121results about How to "Single shape" patented technology

The invention discloses a production method of a nanometer silver wire material. The production method comprises the following steps:(1) mixing glycerol, water, polyvinyl alcohol pyrrolidone, silver nitrate and chlorine salt and heating to 180-240 DEG C, and stirring for 30-50 minutes so as to obtain a nanometer silver wire stock solution; (2) cooling the nanometer silver wire stock solution to below 80 DEG C, and diluting with water so as to obtain a diluted nanometer silver wire solution; (3) carrying out desalting and surface active agent removing treatment on the diluted nanometer silver wire solution, and concentrating to obtain a finely purified nanometer silver wire solution; and (4) carrying out spray drying on the finely purified nanometer silver wire solution obtained in step (3) so as to obtain nanometer silver wire powder, and cooling so as to obtain a finished production of nanometer silver wire powder. The production method provided by the invention has the advantages that the process is simple and reliable, the nanometer silver wire is single in shape, the production efficiency is high and the production cost is low; and the produced products have the characteristics of high purity, good quality, uniform size distribution and the like.

The invention discloses a method for preparing mesoporous silicon dioxide nano rods through regulation and control. The method uses ammonia water as catalyst, ethanol as cosolvent, cetyl trimethyl ammonium bromide as pore-forming material, tetraethoxysilane and water as reactants, and adopts a sol-gel method to prepare the mesoporous silicon dioxide nano rods, wherein the molar ratio of ammonia water to ethanol to cetyl trimethyl ammonium bromide to tetraethoxysilane to water is 10.4:19.9:0.3:1:371-2972. The invention has the advantages that the reaction conditions are mild, the reaction is required to be conducted at normal temperature only, heating or protective gas is not required and the preparation cost is low; mesoporous silicon dioxide nano rods with different lengths and diameters can be produced through changing the added water amount only, the preparation process is simple and can be controlled easily, and the reaction time is short; and the shape of products prepared through the method of the invention is unitary and the products are not required to be further separated.

The invention discloses a preparation method of hydroxylapatite nano fibers or nano wires, comprising the following steps of: (1) adding 0.1-0.5 gram of sodium phosphates into a two-mouth round bottomed flask at 20-40 DEG C; adding 3-10 mL of 2 mol.L<-1> sodium hydroxide solutions, and mechanically stirring for 20 minutes; then adding 20 mL of oleic acid and ethanol mixing solutions with the volume ratio of 1:1, and continuously stirring for three hours; then delivering into a hydrothermal kettle; placing into an infrared insulation can at 100-180 DEG C for 5-10 hours; and (2) taking out white products inside the hydrothermal kettle; washing by distilled water for three times; washing by ethanol for three times; carrying out centrifugal separation to remove reaction residues and impurities; and finally placing the white powder products into a dry box for drying at 75 DEG C for 8 hours. The hydroxylapatite nano fibers prepared by the method have high purity, uniform grain diameter and unitary appearance.

The invention relates to a technique for synthesizing high-purity electronic grade barium titanate by a liquid phase method, which includes the following steps: oxalic acid is dissolved in deionized water, and barium chloride accounting for 2% of molar weight of oxalic acid is added in; the barium-titanium mixed solution is added into oxalic acid solution at the flow speed of 1.3-1.5m <3>/h for reaction; the obtained solid is put in a kiln for constant temperature calcination which lasts for 2-4 hours, then is taken out and processed by jet milling, placed in the kiln once more for secondary constant temperature calcination which lasts for 1-3 hours, and taken out for secondary jet milling and barium titanate powder is obtained finally. The barium titanate prepared by the invention has high purity, good dispersibility, uniform powder particle appearance and reasonable particle size. Therefore, the technique of the invention can solve the problem that the barium titanate powder prepared by the traditional method; more particularly, the existing coprecipitation method has sulphate impurities, severe glomeration, and the like, and can completely meet the requirements of the production of high-performance electronic components like base metal porcelain capacitors, etc.

The invention discloses a method for recovering valuable metals from waste lithium ion battery, which comprises the following steps: (1) pretreatment: separating positive and negative electrode powderfrom waste lithium ion battery; 2, leaching, and taking leach solution; 3) purification: adding alkali to that leach solution to adjust the pH value, and removing iron, aluminum and copper to obtainpurified solution; (4) Component control and evaporation concentration: adjusting the proportion of nickel, cobalt and manganese in the purified solution; then evaporating and concentrating, enrichingnickel, cobalt and manganese to set concentration to form precursor preparation liquid; 5) synthesis: passing the precursor preparation liquid, NaOH solution and ammonia water into a reaction kettle,controlling the pH value of the solution in the reaction kettle, carrying out reaction, and filtering after the reaction, wherein the filtered residue is the a ternary precursor. The leaching solution of the invention is purified, nickel cobalt manganese salt is supplemented, evaporated and concentrated, and the precipitant is added to directly synthesize the ternary precursor. The utility modelhas the advantages of short process flow, low consumption of raw materials, high recovery rate and high added value of products.

The invention discloses a preparation method of two-dimensional feathery copper powder under an ammonia condition, and belongs to the technical field of metal materials and powder. The copper powder prepared by the method is regular and complete feathery copper powder, has an obvious trunk and multiple levels of branch structures; each level of branch and the former level form an angle of about 60 degrees; the first level of branch grows forwards relative to the trunk; the branches more than the first level grow backwards relative to the trunk. An electrolyte comprises the following components: 0.005-0.50mol/L copper sulfate, 0.05-0.20mol/L ammonium sulfate, 0.10-2.0mol/L ammonia water, 0-1g/L additive and the balance of water. Electrolysis is carried out under the conditions that the direct current is 0.6-5.0V and the temperature is 20-75 DEG C. The copper powder on a cathode is treated by virtue of ultrasonic removal, cleaning, filtering and vacuum drying and then the light purplish-red feathery copper powder is obtained. The obtained copper powder is complete and single in shape, uniform in granularity, good in dispersibility and high in purity; the preparation process is safe and environmentally-friendly, and is simple in operating procedure and low in cost.

The invention relates to a method for preparing an orthogonal-phase MoO3 monocrystal nanosheet through chemical vapor deposition, which comprises the following steps: cleaning a quartz substrate, sequentially performing ultrasonic cleaning in acetone, ethanol and deionized water, and blow-drying with nitrogen gas; placing 0.2-0.5g of MoS2 powder into a ceramic boat, and putting into a quartz tube of a tube furnace; putting the quartz substrate at the downwind opening of the ceramic boat filled with the raw material, sealing the tube furnace, and introducing argon to wash the tube furnace; and after cleaning, introducing argon and oxygen mixed gas, turning on a vacuum mechanical pump, starting a tube furnace heating program to raise the temperature, then naturally cooling to room temperature, and taking out a sample, wherein a white product is grown on the quartz substrate and is the monocrystal MoO3 nanosheet. The invention overcomes the respective defects in wet chemical stripping, a microwave method and a hydrothermal method. According to the invention, preparation technology of alpha-MoO3 nanocrystal is expanded; the synthesis process is simple and easy to control; the used raw materials and equipment are simplex and cheap; the preparation flow is safe, non-toxic, quick and efficient; and the obtained sample is high in yield.

The invention discloses a process for preparing spherical nanometer spinel zaffre by the hydrothermal method. The process comprises the following steps: weighing and putting cobalt chloride and aluminum chloride according to a mol ratio of Co<2+> : Al <3+> = 1:2, putting the materials into a beaker, adding a proper amount of deionized water and carrying out uniform stirring on a magnetic stirrer;adding a sodium hydroxide solution drop by drop until the pH value of the mixture in the beaker is 13 and continuing stirring; adding mixed liquor of triethanolamine and glycerol with a volume fraction of 6 to 18% and resuming stirring; carrying out hydrothermal cultivation on the mixed solution at a temperature of 245 DEG C for 20 to 40 hours and taking the mixed solution out for natural coolingat room temperature; repeatedly rinsing the hydrothermal cultivation resultant material in liquid phase until the pH value equals 7 and putting the resultant material into a baking oven for drying attemperature of 60 DEG C so as to obtain spherical products with particle size less than 100 nm. The advantages of the invention are as follows: liquid phase hydrothermal cultivation is employed and composite organic matters are added; therefore, nanometer spherical powder is formed directly without calcining, energy consumption is relatively low, and no environmental pollution is generated.

The invention discloses a solvothermal preparation method for alkali manganese oxide nanowires. Manganese sulfate aqueous solution with the concentration of 0.5 to 2.0 mol/L and potassium permanganate aqueous solution with the concentration of 0.5 to 2.0 mol/L are mixed, wherein molar ratio of manganese sulfate and potassium permanganate ranges from 1/3 to 4, n-butyl alcohol aqueous solution with the volume ratio of 1/2 to 2 is added, the solution is evenly mixed, at the temperature of 120 to 220 DEG C, the solution is subjected to solvothermal reaction for 6 to 24 hours, and then alkali manganese oxide nanowires are obtained. The solvothermal preparation method for alkali manganese oxide nanowires is simple in process operation and environment-friendly. Products can be obtained directly in the solution at a low temperature without roasting. The obtained alkali manganese oxide is high in purity, narrow in size distribution and good in dispersity, and the alkali manganese oxide nanowires are suitable for industrial production. The solvothermal preparation method for alkali manganese oxide nanowires is capable of preparing high-purity and fine alkali manganese oxide nanowires suitable for industrial production without surface active agents and templates.

The invention relates to a preparation method of mesoporous silica hollow spheres with adjustable shell thickness. The preparation method comprises the following steps: (1) dissolving hexadecyl trimethyl ammonium bromide in a mixed solution of ammonia water, ethanol and deionized water, and carrying out stirring under heating; (2) adding tetraethylorthosilicate into the solution obtained in the step (1) under heating and stirring, and carrying out heating and stirring continuously; (3) carrying out solid-liquid separation on the mixture after the reaction in the step (2), washing the solid with ethanol, and drying the solid to obtain white powder; (4) dispersing the white powder obtained in the step (3) in deionized water, and carrying out drying after solid-liquid separation and ethanol washing to obtain white powder; and (5) dispersing the white powder obtained in the step (4) in an ethanol solution containing HCl, carrying out drying after solid-liquid separation and ethanol washing, and grinding the solid into powder to obtain the mesoporous silica hollow spheres. The preparation method provided by the invention is simple in process, and the shell thickness of the prepared product can be effectively adjusted.

The invention discloses flame-retardant and tear-resistant silicon rubber. The flame-retardant and tear-resistant silicon rubber comprises the following components: silicon rubber, an inner lubricating agent, a structure control agent, reinforcing filler, a flame retardant, a heat-resistant active agent, a vulcanizing agent and a coupling agent. Simultaneously, the invention also discloses a preparation method of the flame-retardant and tear-resistant silicon rubber. The preparation comprises the following steps: blending, mixing, cooling, remixing for discharging pieces, and vulcanizing and the like. The flame-retardant and tear-resistant silicon rubber disclosed by the invention has the advantages that wollastonite whiskers are fibrous crystal, mica powder is superfine powder with a layered structure, and 'filler-filler' structures are not easily generated by different powder structures under the action of the coupling agent; different powder structures can cause different stress deflections, so that the reinforcing effect is achieved; and the flame-retardant and tear-resistant silicon rubber is good in tear strength and mechanical strength as well as flame-retardant and heat-insulating properties, does not contain any halogen, and has the characteristics of less smoke generation amount and low smoke toxicity.

The invention relates to a biological 3D printing method for large tissues. A prepared sacrificial material and vascularized cells are placed in a syringe to obtain a first mixed solution and a first gel material corresponding to the first mixed solution;a prepared matrix material is mixed with tissue cells to obtain a second mixed solution and a second gel material corresponding to the second mixed solution, the first gel material and the second gel material are loaded into a 3D printer, and an outlet of the 3D printer is connected to a coaxial printing spray head; the coaxial printing spray head starts printing according to a preset path track and according to a to-be-printed organ file, extruded gel fibers are gelatinized on a refrigeration platform, matrix material components in the gel fibers are irreversibly cured, and a printing structure is obtained; the printing structure is immersed in a culture medium at a second set temperature, a hollow flow channel structure is formed, and a network structure with vascular cells is obtained; and the vascular network structure is subjected to dynamic culture, reconstruction of a vascular network in the structure is promoted, and therefore a vascularized three-dimensional tissue structure capable of keeping effectiveness of a flow channel is obtained.

The invention discloses high-performance oil-absorbing polyacrylate resin and a preparation method thereof. Through adoption of common alkyl acrylate and acrylate monomers, through optimization of the monomer composition, improvement on the monomer ratio and introduction of an ethylene-propylene-diene monomer rubber structural agent, and through suspension polymerization, particle-like high-performance oil-absorbing resin having a good surface morphology and free of surface adhesion is prepared. The resin has good oil-absorbing performance, the oil absorption multiple, the oil absorption speed rate and the oil retention rate thereof are obviously superior to those of ordinary oil-absorbing resin materials in the market, and defects of the conventional oil-absorbing materials are overcome, so that the resin has a good application prospect in the fields of petrochemical industry, military affairs, environmental treatment and the like.

The invention discloses an Au@Rh nano particle supported catalyst with a core-shell structure and a preparation method of the Au@Rh nano particle supported catalyst, and belongs to the technical field of nano-catalysts. An Au@Rh nano particle adopting a spherical shape or an urchin-like sphere shape is supported on a carrier Y, the Au@Rh nano particle adopts the core-shell structure, the core is Au, and the shell is Rh. Firstly, a gold nanoball is prepared with a seed growing method, then, the Au@Rh nano particle is prepared with a continuous reduction method, and finally, the Au@Rh/Y catalyst is prepared with an equivalent-volume impregnation method. The preparation process is simple, the reaction condition is easy to control, the shape of a product is single, the granularity is uniform, the yield is high, and the prepared Au@Rh/Y catalyst has excellent catalytic activity on a CO oxidation reaction.

The invention relates to a preparation method of amino-containing energetic material graded microspheres, belonging to the technical field of micro-nanomaterials. The preparation method comprises the steps of: dissolving urea in absolute ethanol at room temperature, then adding a surfactant, and stirring to obtain a solution; adding a precursor to the solution, stirring, transferring to a stainless steel autoclave, then sealing the autoclave, placing in a blast oven, carrying out an amination reaction between ammonia gas generated in the reaction between urea and ethanol and the precursor, after the reaction is finished, naturally precipitating, separating out a solid product, repeatedly and alternately washing the solid product with ultrapure water and absolute ethanol for multiple times, and drying to obtain amino-containing energetic material graded microspheres. The prepared graded microspheres are uniform in size and single in morphology and have the diameter of 10-150 mu m; the product yield generally reaches more than 70%; and the method has the advantages of mild reaction conditions, high yield, easiness in industrialization, low cost and easiness in product size and morphology control, and is suitable for organic low-molecular-weight substances.

The invention discloses a cobalt ion doped carbon nitride hollow quadrangular prism and a preparation method thereof. The side length of the outer side wall of the bottom surface of the hollow quadrangular prism is 300 to 400 nm; the edge length of the hollow quadrangular prism is 4 to 10 [mu]m; and the wall thickness of the hollow quadrangular prism is 20 to 50 nanometers. According to the invention, through two processes of crystallization and calcination, uniform doping of cobalt ions and formation of the morphology of the hollow quadrangular prism are realized. By utilizing the self-crystallization process of a crystal, the preparation method provided by the invention can improve the purity of raw materials, realizes uniform doping of the cobalt ions, and has the advantages of simple preparation process, good repeatability, high yield and universality. A product obtained by calcination has the morphology of the hollow quadrangular prism; and the morphology is novel and special, hashigher specific surface area compared with a traditional bulk morphology, and has great application prospects in the fields of photocatalytic degradation of organic compounds, hydrogen production byphotocatalysis, energy materials, analytical chemistry, etc. Meanwhile, the cobalt ions are uniformly distributed in a C3N4 azine ring network and are insusceptible to oxidization, so formation of oxide/carbon nitride heterojunction due to oxidation of the cobalt ions can be effectively avoided.

The invention provides a preparation method for a FePt/graphene composite nano-material. The method comprises the following steps: dispersing graphite oxide in glycol and carrying out ultrasonic treatment so as to obtain solution A; dissolving ferric acetylacetonate in the solution A under stirring and carrying out ultrasonic treatment so as to obtain solution B; dissolving platinum acetylacetonate in glycol under stirring so as to obtain solution C; adding the solution C into the solution B drop by drop and carrying out ultrasonic treatment so as to obtain solution D, adding 1,2-hexadecanediol into the solution D, wherein a mol ratio of 1,2-hexadecanediol to ferric acetylacetone or platinum acetylacetonate is 3:1, blowing in nitrogen and carrying out a reflux reaction at a temperature of 197 DEG C for 3 hours; and centrifuging, rinsing and drying an obtained product so as to obtain the FePt/graphene composite nano-material. According to the invention, the FePt/graphene composite nano-material is synthesized in one step by using the method of coreduction of ferric acetylacetonate, platinum acetylacetonate and graphite oxide in a glycol solution, usage of surfactant is avoided, and the purity of the material is improved; and the one-step synthesis method is simple, is easy to operate and has a good development prospect.

The invention discloses a preparation method for a high-strength three-dimensional hollow hydrogel structural body. The method comprises the following steps: designing a corresponding solid element model according to the characteristic requirements of a hydrogel structural body; mixing a metal catalyst into a thermoplastic polymer or a light-curable resin material; printing a three-dimensional polymer structural body containing the metal catalyst through a 3D printer; soaking the polymer structural body into a hydrogel monomer solution, carrying out surface initiated polymerization, and allowing the surface of the polymer structural body to be able to grow a thickness-controllable hydrogel film in situ; soaking the polymer structural body with a gel layer into an ion solution, and carryingout network strength reinforcement; and removing the polymer structural body so as to be able to obtain a high-strength three-dimensional hollow hydrogel structural body similar to a design model. According to the invention, through modeling with computer software, and by relying on a high-precision 3D printing technical platform, a three-dimensional hollow hydrogel structural body material withan arbitrary shape and size can be prepared.