84results about How to "Easy reunion" patented technology

The present application relates to the field of ABL aluminum-plastic composite sheets, and more specifically, it relates to an ultra-high barrier EVOH aluminum-plated composite sheet and a preparation method thereof. An ultra-high barrier EVOH aluminum-plated composite sheet comprises an outer film, a first adhesive layer, a barrier layer, a second adhesive layer, and an inner film fixedly arranged in sequence; the barrier layer is made of an aluminum-plated EVOH film, the aluminum-plated EVOH film comprises an EVOH film layer and an aluminum layer covering the surface of the EVOH film layer, and the EVOH film layer is prepared from a modified EVOH material, and the modified EVOH material comprises the following components in terms of the mass percentage of the modified EVOH material: 2‑8% muscovite, 1‑5% quartz powder, 1‑5% feldspar powder, 0.1‑0.5% coupling agent, and EVOH supplements the remainder. The composite sheet of the present application has a significant barrier effect on water and oxygen, and has good mechanical properties.

The invention discloses a preparation method of a rod-like selenium nano-carrier, and belongs to the technical field of nano-pesticides. The rod-like selenium nano-carrier is formed by converting chitosan modified amorphous selenium (a-Se) into single crystal ash selenium (t-Se). The amorphous selenium is initially spherical, and after chitosan modification, the spherical amorphous selenium is converted into single crystal ash rod-shaped selenium nanoparticles. The length of the rod-like selenium nano-carrier is 590-610 nm, the diameter of the rod-like selenium nano-carrier is 20-25 nm, the effective average particle size of the rod-like selenium nano-carrier is 90-110 nm, the drug loading rate is 39.28% + / -2%, and the encapsulation efficiency is 64.90% + / -3%. In addition, the invention also provides an application of the rod-like selenium nano-carrier in a nano bactericide material.

The invention discloses an ultra-fine grinding thinning grinding wheel and a preparation method thereof.The grinding wheel comprises a grinding wheel base body and tool bit assemblies, a plurality of reserved grooves are formed in the circumferential direction of the grinding wheel base body at equal intervals, and the tool bit assemblies are arranged in the reserved grooves; the tool bit assembly comprises, by volume fraction, 35%-45% of composite abrasive micro powder, 30%-45% of a ceramic bonding agent, 20%-30% of a double-effect pore forming agent, 1%-3% of a filling agent, 1%-2% of a dispersing agent and a temporary bonding agent accounting for 5% of the total weight. Through design optimization of the grinding wheel formula and the preparation method, the better wafer surface quality can be obtained under the ultra-fine grinding and thinning process, and meanwhile, the stability and the long service life of the grinding wheel in the service process are guaranteed; and a composite abrasive material combination and a double-effect pore-forming agent are matched and optimized, so that the optimized superfine abrasive material combination obtains a high-quality grinding and thinning surface, and meanwhile, the stable and long-acting service life is considered.

The invention provides a device and a method for improving transparency of a natural water body by utilizing a microalgae biological membrane, and belongs to the field of water treatment, and the device comprises a water tank, rollers, a microalgae attachment matrix, a water distribution device and a lighting device. The transparency of the natural water body is effectively improved through the microalgae biological membrane. The microalgae biological membrane secretes macromolecular extracellular polymeric substances, can adsorb suspended particulate matters and soluble organic matters in water, and inhibits the reproduction of other planktons through nutrition competition, so that the turbidity is reduced. In addition, the device is designed as up-flow water inlet, so that the contact between the water body and the microalgae biological membrane is enhanced, and the treatment effect is improved. LED lamps and a heating device are adopted to keep a proper growth environment, and meanwhile, a photovoltaic power generation system is arranged, so that green and environment-friendly effects are achieved. The method is simple and easy to implement, low in cost and convenient to manage and maintain, and a novel and effective technical scheme is provided for improving the transparency of the natural water body.

The invention provides a preparation method of modified nano silicon powder wrapped by a polymer, which comprises the following steps: dissolving a polymer PVDF (Polyvinylidene Fluoride) in an organic solvent N-dimethylformamide DMF (Dimethyl Formamide), carrying out ultrasonic treatment, adding Si powder, adding the Si powder in three times, and then carrying out magnetic stirring, so that nano metal powder and a polymer solution are fully mixed; the preparation method comprises the following steps: adding an energetic oxidant AP into a polymer solution containing nano Si powder according to a mass ratio of PVDF / AP of 1: 3, magnetically stirring, and carrying out ultrasonic treatment to obtain a precursor solution PVDF / AP / Si; and relevant parameters are set, and the coated and modified shell-core type nano composite metal powder is prepared through a spray granulation method. According to the invention, the yield of the silicon-based compound can be improved, the energy and combustion performance of the compound are improved, and the cost of coating silicon powder is effectively reduced. In addition, the PVDF, the AP and the silicon powder are wrapped according to the optimal proportion, so that the energy release efficiency of the compound Si-coated PVDF / AP reaches the maximum.

The invention belongs to the technical field of high-voltage electric appliance material preparation, and particularly relates to a zinc oxide resistor disc and a preparation method and application thereof. The preparation method comprises the following steps: (1) pre-sintering zinc oxide powder; (2) mixing the zinc oxide powder obtained in the step (1), an auxiliary agent and a dispersion liquid, and carrying out ball milling to obtain slurry; the particle size D50 of the slurry is 0.8-1.2 [mu] m, and the dispersity is greater than or equal to 95%; (3) performing spray drying and granulation on the slurry to obtain granulation powder; (4) carrying out molding and first sintering on the granulated powder to obtain a resistor disc semi-finished product; the first sintering adopts sectional sintering; and (5) forming an electrode layer on at least one surface of the resistor disc semi-finished product by adopting a vacuum sputtering and / or electrophoretic deposition process, and performing secondary sintering and annealing. The contact resistance of the zinc oxide resistor disc is less than or equal to 5m omega; and after 1000 hours of aging in a 85 DEG C + 85% RH environment, the leakage current increase is less than or equal to 2 [mu] A, and the performance degradation rate is less than or equal to 5%.

The invention relates to a preparation method and application of poly (D-mannose) nano-selenium, explores the potential of the poly (D-mannose) nano-selenium in inhibiting the activity of various common food-borne pathogenic bacteria and the formation of biofilms, and provides scientific basis and technical support for the application of the poly (D-mannose) nano-selenium in the fields of food preservation and food safety. The preparation method comprises the following steps: 1) uniformly mixing a poly D-mannose solution and a sodium selenite solution at a certain speed to form a mixed solution; 2) slowly dropwise adding an ascorbic acid solution into the mixed solution prepared in the step 1) to promote generation of poly D-mannose-selenium nanoparticles; (3) carrying out dialysis treatment, so as to obtain pure poly D-mannose-selenium nanoparticles; the poly D-mannose-selenium nano-particles prepared by the invention have remarkable inhibitory activity on various food-borne pathogenic bacteria, particularly have a remarkable inhibitory effect on formation of biofilms of staphylococcus aureus and bacillus cereus, and are innovations on the preparation method and application of the poly D-mannose nano-selenium.

The invention relates to a preparation method of a super-hydrophobic composite coating based on magnetically-induced fluorinated graphene, which comprises the following steps: loading magnetic nanoparticles among fluorinated graphene sheets subjected to low-temperature ultrasonic dispersion by adopting a thermal solvent method to obtain a magnetic nanoparticle-fluorinated graphene composite material; coating the surface of a base material with a coating containing the magnetic nanoparticle-fluorinated graphene composite material, and then applying a directional magnetic field with a certain magnetic field intensity on the coating base material, so that the magnetic nanoparticle-fluorinated graphene composite material is directionally moved to the surface of the coating; the surface of the super-hydrophobic composite coating is provided with a microcosmic rough structure, and the super-hydrophobic composite coating has the characteristic of low surface energy. According to the preparation method, the dispersity of the fluorinated graphene in an organic resin matrix is improved, and the preparation process is simple, environmentally friendly, free of pollution and low in cost and can be used for large-scale production; according to the coating prepared by the preparation method, the corrosion resistance of the coating can be enhanced, multiple functions of hydrophobicity, corrosion prevention, antifouling and the like can be integrated, and the requirements of different application scenes are met.

The present application relates to a kind of in situ low-temperature confined carbonization construction carbon dot enrichment coating layer manganese-based positive electrode material and its preparation method, by accurately coordinating the evolution condition of carbon point carbon source in the mixing system environment of coating process, freezing condition and sublimation and carbonization, realize the whole process synergistic control of carbon point carbon source spatial distribution, ice crystal template state, skeleton construction of controlled conversion of carbon point carbon source and harmful residue removal on the surface of manganese-based positive electrode material, successfully constructed the carbon dot enrichment coating layer of size controllable, density adjustable, ion permeability good and interface combination firm on the surface of manganese-based positive electrode material, to realize the synergistic promotion of manganese-based positive electrode material cycle performance, rate performance and interface stability.

The invention discloses a polishing composition suitable for a barrier layer of a copper interconnection structure of an integrated circuit and application of the polishing composition. The polishing composition comprises an oxidizing agent, silica sol, a silane-terminated polymer, a complexing agent, a pH regulator, a corrosion inhibitor and deionized water. According to the silane-terminated polymer component contained in the polishing composition, after siloxane groups at molecular chain ends are hydrolyzed, the siloxane groups and silicon hydroxyl groups on silica sol particles are condensed into covalent bonds, polymer chain segments are grafted to the silica sol particles in the form of covalent bonds, agglomeration of the silica sol particles can be improved, the hardness of the silica sol particles can be reduced, and the polishing effect of the polishing composition is improved. And the effect of improving surface defects after material polishing is achieved.

The invention discloses a high-dispersity antimony oxide flame-retardant master batch based on nano modification and a preparation method thereof, and belongs to the technical field of flame-retardant modification of high polymer materials. The flame-retardant master batch consists of the following components in percentage by weight: 30-50% of nano antimony oxide, 3-8% of a dispersion modifier, 40-65% of carrier resin and 1-5% of a dispersing aid. The preparation method comprises the steps of nano antimony oxide pretreatment, mixing, melt extrusion, granulation and the like. Nano antimony oxide is subjected to surface modification through the dispersion modifier, and the synergistic effect of the auxiliary dispersant and the carrier resin is combined, so that the surface energy of the nano antimony oxide is effectively reduced, the problem that the nano antimony oxide is easy to agglomerate in a polymer matrix is solved, and high dispersity is realized; meanwhile, the flame-retardant synergistic efficiency is remarkably improved, the stability of the flame-retardant property of the material is ensured, and the mechanical property and the processing fluidity of a high polymer material are not damaged.

The present invention belongs to the technical field of fine chemical industry, and discloses a dispersant for dispersing heavy element single substance and compound powder and a preparation method thereof, wherein the main function is to be used as a powder dispersant, especially suitable for dispersing heavy element powder that is easy to settle; bismuth powder, lead powder, tungsten powder, lead oxide, lead tetraoxide, bismuth oxide, tungsten oxide, lead tungstate, lead borate and other functional particles with shielding ability. The anionic dispersant containing multiple hydrophilic groups such as sulfonic acid group, ester group and hydroxyl group in the structural formula is used to disperse heavy element powder, which can neutralize the excess charge on the oxide surface and wrap the powder particles, and finally form a uniform and stable high-content heavy element powder latex system, creating conditions for preparing radiation-proof latex products.

The invention belongs to the technical field of sealing materials, and particularly relates to a sealing material with oxygen uptake and a preparation method and application thereof. The oxygen-absorbing sealing material comprises a base material and a modified active substance, the modified active substance comprises a core material active substance and a wall material coating the core material active substance; the core material active substance comprises at least one of a polyhydroxy compound active substance, a catechol active substance, a persulfate active substance, an iron active substance, a hydrogenation catalyst active substance and an enzyme active substance. According to the invention, the core material active substance is included by the wall material, so that the modified active substance is uniformly dispersed in the base material, the thermal stability of the core material active substance is obviously improved, the problems of easy inactivation and instability of the core material active substance are improved, and the sealing material has good transparency and oxygen uptake.

This invention discloses an antifouling membrane made of lanthanum-loaded carbon nanomaterials suitable for phosphorus recovery in wastewater, its preparation method, and its applications. The invention involves loading lanthanum carbonate octahydrate onto the surface of multi-walled carbon nanotubes (MWCNTs) to form lanthanum-loaded carbon nanomaterials (La@MWCNTs), which are then deposited onto the surface of a polyethersulfone-based membrane using vacuum filtration to form a self-supporting membrane. The prepared lanthanum-loaded carbon nanomaterial antifouling membrane possesses both phosphorus removal and recovery capabilities, exhibiting high efficiency in phosphorus removal from water. This facilitates phosphorus elution and recovery, effectively solving the problems of lanthanum-loaded carbon nanomaterial aggregation and recovery, and effectively avoiding the risk of lanthanum-based adsorbent leakage during phosphorus removal. Furthermore, the lanthanum-loaded carbon nanomaterial antifouling membrane operates within a low-pressure range, exhibiting low energy consumption and effectively mitigating membrane fouling caused by humic acid. It shows promising application prospects in wastewater phosphorus recovery and eutrophication control.

The invention belongs to the field of sodium ion positive electrode materials, and relates to a preparation method of a ball cactus-shaped sodium ion battery positive electrode material, which comprises the following steps: S1, carrying out wet grinding on a mixture of a sodium source, an iron source, a phosphorus source, gelatin and a carbon nanotube to obtain slurry; s2, carrying out spray drying treatment on the slurry to obtain precursor powder; and S3, calcining the precursor powder in one step in an oxygen-free environment to obtain the ball cactus-shaped sodium ferric pyrophosphate positive electrode material coated with the nitrogen-doped carbon material on the surface. The ball cactus-shaped sodium ferric pyrophosphate positive electrode material coated with the nitrogen-doped carbon material on the surface is obtained through wet grinding, spray drying and one-step calcination treatment. The ball cactus-shaped morphology can significantly increase the specific surface area, interlayer spacing and porosity of the positive electrode material, increases the contact area between the positive electrode material and an electrolyte, and can realize comprehensive improvement of conductivity, capacity, low-temperature performance, cycle performance and high-rate performance.

The application discloses a kind of solid electrolyte material and its preparation method, positive pole piece, solid electrolyte film and full solid battery, it is related to solid battery field;Method comprises: lithium lanthanum zirconium oxygen base solid electrolyte is dispersed in first solvent, and electrolyte dispersion liquid is made;Acidic pH regulator is added to the electrolyte dispersion liquid, and the pH of the electrolyte dispersion liquid is adjusted to 7~8, and neutral dispersion liquid is obtained;Orthosilicate is added to the neutral dispersion liquid and mixed to obtain dispersion solution;During mixing process, polysiloxane is formed by the reaction of orthosilicate, and polysiloxane is coated on the surface of lithium lanthanum zirconium oxygen base solid electrolyte;The dispersion solution is subjected to electrolyte separation and drying treatment to obtain a solid electrolyte material.The application aims to improve the surface properties of lithium lanthanum zirconium oxygen base solid electrolyte, so that it can build good interface contact with other inorganic materials.

The invention belongs to the technical field of electro-catalysis, and particularly discloses a Cu nanoparticle / acidified carbon nanotube catalyst and a preparation method and application thereof.According to the preparation method, acidified pretreated carbon nanotubes with good conductivity and high specific surface area are selected as a substrate, CuO nanoparticles are evenly loaded through a hydrothermal method, and the Cu nanoparticle / acidified carbon nanotube catalyst is obtained; and growing a zeolite imidazate framework material-8 (ZIF-8) on the surface of the CuO nanoparticle-loaded carbon nanotube in situ, and regulating the thickness of an ultrathin nitrogen-carbon layer on the surface and coordination of Cu-N by regulating the calcining temperature and time. According to the Cu nanoparticle / acidified carbon nanotube catalyst as well as the preparation method and the application thereof, the Cu nanoparticles are encapsulated in a confined manner, so that long-service-life electrically-driven CO2 is converted into a high-added-value C2 + product, catalytic active sites of the Cu nanoparticles are fully exposed, the charge transfer rate is increased, and the intrinsic activity of the Cu active sites is improved.

The present invention relates to the technical field of high-strength and high-toughness steel, and specifically to a processing technology and application of high-strength and high-toughness steel. The present invention uses C, Cr, Ni, Mo, Mn, Si, Ti, Nb, Al, S, and Fe as raw materials to prepare a steel strip with excellent mechanical properties, and then further improves its wear resistance and mechanical properties by nitriding the steel. The present invention sprays an anti-corrosion coating on the surface of the high-strength and high-toughness steel, thereby enhancing its corrosion resistance. When preparing nano-silicon dioxide, the present invention adds tannic acid as a pore-forming agent, increases the specific surface area of ​​nano-silicon dioxide, and enables it to have more active sites that can be grafted with metal-organic framework composite materials, thereby enhancing the corrosion resistance of the coating. The high-strength and high-toughness steel prepared by the method provided by the present invention has a yield strength greater than 1400MPa, a tensile strength greater than 1600MPa, an elongation after fracture greater than 45%, and excellent mechanical properties.

This invention discloses a gas diffusion layer with multi-level mass transfer channels, its preparation method, and its application. The gas diffusion layer with multi-level mass transfer channels includes a substrate layer and a microporous layer on the substrate layer; wherein the microporous layer comprises carbon black, hollow porous carbon nanofibers, and optionally a hydrophobic binder. This invention uses hollow porous carbon nanofibers as a novel MPL carbon material to synergistically construct a gas diffusion layer with better water vapor management capabilities in conjunction with carbon black particles. The resulting gas diffusion layer exhibits excellent comprehensive performance; its hollow porous structure provides additional water transport channels, improving water vapor transport capacity, thereby enabling the assembled membrane electrode to have better output performance.

The invention provides a polyvinyl acetate aqueous dispersion with a self-stabilizing structure and a preparation method of the polyvinyl acetate aqueous dispersion. The polyvinyl acetate aqueous dispersion is prepared from a vinyl acetate monomer and at least one hydrophilic anchoring monomer through a free radical polymerization reaction, wherein the hydrophilic anchoring monomer is embedded into a polyvinyl acetate molecular chain in a polymerization process, so that an obtained polymer molecule forms a self-stabilization dispersion structure with a hydrophilic interface layer in a water phase. A hydrophilic anchoring structure unit is introduced into a polyvinyl acetate molecular chain to form a core-shell type particle structure with a core formed by a hydrophobic polyvinyl acetate chain segment and an outer layer interface formed by a hydrophilic anchoring monomer, so that polymer molecules can spontaneously form a stable dispersion structure in a water phase; the problem that polyvinyl acetate is easy to agglomerate in a water phase is solved from the molecular structure level, so that the polyvinyl acetate aqueous dispersion with uniform particle size and good storage stability is obtained under the condition that no or only a small amount of surfactant is needed.

The present application belongs to the technical field of preparation of multi-curved surface silicon carbide, and discloses a preparation method of reaction sintering multi-curved surface silicon carbide whole plate, comprising: mixing 100 parts of alpha-SiC powder, 15-20 parts of composite carbon source, 1-2 parts of silicon carbide fiber, 2.3-3.8 parts of dispersing agent, 8-12 parts of water-soluble phenolic resin, 2-4 parts of additive and 42-46 parts of water according to weight parts, pre-dispersing, ball-milling, spray granulating, pressing into multi-curved surface green body; the green body is stacked with graphite support parts and filled with graded silicon particles, and is subjected to step-by-step degreasing and step-by-step reaction sintering under vacuum argon, and then is cooled after temperature control to obtain the product. Through the synergistic effect of formula control of composite carbon source, specific ternary additive and fine sintering process, the technical problem of sintering cracking and cracking of multi-curved surface whole plate is eliminated, and the product density, bending strength and fracture toughness are effectively improved.

The invention discloses a preparation method of high-end medical and hygienic superfine-denier hot-melt self-adhesive fibers, and relates to the technical field of hygienic fibers. According to the preparation method, an oxygen-containing functional group is introduced into a polyethylene glycol terephthalate core layer raw material through argon plasma treatment, then ethylenediamine tetraacetic acid is grafted on the surface of single-layer graphene oxide to serve as a hybrid filler, the heat stability of the core layer during high-temperature melting spinning is improved, and the sterilization effect is improved through graphene oxide. Secondly, polyethylene is grafted with a carboxylic acid monomer, and modified polyethylene and amino of chitosan are subjected to a Michael addition reaction to generate Schiff base; hydroxyl groups on the chitosan can also react and combine with carboxyl groups of the hybrid filler in the core layer, so that the overall mechanical property of the ES fiber is improved; and the superfine denier fiber greatly improves the uniformity and strength of the resultant yarn in textile processing, and is beneficial to improving the count of the yarn. The high-end medical and hygienic superfine-denier hot-melt self-adhesive fiber prepared by the invention has the effects of antibiosis and excellent mechanical properties.

The invention relates to the technical field of HDPE resin, and discloses flame-retardant high-toughness HDPE resin and a preparation method thereof.The flame-retardant high-toughness HDPE resin is prepared through the steps that phosphonitrilic chloride trimer, 4, 5-diamino-o-diphenyl nitrile, hydrazine hydrate and the like serve as raw materials, an intermediate 2 is obtained through a reaction, amino in the intermediate 2 and vanillic aldehyde are subjected to condensation to obtain vanillic aldehyde cyclotriphosphazene, and the vanillic aldehyde cyclotriphosphazene is subjected to flame retardant modification to obtain the flame-retardant high-toughness HDPE resin. The flame-retardant and high-toughness HDPE resin is prepared by the following steps: by taking 3-isocyanate propyl triethoxy silane as a bonding arm, reacting with an intermediate 2 and attapulgite to obtain attapulgite-based cyclotriphosphazene, and finally adding vanillin cyclotriphosphazene and the attapulgite-based cyclotriphosphazene into HDPE (High-Density Polyethylene) to melt, blend and press, thereby obtaining the flame-retardant and high-toughness HDPE resin. The HDPE resin prepared by the invention has excellent flame retardant property, heat resistance and mechanical property.

This invention discloses a DBD powder processing device and method based on three-dimensional turbulent mixing technology, belonging to the field of powder uniform processing technology. The device includes a gas supply unit, a DBD reactor, and a monitoring unit. The gas supply unit is connected to the DBD reactor and is used to provide working gas and reaction medium to the DBD reactor. The DBD reactor includes a device platform, a plasma cylinder, and a second electric motor. A stirring paddle and a first electric motor are installed inside the plasma cylinder. The first electric motor drives the stirring paddle to rotate and stir the powder to be processed inside the plasma cylinder. The plasma cylinder is fixed on the inclined surface of the device platform. The second electric motor is located at the bottom of the device platform and is fixedly connected to the plasma cylinder, driving the plasma cylinder to rotate. The monitoring unit is connected to the DBD reactor and is used to discharge and monitor the powder to be processed inside the plasma cylinder. This invention achieves uniform powder dispersion while using low-temperature plasma modification technology, suppressing powder adhesion and agglomeration.

The application discloses a kind of biocompatible materials and preparation method for bionic porous intervertebral fusion cage, belong to intervertebral fusion cage material technical field.A kind of biocompatible materials for bionic porous intervertebral fusion cage, by weight parts includes the following components: polyether ether ketone 65-80 parts, modified functional filler 15-25 parts, hydroxyapatite 8-12 parts, flow modifier 0.5-1 part;The modified functional filler is graphene oxide coated modified barium titanate functional filler.By introducing surface conductive modified nano piezoelectric ceramic particles, realize the effective conversion and transmission of mechanical stimulation to bioelectric signal, this microstructure design makes the insulating polyether ether ketone matrix possess the electric activity of simulating natural bone stress-electric signal response mechanism, so as to be favorable to activate osteoblast activity and promote bone integration of implant interface.

The present application relates to the field of magnesium phosphate cement-based materials, and specifically discloses a preparation method of a waterproof and anti-permeation magnesium phosphate cement-based material and application thereof. The preparation method comprises the following steps: taking 80-100 parts by weight of magnesium phosphate cement, 5-8 parts by weight of a setting and hardening regulator, 10-14 parts by weight of a hydrophobic agent prepared by the present application, 7-10 parts by weight of modified graphene oxide and 30-40 parts by weight of active slag powder. After the above raw materials are uniformly mixed, 25-32 parts by weight of mixing water is added, and a magnesium phosphate cement-based material is obtained. The present application takes magnesium phosphate cement as the main component, and adds the hydrophobic agent, modified graphene oxide and active slag powder, so that the problems of insufficient waterproofness and anti-chloride ion erosion of the magnesium phosphate cement coating are overcome, and the magnesium phosphate cement-based material has good crack resistance and secondary protection capability, and can effectively resist the erosion of water and chloride ions.

The application discloses a Ru / CeO2-SiO2 catalyst for hydrogen production by ammonia decomposition and a preparation method thereof, and belongs to the technical field of catalyst preparation. The catalyst comprises an active component Ru and a carrier CeO2 / SiO2. The CeO2 nanoparticles are uniformly dispersed on the surface of SiO2 by using an electrostatic adsorption method, and the active component Ru nanoparticles are selectively loaded on the surface of CeO2. The CeO2 has a unique Ce 3+ -Ce 4+ The variable valence capacity can form rich oxygen vacancies. The generation of the oxygen vacancies is favorable to enhancing the interaction intensity between Ru and CeO2, improving the electronic structure of the Ru surface, activating reactants, optimizing reaction kinetics, and promoting the ammonia decomposition reaction. In addition, the Ru particles are only distributed on the surface of CeO2, and even if the CeO2 moves on the surface of SiO2 at high temperature, the active component Ru will not be agglomerated, so that the Ru / CeO2-SiO2 catalyst exhibits excellent ammonia decomposition reaction catalytic performance and good stability.

The invention relates to the technical field of traditional Chinese medicine compositions, in particular to a traditional Chinese medicine composition for treating deep venous thrombosis. The traditional Chinese medicine composition is prepared from the following raw materials in parts by weight: 5-8 parts of modified traditional Chinese medicine sustained release microspheres, 2-3 parts of a traditional Chinese medicine compound extract, 15-23 parts of modified polyacrylamide, 5-7 parts of chitosan and 40-60 parts of deionized water, 10-15 parts of astragalus membranaceus, 3-5 parts of peach kernels, 8-12 parts of rhizoma atractylodis, 4-6 parts of salvia miltiorrhiza, 1-2 parts of radix ophiopogonis, 4-7 parts of pseudo-ginseng and 5-8 parts of ligusticum wallichii are taken, traditional Chinese medicine effective components are extracted through water extraction, organic solvent extraction and fermentation, and the prepared traditional Chinese medicine composition can effectively treat deep venous thrombosis.

The invention discloses a pepper planting soil improvement method which comprises the following steps: S1, deep ploughing and soil improvement: deeply ploughing soil for 30-35 cm in a whole garden deep ploughing mode except for the lower part of a pepper tree crown in a planting field, harrowing, leveling, and removing sundries in the soil; then plant straw with the thickness of 5-10 cm is flatly laid, and then the soil is deeply ploughed by 30-40 cm; 1000-1500 kg of a high-quality decomposed organic fertilizer, 100-120 kg of a calcium superphosphate phosphate fertilizer and 300-400 g of a soil conditioner are applied per 667 m < 2 >, and the soil conditioner is prepared from, by weight, 45-60 parts of egg shell residues, 2-3 parts of pepper branch wood chips, 2.5-3 parts of tea residues, 0.2-0.5 part of streptomyces erythroflavus, 0.1-0.3 part of bacillus and 0.2-0.4 part of lactic acid bacteria. The zanthoxylum soil conditioner provided by the invention is applied to zanthoxylum planting soil improvement, so that the organic matter content of zanthoxylum planting soil and agglomeration of soil particles are increased, a stable soil structure is formed, and the water-retaining property, the air permeability and the fertility of the soil are improved.

This invention belongs to the fields of powder metallurgy and materials science and technology, specifically disclosing a preparation process for a high-wear-resistant WC-based composite material. The process involves preparing WC powder, second-phase powder, and graphene material; adding the graphene material to a dispersion medium and performing ultrasonic dispersion; mixing the graphene dispersion with the WC powder and second-phase powder and ball milling; drying the mixture using a vacuum rotary evaporation drying process; and densifying it using a hot-pressing sintering process. This invention enables the WC-based composite material to simultaneously achieve high hardness and high fracture toughness; effectively inhibits oxidative wear of the WC-based composite material at high temperatures, improving its high-temperature wear resistance; and achieves uniform and stable dispersion of the graphene reinforcing phase in the WC matrix, avoiding agglomeration, thereby fully utilizing its strengthening and lubrication effects. The composite material prepared by this invention is particularly suitable for use as high-speed cutting tools, high-temperature molds, and high-temperature moving parts in aerospace applications, and has broad application prospects.