346 results about "Prepared Material" patented technology

The invention relates to the technical field of refrigeration material preparation, in particular to an efficient passive radiation refrigeration material suitable for a sub-super environment and a preparation method and application of the efficient passive radiation refrigeration material. The method comprises the following steps: uniformly mixing thermoplastic polyurethane, sunlight high-reflection inorganic particles and a phase change material in a solvent; after a chemical foaming agent is added, the obtained suspension liquid is heated and foamed in a confinement mold, and wet gel is formed; and finally, carrying out freeze drying treatment to obtain the composite porous aerogel. The prepared material has a micro-nano porous skeleton formed by TPU, and inorganic particles and PCM are uniformly dispersed in the skeleton wall. Through component cooperation and a special porous structure, the material has extremely high sunlight reflectivity and mid-infrared emissivity, self-adaptive temperature regulation and control are achieved through PCM phase change, the problem that refrigeration of a traditional material fails in the sub-environment such as the vertical surface is effectively solved, and efficient sub-super-environment heat management is achieved.

The invention discloses a polyurethane foaming material with a gradient density skin-core structure and a preparation method thereof, and the preparation method comprises the following steps: step 1, injecting a mixed polyurethane foaming raw material into a preheated foaming mold, and closing the mold; step 2, synchronously starting a mold rapid cooling system and an air pressure balance system for foaming and curing when the reaction raw materials are injected; and step 3, taking out the product after curing, standing at room temperature, and curing to obtain the polyurethane foam material. The surface temperature of the mold is suddenly reduced through quenching temperature control so as to form a compact skin layer, and an in-mold pressure curve is controlled by using an air pressure balance program so as to accurately regulate and control foaming of a core layer. The prepared material has a continuous gradient density structure, the skin layer density is high, the core layer density is low, a transition interface with strong binding force is arranged between the skin layer and the core layer, and the extreme performance combination of'hard outside and soft inside 'is successfully realized.

The utility model relates to the technical field of automatic feeding of bowl-shaped plugs, and discloses an accompanying feeding device of a bowl-shaped plug pressing machine, which comprises a movable feeding mechanism and a fixed material preparation mechanism, the accompanying feeding device of the bowl-shaped plug pressing machine is automatically designed, materials are prepared through the fixed material preparation mechanism, then the prepared materials are added into the movable feeding mechanism, and the movable feeding mechanism and the fixed material preparation mechanism are fixed. In the process that the movable feeding mechanism moves to place a batch of bowl-shaped plugs at designated positions and then press-fitting is conducted through a press, the fixed material preparation mechanism can prepare to add the next batch of bowl-shaped plugs at the same time, continuous operation is achieved, the working efficiency is improved, and the labor cost is reduced.

The invention relates to the technical field of adsorption functional materials, in particular to a plant fiber substrate-based instantaneous absorption type damp-proof drying sheet and a preparation method thereof, and the preparation method comprises the following steps: S1, selecting a plant fiber paper base meeting preset flatness and moisture content requirements; s2, the prepared materials are sequentially dispersed in pure water, then a silane coupling agent is added, and the uniform composite adsorption liquid is formed. S3, completely immersing the plant fiber paper base selected in the step S1 into the composite adsorption liquid; s4, the impregnated paper base is firstly subjected to rapid freezing treatment and then transferred into a controlled vacuum environment to be slowly heated; s5, drying the paper base in a constant hot air environment; and S6, the paper base is cut according to the design specification, and a dried sheet finished product is obtained. According to the plant fiber paper-based drying sheet disclosed by the invention, a multi-component composite moisture absorption system is combined with freezing-vacuum lock hole treatment, so that the synergistic improvement of the structural stability and the moisture absorption performance of the plant fiber paper-based drying sheet is realized.

According to the preparation method and the application of the high-nickel positive electrode material with the core-shell structure, the deep charge-discharge specific capacity and the cycling stability of the layered positive electrode material are remarkably improved by controlling the calcination condition of the high-nickel positive electrode material in an oxygen-free environment, regulating and controlling the oxygen vacancy on the surface of the material and synthesizing the sample with the core-shell structure. Meanwhile, the method is simple, effective and low in cost, and the prepared material is good in morphology uniformity and suitable for large-scale production.

The invention discloses a covalent organic framework with oxidation-reduction activity and a bionic nano-channel structure as well as a preparation method and application of the covalent organic framework, and belongs to the technical field of environmental protection. According to the preparation method, 2, 4-dihydroxybenzene-1, 3, 5-tricarboxaldehyde and 2, 5-bis (allyloxy) terephthaloyl hydrazine are taken as raw materials, a two-dimensional covalent organic framework with oxidation-reduction activity is synthesized, and then a sulfonic acid group with negative charges is covalently grafted, so that a functional material with a bionic nano-channel structure is formed. The material has regular porous channels and rich functional sites, the porous channels provide efficient mass transfer paths and adsorption spaces for uranyl ions, and the functional sites realize specific recognition of the uranyl ions through oxidation-reduction reaction and electrostatic interaction, so that the material shows synergistic advantages of strong selectivity, high adsorption capacity and rapid adsorption kinetics on uranium. The method is simple and low in cost, and the prepared material is clear in structure, good in hydrophilicity, capable of efficiently adsorbing uranyl ions and good in application prospect.

The present invention discloses a transparent super-hydrophobic cultural relic protection material and a preparation method thereof. The method first grafts a hydrolyzed silane coupling agent onto the surface of silica, and then utilizes the amino group of the hydrolyzed silane coupling agent to react with the carboxyl group of a chain fatty acid to graft a chain alkyl group onto the surface of silica particles. The prepared material has excellent super-hydrophobicity, a large contact angle of water droplets on the coating surface, and a small rolling angle, making it difficult for water droplets to stay on the coating surface, thereby effectively preventing moisture penetration. At the same time, due to the transparency of the silica particles and the chain fatty acid, the coating can maintain a high transparency and will not block or change the original color and pattern of the cultural relic. The silane coupling agent acts as a bridge connecting the silica particles and the chain fatty acid, which can enhance the chemical bonding inside the coating, making the coating less prone to aging and cracking, and giving the material good high-temperature resistance and the advantage of resisting ultraviolet light, thereby extending the preservation life of the cultural relic.

The invention discloses a double-station efficient numerical control processing machine which comprises a material storage bin, two material trays are arranged on the material storage bin, when one material tray is used for processing, the other material tray can synchronously carry out manual material preparation, and when the processed material tray is used up, a system is automatically and seamlessly switched to the material tray with prepared materials for continuous processing. The shutdown waiting time of a production line caused by manual feeding in a traditional mode is thoroughly eliminated, and the overall production efficiency is remarkably improved; meanwhile, a portal frame is arranged above the storage bin, a second moving unit is installed on the portal frame, and the two ends of the second moving unit are connected with mechanical arms. The traditional clamping jaw exchange mode depending on a rotating air cylinder is abandoned, a high-response and high-precision servo motor is adopted to drive a servo rotary table, the rotating angle of a clamping jaw air cylinder is precisely controlled, and the clamping jaw exchange efficiency is improved; high repeated positioning accuracy of the clamping jaw position and accurate positioning of any angle are achieved, it is guaranteed that the clamping jaw can rapidly and accurately reach the preset grabbing position every time, and the grabbing success rate and positioning consistency are greatly improved.

The invention discloses a preparation method of high-toughness physical hydrogel, and belongs to the technical field of hydrogel preparation. The preparation method comprises the following steps: preparing polyvinyl alcohol into a polymer solution, mixing tannic acid and iron ions to prepare a complex solution, blending the two solutions to prepare a flocculation hydrogel of a tannic acid-iron ion complex and polyvinyl alcohol, centrifugally collecting the flocculation hydrogel, pressing the flocculation hydrogel into a sheet material, and drying the sheet material to obtain the tannic acid-iron ion / polyvinyl alcohol composite material. The hydrogel is soaked in a poor solvent for dehydration for mechanical property regulation and control, and then the hydrogel and deionized water are subjected to solvent exchange to obtain the high-strength and high-toughness physical hydrogel. The novel hydrogel material with high strength and high toughness is prepared from cheap and easily available commercial raw materials through a simple blending and efficient mechanical property reinforcing and toughening strategy, and the prepared material realizes unification of strength and toughness, and has important application prospects in multiple fields such as biomimetic materials, flexible electronics and energy.

The invention discloses a layered structure solid oxide fuel cell composite cathode catalyst as well as a preparation method and application thereof, and belongs to the field of solid oxide fuel cells. The invention aims to solve the problem that the electro-catalytic performance and low-oxygen reduction reaction activation energy of the existing medium-temperature solid oxide fuel cell are poor. The Sr2. 9Ca0. 1Fe2O7-CuO composite cathode catalyst is prepared by adopting a sol-gel method and a solid phase method, the components in a sol-gel system are in a nanometer range, the reaction is easier to carry out, the reaction temperature is low, the prepared materials are uniformly mixed, and the sol-gel method is carried out in a solution, so that even if the content of doped elements is very low, the doping can be easily realized; the material is prepared by adopting a solid phase method, and the method has the advantages of convenience in operation, simple synthesis process, uniform particle size, no agglomeration of powder particles, good filling property, low cost, high yield and the like, so that the electrochemical performance of the cathode catalyst is improved, and the method is convenient to operate and suitable for industrial production.

The invention relates to the technical field of wave-absorbing materials, in particular to a broadband wave-absorbing material and a preparation method and application thereof. According to the preparation technology of the wave-absorbing material, a non-woven fabric carrier with graded pores and continuous gradient distribution is constructed by virtue of induction of a centrifugal force field, and then the non-woven fabric carrier is placed in a magnetic dispersion liquid system to be subjected to impregnation ultrasonic dispersion load treatment, so that heterogeneous interface structures are constructed on the surfaces and the interiors of fibers, and the prepared material fabric has the characteristics of light weight and broadband wave-absorbing performance; the method is suitable for military and civil high-tech fields such as electromagnetic protective clothing and invisibility. The method has the advantages of short production period, high raw material utilization rate and the like.

The invention relates to the technical field of agricultural films, and particularly discloses a preparation method of a light nano regulating agent, which comprises the following steps: step 1, preparing materials: preparing an aluminate coupling agent and an inorganic nano material dispersing agent in a weight ratio of 2: 100; 2, mixing: stirring the raw materials prepared in the step 1 at a high speed, and fully mixing the raw materials to prepare a modified inorganic nano material dispersing agent; 3, the weight ratio of the color regulating agent to the modified inorganic nano material is 10: 100, and the light nano regulating agent is prepared after high-speed stirring and mixing; the inorganic nano-material dispersing agent is one or more of nano BaSO4, nano CaCO3 or nano SiO2, a high-speed stirrer is used for high-speed stirring in the step 2, the aluminate coupling agent reacts with hydroxyl or carboxyl on the surface of the inorganic nano-dispersing agent through alkoxy, and the hydrophilic nano-material is converted into organic affinity, so that the interface bonding force between the hydrophilic nano-material and the resin is enhanced; the light nano regulating agent has the characteristics of simple process and low cost, and the light conversion performance of an agricultural film can be improved by using the light nano regulating agent to prepare the agricultural film.

The invention belongs to the field of positive electrode materials, and particularly relates to a core-shell ferromanganese phosphate precursor, a modified lithium ferric manganese phosphate material, a preparation method and application of the modified lithium ferric manganese phosphate material and a lithium ion battery. The core-shell ferromanganese phosphate precursor comprises a core and a shell wrapping the core, and the core is Fe3 (PO4) 2; the shell is MnxFe1-x (PO4) y (ferromanganese phosphate), x is more than or equal to 0.1 and less than or equal to 0.9, and y is more than or equal to 0.67 and less than or equal to 0.75. The invention provides a core-shell ferromanganese phosphate precursor which takes Fe3 (PO4) 2 as a core and MnxFe1-x (PO4) y as a shell, and when the core-shell ferromanganese phosphate precursor is used for preparing lithium ferromanganese phosphate, the problem of component segregation is solved, and the Jahn-Teller effect of manganese is reduced; especially for subsequent doping and coating, doping segregation is expected to be reduced, coating interface impedance is reduced, and rapid charging of the prepared material and cycling stability under large current can be remarkably enhanced.

The invention discloses a preparation method of a high-strength corrosion-resistant PVDF-based composite material, and belongs to the technical field of composite materials. The method mainly comprises the following steps: (1) preparing surface nanocrystallization carbon fibers with SiO2 nano layers on the surfaces through alkali liquor activation, silanization and in-situ growth processes; (2) preparing fluorine-containing modified graphene oxide; (3) mixing the filler with PVDF resin, introducing a VDF monomer for in-situ polymerization, and constructing a chemical bonding interface; (4) respectively preparing outer layer slurry rich in nano TiO2, middle layer slurry rich in surface nanocrystallization carbon fibers and inner layer slurry rich in SiO2 coated Al2O3 core-shell nanoparticles by quantitatively supplementing specific filler; and (5) carrying out gradient tape casting, segmented drying, hot press molding and annealing treatment to prepare the composite material. The problems that a traditional PVDF material is weak in interface bonding and corrosion resistance and strength are difficult to consider at the same time are solved, and the prepared material has excellent mechanical strength and strong acid corrosion resistance.

The invention discloses a block magnesium-based composite material capable of quantitatively regulating and controlling the content of nano-particles and a manufacturing method of the block magnesium-based composite material, and belongs to the technical field of metal-based composite material preparation. The method comprises the following steps: providing a magnesium alloy substrate and a cover plate, determining the sectional dimension of a groove of the cover plate according to the volume fraction of target nanoparticles, processing the groove, then filling the groove with the nanoparticles, assembling the cover plate on the substrate in an inverted buckling manner to form a to-be-processed assembly, performing multi-pass stirring friction processing to form a first composite material layer, and stacking the first composite material layer as a new substrate layer by layer to form a second composite material layer; and finally, the target block magnesium-based composite material is prepared. Through the correlation design of the groove size and the target volume fraction, accurate control and uniform dispersion of the nano-particle content are achieved, the problems that a traditional method is high in defect rate, limited in size and the like are solved, the strength and plasticity of the prepared material are remarkably improved, the process is green and environmentally friendly, and the method is suitable for mass production of large-size components and can be popularized to various light metal matrixes; the application prospect is wide.

The invention provides an antibacterial antifouling material and a preparation method thereof, and belongs to the technical field of antibacterial hydrophobic materials. The preparation method comprises the following steps: reacting choline chloride serving as an antibacterial modification raw material with isocyanate to obtain acrylic acid esterified choline chloride, and carrying out ultraviolet curing in an ethanol solution by taking an acrylate compound and trimethoxyvinyl silane as hydrophobic raw materials to obtain the antibacterial antifouling material. The prepared material has good long-term antibacterial performance and antifouling performance, firstly, the material retains the antibacterial performance of a quaternary ammonium salt structure and has good hydrophobicity, so that the material not only has the antibacterial performance, but also has the good hydrophobicity, effectively prevents bacterial adhesion, increases the antibacterial effect and has the antifouling effect at the same time.

The invention relates to the technical field of adhesives, in particular to a two-component hybrid adhesive and a preparation method thereof, and the two-component hybrid adhesive comprises a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 50 to 70 parts of silane modified polymer, 10 to 30 parts of reinforcing filler, 2 to 6 parts of silane coupling agent and 3 to 7 parts of curing agent; the component B is prepared from the following raw materials in parts by weight: 40 to 60 parts of modified epoxy resin, 10 to 30 parts of reinforcing filler, 0.5 to 3 parts of catalyst and 0.5 to 2 parts of curing accelerator; the silane modified polymer is selected from a silane modified polyether polymer or a silane modified polyurethane polymer; according to the invention, the combination of the silane modified polymer and the modified epoxy resin is optimized, and the compatibility of the silane modified polymer and the modified epoxy resin is improved, so that the tensile modulus of the two-component hybrid adhesive is improved, and the problems that the compatibility between components of the existing two-component hybrid battery adhesive is poor, so that the prepared material is relatively soft, and the service life of the material is prolonged are solved. The tensile modulus is relatively low, and the use requirement and the safety requirement of the battery glue cannot be met.

The invention relates to the technical field of adsorption materials, in particular to ZIF-90-biochar-MF composite foam as well as a preparation method and application thereof. The preparation method comprises the following steps: by taking melamine foam as a matrix, carrying out coordination on a methanol solution of zinc nitrate hexahydrate and imidazole-2-formaldehyde to form a ZIF-90 precursor; the preparation method comprises the following steps: adding a ZIF-67 precursor into biochar to form a load liquid, then adding the load liquid into melamine foam, and then adding hexadecylamine for hydrophobic modification to obtain the ZIF-90-biochar (at) MF composite foam. According to the preparation method, cetylamine is used as a hydrophobic modifier, ZIF-90 is loaded on a melamine foam skeleton by an in-situ growth method, and charcoal is added, so that the prepared material can construct a micron-scale rough layer on the surface of a microporous membrane, the roughness of the surface of the MF skeleton is increased, and due to the fact that the surfaces of ZIF-90 and charcoal are rich in hydrophobic functional groups, the surface of the MF skeleton can be effectively improved. The surface hydrophobicity is improved, and the oil absorption performance of the composite material is improved.

The present invention relates to the field of optical material technology, and discloses a flexible organic room temperature phosphorescent material, its preparation method, and application. The preparation method comprises the following steps: dissolving a terpyridine phosphor and a polymer in water to obtain a precursor solution, annealing the precursor solution, and volatilizing the precursor solution to form a film to obtain the flexible organic room temperature phosphorescent material; the present invention uses a terpyridine compound as a phosphor and physically doping it into a polymer matrix to prepare an ultra-long organic room temperature phosphorescent material; and by regulating the doping concentration and type of phosphorescent molecules, the afterglow life and color can be regulated. The required raw materials are inexpensive and readily available, and the prepared material has the advantages of good flexibility, high transparency, and a long phosphorescence life, and has broad application prospects in the fields of afterglow display, information encryption, and anti-counterfeiting.

The invention relates to a preparation process of a sodium-ion battery hard carbon-based negative electrode material with high cycle stability, and the preparation process comprises the steps of biomass compound preparation, bamboo cane pretreatment, alkali lignin extraction, lignin purification, pre-carbonization, precursor preparation and carbonization, and creatively combines a doping method and a hydrothermal activation-carbonization method to synthesize a three-dimensional hard carbon material. The prepared material has the advantages of high cycle performance, stable rate capability, cheap and easily available raw materials, no pollution, low cost, long cycle life and the like.

The invention discloses a fused quartz ceramic material and a preparation method thereof, and relates to the technical field of fused quartz ceramics. The preparation method comprises the following steps: adding deionized water, a dispersing agent and a crystallization inhibitor into high-purity fused quartz (SiO2 content is greater than or equal to 99.9%) grading powder, mixing, grinding and drying to obtain fused quartz dry powder, adding a binder into the fused quartz dry powder, manually grinding and granulating to obtain granulated powder, and carrying out compression molding, glue discharging and sintering to obtain the fused quartz ceramic material. Through the three-stage grain composition design, the synergistic crystallization inhibitor and the two-stage sintering process, the technical defects that existing fused quartz ceramic is low in strength, poor in thermal shock resistance and prone to crystallization at the high temperature are overcome, the volume density of the prepared material is larger than or equal to 2.0 g / cm < 3 >, the bending strength is larger than or equal to 70 MPa, the water-cooling thermal shock resistance at the temperature of 1050 DEG C is larger than or equal to 50 times, and the thermal shock resistance is larger than or equal to 90%. The method is suitable for manufacturing precision structural parts in the fields of aerospace, semiconductors and the like.

The invention relates to the technical field of spacecrafts, in particular to a spacecraft defense material and a preparation method thereof, and designs a structure capable of effectively absorbing and dispersing impact energy on microscopic and macroscopic scales by utilizing computer simulation and an advanced material modeling technology. A base material with high strength, high toughness, light weight and corrosion resistance is selected, nanofibers, nanoparticles or nanosheet layers are embedded into the base material by utilizing a nanotechnology so as to enhance the mechanical property and the impact resistance of the base material, and the shape, the structure and the performance of the material are accurately controlled by adopting an advanced manufacturing technology. The prepared materials are stacked, bonded or mechanically connected together to form a final defense structure, and the structure is strictly tested. By combining a nanotechnology, composite material engineering and an additive manufacturing defense material, the deep requirement of a space exploration task is met, and the safety of astronauts and the smooth completion of the task are ensured.

The invention discloses a preparation method of an intrinsic super-tough photo-thermal phase change energy storage material, and relates to the technical field of high polymer material preparation. The preparation method of the intrinsic super-tough photo-thermal phase-change energy storage material mainly comprises the following steps: introducing 1, 5-naphthalenediol as a photo-thermal functional molecule into polyethylene glycol and diphenylmethane diisocyanate, preparing the linear intrinsic photo-thermal phase-change energy storage material with excellent mechanical properties in a polycondensation manner, and then introducing carboxyl into the linear polyurethane phase-change material to obtain the intrinsic super-tough photo-thermal phase-change energy storage material. And adding metal ions to form a dynamic crosslinking system. The mechanical toughness of a system is improved through dynamic crosslinking of metal ions and carboxyl, the photo-thermal efficiency is improved by utilizing the photo-thermal conversion capacity of 1, 5-naphthalene diphenol and the metal ions, the problem of interface incompatibility between photo-thermal functional molecules and a matrix is solved, and the prepared material has excellent toughness and photo-thermal conversion performance.

The invention discloses a coal gangue-based porous adsorption material as well as a preparation method and application thereof, and belongs to the technical field of solid waste recycling and porous functional materials. The material is prepared by taking coal gangue as a main raw material through powder forming and heat treatment. The method is characterized in that one-way pressing forming is adopted and combined with a fibrous or sheet-shaped pore forming agent with the length-diameter ratio, so that the pore forming agent is directionally arranged in the pressing process, finally, an elongated pore structure preferentially oriented in the pressing direction is formed in the material, and the fluid permeability of the material in different directions shows remarkable anisotropy. The material has high porosity, appropriate mechanical strength and excellent directional mass transfer capacity. The method is simple in process and low in cost, and high-value utilization of the coal gangue is realized. The prepared material is particularly suitable for a fixed bed or a filtering device to treat industrial wastewater, and when the main flowing direction of the wastewater is consistent with the pore orientation of the material, the bed pressure drop can be effectively reduced, and the pollutant adsorption rate and the treatment capacity can be improved.

This invention provides a high-entropy titanium-aluminum alloy and its laser melt deposition preparation method, belonging to the field of alloy preparation technology. This invention utilizes laser melt deposition to prepare high-entropy titanium-aluminum alloys. Laser melt deposition has the advantages of a large temperature gradient and rapid cooling rate, thus the prepared materials often have fine grains, dense microstructure, and excellent mechanical properties. This invention combines titanium-aluminum alloys with high-entropy alloys, improving the overall strength of the alloy. Furthermore, due to the low density of titanium-aluminum alloys, the overall density of the alloy can be reduced, meeting the requirements for lightweighting. This invention changes the final composition of the high-entropy titanium-aluminum alloy by varying the powder feeding rate of different powder materials. Compared to laser melt deposition, which involves mixing powders of different contents and placing them in a powder feeding hopper, this invention saves the processes of weighing powder and mechanical mixing. Moreover, this method is more flexible in design and can produce alloys of different compositions in batches, with significantly higher efficiency than the mechanical powder mixing method.

The utility model relates to the technical field of automatic production lines, and discloses a stock transfer device and a stock transfer system.The device comprises a first moving assembly, a second moving assembly, a third moving assembly and a bearing assembly, the second moving assembly and the third moving assembly are arranged on the bearing assembly, and the first moving assembly is connected with the bearing assembly; the bearing assembly is driven to move; the second moving assembly comprises a conveying belt, the conveying belt is arranged on the bearing assembly, and the conveying belt is used for bearing and conveying the prepared materials; the third moving assembly comprises a pushing block, and the pushing block is arranged on the bearing assembly and used for pushing the tray bearing the prepared materials. According to the scheme, the device is used for receiving the prepared materials and transferring the prepared materials into a subsequent transferring device, the transferring and transition effect is achieved, and the bearing assembly for bearing the prepared materials moves once through the first moving assembly and then moves twice through the second moving assembly and the third moving assembly; due to the overlapping design of the moving assemblies, the structural size of the prepared material transferring device is greatly reduced, and the occupied space is small.

The invention discloses a continuous flexible conductive material preparation device and method.The device comprises a continuous flexible material, a guide roller and a conductive coating assembly, the assembly is sequentially provided with a tackifying unit, a powdering unit, a curing unit, a chemical plating unit and a post-processing unit in the material conveying direction, the center lines of conveying channels of all the units are collinear, and the interface gap is smaller than or equal to 2 mm. The micro-nano metal powder seed source is planted through the powdering device, rapid growth and closing of the micro-nano metal powder seed source are achieved through chemical plating after solidification, a compact conductive network is constructed, and a finished product is obtained.The short-process, rapid, efficient and environment-friendly preparation of the continuous flexible high-conductivity material can be achieved, the prepared material is low in cost, good in conductivity and high in durability, material transmission deviation is avoided, and the continuous flexible high-conductivity material can be obtained. The method improves the compactness of the coating and the consistency of products, recovers redundant adhesion liquid and catalyst particles, reduces the production cost, and is suitable for preparation of continuous flexible conductive materials such as conductive yarns, fabrics and films.

This invention relates to the field of lithium-ion battery cathode material technology, specifically to a method for preparing and applying lithium manganese iron phosphate cathode material. The method for preparing the lithium manganese iron phosphate cathode material includes the following steps: (a) performing a first milling on a mixture containing a manganese source, a phosphorus source, a dispersant, and a ball milling aid to obtain a first slurry; performing a second milling on a mixture containing an iron source, a lithium source, and a carbon source to obtain a second slurry; (b) mixing the first slurry and the second slurry, followed by ball milling and drying to obtain a lithium manganese iron phosphate precursor; and (c) subjecting the lithium manganese iron phosphate precursor to two-stage sintering and pulverization under an inert atmosphere. The method for preparing the lithium manganese iron phosphate cathode material has advantages such as simple synthesis, low pollution, low process requirements, and good uniformity and conductivity of the prepared material.

The invention discloses a copper cyanoaurate hexagonal sheet loaded cuprous oxide material as well as a preparation method and application thereof. The copper cyanoaurate hexagonal sheet loaded cuprous oxide material comprises a copper cyanoaurate hexagonal sheet and cuprous oxide loaded on the copper cyanoaurate hexagonal sheet. According to the preparation method, copper ammonium chloride and potassium cyanoaurate are taken as raw materials, a copper cyanoaurate hexagonal sheet is prepared by a hydrothermal method, and then cuprous oxide is loaded on the copper cyanoaurate hexagonal sheet, so that the copper cyanoaurate hexagonal sheet loaded cuprous oxide material is obtained. The invention provides application of the copper cyanoaurate hexagonal sheet loaded cuprous oxide material as a catalyst for electrocatalytic reduction of carbon dioxide, and provides a gas diffusion electrode, and the catalyst in the gas diffusion electrode is the copper cyanoaurate hexagonal sheet loaded cuprous oxide material. The preparation process is simple and environment-friendly; the prepared material has higher ethylene selectivity and stability in the reaction of electrocatalytic reduction of carbon dioxide.

The invention relates to a preparation method for in-situ growth of a NiFeS nanosheet array by taking ZIF-67 as a template for integral water decomposition. The preparation method comprises the following steps: (1) treating cobalt nitrate and 2-methylimidazole by using a methanol solution to obtain ZIF-67 dodecahedron nanoparticles; then mixing the ZIF-67 and PDA in methanol, and carrying out water bath reflux to obtain Co (ZIF-67) (at) PDA for later use; and (2) putting the sample into a tubular furnace, and continuously calcining for 1 hour at 800 DEG C in an N2 atmosphere to obtain the Co-coated CN-800. And (3) carrying out hydrothermal reaction on the sample and a certain amount of FeCl3, Ni (NO3) 2, urea and NH4F to obtain NiFe-OH-Co-CN, respectively placing the prepared material and S powder in an upstream quartz boat and a downstream quartz boat of a tubular furnace, and keeping for 1 hour at 500 DEG C in an N2 atmosphere to obtain the NiFeS-Co-CN heterostructure.