34results about How to "Change surface properties" patented technology

The invention relates to a method for changing the surface performance of a collagen casing. The method comprises the following steps: treating cow split leather treated by a peeling machine by using an ammonium sulfate solution, and then treating the cow split leather by using a buffer solution; the preparation method comprises the following steps: uniformly mixing cleaned cow split leather with ice water, dicing and grinding to obtain collagen leather pulp; mixing the mucilage and a hydrochloric acid solution, adding cellulose into the hydrochloric acid solution to obtain a crude collagen colloid, and standing until the colloid is fully swelled; and homogenizing by using a homogenizer, extruding by using an extruder, and drying to obtain the tubular collagen casing. The preparation method has the advantages that the collagen casing is prepared by a wet method, a specific amount of cellulose is added during preparation to enter a network structure originally independently formed by collagen, the network space is filled, the surface roughness of the casing is increased, and meanwhile, the cellulose is combined with collagen molecules through chemical bonds to increase the stability of the network structure, so that the collagen casing is prepared. The surface performance of the casing is changed, the surface roughness is increased, the friction force between the sausage and a package is small, and the sausage is easier to package.

The invention discloses a preparation method and application of an activated carbon fiber electrode material modified through nitrogen plasma chemical vapor deposition and acidification, and the preparation method of the activated carbon fiber electrode material comprises the following steps: carrying out cleaning pretreatment on flaky activated carbon fiber; performing normal-temperature nitrogen plasma chemical vapor deposition on the pretreated active carbon fiber to obtain a first modified precursor active carbon fiber N-ACF, immersing the N-ACF in nitric acid, and performing heating acidification treatment to obtain a second modified active carbon fiber N-Acid-ACF, thereby completing the preparation. The electrode material disclosed by the invention is prepared by adopting a green and environment-friendly method, is simple and efficient, effectively improves the electrical generation efficiency of hydrogen peroxide, has ultrahigh degradation performance on phenol, and also has good stability. In addition, polar plates are not consumed in the process, equipment is simple, operation and management are convenient, and wide popularization space and use value are achieved.

The invention provides a composite flotation reagent for separating feldspar and quartz and a flotation method. The composite flotation reagent for separating the feldspar and the quartz comprises a first flotation agent, a second flotation agent and a third flotation agent, and the first flotation agent comprises, by mass, 20-25 parts of a collecting agent and 1-4 parts of a pH adjusting agent; and the second flotation agent comprises the following components in parts by mass: 6-8 parts of an inhibitor and 1-4 parts of mixed phosphate. According to the method, one-time flotation separation of quartz and feldspar is conducted on the lepidolite tailings through the flotation reagent, quartz fine sand with the SiO2 content higher than 99% can be obtained, the standard requirement of glass industry materials is met, and the effect is close to the flotation separation effect of hydrofluoric acid; therefore, the flotation process is simplified under the condition that the flotation effect is guaranteed, and compared with flotation separation conducted through a hydrofluoric acid method, the influence of flotation separation conducted through the composite flotation reagent for separating feldspar and quartz in the embodiment on the environment is greatly reduced.

The invention relates to the technical field of catalytic decomposition of N2O, in particular to a transition metal oxide catalyst with biomass as a surface structure control agent and application of the transition metal oxide catalyst in low-temperature catalytic decomposition of N2O. The preparation method comprises the following steps: dissolving biomass (agar) in water, adding a transition metal oxide soluble salt, heating and stirring for reaction, and after the reaction is finished, drying, grinding and calcining the obtained product to obtain a target product. The prepared catalyst takes a transition metal oxide as a catalytic main body, takes an improved sol-gel method as a preparation means, and assists the preparation of a high-activity transition metal oxide catalyst by adding low-price agar as a surface structure control agent of the catalyst, so that the performance of the catalyst for catalytically decomposing industrial waste gas N2O pollution is improved. According to the invention, chemical reaction between the agar and the transition metal oxide is utilized to achieve the purposes of increasing the specific surface area of the catalyst, destroying surface lattices and forming a large number of oxygen vacancies and lattice defects, so that the performance of the catalyst for catalytically decomposing N2O is improved.

The invention discloses a defect detection sample data generation method and related equipment, and relates to the technical field of defect detection sample data generation, and the defect detection sample data generation method comprises the steps: obtaining a good product background image and an expected defect direction; based on the expected defect direction, respectively generating a structure guide mask and a semantic guide text cue word according to the defect knowledge base; inputting the non-defective product background image, the structure guiding mask and the semantic guiding text cue word into a local redrawing model, synthesizing a local defect image, and determining defect labeling information of the local defect image according to the structure guiding mask; and integrating the local defect image and the defect labeling information, and outputting defect detection sample data. According to the method, the structure guide mask and the semantic guide text cue word are generated through the defect knowledge base and are input into the local redrawing model to synthesize the local defect image, so that the defect image is effectively generated, and finally, the beneficial effect of improving the accuracy when the defect sample image is used for defect detection is achieved.

The invention discloses an aluminum-based MOF mixed matrix membrane based on perfluoroalcohol modification as well as a preparation method and application of the aluminum-based MOF mixed matrix membrane. The preparation method comprises the following steps: adding perfluoroalcohol into an aluminum-based MOF nanocrystal dispersion liquid with a polar surface to obtain a perfluoroalcohol modified aluminum-based MOF nanocrystal; and uniformly blending the aluminum-based MOF as a channel material with a polymer membrane casting solution, and preparing the aluminum-based MOF high-performance mixed matrix membrane through a solution casting method. According to the preparation method, the aluminum-based MOF is modified by adding perfluoroalcohol, so that crystallinity and a pore structure can be kept, the surface characteristics of nanocrystals can be remarkably changed, the dispersity of the aluminum-based MOF in a membrane casting solution of the mixed matrix membrane can be improved, and the common problems of poor interface compatibility, pore channel blockage and the like of the mixed matrix membrane are solved. The aluminum-based MOF mixed matrix membrane provided by the invention has excellent molecular sieving capacity and structural stability, and can realize efficient separation of systems such as carbon dioxide / methane, ethylene / ethane and alkane isomers.

The invention discloses a preparation method of an aerogel composite material doped with an interface modified infrared opacifying agent, which comprises the following steps: uniformly dispersing the opacifying agent in aerogel precursor sol, and uniformly stirring to form composite sol; injecting or spraying the composite sol onto a fiber base material to form a wet gel composite material, and performing aging and supercritical drying treatment on the wet gel composite material to obtain a silicon dioxide aerogel composite material; the opacifying agent is infrared opacifying agent powder subjected to interface modification by using an interface modifier, and the interface modifier is a compound containing at least one functional group capable of forming stable-connection chemical bonds with silicon hydroxyl in an aerogel network structure and at least one functional group capable of generating strong interaction with the infrared opacifying agent powder. The infrared opacifying agent powder is any one of titanium dioxide, silicon carbide, zirconium oxide, white carbon black and ferric oxide. The method can enhance the interface bonding force, improve the dispersity, improve the stability and optimize the performance, and the preparation method is simple and easy to implement and suitable for industrial production.

A high-strength refractory material and its preparation method and application, belonging to the technical field of refractory materials, the raw materials of the refractory material include fused corundum, high-alumina bauxite clinker, metal silicon powder, anti-cracking agent, titanium aluminum carbide and titanium carbide, etc., wherein the anti-cracking agent is prepared by modifying boron phenolic resin, mesophase asphalt, artificial graphite powder and silicon carbide fiber. The refractory material of the present invention adopts metal silicon powder to improve wear resistance and oxidation resistance, titanium aluminum carbide to improve oxidation resistance, titanium carbide to improve strength, and anti-cracking agent after surface modification and film formation to greatly improve thermal shock resistance and reduce thermal expansion rate and slag erosion rate. In addition, adding titanium aluminum carbide can improve strength and thermal shock resistance to a certain extent, has good oxidation resistance, and improves erosion resistance. The refractory material can be used for high carbon steel and low carbon steel, and is particularly suitable for casting high oxygen steel, calcium treated steel and high manganese steel.

This invention relates to a modified asphalt and its preparation method, comprising: (1) mixing styrene tar with a pretreatment solvent, allowing it to stand and separate into upper and lower liquid layers; (2) removing the pretreatment solvent from the upper and lower liquid layers respectively to obtain liquid phase Y1 and liquid phase Y2; (3) mixing waste rubber powder with liquid phase Y1 and reacting them, followed by solid-liquid separation to obtain solid phase G1, while simultaneously recovering the separated liquid phase Y3; (4) mixing solid phase G1 with liquid phase Y2 to obtain mixture G2; and (5) adding mixture G2 to the base asphalt to obtain modified asphalt. This invention pretreatment of hazardous waste styrene tar before its use as an additive improves the mixing effect of waste rubber powder and base asphalt, ensures product quality, realizes the resource utilization of styrene tar, and reduces production costs.

The invention relates to a tranexamic acid oral dissolving system for improving bioavailability, which relates to the technical field of medicines and comprises a tranexamic acid oral dissolving film and a tranexamic acid oral dissolving tablet. The design of the oral dissolving tablet and the oral dissolving film fully considers the requirements of different patient groups and the characteristics of medicine absorption, the characteristic that the oral dissolving tablet can be taken without water improves the compliance of patients, the problem that traditional tablets are difficult to swallow is solved, and the oral dissolving tablet and the oral dissolving film have very good application prospects for patients who often travel or need to take medicine under the anhydrous condition. An orally disintegrating system has good convenience; the tranexamic acid oral dissolution system can be rapidly disintegrated in the oral cavity, so that the medicine is rapidly dispersed, the contact area with the oral mucosa is increased, the medicine is promoted to be absorbed through the oral mucosa tissue and other pregastric regions, the bioavailability is improved, and the medicine absorption speed is increased.

The present invention relates to the technical field of composite fibers, and specifically discloses an ES large biological fiber containing a bioactive component and a preparation method thereof. The ES large biological fiber is prepared by the following method: S1, preparing the bioactive component; S2, uniformly mixing the bioactive component with polyethylene particles to obtain a cortex material, and uniformly mixing the bioactive component with polyester slices to obtain a core material; S3, using a composite spinning device, respectively feeding the cortex material and the core material into two groups of screw extruders for melt extrusion, and the obtained cortex melt and the core layer melt are composited into filaments through a composite spinning component, and then cooled and stretched by side blowing to obtain the desired ES large biological fiber. The preparation method of the present invention is simple, low in cost, and suitable for industrial production. The prepared ES large biological fiber has excellent biological activity and mechanical properties, and the biological activity is long-lasting, and is suitable for a variety of application fields, such as medical textiles, sanitary products, personal care products, etc.

The application discloses an anti-erosion auxiliary gel material and a preparation method and application thereof. The preparation method of the anti-erosion auxiliary gel material comprises the following steps: 1) mixing regenerated red brick powder with a particle size of 3-10 microns, waste concrete regenerated micro powder with a particle size of less than 10 microns and water to perform a pre-hydration reaction, and then separating a solid product to obtain pre-hydration regenerated powder; 2) calcining the pre-hydration regenerated powder, and then rapidly cooling to room temperature and performing grinding to obtain active regenerated powder; and 3) uniformly mixing the regenerated red brick powder with a particle size of less than 3 microns and the active regenerated powder to obtain the anti-erosion auxiliary gel material. The anti-erosion auxiliary gel material can be added in a large amount in concrete, can effectively improve the anti-Cl ‑ erosion performance of the concrete, does not affect the mechanical properties of the concrete, and is suitable for large-scale industrialized production and application.

This invention discloses a method for preparing in-situ grafted and dispersed nano-silica, relating to the field of nanomaterial preparation technology, comprising the following steps: Step ①, mixing sodium-free silica sol solution, water, and polyol in a high-pressure reactor; Step ②, gradually raising the reactor temperature from room temperature to 150-180℃, initially introducing acid anhydride gas or liquid at a certain flow rate, and maintaining temperature, constant pressure, and rotation speed until the pH value reaches 4.0-5.0±0.5, obtaining a primary mixture of hydrated nano-silica; Step ③, pumping an organosilicon coupling agent into the high-pressure reactor using a high-pressure metering pump, maintaining temperature and pressure, stirring the reaction for 30-90 minutes, then cooling, depressurizing, purging with nitrogen, and separating the reaction liquid to obtain grafted and dispersed nano-silica. This application aims to achieve readily available and inexpensive raw materials, reduce the difficulty of preparing nano-silica; solve the problems of dispersibility and compatibility with organic matter in nano-silica; simplify the procedure and improve preparation efficiency.

The invention relates to the technical field of anti-corrosion pigments, in particular to a long-acting anti-corrosion pigment and a preparation method thereof. The long-acting anti-corrosion pigment is prepared from the following raw materials in parts by weight: 40 to 60 parts of attapulgite, 10 to 30 parts of zinc phytate, 5 to 10 parts of zirconium oxide, 1 to 3 parts of silane coupling agent, 8 to 15 parts of lanthanum ricinoleate and 5 to 10 parts of modified Ti3C2Tx nanosheet. The long-acting anti-corrosion pigment disclosed by the invention is prepared from the following components: lanthanum ricinoleate, modified Ti < 3 > C < 2 > T < x > nanosheets and the like. The lanthanum ricinoleate and the modified Ti3C2Tx nanosheet can effectively improve the corrosion resistance of the pigment. The obtained pigment has excellent corrosion resistance, and experimental results show that the acid resistance of the obtained pigment is larger than 36 d, the alkali resistance of the obtained pigment is larger than 32 d, the salt water resistance of the obtained pigment is larger than 45 d, and the salt fog resistance of the obtained pigment is larger than 20 d.

The present application relates to the technical field of silicone rubber material, in particular to a sericite modified silicone rubber material and a preparation method thereof.The present application overcomes the problems of poor dispersion of sericite in the organic silicon matrix and poor compatibility of fluorosilicon and common silicon.The silicone rubber material is prepared from polysiloxane hybrid base glue prepared by in-situ polymerization of fluorine-containing / ethenyl double modified sericite, fluorosilicon raw rubber, methylphenylvinyl silicone rubber, MQ silicone resin, hydrogen-containing silicone oil and vulcanizing agent;the preparation process involves double functional group grafting on the surface of sericite, monomer in-situ ring-opening polymerization coating, multiphase blending to build interpenetrating network and hydrogen-containing silicone oil chain extension to cooperate with gradient vulcanization, through building a rigid-flexible stereo enhanced network, the material is endowed with excellent oil resistance, heat resistance and high mechanical strength, and can be used in the field of automobile manufacturing.

This invention provides a device and method for simulating sediment resuspension under hydrodynamic action, relating to the field of sediment simulation. Addressing the problem that current wave-generating simulations of dynamic disturbances easily lead to the breakage of suspended particles, this invention simulates the action of water flow in a natural river by installing baffles within the water tank cavity to form multiple flow channels. The segmented circulation of water flow simulates the sediment resuspension process. When the grid blades agitate the water, the grid structure divides the water flow into multiple smaller streams, thus dispersing the force of the water flow. The originally concentrated impact force is dispersed to various parts of the grid, and when it is transmitted to the suspended particles, the magnitude and concentration of the force are significantly reduced, preventing the particles from breaking due to excessive external force.

The invention relates to lightweight thermal insulation concrete and a preparation method, and relates to the field of building materials, the lightweight thermal insulation concrete comprises the following components by mass: 60-100 parts of cement, 5-10 parts of modified SEBS, 20-40 parts of fly ash, 30-60 parts of ceramsite, 0.5-1.5 parts of a compound foaming agent, 10-20 parts of a modified cellulose filler, 0.005-0.015 part of a foam stabilizer, 0.5-1.5 parts of a water reducer and 30-50 parts of water; the modified SEBS is prepared from the following raw materials: an SEBS body, itaconic acid and allyl glycidyl ether. The preparation method comprises the following steps: mixing and stirring cement, modified SEBS, fly ash and modified cellulose filler, adding ceramsite, and stirring to obtain a dry mixture; preparing a water reducing agent solution, and preparing a foaming agent dispersion liquid; adding water into the dry mixture, stirring, adding a water reducing agent solution, and stirring to obtain a wet mixture; and adding the foaming agent dispersion liquid into the wet mixture, and carrying out pressure foaming to obtain the lightweight thermal insulation concrete. The method has the effect of improving the thermal insulation performance and the anti-cracking performance of the concrete.

This invention belongs to the field of ceramic substrate surface spraying technology, specifically relating to a transition coating suitable for ceramic cold spraying, its preparation method, and its application. The transition coating for ceramic cold spraying provided by this invention comprises 19.5–94.5 wt% glaze, 0.1–0.5 wt% carboxymethyl cellulose, and 5–80 wt% nickel powder. The key to this invention lies in using a specific ratio of glaze, carboxymethyl cellulose, and nickel powder as raw materials, and forming a transition coating on the surface of ceramic materials through heat treatment. This transition coating not only has good bonding performance with the ceramic material surface but also alters the surface properties of the ceramic material, enabling the ceramic surface with the transition coating to form a metallic coating through cold spraying. It also enhances the bonding strength between the metallic coating and the ceramic material surface, improving the reliability of the metallic coating. This provides a solution to the problem of difficulty in forming metallic coatings on ceramic surfaces through cold spraying and the poor reliability of such metallic coatings.

The invention discloses a beneficiation process for beneficiation and recovery of scheelite and fluorite from argillized tungsten polymetallic ore. The beneficiation process sequentially comprises the steps of magnetite removal, low-intensity magnetic separation mineral removal, sulphide ore removal through acidification, scheelite-fluorite mixed concentration and centrifugal separation to obtain scheelite concentrate and fluorite concentrate. By adopting magnetic separation and flotation operation, corrosion to equipment can be reduced, meanwhile, the grade and the recovery rate of the scheelite concentrate and the fluorite can be improved, and under the condition that the strong magnetic tailings contain 0.34% of tungsten and 25.65% of fluorite, the scheelite concentrate with the tungsten content of 17.96% and the accumulative recovery rate of 20.42% can be obtained through tests; the content of fluorite in the fluorite concentrate is 77.86%, and the accumulative recovery rate is 47.72%.

The invention discloses a catalyst for electrolyzing seawater as well as a preparation method and application thereof, and belongs to the technical field of electrolyzed water. The MOFs-based electrocatalyst with excellent chloride ion corrosion resistance, stability and high controllability is synthesized through sulfuration treatment and is used for seawater electrolysis OER reaction. The catalyst has excellent structural stability, chlorine corrosion resistance, more surface active sites and high catalytic activity. After the catalyst is subjected to an electrochemical test, only Ni3S4 is reconstructed to form S-O anions, and NiFe-MOF is not obviously oxidized and structurally changed, so that the catalyst has good structural stability; meanwhile, S-O anions can be preferentially adsorbed to Fe < 3 + > in a heterogeneous interface, so that an electronic structure of nearby Ni < 2 + > is regulated and controlled, and the adsorption and desorption capacity of Ni < 2 + > to an OER reaction intermediate is optimized.

This invention discloses a high-adhesion UV-cured waterproof printing process for paper printed materials, belonging to the field of printing technology. The process includes vacuum dehydration of hydroxyl-terminated hyperbranched polyester, followed by reaction with isophorone diisocyanate using a catalyst to obtain a prepolymer; then, partial reaction with hydroxyethyl acrylate and monohydroxyl-terminated polydimethylsiloxane, followed by reaction with a silane coupling agent until the isocyanate peak disappears, yielding a modified resin; under light and water-protected conditions, the resin, reactive diluent, photoinitiator, fluorocarbon modified acrylate, and dehydrating agent are rapidly dispersed in a specific ratio to obtain a UV-cured waterproof varnish; this varnish is then coated onto paper printed materials with an ink layer, leveled, and subjected to UV primary curing, followed by standing at a suitable temperature and humidity for 24-48 hours to obtain a high-adhesion waterproof paper printed material. This invention promotes further cross-linking of the silane groups in the system, resulting in an extremely strong bond between the varnish layer and the paper printed material with an ink layer, thus achieving excellent high adhesion.

The invention provides high-adhesion LED-UV metal printing ink and a preparation method thereof, and belongs to the technical field of ink. The preparation method comprises the following steps: preparing the surface modified nano composite powder; preparing a composite anti-aging agent; preparing an acrylate prepolymer; preparing a modified prepolymer; mixing to prepare the printing ink. The preparation method comprises the following steps: preparing nano-composite powder with ultraviolet resistance from tetrabutyl titanate and zinc nitrate hexahydrate as raw materials, blending the nano-composite powder into slurry, adding a sodium silicate solution and cerous sulfate, carrying out a reaction, carrying out surface modification on the nano-composite powder, inhibiting the photocatalytic activity of the nano-composite powder, and carrying out surface modification on the nano-composite powder. After the anti-aging agent is added into the ink, the anti-aging performance of the ink can be effectively improved, and the anti-discoloration performance of the ink can be improved.

The invention relates to the technical field of saliva pads, in particular to a saliva pad for transesophageal ultrasound and cardiac examines.The saliva pad comprises a water absorption layer and a waterproof layer, and a preparation method of the water absorption layer comprises the steps that polyvinyl alcohol, sodium carboxymethyl cellulose, modified calcium carbonate and copper / zinc oxide modified chitosan are added into water to be mixed, spinning the spinning solution to obtain antibacterial fibers, and blending the antibacterial fibers and cotton fibers to obtain the antibacterial cotton fiber. According to the saliva pad for transesophageal ultrasound and cardiac examination, the water absorption and antibacterial property are optimized, and the defects of a traditional method in the aspect of saliva receiving and treating are effectively overcome. According to the saliva pad, the comfort level of a patient can be improved, the workload of medical staff can be reduced, the risk of cross infection can be reduced, and a safer, more comfortable and more efficient solution is provided for the field of medical examination.

The invention discloses a method and a device for prolonging the storage period of milled rice with embryo, and relates to the technical field of prolonging the storage period of the milled rice with embryo. Comprising the following steps: treating milled rice with embryo by adopting cold plasmas, soaking the milled rice with embryo treated by the cold plasmas in a biological enzyme solution, and realizing degradation balance by optimizing the enzyme concentration and soaking time and controlling the degradation rate, thereby achieving the effects of delaying excessive degradation of lipid and starch in rice grains and improving the quality of the milled rice with embryo. Then a nano coating liquid is prepared from a natural polymer and a natural antioxidant, a coating is formed on the surface of the milled rice with embryo, the coating can provide a protective barrier, the antioxidant is added into the coating liquid, the oxidation resistance of the rice grains is enhanced, the shelf life of the rice grains is prolonged, and finally low-temperature drying is performed, so that the quality of the milled rice with embryo is improved. And the concentration of nitrogen and oxygen in the storage environment of the milled rice with embryo is adjusted by adopting a gas adjusting technology, so that the oxidation reaction speed of the milled rice with embryo is slowed down, and the storage period of the milled rice with embryo is prolonged.

The invention relates to the technical field of coal gangue activation, in particular to a coal gangue activating and calcining method which comprises the following steps: pretreating coal gangue, adding a sodium hydroxide solution and an auxiliary agent into the pretreated coal gangue, and mixing and stirring to obtain a mixture; calcining the mixture to obtain coal gangue clinker; according to the method, the dispersity of the coal gangue is improved through treatment of the auxiliary and sodium hydroxide, agglomeration among particles is avoided, sodium hydroxide reacts with SiO2 in the coal gangue to generate sodium silicate, the chemical activation process is initiated, and then through calcination and acid leaching, the coal gangue can be effectively activated. Active sites of the coal gangue are increased, the surface property of the coal gangue is changed, an aluminate hydration product with a gelling effect is generated in the calcining process, and the activation effect of the coal gangue is improved.

The present invention relates to a method for preparing a composite new material for signal hydrogen molecules, belonging to the technical field of composite materials. The preparation method of the present invention comprises firstly heat-treating activated carbon fibers, and then modifying the heat-treated activated carbon fibers through a series of chemical reactions. The modified composite new material has good adsorption effect on hydrogen and also has biocompatibility and good antibacterial property. The composite new material for signal hydrogen molecules prepared by the preparation method has excellent hydrogen supply capacity, which can reach up to 7.6mmol / g, which is much higher than hydrogen-rich water (0.8μmol / g). The effective hydrogen supply time is long-lasting, which can reach up to 23 days, which is much higher than the effective hydrogen supply time of hydrogen-rich water (about 3h). In addition, the antibacterial property is excellent, and the composite new material has good inhibitory effect on Escherichia coli and Staphylococcus aureus. The antibacterial method is physical antibacterial, so it is harmless to the human body and can be safely used in clinical hydrogen medicine.

The invention discloses a high-voltage lithium cobalt oxide positive electrode material and a method and application for improving the spin state of the high-voltage lithium cobalt oxide positive electrode material, and belongs to the technical field of battery preparation. The method specifically comprises the following steps: (1) preparing a lithium cobalt oxide coarse material, and then crushing and sieving the lithium cobalt oxide coarse material; and (2) collecting the sieved powder, and treating the powder by adopting at least two modes of magnetic field assistance, plasma treatment and calcination to prepare the high-voltage lithium cobalt oxide positive electrode material with a raised spin state. The high-voltage lithium cobalt oxide positive electrode material with high spin-state Co < 4 + > is prepared through cooperation of different treatment modes in magnetic field, plasma and sintering treatment, the coverage degree of lattice oxygen energy bands is improved, and lattice oxygen sites are anchored; the volume expansion of the lithium cobalt oxide is inhibited through a magnetostrictive effect, so that the arrangement of an ordered layered structure of the high-voltage lithium cobalt oxide positive electrode is realized; meanwhile, dissolution of Co < 4 + > can be inhibited in a high-voltage interval, and the defect that a material interface is unstable can be overcome.

The invention relates to sprayed concrete and a preparation method thereof, and relates to the technical field of concrete.The sprayed concrete is prepared from, by weight, 365-410 parts of cement, 790-830 parts of fine aggregate, 710-760 parts of coarse aggregate, 70-100 parts of fly ash, 75-95 parts of modified yellow phosphorus slag, 12-16 parts of accelerator, 4.5-7 parts of water reducer, 3-6.5 parts of natural plant admixture and 155-175 parts of water; the natural plant additive is prepared from beet root tubers and gelidium amansii in a weight ratio of (1-2): (5-9). On the basis of an existing shotcrete batching system, the natural plant admixture and the modified yellow phosphorus slag are introduced, all the components have a synergistic effect, the construction requirements for the initial strength and the later strength of the shotcrete are met, the rebound rate of the shotcrete is remarkably reduced, and the shotcrete has a good application prospect. The method can be widely applied to construction of various supporting projects such as tunnels and roadways.

The invention provides a high-temperature-resistant battery box and a preparation method thereof, and belongs to the technical field of composite materials, and the high-temperature-resistant battery box comprises the following components in parts by weight: 65-70 parts of polypropylene, 17-20 parts of glass fiber, 3-4 parts of conductive crystalline flake graphite, 3-5 parts of nitrogen-doped TiO2, 3-5 parts of rice hull ash, 0.6-0.8 part of a lubricant, 11-14 parts of a compatilizer, 0.2-0.6 part of an antioxidant and 0.7-1 part of a light stabilizer. The long-term high temperature resistance of the polypropylene composite material can be improved, so that the service life of the prepared battery box in a high-temperature environment is prolonged.

The invention relates to a nano-scale bismuth-based glass fiber composite photocatalytic material and a preparation method thereof, the preparation method comprises the following steps: pretreatment: adding a modifier into chopped glass fibers, and enabling the chopped glass fibers to react with the modifier to obtain modified glass fibers; the modifier is a silane coupling agent KH-550, an amino silane coupling agent, an epoxy silane coupling agent or a methacrylate coupling agent; the synthesis method comprises the following steps: dissolving Bi (NO3) 3.5 H2O, Na2WO4 and 5H2O in deionized water to obtain a mixed solution, infiltrating the modified glass fiber by using the mixed solution, transferring the glass fiber into a reaction kettle, carrying out a thermal chemical reaction, and centrifuging and washing the obtained white precipitate after the reaction is completed to obtain the glass fiber composite photocatalytic material. The preparation method has the advantages of optimizing the dispersibility of the material and the exposure degree of active sites, improving the catalytic efficiency and stability and enhancing the application adaptability in a complex medium.