438results about How to "Suitable for industrial production applications" patented technology

The invention discloses a preparation method of boron modified phenolic resin, which comprises the following steps that: (1) phenol and formaldehyde in the molar ratio of 1.0:0.1 to 1.0 is added into a reactor, to be stirred under acid environment and reflux for 5 to 6 hours; (2) a reaction product prepared in step (1) is distilled and hydrated at normal pressure, until the water content is less than 10 weight percent; (3) the produce dehydrated in step (2) is added with a compound which contains boron hydroxyl, to have esterification; and the input of the compound which contains boron hydroxyl is 20 weight percent of that of the phenol at most. The synthesis method provided by the invention is simple and feasible, the prepared resin has stable performance and is beneficial to large-scaleindustrial production, and the prepared boron modified phenolic resin has excellent thermal oxidation and ablation resistant performance, and can be widely applied to high-temperature brake materials, ablation resistant materials, heat insulation materials and other fields.

The invention belongs to the technical field of lithium-ion secondary batteries and in particular relates to a method for preparing a lithium-ion secondary battery pole piece. Poriness of a film piece is gradually increased from the direction close to the surface of a current collector to the direction far away from the surface of the current collector. The method comprises the following steps of: coating a sizing agent containing an active substance, a conductive agent, a polymer binding agent and a disperse solvent on the current collector to obtain a film piece containing the disperse solvent; and spraying nonsolvent to the surface of the film piece containing the current collector by adopting an ultrasonic spray method and drying and rolling the film piece to obtain the pole piece. Compared with the prior art, the thick pole piece prepared by the method has continuous gradient distribution poriness so that a battery assembled by the thick pole piece prepared by the method has higher energy density and good electrochemical performance. The capacity play is normal, the rate performance is obviously improved, the analysis lithium condition is obviously improved, and the cycling stability is also improved obviously.

The invention provides a preparation method of a lithium-selenium battery. The preparation method comprises the steps of providing an oxidized graphene dispersing liquid with saturated inert atmosphere; feeding hydrogen selenide gas to the oxidized graphene dispersing liquid with saturated inert atmosphere, reducing the oxidized graphene to graphene by taking the insert atmosphere as carrier gas, and meanwhile, generating elemental selenium on the surface of the graphene to obtain an elemental selenium-graphene dispersing liquid; performing solvent thermal treatment on the selenium-loaded graphene dispersing liquid to obtain graphene-based gel; and drying the graphene-based gel. The invention further provides a lithium-selenium battery positive electrode material and a lithium-selenium battery using the positive electrode material.

The invention relates to a spinel type high-entropy oxide electrode material and a preparation method thereof, and belongs to the field of nanomaterial preparation and new energy. The chemical formulaof the high-entropy oxide electrode material is one of (FeCoNiCrMn)O, (FeZnNiCrMn)O, (FeCoZnCrMn)O and (FeCoNiCrMnCu)O. The preparation method includes the steps of 1) mixing and ball-milling iron oxide, chromium oxide, manganese oxide and M metal oxide, wherein the M metal oxide is two or more of nickel oxide, zinc oxide, copper oxide and cobalt oxide; and 2) carrying out high-temperature calcination, and obtaining the spinel type high-entropy oxide electrode material by adopting a cooling mode of furnace cooling, air quenching and liquid nitrogen quenching. The particle diameter of the high-entropy oxide is 100-500nm, and the high-entropy oxide is determined to be in a spinel structure according to XRD; and the space group of the material is Fd-3m, and the specific surface area is 5-100m<2>g<-1>.

The invention discloses a method for preparing hydroxypropyl-beta-cyclodextrin, which comprises the steps of etherification, neutralization, decoloring, nanofiltration, resin purification, and spray drying. The method of the invention is small in pollution, and the yield in weight is more than 80 percent; meanwhile, the product prepared by using the method of the invention is narrow in substituted ratio range and low in impurity content, and can be used as a pharmaceutic adjuvant.

The invention discloses a method for removing an LED chip electrode, which comprises the following steps of: removing a protective layer covered on the edge of the LED chip electrode; immersing the chip in chrome etching liquid after the protective layer is removed; taking the immersed chip out, washing and drying by air; and adhering a blue membrane or a white membrane on the surface of the air dried chip and then peeling the blue membrane or the white membrane off. The method provided by the invention has very high selectivity, exerts no influences on the other parts of the LED chip structure and retains the conventional indium tin oxide (ITO) layer.

The present invention discloses a method of extracting flavone and polyoses from mulberry leaves, including air drying, grinding and screening. Mulberry leaf powder is immersed in 60 to 80 percent ethanol so as to extract flavone or in water so as to extract polyoses; the ultrasonic treatment with 100 to 400W power lasts for 5 to 25 minutes; extraction temperature is controlled within 60 to 85 DEG C and the extraction lasts for 1 to 2 hours; the extracting solution is centrifugalized and filtered by supernatant fluid, thus obtaining the filtrate; the flavone filtrate is concentrated so as to obtain the mulberry leaf flavone extract; or ethanol is added into the polyoses filtrate so as to make the ethanol concentration up to 70 percent in the final solution; the filtrate is placed for 18 to 24 hours under 4 to 10 DEG C, then deposited and dried, thus obtaining the mulberry leaf polyoses. The flavone yield can reach more than 25mg/g and the polyoses yield 110mg/g. The present invention, with the advantages of good repeatability, high selection, short operating time, less solvent consumption, high yield of effective ingredients, no noise, no pollution and relatively good application prospective, is applicable to industrial production.

The invention provides a preparation method and an application of Beta-cyclodextrin grafted carbon nano tube adsorbing material and belongs to the technical field of novel nano material and environmental protection. In order to solve the problem that the carbon nano tube is easy to aggregate and is poor in dispersivity, the invention adopts cheap and degradable amphipathic supramolecular Beta-cyclodextrin to synthesize Beta-cyclodextrin grafted carbon nano tube (CNTs-Beta-CD) composite efficient adsorbing material which has an excellent effect on removing heavy metal ions in waste water. The method has the advantages of simple preparation technology, mild conditions, no pollution, low cost, environment-friendliness, and high efficiency, and is suitable for industrial production and application.

The invention discloses a method and system for recovering lithium from a waste lithium iron phosphate battery. The method comprises the following steps that a positive plate is disassembled from thewaste lithium iron phosphate battery; a binder in the positive plate is removed, valuable metal elements in the positive plate are leached by an acid solution, and an acidified leaching solution is obtained; ultrafiltration treatment is carried out on the acidified leachate by using an ultrafiltration membrane; by using a nanofiltration membrane technology, lithium ions in the acidified leachate are separated from other cations different from lithium ions, a solution containing lithium and a solution containing other cations are obtained, and then a reverse osmosis technology is adopted for concentration and enrichment correspondingly, wherein the other cations comprise iron ions; and a lithium precipitant is adopted to precipitate and separate lithium ions in the lithium-containing solution, alkaline substances are adopted to precipitate and separate iron ions in the solution containing other cations, and lithium recovery is realized. According to the method and system, the ultrafiltration-nanofiltration-reverse-osmosis combined technology is adopted, and the method and system have the beneficial effects of simple process, environmental protection, less acid and alkali consumption, good and stable membrane separation effect and the like.

The invention provides a preparation method of a two-dimensional/one-dimensional heterogeneous nanochannel film. The method is characterized by comprising the following steps that step 1, graphene oxide is dissolved in an aqueous piperazine solution, and ultrasonic treatment is performed at the room temperature to obtain a uniformly dispersed first solution; step 2, the first solution is added dropwise to the upper layer of a porous aluminum oxide film, and after the solvent is evaporated at the room temperature, a first composite film with a graphene oxide film layer and a porous aluminum oxide film layer is obtained; step 3, a benzenetricarbonyl trichloride solution is added dropwise to the upper surface of the graphene oxide film layer of the first composite film, and drying is carriedout to obtain the two-dimensional/one-dimensional heterogeneous nanochannel film. The invention provides the two-dimensional/one-dimensional heterogeneous nanochannel film prepared by using the methodand application of the two-dimensional/one-dimensional heterogeneous nanochannel film in salt difference energy conversion.

The invention belongs to the field of catalyst materials and forming methods thereof, and concretely relates to a honeycombed catalyst material and an extrusion forming method thereof. The invention discloses the honeycombed catalyst material and the forming method thereof, and discloses the optimal content, the optimal ingredients and the optimal matching ratio of the honeycombed catalyst material and the preparation forming method thereof at the same time. A result shows that the honeycombed catalyst material has high catalytic efficiency on harmful gases such as formaldehyde and methylbenzene.

The invention discloses a method and system for recovering lithium and manganese from a waste lithium manganate battery. The method comprises the following steps that a positive plate is disassembledfrom the waste lithium manganate battery; a binder in the positive plate is removed, valuable metal elements in the positive plate are leached by acid dissolution, and acidified leachate is obtained;ultrafiltration treatment is carried out on the acidified leachate by using an ultrafiltration membrane; by using a nanofiltration membrane technology, lithium ions in the acidified leachate are separated from other cations different from lithium ions, a solution containing lithium and a solution containing other cations are obtained, and then a reverse osmosis technology is adopted for concentration and enrichment correspondingly, wherein the other cations comprise manganese ions; and a lithium precipitant is adopted to precipitate and separate lithium ions in the lithium-containing solution,and alkaline substances are adopted to precipitate and separate manganese ions in the solution containing other cations, so that the recovery of lithium and manganese is realized. According to the method and system, the ultrafiltration-nanofiltration-reverse osmosis combined technology is adopted, and the method and system have the beneficial effects of simple process, environmental protection, less acid and alkali consumption, good and stable membrane separation effect and the like.

The invention relates to a preparation method of a general purpose pitch-based carbon fiber. The preparation method has the beneficial effects that isotropic pitch with high softening point and excellent spinnability is obtained through the comprehensive treatment technologies such as heat treatment, heat filtration, reduced pressure distillation, oxidation treatment and modification with an additive and then the general purpose pitch-based carbon fiber is prepared through melt spinning, non-melting treatment and carbonization treatment; the pitch blended by the method is low in heteroatom content, narrow in molecular weight distribution and high in carbon content, contains defined amount of short alkyl side chains and can solve the technical problems that the melt spinning materials are brittle and are not easy to operate and non-melting treatment costs long time; the carbon fiber prepared by the method has good quality, high strength and good continuity; and the preparation method is simple in process, mild in reaction conditions and low in environmental pollution and is applicable to industrial production.

The invention relates to a surface-coated positive electrode material and a preparation method and application thereof. The surface-coated positive electrode material comprises a substrate and a coating layer covering the substrate, wherein the substrate is a positive electrode material, and the composition of the coating layer contains aluminum metaphosphate. The surface-coated positive electrodematerial adopts aluminum metaphosphate to form the coating layer, so that the cycle performance of the positive electrode material of a lithium-ion battery, especially the high-temperature cycle performance can be effectively improved.

The invention discloses a preparation method of a multi-layer coated pole piece, which comprises the following steps: in the process of preparing a lithium ion battery pole piece, preparing slurry 1,slurry 2 and slurry 3 of which the active substance content is gradually reduced and the binder content and the conductive agent content are gradually increased from an active substance, a conductiveagent, a binder and a dispersing solvent according to different proportions; and sequentially coating the slurry 1, the slurry 2 and the slurry 3 on the surface of a current collector, rolling and drying to obtain the pole piece. According to the pole piece prepared by the method, the active substance, the binder and the conductive additive are distributed in a gradient manner from the inner sideof the pole piece to the outer side of the pole piece, so that the purposes that the porosity of the pole piece is gradually reduced from inside to outside and the electronic conductivity is graduallyincreased are achieved. The pole piece prepared by the method can balance electron and ion conductivity and reduce concentration polarization and non-uniformity of electrochemical reaction rate, so that the pole piece has both high energy density and good electrochemical performance. The preparation method is simple and easy to implement, low in manufacturing cost and suitable for industrial production and application.

The invention discloses a nitrogen-doped carbon-coated silicon nanoparticle composite material and a preparation method thereof. The preparation method comprises the following steps that: S1: puttinga silicon nanoparticle of which the grain diameter is 30-50nm in Tris-HCl buffer solution of which the pH (Potential of Hydrogen) is 7.5, cleaning, and drying to obtain processed silicon nanoparticles; S2: adding dopamine hydrochloride into Tris-HCl buffer solution of which the pH is 8.5, and dissolving to obtain dopamine solution; S3: adding the silicon nanoparticle processed in S1 into the dopamine solution obtained in S2, evenly dispersing, carrying out stirring reaction at the room temperature for 1-8 days, and carrying out separation and drying to obtain reactant; and S4: under an inert atmosphere, calcinating the reactant obtained in S3 at a temperature of 700-900DEG C for 1-2h to obtain a composite material. The invention also discloses the application of the above composite material on a lithium battery negative electrode. The composite material synthesized by the preparation method has excellent cycling stability.

The invention discloses a copper cleaning agent and a preparation method thereof. The copper cleaning agent disclosed by the invention consists of an inorganic acid, an organic acid, a surfactant, a penetrating agent, an emulsifier, a defoaming agent, a complexing agent and water. The inorganic acid and the organic acid are compounded, the hazards to health of cleaning workers caused by individual use of the inorganic acid in the traditional cleaning agent are avoided, over etching of a copper workpiece is also avoided, the copper cleaning agent is an environmental-friendly cleaning agent and has a certain oiliness, an effect of cleaning dirt such as oil attached to the surface of a copper part is improved by using the cleaning agent, the cleaning agent solution is acidic, and the oxide skin on the surface of the copper part can be well removed. The cleaning agent prepared by the invention is simple in using method, the copper part only needs to be soaked at normal temperature for 2-5 minutes so as to be cleaned, no greasy dirt residue is left on the cleaned copper part, the color of the surface of the copper part is the copper base color, and the cleaning effect is obvious. The copper cleaning agent disclosed by the invention is simple in preparation method, low in cost and obvious in effect and is suitable for industrial production and application.

The invention discloses a preparation method of a phosphorus-silicon compound which is shown in the general formula (1) disclosed in the specification. The method comprises: phosphate and chlorosilane are utilized to be subjected to direct polycondensation at the atmospheric pressure in one step so as to obtain the target product with high yield. By adjusting the molar ratio of the phosphate to the chlorosilane, the degree of polymerization of the product can be controlled. The phosphorus-silicon compound can be used as a fire retardant and used in macromolecular materials such as plastics and rubbers. In the formula (1), R1 represents C1-C4 alkyl; R2 represents C1-C4 alkyl, C1-C4 alkoxy or H; R3 represents C1-C4 alkyl or aryl; and n represents an integer within a range of 2-2000.

The invention discloses a nylon fabric dyeing technology. The technology adopts a process flow comprising the steps of blank pretreatment, presetting, jet dyeing, water washing, color fixation, water washing and air drying, the water washing and the high-temperature presetting treatments before dyeing make creases and wrinkles be difficultly formed in the dyeing process to obtain a special wrinkle effect, and the adoption of a jet dyeing machine for dying and the change cooperation addition of an assistant, a dye and the temperature effectively avoid variegation and color wrinkle phenomena and make the dyeing uniform and a finished product soft and fluffy, so the technology has a good coloring effect, is suitable for the large-scale industrial production and application, and has an improved market competiveness.

The invention discloses a high-entropy mixed oxide electrode material and a preparing method thereof, which relate to oxide materials and a process for material preparation. The high-entropy mixed oxide electrode material is composed of a metal conductive substrate and an oxide film, wherein the oxide film is of a high-entropy structure and is a high-entropy mixed oxide film formed by ruthenium oxide, manganese oxide, stannic oxide, tantalum oxide, cobalt oxide, zirconium oxide, titanium oxide and antimony oxide. The preparing method includes steps of brush coating, drying, thermal oxidation treatment and cooling. The high-entropy mixed oxide electrode material has high specific capacitance and is suitable for preparing high-performance super-capacitors. In addition, the method for preparing the high-entropy mixed oxide electrode material is simple in process, convenient to operate and suitable for being applied to large-scale production.