and discloses a high polymer grouting material capable of being rapidly cured in a low-temperature environment, which is formed by mixing A component and B component, and the content of each component is as follows in terms of weight fraction: A component: 100 parts of polymethylene polyphenyl polyisocyanate; B component: 35 parts of polyether polyol A, 15 parts of polyester polyol B, 5-15 parts of Mannich base, 10 parts of flame retardant, 1.5 parts of foaming catalyst, 0.5 parts of gel catalyst, 0.5 parts of surfactant, 5 parts of physical foaming agent, 1.0 parts of chemical foaming agent and 5 parts of plasticizer. The Mannich base curing agent is added to the B component during preparation of the two-component polyurethane grouting material, and is uniformly mixed with other materials, so that the high polymer grouting material can be rapidly cured in a low-temperature environment.

The application relates to a feeding module and a single-wall carbon nanotube production device, which comprises a mixing cavity, a first feeding mechanism and a second feeding mechanism. The first feeding mechanism comprises a storage device, a powder feeder and a plasma generator. The powder feeder is in communication with the storage device and the plasma generator respectively, and is used for providing the powder-like catalyst stored in the storage device to the plasma generator. The plasma generator can ionize the catalyst conveyed by the powder feeder, and provide the ionized gaseous catalyst to the mixing cavity. The second feeding mechanism comprises an air inlet pipe, which is in communication with the mixing cavity and can simultaneously provide the mixing cavity with carbon source gas and carrier gas. The mixing cavity can mix the ionized catalyst, the carbon source gas and the carrier gas to form a reaction gas. In this way, the carbon source gas and the catalyst can be fully mixed, which is beneficial to improving the yield and quality of the subsequent preparation of single-wall carbon nanotubes.

This invention pertains to compositions of polymeric compounds, specifically a recycled rubber powder modified asphalt based on a renewable composite activator, its preparation method, and its application. The recycled rubber powder modified asphalt comprises a base asphalt and activated rubber powder in a mass ratio of 1:(0.2~0.3). The activated rubber powder comprises waste tire rubber powder and a composite activator in a mass ratio of 10:(0.8~1.5). The composite activator comprises an organic phase and an inorganic phase in a mass ratio of (1.5~3):1. The organic phase is a chitosan-amino acid derivative, and the inorganic phase is a layered bimetallic hydroxide. Compared with existing technologies, the rubber powder modified asphalt prepared by this invention exhibits good high-temperature storage stability and interfacial structural integrity, demonstrating excellent anti-aging properties and high-temperature rutting resistance during long-term service.

The application provides a method for preparing methyl silicone oil by using organic silicon high ring, which directly prepares the methyl silicone oil by using cheap organic silicon high ring, and reduces the production period and cost of the methyl silicone oil. In the application, semi-continuous feeding is adopted, the viscosity of the processed methyl silicone oil is controllable, the molecular weight distribution is narrow, the product conversion rate is greater than 85%, compared with the traditional process, the reaction process is stable, the utilization rate of the end-capping agent is high, and the amount is less.

This invention discloses a method for preparing an electrically pulsed perovskite oxygen evolution reaction (OER) catalyst. The method involves overlapping electrodes on both sides of an SRIO thin film prepared from strontium nitrate, ruthenium oxide, and iridium oxide. Under an argon atmosphere, the SRIO thin film is subjected to a 2-second electrical pulse treatment via an external voltage source, with an electric field strength of 40 V / cm. This invention utilizes ruthenium oxide and iridium oxide powders as ruthenium and iridium sources, making it easier to obtain high-purity SRIO@E catalysts. This provides significant guidance for the synthesis of noble metal-based perovskite materials. Through a simple and easy-to-implement electrical pulse treatment strategy, this invention can remove some oxygen atoms from the catalyst, increasing the number of unpaired electrons available for the catalytic reaction and improving reaction activity. Furthermore, this electrical pulse treatment strategy is simple and controllable, has universal applicability, and is expected to meet the needs of industrial production.

The application discloses an integrated stretchable flexible wearable biosensor and a preparation method thereof, and belongs to the technical field of electrochemical sensing.The integrated stretchable flexible wearable biosensor is wrapped by a PAN / SiO2 sweat absorption layer.The method comprises the following steps: preparing a stretchable conductive composite fiber; preparing an integrated stretchable flexible sensing fiber; preparing a PAN / SiO2 sweat absorption layer; and preparing a sensor.The conductive composite fiber in the application can maintain stable performance under multiple bending and twisting, the sensor is integrated with a flexible integrated circuit chip and a flexible power supply device to obtain a fabric sensing system, the fabric sensing system can process acquired sensor data, and the detection data can be uploaded to a mobile terminal and a cloud end in real time through Bluetooth technology, real-time monitoring and management of a health condition of the biosensor are realized, six specific biomarkers can be efficiently detected by using only 1 muL of sweat, the amount of sweat required for activating the biosensor is 1 / 3 of that of the prior art, and the fabric sensing system can easily adapt to a tensile strain caused by exercise.

The application provides a copper selection process of iron-containing waste residue, and comprises the following steps: adding iron powder and ammonium fluoride into titanium dioxide waste acid to obtain a titanium dioxide waste acid pre-solution after a period of reaction; S2, adding the iron-containing waste residue into the titanium dioxide waste acid pre-solution, and controlling the reaction temperature to be 20-50 DEG C; S3, after the reaction is completed, adding a nano precipitant when the pH of the solution is adjusted to 3-4.5, and adding a modified flocculating agent after a period of reaction, so that the precipitated copper is obtained after filtration and washing.

The application discloses a catalyst for preparing high-level unsaturated aldehyde through hydroxy aldehyde condensation reaction and a preparation method thereof. Specifically relates to a method for preparing propylene aldehyde through hydroxy aldehyde condensation reaction of a mixed solution of formaldehyde and acetaldehyde, in which, a basic metal is loaded on a modified CeO2 carrier; the reaction is carried out in a fixed bed under normal pressure; the catalyst provided by the application is cheap, and the preparation method is simple, efficient, and has the characteristics of high conversion rate of acetaldehyde in the reaction process, the highest conversion rate can reach 95%, and the selectivity of propylene aldehyde can reach 70%.

This invention discloses a compound mineral-plant growth promoter for agricultural soil improvement, its preparation method, and its application. The growth promoter is composed of 30-40 parts tourmaline powder (325-1250 mesh), 20-30 parts hexagonal stone powder, and 30-50 parts maifanite powder, and is activated by high-gradient electromagnetic resonance with a magnetic field gradient >10000 Gauss. This growth promoter integrates physical improvement, chemical conditioning, and biological promotion functions. After application to the soil, it effectively improves soil aggregate structure, bidirectionally regulates pH, and passivates heavy metal ions such as lead, cadmium, and mercury. Simultaneously, it continuously releases negative ions and far-infrared rays and slowly releases trace elements such as silicon, calcium, magnesium, iron, zinc, selenium, and germanium. Field trials show that this growth promoter can restore the pH of acidified soil to neutral, increase crop yield by 10-20%, and reduce heavy metal residues by 40-60%. The raw materials are natural, the process is simple, and it is suitable for improving acidified, saline-alkali, and continuously cropping-impaired soils, and for enhancing crop quality and efficiency.

This application relates to the technical field of waste gas treatment equipment, and discloses a boiler flue gas desulfurization and denitrification treatment device, including a desulfurization and denitrification cylinder. A filter box is fixedly installed on the left side of the desulfurization and denitrification cylinder, a mixing box is fixedly installed on the top of the desulfurization and denitrification cylinder, and a filtrate box is fixedly installed at the bottom of the desulfurization and denitrification cylinder. The same functional box is fixedly installed on the right side of the filtrate box, the right side of the desulfurization and denitrification cylinder, and the right side of the mixing box. The same conveying chamber is fixedly installed on the top of the functional box and the top of the mixing box. A chemical storage tank is fixedly installed on the top of the conveying chamber. An air inlet pipe is provided on the left side of the filter box, an activated carbon adsorption plate is provided inside the filter box, and a spraying mechanism is provided inside the desulfurization and denitrification cylinder. This application has the following advantages and effects: by setting up a conveying mechanism and a stirring mechanism, it can ensure the uniformity of the reagent concentration and improve the reaction activity, and can achieve the uniform addition of the reagent and improve the mixing efficiency.

This invention discloses an alloy catalyst, comprising a support and a copper-ruthenium alloy supported on the support, wherein the copper-ruthenium alloy is: Cu 0.7 Ru 0.3 The alloy catalyst prepared by this invention can be used to prepare cyclopentanone. The catalyst has high activity, good stability, and low price. The reactants used in the reaction are renewable, widely distributed, and inexpensive. The preparation of cyclopentanone using the catalyst of this invention does not require the introduction of acid or alkali, which solves the problem of difficult acid treatment in the prior art. Furthermore, it is not corrosive to the reaction equipment, which is conducive to large-scale production.