61results about How to "Reduce reactivity" patented technology

The invention provides aluminum-doped hematite, a preparation method of the aluminum-doped hematite and application of the aluminum-doped hematite in catalyzing peroxides to degrade organic pollutants or remove pathogenic bacteria. The preparation method of the aluminum-doped hematite comprises the following steps: adding ferric iron salt and aluminum salt into deionized water, reacting, precipitating to separate out a product, washing, drying and grinding to obtain a precursor; calcining the precursor, and then washing and drying to obtain the aluminum-doped hematite. The preparation method is simple, cheap and easily available in raw materials, low in cost, green, safe and environment-friendly; the aluminum element is introduced into the hematite, so that the catalytic activity of the hematite is improved, and the catalytic condition is easy to realize; the aluminum-doped hematite disclosed by the invention has excellent capability of activating peroxide, so that the aluminum-doped hematite shows excellent performance in the aspects of removing environmental organic pollutants and sterilizing.

The invention provides an antioxidant graphite material and a preparation method thereof. The preparation method of the anti-oxidation graphite material comprises the following steps: mixing an ester compound containing a boron element with a binder coal pitch, heating and kneading the mixture and coke aggregate (pitch coke or petroleum coke) to form a pasty material, cooling the pasty material, preparing pressed powder, performing isostatic compaction, roasting and graphitizing to obtain the anti-oxidation graphite material. The whole technical route is the same as a large-scale graphite production process of an enterprise and can be directly combined with an existing production process, and the aim of improving the graphitization degree so as to improve the oxidation resistance of the graphite can be achieved without increasing procedures and production cost. Boron and boron in the boron-containing solvent can be distributed in the bulk phase of graphite and reduce the number and reaction activity of carbon active sites, so that the boron-containing solvent is an intrinsic oxidation inhibitor, and the inhibition effect of the bulk phase cannot be affected even if surface loss is caused by abrasion or corrosion.

The invention relates to the technical field of organic silicon resin preparation, in particular to trapezoidal methyl silicon resin and a preparation method thereof.The trapezoidal methyl silicon resin is prepared by taking methyl trichlorosilane as a main raw material, introducing a trapezoidal control agent containing amido and alkoxy at the same time to inhibit the reaction activity of the methyl trichlorosilane and then carrying out hydrolysis reaction in a small amount of alcohol solvent and water; the generation of a cross-linked network structure insoluble substance during hydrolysis is avoided, and the resin gelation risk is effectively reduced. The hydrolysis rate is reduced, so that the use amount of the solvent is reduced, the proportion of alcohol in the water phase is greatly reduced, and the process and environmental protection cost is reduced. The trapezoidal methyl silicone resin prepared by the method is excellent in viscosity performance, high in yield, excellent in boiling resistance, short in curing time, high in resin softening point and short in gelation time.

The invention provides a resin composition, and a prepreg, a laminated board and a metal foil-clad laminated board containing the same. The resin composition comprises the following components in parts by mass: 20-90 parts of a component A and 5-60 parts of a component B, the component A comprises addition reactants of a maleimide compound a1 containing at least two N-substituted maleimide groups in one molecule and an amine compound a2 containing at least two primary amino groups in one molecule; and the component B is benzocyclobutene resin. Through design and mutual compounding of the component A and the component B, the problem of phase splitting caused by insufficient compatibility of a maleimide compound and low-polarity resin is solved, and the warping degree of a laminated board and a metal foil-clad laminated board at room temperature and after reflow soldering is further reduced; the resin composition and the laminated board and the metal foil-clad laminated board comprising the same have excellent performances such as high glass transition temperature and low thermal expansion coefficient, and fully meet the performance requirements of high-speed packaging substrate materials.

The invention relates to the field of batteries, in particular to an electrolyte and an electrochemical device. The electrolyte comprises an organic solvent, an electrolyte and an electrolyte additive, and the electrolyte additive comprises a nitrile additive A and a nitrile additive B; the nitrile additive A comprises at least one of acetonitrile or butanedinitrile; the nitrile additive B comprises at least one of compounds shown as a formula I, # imgabs0, and R1 and R2 are independently and optionally selected from hydrogen, a straight chain or branched chain cyano group with the carbon atom number of 1-10, a straight chain or branched chain alkoxy group with the carbon atom number of 1-10, and a straight chain or branched chain halogenated hydrocarbon with the carbon atom number of 1-5. By combining the nitrile additive A and the nitrile additive B, the high-temperature storage performance and the cycle performance of the battery can be effectively improved at the same time.

The invention belongs to the technical field of batteries, and discloses a high-nickel oxide positive electrode material with a two-phase symbiotic structure and a preparation method, the unique two-phase symbiotic structure can effectively inhibit the violent change of the unit cell volume in the charging and discharging process, and the mechanical stability of the material is improved; a spinel structure is controllably constructed in advance, so that the reaction activity of the material can be effectively reduced, and the thermodynamic stability is improved, thereby inhibiting uncontrollable interface side reaction, oxygen release and irreversible phase change; due to the nanocrystallized particle morphology, faster lithium ion transmission can be realized, and the rate capability of the material is improved; the one-step spray pyrolysis method has the advantages of simple process, rapid reaction, no need of complex steps of coprecipitation, filtration, washing, crushing, calcination and the like, no generation of wastewater, great improvement of the production efficiency and reduction of the cost.

The invention relates to a positive pole piece and a preparation method thereof, and a secondary battery comprising the positive pole piece. The positive pole piece comprises a positive current collector; the positive electrode material layer is arranged on the surface of the positive electrode current collector, the positive electrode material layer comprises a positive electrode active material and a functional polymer shown in the formula (1) # imgabs0 #, and n is equal to 10-10000. The functional polymer captures active oxygen released from the positive electrode under a high-temperature condition, so that the reaction activity of the full-electricity positive electrode and the electrolyte is reduced, the heat release power and heat release amount of the full-electricity positive electrode material and the electrolyte are greatly reduced, and the safety of the battery is improved.

This application relates to the field of hydrosilylation, and in particular to a highly efficient catalyst for hydrosilylation reactions and its preparation method. This application provides a method for preparing a microcapsule-form catalyst, which first modifies methyl-terminated hydroxyl silicone oil with silazane, and then forms a microcapsule coating system with paraffin, thereby improving the release performance of the microcapsule coating system, so that the catalyst has low reactivity in the early stage of release, thereby improving the uniformity of the reaction process inside the silicone rubber, and thus improving the transparency and overall strength of the silicone rubber.

The utility model discloses a multifunctional restraining glove which comprises a glove body, a restraining belt, a grip ball and a tightening device, the glove body is integrally connected with finger separating sleeves of four fingers, a hole is formed in the position, corresponding to the ring finger, of the glove body, the end of each finger separating sleeve is open, and a groove is formed in the position, corresponding to the hand back, of the glove body. A grip ball is sewn and connected to the position, corresponding to the palm center, of the glove body, and an elastic rope is sewn between the side, facing the grip ball, of each finger separating sleeve and the grip ball. A finger ring is fixedly arranged at the end of each finger separating sleeve in a sleeved mode, a guide pipe is fixed to the bottom of the grip ball, four pulling ropes with different lengths penetrate through the guide pipe, one end of each pulling rope is fixed to one finger ring, the other ends of the four pulling ropes are movably fixed to a tightening device, and the tightening device is fixed to a binding belt. The glove has the advantages that the elastic rope of the glove body limits the moving space from fingers to the grip ball, so that the fingers are prevented from moving randomly while moving and exercising of the fingers are facilitated, and an infusion tube is prevented from being struggled off.

This invention discloses an acid and alkali resistant polyamide membrane and its preparation method. The method is as follows: S1: Immerse the ultrafiltration base membrane in an aqueous sodium hydroxide solution for soaking and then set aside; S2: Treat the base membrane with a mixed aqueous solution of polyamine and aziridine crosslinking agent; S3: Wet the base membrane in an organic phase solution of polyacrylamide monomer to obtain a polyamide composite membrane; S4: Immerse the prepared polyamide composite membrane in an alcoholic solution of hydroxymethyl crosslinking agent, then dry it in a forced-air drying oven, and after washing with water, obtain the acid and alkali resistant polyamide membrane. This application uses two crosslinking agents, aziridine and hydroxymethyl, which can undergo specific crosslinking reactions with the carboxyl groups inside the polyamide membrane, to directly perform dual crosslinking modification on the membrane interior and surface, without introducing other polymer materials to avoid excessive increase in membrane permeation resistance. The polyamide membrane prepared by this method has both good acid and alkali resistance and water permeability.

The invention relates to a siloxane-based amide secondary amine chain extender as well as a preparation method and application thereof, and the siloxane-based amide secondary amine chain extender disclosed by the invention can be used together with isocyanate and biodegradable polyester polyol to prepare degradable polyurethane related products. Due to the special design of the structure of the chain extender, the chain extender can be used as a slow-release latent curing agent. The excellent post-curing effect can be realized while the sufficient operability of the system is ensured, and the forming effect and the mechanical property of the single-component polyurethane product are improved. Meanwhile, degradable groups are contained in the product, so that degradation reaction can be carried out as a system hard segment in the degradation reaction process of the product. The degradation degree of the product is obviously improved. The product can be applied to the fields of polyurethane composite materials, coatings, adhesives and the like.

This invention discloses a method for microwave-catalyzed dehydrogenation of naphtha to produce aromatics, specifically comprising the following steps: Step 1, oxidizing and etching the surfaces of four different diameter carbon fibers to obtain four modified carbon fibers; Step 2, preparing four platinum-carbon fibers of different diameters based on the four modified carbon fibers obtained in Step 1; Step 3, preparing a gradient-pore structured platinum-carbon fiber paper based on the four different diameter platinum-carbon fibers obtained in Step 2; Step 4, using the gradient-pore structured platinum-carbon fiber paper obtained in Step 3 to catalyze the dehydrogenation of naphtha to obtain aromatics. This invention uses microwave-assisted catalysis to lower the reaction temperature, achieving localized catalytic heating to reduce side reactions, and also achieves high dehydrogenation efficiency.

The invention relates to the field of hydrosilylation, in particular to a high-efficiency catalyst for hydrosilylation and a preparation method thereof, and provides a preparation method of a microcapsule type catalyst, methyl-terminated hydroxyl silicone oil is modified by silazane, and then a microcapsule coating system is formed by the modified methyl-terminated hydroxyl silicone oil and paraffin. The release performance of a microcapsule coating system is improved, so that the catalyst has relatively low reaction activity at the initial release stage, the uniformity of the reaction process in the silicone rubber is improved, and the transparency and the overall strength of the silicone rubber are further improved.

The application discloses a kind of corrosion-resistant anti-aging plastic packaging barrels and preparation method thereof, belong to plastic product processing technical field, to solve the technical problems that corrosion resistance and anti-aging performance of plastic packaging barrel in prior art need to be further improved, specifically including the following raw material composition by portion: 60-70 parts modified silicone, 3-5 parts modified aging-resistant filler, 8-12 parts polypropylene, 12-18 parts maleic anhydride grafted polypropylene and 3-5 parts auxiliary additive, the application is that polypropylene, maleic anhydride grafted polypropylene, modified silicone, modified aging-resistant filler and auxiliary additive are added into double-screw melt extruder, melt extrusion, injection mold, obtain plastic packaging barrel, not only improve its corrosion resistance and anti-aging performance, also improve its mechanical properties.

The application provides an aluminum-doped hematite, a preparation method thereof and application of the aluminum-doped hematite in catalyzing degradation of organic pollutants by peroxide or removal of pathogenic bacteria. The preparation method of the aluminum-doped hematite comprises the following steps: adding a ferric salt and an aluminum salt into deionized water, precipitating the product after reaction, and then washing, drying and grinding the product to obtain a precursor; and then calcining the precursor, and then washing and drying the aluminum-doped hematite. The preparation method is simple, raw materials are cheap and easy to obtain, the cost is low, and the method is green, safe and environmentally friendly. The catalytic activity of the hematite is improved by introducing aluminum elements into the hematite, and the catalytic conditions are easy to realize. The aluminum-doped hematite has excellent ability of activating peroxide, and thus has excellent performance in removing environmental organic pollutants and sterilization.

The invention discloses a two-dimensional transition metal sulfide nanosheet and a preparation method thereof. According to the two-dimensional transition metal sulfide and the preparation method thereof, a sulfur source and a transition metal source are used as preparation raw materials to perform chemical vapor deposition reaction on a substrate to grow the two-dimensional transition metal sulfide; the sulfur source is sulfurized polyacrylonitrile subjected to discharge treatment, the transition metal source is one of molybdenum trioxide, tungsten trioxide or manganese dioxide, and the carrier gas is argon or nitrogen. According to the preparation method provided by the invention, the two-dimensional transition metal sulfide nanosheet with low defect density, high crystal quality and excellent optical performance can be obtained, and the preparation method has a wide application prospect in the fields of high-performance electronic devices and the like.

The invention relates to the field of dyeing and finishing of bio-based fabrics by bio-based dyes, in particular to a method for dyeing polylactic acid / cotton blended fabrics, which comprises the following steps: mixing visible blue, sodium hydrosulfite, sodium carbonate, caustic soda and water, fully reducing and diluting to obtain visible blue dyeing liquid, adjusting the pH value to be acidic, then mixing with a dispersing agent and an accelerating agent, and uniformly stirring to obtain the polylactic acid / cotton blended fabrics. Immersing the polylactic acid / cotton blended fabric for dyeing treatment, and then performing color development treatment, soaping treatment and color fixation treatment. Aiming at the problem that the polylactic acid / cotton blended fabric is difficult to dye at present, the dyeing method for the polylactic acid / cotton blended fabric is provided, the microbial-sourced ornamental blue is selected as a dye, and the dyeing method has the advantages of being green, environmentally friendly and easy to combine with the polylactic acid / cotton blended fabric; meanwhile, according to the dyeing process, on one hand, the using amount of sodium hydrosulfite is reduced, so that pollution to the environment is reduced, and on the other hand, the dyeing temperature and time are reduced, the energy consumption is reduced, and the dyeing efficiency is improved.

This invention discloses a heterocyclic polyarylamide-polyhydroxyarylamide precipitated fiber, its preparation method, and a heterocyclic polyarylamide-polybenzodioxazole paper, belonging to the technical field of high-performance organic fiber and paper preparation. The preparation method of the precipitated fiber includes the following steps: A. Preparation of the polymerization solution: 3,3'-dihydroxybenzyl diamine (DHB) and 2-(4-aminophenyl)-5-aminobenzimidazole (DAPBI) are dissolved in an organic solvent containing a solubilizing salt, and then terephthaloyl chloride is added to react and obtain a polymer solution with a solid content of 1-10%; B. Precipitation: After degassing, filtering, metering, and spinning, the polymer solution is mixed with a coagulation bath and precipitated to obtain the heterocyclic polyarylamide-polyhydroxyarylamide precipitated fiber. A heterocyclic polyarylamide-polybenzodioxazole paper prepared from this precipitated fiber is also provided. This invention introduces a heterocyclic polyaromatic amide structure through copolymerization, which not only improves the strength and composite properties of the cyclized PBO paper, but also maintains a decomposition temperature comparable to that of pure PBO fiber, exceeding 600℃, demonstrating excellent thermal stability. Furthermore, this method is simple and easy to implement, making it suitable for industrial production applications.

This invention belongs to the field of heterocyclic pharmaceutical intermediate synthesis technology, specifically disclosing a method for synthesizing N-alkoxycarbonyl-4-amino-4-alkylpiperidine. Using N-alkoxycarbonylpiperidine-4-carboxylate as the starting material, the target product is obtained through a four-step reaction involving alkylation, hydrolysis, amidation, and Hoffmann rearrangement. This invention, through the adaptation and control of the substrate, synthetic route, and synthetic conditions, can solve the problems existing in the substrate-based synthetic route, thereby improving product yield and quality. The method described in this invention achieves a total yield of ≥60% of the target product, with key impurities all <0.1%. The process is safe and controllable, suitable for both laboratory-scale and industrial-scale production.

The application belongs to the field of ceramic powder preparation, and discloses a method for in-situ preparation of high-performance TiB2-B4C composite ceramic from sapphire fine grinding waste. The method uses the waste produced in the sapphire grinding process as raw material (B4C, Al2O3 and Fe), adds TiO2 and C after alkali washing and purification, and combines with the discharge plasma sintering to in-situ prepare TiB2-B4C composite ceramic. The method not only realizes the comprehensive recovery of B4C in the sapphire fine grinding waste slurry, reduces environmental pollution, but also provides a method for in-situ preparation of TiB2-B4C composite ceramic from waste, changes waste into treasure, and realizes the secondary use of resources. In addition, the raw material cost is low, and the method has obvious economic value and environmental protection significance. The method has the advantages of short process, small pollution, simplicity and the like, and can be used for industrial production.

The invention designs an ammonia hydrogen rotor machine based on passive pre-combustion chamber jet ignition and a control method, belongs to the field of internal combustion engines, and particularly relates to an ammonia gas storage tank connected with an ammonia nozzle through an ammonia gas pressure reducing valve, a hydrogen storage tank connected with the ammonia nozzle through a hydrogen pressure reducing valve, and an ammonia hydrogen nozzle arranged in a gas inlet channel. A jet flow spraying hole is formed in the passive pre-combustion chamber and communicates with the main combustion chamber, and the spark plug is arranged in the passive pre-combustion chamber to ignite the ammonia-hydrogen-air mixed gas. By means of cooperative control over the ammonia-hydrogen fuel proportion, regulation and control over the reaction activity of mixed gas in a cylinder are achieved, abnormal combustion is inhibited through the low reaction activity of ammonia, and therefore the power density of a rotor machine is improved; the passive pre-combustion chamber is arranged and jet ignition is combined, so that the ignition stability of low-temperature mixed gas is guaranteed, the turbulent combustion process is accelerated, and the combustion stability and heat efficiency of the rotor machine are improved.

The invention discloses a preparation method and application of a lithium-sulfur battery catalyst. The method utilizes the spatial confinement effect of three-dimensional porous graphene and forms a local micro-electric field in situ based on the ferroelectric piezoelectric effect of Nb-N-C during the charge and discharge process, thereby accelerating the catalyst to convert soluble LiPSs into insoluble discharge product Li2S, thereby achieving rapid and complete catalytic conversion of LiPSs and significantly improving the rate performance and cycle stability of the lithium-sulfur battery. Therefore, the prepared lithium-sulfur battery catalyst can be used to prepare lithium-sulfur battery positive electrode materials and further assembled into a lithium-sulfur battery.

The present application relates to the field of new curing agent, specifically relates to a kind of preparation method and application of enol-terminated mercapto compound, the enol-terminated mercapto compound is obtained by enol and mercapto compound mixed reaction, the molar ratio of hydroxyl and mercapto of enol and mercapto compound is (0.01-0.75):1;Specific application, enol-terminated mercapto compound is mixed with polyurethane acrylate, diluent monomer, photoinitiator, polymerization inhibitor to obtain UV glue, the UV glue prepared by enol-terminated mercapto compound, 80 ℃ storage time >80d, light solidification time <120s, and without affecting the curing condition, can greatly improve the shelf life of UV glue.

The application discloses a composite diaphragm for lithium ion batteries, a preparation method of the composite diaphragm and a lithium ion battery. The composite diaphragm comprises a porous base diaphragm, a first microcapsule coating layer coated on a first surface of the porous base diaphragm and a second microcapsule coating layer coated on a second surface of the porous base diaphragm. The first microcapsule is composed of a lithium source compound core material and a polymer wall material coated outside the lithium source compound core material, and the second microcapsule is composed of a lithium-poor active material core material and a polymer wall material coated outside the lithium-poor active material core material. The softening temperature of the polymer wall material is in the range of 90 DEG C to 230 DEG C. When the temperature of the battery reaches a set trigger temperature, the lithium source compound on the first surface side releases lithium to be inserted into a delithiated positive electrode to reduce the positive electrode potential, and the lithium-poor active material on the second surface side releases lithium to be inserted into a lithium-inserted negative electrode to increase the negative electrode potential, so that the battery state of charge is reduced, and chemical intervention is completed before thermal runaway.

The application discloses a self-repairing fast-ion conductor lithium metal negative electrode and a preparation method thereof, and relates to the technical field of lithium ion batteries. The self-repairing fast-ion conductor lithium metal negative electrode comprises a lithium metal layer and a man-made SEI film covering the upper surface of the lithium metal layer; the man-made SEI film is a mixture of a carbon skeleton and a loaded active component, the active component comprises nanoeutectic alloy particles and cuprous nitride; and the mass ratio of the nanoeutectic alloy particles and the cuprous nitride is 1:(1-3). The product can effectively solve the expansion and pulverization problems of the negative electrode active material by constructing a composite man-made SEI film on the lithium metal, and can significantly improve the safety, stability and electrochemical stability of the negative electrode in application.

The application discloses a method for preparing battery-grade ferrous oxalate from lithium extraction residue of lithium iron phosphate, and belongs to the technical field of lithium iron phosphate recycling. The method comprises the following steps: acid leaching of lithium extraction residue of lithium iron phosphate, impurity removal and purification of iron-phosphorus solution, pre-regulation of phosphorus form, directional coordination synthesis of ferrous oxalate, graded washing and phosphorus solidification, crystal form stabilization and drying. The application realizes pre-regulation of the phosphorus form, adds a complexing agent into the purified iron-phosphorus solution, forms stable phosphorus complexes with the complexing agent and free HPO4 2‑ , reduces the reactivity of the complexes with Fe 2+ , and inhibits the generation of FeHPO4 impurities from the source. The application realizes preferential coordination of oxalate and Fe 2+ through directional coordination synthesis, realizes deep removal of residual phosphorus through graded washing, and prevents adsorption of phosphorus elements in the process of crystal form transformation through crystal form stabilization.

The present application relates to the technical field of epoxy resin adhesive, in particular to a long applicable period dual-curing interpenetrating network type one-component epoxy resin adhesive, a preparation method and application, the adhesive is composed of 100 parts of E-51 epoxy resin, 15-35 parts of modified imidazole curing agent, 10-40 parts of active diluent, 0.2-2.0 parts of free radical polymerization initiator by weight fraction; The modified imidazole curing agent has the functions of latency and toughening. The one-component epoxy adhesive of the present application has a long room temperature storage period, which can reach 570-632 hours; only heating is needed to simultaneously realize free radical polymerization curing and thermal curing, forming an interpenetrating network type resin material with high strength and high toughness; there is no strict requirement for raw materials and packaging substrates, overcoming many defects existing in traditional dual-curing epoxy adhesives.

The present invention provides a heat-resistant antibacterial AS composite material, which is prepared from the following raw materials in parts by weight: 66.4-88.8 parts by weight of AS, 10-30 parts by weight of glass fiber, 0.4-0.8 parts by weight of a compatibilizer, 0.4-0.8 parts by weight of an inorganic silver antibacterial agent, and 0.3-2 parts by weight of an auxiliary agent, wherein the compatibilizer is a styrene-maleic anhydride-acrylonitrile copolymer, and the anhydride content of the compatibilizer is 14%-20%. The AS composite material prepared by the present invention has an antibacterial rate of more than 99% against Escherichia coli and Staphylococcus aureus, and the AS composite material does not change color and has excellent mechanical strength.

The application provides a preparation method of a boron-nitrogen compound, and the preparation method comprises the following steps: a coupling reaction of a raw material benzoindole derivative and bromo-chloro-fluorobenzene to obtain an intermediate compound, reaction of the intermediate compound with an aryl boronic acid compound, then a coupling reaction with a carbazole compound, and then a lithiation-boronization-cyclization reaction to obtain a boron-nitrogen compound of formula I. The synthesis method has the advantages of high yield and easy purification of the product.

The present invention relates to an epoxy adhesive and a preparation method and application thereof. The raw materials for preparing the epoxy adhesive include a combination of a phenolic epoxy resin, an alicyclic epoxy resin, an active diluent, a curing agent and a curing accelerator; the curing accelerator includes an amine compound with a specific structure. The present invention uses a phenolic epoxy resin and an alicyclic epoxy resin as the main resin, and combines a curing accelerator with a specific structure, thereby reducing the amount of active diluent, greatly improving the high-temperature shear strength and interface bonding ability of the solid crystal adhesive, and solving the problem that the epoxy adhesive is difficult to balance between high thermal conductivity, excellent operating performance and high reliability.