4376results about How to "Easy to realize industrial production" patented technology

The invention provides a preparation method of graphene, and particularly relates to a method for preparing biomass graphene employing cellulose as a raw material. The specific preparation method comprises the following steps: 1, preparing a catalyst solution; 2, carrying out ionic coordination and high-temperature deoxidization on cellulose and a catalyst, so as to obtain a precursor; 3, carrying out thermal treatment; 4, carrying out acid treatment, and drying to obtain the graphene, wherein the prepared graphene is uniform in morphology, has a single-layer or multi-layer two-dimensional layered structure; the dimension is 0.5-2 microns; and the electrical conductivity is 25,000-45,000S/m. The preparation method is simple in preparation technology, low in cost, high in yield, high in production safety, and controllable in product dimension and physical property; industrialized production can be realized; the graphene prepared by the method can be applied to electrode materials of super capacitors and lithium ion batteries, and can also be added to resin and rubber as an additive; and the physical property of the material can be improved.

The invention discloses a method for preparing a nitrogen-doped graphene material with a hydrothermal process, relating to a method for preparing the nitrogen-doped graphene material. The technical problems of lower nitrogen content, difficulty in control of nitrogen content, high production cost, complex structure of equipment required by reaction, rigorous reaction conditions, low yield, difficulty in industrialized production and the like in the traditional method for preparing the nitrogen-doped graphene material are solved in the invention. The method comprises the steps of: 1, dissolving graphite oxide in a solvent, adding a surfactant and uniformly mixing; 2, adding a nitrogen-containing compound, and uniformly mixing; and 3, after a hydro-thermal reaction, washing and drying to obtain the nitrogen-doped graphene material. The nitrogen-doped graphene material prepared in the invention has the advantages of higher nitrogen content, controllable nitrogen content, low production cost, simple structure of required equipment, high yield and easiness in realizing industrialized production.

The invention relates to a method for recycling valuable metal from a waste nickel-cobalt-manganese lithium ion battery. The method comprises the following steps of: dismounting, discharging and crushing the battery, soaking crushed waste nickel-cobalt-manganese lithium ions into sulfuric acid with certain concentration, adding a reducing agent to strip positive and negative pole pieces, and leaching valuable metals of nickel, cobalt, manganese and lithium; and replacing leach liquor with iron powder to remove copper, carrying out hydrolyzing to remove iron and aluminum, and dosing an impurity-removed solution to synthesize an aluminum coated nickel, cobalt and manganese ternary positive electrode material precursor, evaporating and concentrating the synthesized solution, adding carbonateor introducing carbon dioxide to recycle lithium. According to the method disclosed by the invention, stripping and leaching are synchronously completed, chemical precipitation is performed to removecopper, iron and aluminum, slag amount is small, slag filter performances are good, and the impurity-removed solution is used for synthesizing the aluminum coated nickel, cobalt and manganese ternaryprecursor, so that the recovery rate of valuable metal is increased; and the recovery rate for nickel, cobalt and manganese is 96% or higher in the whole process, the total recovery rate of lithium is90% or higher, the technological process is short, operation is simple, equipment is less, and the cost is low.

The invention discloses a preparation method of a graphene/polymer nano composite material, which is characterized by comprising the following steps: adding 0.1-30 parts by weight of graphite oxide into 10-3000 parts by weight of water, and dispersing and exfoliating by carrying out ultrasonic dispersion (the power is 50-500W, and the frequency is 10-100000Hz) at 10-100 DEG C for 15 minutes-5 hours or mechanical lapping for 15 minutes-5 hours or mechanical stirring for 1-48 hours to obtain a graphene oxide water solution; adding the graphene oxide water solution into 100 parts by weight of polymer emulsion of which the solid content is 10-70%; continuing the ultrasonic or mechanical stirring to carry out uniform mixing; demulsifying by adding 1-100 parts by weight of 5-100% demulsifier toobtain a graphene oxide/polymer granular suspension; adding 0.1-100 parts by weight of reducer into the graphene oxide/polymer granular suspension, reducing at 20-100 DEG C for 1-72 hours, filtering,and drying in a drying oven at 20-100 DEG C for 2-72 hours or drying in a vacuum drying oven at 20-120 DEG C under a vacuum degree of 0.1-0.01 MPa for 2-48 hours, thereby obtaining the graphene/polymer nano composite material.

The invention discloses super-hydrophobic and super-oleophobic surface preparation technology. In the preparation technology, aluminum or aluminum alloy sheets are subjected to two-step electrochemical treatment, and then are modified by using perfluorinated octadecyl trichlorosilane or perfluorinated polymethacrylate to prepare the super-hydrophobic and super-oleophobic surface. The surface has super-hydrophobic property on aqueous solution of which the pH value is between 1 and 14 and super-oleophobic property on various oil drops, wherein a contact angle of the surface on water is 171 degrees, and a rolling angle is less than 1 degree; the surface expresses the super-oleophobic property on various oil drops except for perfluorinated polymer liquid, and all contact angles between the oil drops and the surface are more than 150 degrees, and rolling angles are generally less than 10 degrees; and the surface can also be put in air for a long time and can still maintain the super-hydrophobic property and super-oleophobic property.

The invention discloses a self-crosslinking antibacterial hydrogel material containing carboxymethyl chitosan/oxidized sodium alginate. The material is made from the following components by mass percent: 1-35% of carboxymethyl chitosan, 1-25% of oxidized sodium alginate, 0.01-0.5% of nano-silver and distilled water. The material is prepared by the following steps: preparing the carboxymethyl chitosan by a carboxymethylation reaction of chitosan at the temperature of 10-80 DEG C; preparing the oxidized sodium alginate by an oxidation reaction of sodium alginate at the temperature of 10-45 DEG C; respectively preparing aqueous solution of the carboxymethyl chitosan and aqueous solution of the oxidized sodium alginate; adding the nano-silver solution and blending at certain ratio; and allowing self-crosslinking of the components at the temperature of 10-50 DEG C to produce the antibacterial hydrogel material. The antibacterial hydrogel material has the advantages of low cost, environmental protection, simple process and the like; as the carboxymethyl chitosan has good biocompatibility, the oxidized sodium alginate is nontoxic to human body, and the nano-silver has excellent antibacterial property, the obtained material can be applied to wound dressing, hemostatic materials and the like.

The invention discloses low-cost green cellulose aerogel and a preparation method for hybrid aerogel thereof. The preparation method for the hybrid aerogel of the cellulose aerogel comprises the following steps that cellulose is dissolved into a zinc chloride aqueous solution, centrifugal deaeration is performed, and a uniform and transparent cellulose solution is obtained; the cellulose solution is formed, then the formed cellulose solution is placed into a coagulating bath to be regenerated, in addition, the regenerated cellulose solution is fully washed by use of a solvent, and cellulose solvent gel is obtained; the solvent in the cellulose solvent gel is removed by use of supercritical carbon dioxide drying or freeze drying, and the cellulose aerogel is obtained. Functional filler can be added into the cellulose solution to obtain the hybrid aerogel. By the adoption of different solution forming methods, the cellulose aerogel and the hybrid aerogel thereof in the shapes of sheets, fibers, particles and the like can be prepared. The preparation method is low in cost and is environmentally friendly, and the prepared aerogel is provided with a uniform nano-grade net porous structure.

The invention relates to a preparation method of a star polycarboxylic acid high-performance water reducing agent. Polybasic alcohol and (methyl) acrylic acid used as main raw materials for esterification are esterified and polymerized to prepare the star polycarboxylic acid high-performance water reducing agent material: the (methyl) acrylic acid and polybasic alcohol used as reactants are esterified under the action of a catalyst to firstly prepare a star polymerizable active terminal, and free-radical polymerization reaction is carried out with unsaturated polyethenoxy ether, molecular weight regulator and unsaturated carboxylic acid monomer under the action of an initiator to prepare the star polycarboxylic acid high-performance water reducing agent. The invention is easy to control, and has the advantages of high polymerization degree, low cost and no pollution; the esterification reaction is carried out form an active core, and the free-radical polymerization is carried out to generate the chain arm, thereby implementing the polycarboxylic acid high-performance water reducing agent in a star molecular structure; and under the condition of common doping amount and low doping amount, the star polycarboxylic acid high-performance water reducing agent has better cement paste flowability and holding capacity than the traditional linear and comb polycarboxylic acid water reducing agents, and has favorable cement adaptability and concrete application performance.

The invention discloses a method for preparing a TiO2/g-C3N4 composite visible light catalyst. The method comprises the following steps: firstly, uniformly dispersing a titanium source and a nitrogen source in ethanol, and subsequently dropping water into ethanol so as to obtain a mixed material; evaporating to dry the mixed material in a stirring state so as to obtain a precursor; transferring the prepared precursor to a muffle furnace, and calcining for 0.5-12 hours at 300-800 DEG C in the muffle furnace, thereby obtaining the TiO2/g-C3N4 composite visible light catalyst. The TiO2/g-C3N4 composite visible light catalyst can be prepared while TiO2 and g-C3N4 are prepared, and the synthesis of the two compounds TiO2 and g-C3N4 and the preparation of the composite visible light catalyst are achieved at one step; the process is simple, and industrialization production is easy to achieve. The composite visible light catalyst disclosed by the invention is rich in photocatalytic activity center, relatively high in both light absorption rate and photocatalytic activity, and relatively high in photocatalytic degradation rate of organisms.

The invention relates to a hydroxyl oxidize iron-nickel-iron hydrotalcite integrated oxygen evolution electrode applicable to alkaline mediums and a preparation method and application thereof. The electrode is applicable to the oxygen evolution reaction in the water-electrolytic hydrogen making process under catalytic alkaline conditions. The hydroxyl oxidize iron-nickel-iron hydrotalcite integrated oxygen evolution electrode and the preparation method and application thereof have the advantages as follows: the nickel-iron hydroxide integrated electrode is shape-controlled, the preparation process is simple and under mild conditions, and the electrode can be used for a water electrolytic tank for hydrogen production from water splitting under external bias potentials; the prepared hydroxyloxidize iron-nickel-iron hydrotalcite integrated oxygen evolution electrode further has a better performance when being used in an alkaline solid polymer electrolyte (AEM) water electrolytic tank; and besides, an extensive utilization value in achieved in regenerative fuel cells (RFC), photoelectro-catalytic devices and electrolytic hydrogen generators.

The invention discloses a surface-modified lithium cobaltate material and a preparation method thereof. The lithium cobaltate material comprises a core particle and a surface-modified layer coating the core particle, wherein the core particle is a lithium cobaltate-based positive material with a structural formula as follows: LixCo(1-y)MyO2, wherein x is greater than 1 and not greater than 1.2, y is not less than 0 and not greater than 0.1, M is a doping element; the surface-modified layer comprises a Li<+1> conducting layer and an electrolyte isolating layer; the core particle is coated by the Li<+1> conducting layer and the electrolyte isolating layer in sequence. According to the invention, by sufficiently utilizing dynamic characteristic that different substances react with residual Li salt on the surface of the lithium cobaltate, and characteristic of final reaction product performance, the lithium cobaltate material with double coating layers is prepared. The material is high in comprehensive performances, has high discharge capacity, high cycling stability and the like. The preparation method disclosed by the invention is simple in process and easily realizes industrial production.

The invention provides a method for preparing an SiO2/TiO2 hollow microsphere by a sol-gel method. The method is mainly characterized in that cation polystyrene microsphere (PS) is used as a formwork; ethyl silicate and butyl titanate are respectively used as raw material and diluted ammonia is taken as regulator of pH value; a multi-layer organic-inorganic hybrid composite microsphere is obtained by the sol-gel reaction under the temperature of 70-80 DEG C. Formwork particle of the obtained deposition is removed by a calcining process to obtain the SiO2/ TiO2 hollow microsphere. By changing the consistency of reactant, content of surfactant and calcining temperature, the SiO2/ TiO2 hollow microsphere with different spherical shell thickness, density and grain size can be obtained. The hollow microsphere prepared by the method has high photo-catalytic activity, overcomes the shortage that existing preparation method of hollow microsphere can only prepare single shell layer microsphere; the multi-layer hollow microsphere can be prepared, the technique is simple, the cost is low and the preparation method of the invention is suitable for industrialized production.

The invention discloses a preparation method of a sulfur-active carbon/graphene composite material. The preparation method comprises the following steps of (1) pre-processing a biomass raw material; (2) mixing the pre-processed biomass raw material, graphene and an activating agent to form a solid mixed material; (3) performing activation, washing, solid-liquid separation and drying on the solid mixed material to obtain an active carbon/graphene composite material; and (4) combining the active carbon/graphene composite material with sulfur to obtain the sulfur-active carbon/graphene composite material. The composite material provided by the invention has the advantages of simple preparation process step, high efficiency and low energy consumption, and production on a large scale can be achieved.

A method for preparing a graphene oxide/white carbon black/rubber nanocomposite by mechanical blending belongs to the composite material field. In the graphene oxide/white carbon black/rubber composite prepared by the method provided by the invention, because graphene and white carbon black are inserted with each other, the self-aggregation of the two fillers is effectively suppressed, and thus a composite having high dispersion, high stripping and nanoscale dispersion is obtained. Not only while the composite has higher modulus and lower rolling resistance, but also the wear resistance of a rubber material is substantially improved, and the modulus and tear resistance of the composite are further improved; at the same time, because of the lamellar structure and good self-recovery capability of the graphene oxide, the rubber material is also imparted with good gas barrier performance and self-healing capability, and the nanocomposite has the incomparable advantages to any traditional fillers. The method provided by the invention is simple and easy to implement, low in cost and easy to industrialize, has wide suitability and better economic benefits and social benefits.

The invention discloses a pyridine saline gas transmission pipeline drag reduction agent and a preparation method thereof. The pyridine saline gas transmission pipeline drag reduction agent is prepared from pyridines compounds, fluo phosphate, and halogenated hydrocarbon according to the mol ratio of 1:1:1-1.5:2:1. The preparation method comprises the following steps: adding the pyridines compounds and the halogenated hydrocarbon of the proportional quantities into a reaction vessel, and under the condition of stirring the mixture in the inert atmosphere, controlling the reaction temperature and reflux for reaction; after the reaction is finished, stopping heating, and cooling the reaction mixture, wherein the upper layer of the reaction mixture is yellowish liquid, and the lower layer of the reaction mixture is a white crystal; in the inert atmosphere, pouring out the yellowish liquid on the upper layer, and crashing the white crystal for suction filtration; putting the white crystal into a heat insulating purifier, adding a solvent into the heat insulating purifier, and in the inert atmosphere, re-crystallizing the mixture for 2-3 times to obtain a white crystal; adding an organic solvent, the white crystal and the fluo phosphate in a certain proportion into the reaction vessel, stirring the mixture in the inert atmosphere, and controlling the temperature for reaction; after the reaction is finished, carrying out suction filtration on the liquid rapidly, and removing undissolved substances to obtain a crude product containing the solvent; and steaming a small amount of the organic solvent from the crude product by a rotary evaporator, then putting the crude product in a vacuum oven to make the organic solvent steamed radically, and obtaining a product.

The present invention provides poly vinyl alcohol polar foam. Water is used as foamer and plasticizer. According to weight, water is 15 portion to 55 portion, and poly vinyl alcohol is 45 portion to 85 portion. The material are dissolved for expansion, melted and processed for foaming. The melting and processing foaming comprises a melting and extruding continuous foaming method and a molding foaming method. The poly vinyl alcohol polar foam is a plate material, sheet material, membrane or bead or square block. The poly vinyl alcohol polar foam of the present invention can be added with crosslinker, molecular composite agent, processing aid, nucleating agent and functional additive. According to the weight portion, the crosslinker is 0 portion to 2 portion, the molecular composite agent 0 portion to 10 portion, the processing aid 0 portion to 10 portion, the nucleating agent 0 portion to 5 portion and the functional additive 0 portion to 30 portion. When the poly vinyl alcohol polar foam of the present invention is used as heavy metal particles, adsorption, filtration and separation material of organic pollutant, the poly vinyl alcohol polar foam has the characteristics of rapid adsorption, easy desorption and capacity of being repeatedly washed.

The invention provides a process for preparing a new plastic, which comprises the following steps: (1) preparing raw materials; (2) weighing and proportioning the raw materials; (3) mixing PVC powder, stabilizers, packing, plasticizers and other additives, then carrying out high-speed kneading on the obtained mixture, and preplasticizing the mixture so as to obtain a pre-plasticized mixture; (4) mixing the pre-plasticized mixture with TPU particles, carrying out banbury mixing on the obtained mixture under the condition of gradient temperature control so as to obtain colloidal products; (5) carrying out double-screw granulation on the obtained colloidal products; and (6) carrying out sorting, dehydration and packing on the granular products obtained in step 5 so as to obtain the new plastic. The process is simple, the conditions of the process are easy to control, and the process is suitable for large-scale production. The invention also provides a new plastic, which has the characteristics of high resistance to wear and scrape, high elasticity, easy recovery, high flame retardance, ultraviolet resistance, freezing damage (caused by low temperature in the north) resistance, environmental protection, soft handfeel and stick resistance, and the like; and the new plastic can be applicable to wire and cable compound.

The invention discloses a method for preparing spherical active carbon employing water soluble bitumen. The method comprises the following processes: washing commercial sulfonated asphalt to obtain a complete water-soluble material; preparing a bituminous solution from the obtained water-soluble material or water-soluble mesophase pitch and deionized water; carrying out spray granulation on the bituminous solution, so as to obtain a bituminous ball; carbonizing and activating the bituminous ball, so as to obtain the spherical active carbon. The method has the advantages that the commercial sulfonated asphalt and the water-soluble mesophase pitch are adopted, so that the spherical active carbon is low in price and wide in source, no organic solvent is added in the balling process, the bituminous ball is controllable in particle size distribution, the prepared spherical active carbon is large in specific surface area, and industrial production is easy to achieve.

The invention discloses sulfuric acid ester gas pipeline drag reduction agents for drag reduction of long-distance pipelines of gas, particularly natural gas and a preparation method thereof. The drag reduction agents are formed by sulfuric acid esters, aromatic compounds and heterocyclic compounds according to the molar ratio of 1:5:1-1.5:10:1. The preparation method comprises the steps of: 1) adding a heterocyclic compound and an aromatic compound with certain proportion into a reactor, adding nitrogen for protection, and stirring for fixed time period at low temperature, and then adding sulfuric acid ester; 2) reacting for certain time to ensure that a formed liquid is changed into opacity and layering from initial lucidity and transparency; 3) using extraction layering to separate a residual liquid and a generated sulfuric acid ester drag reduction agent; and 4) distilling a residual liquid of an organic solvent under reduced pressure to obtain a product in vacuum. The drag reduction agents have obvious effect on the drag reduction of gas pipelines, have the advantages of direct raw material sources, simple operation, mild reaction conditions, relatively simple process and low requirement on equipment, and are easy to realize mass industrialized production.

The invention discloses a method for preparing a fibroin nanofiber and metal organic framework composite film. The method includes: vertically immersing a fibroin nanofiber film into first ligand solution which contains metal ions; then adding second ligand solution, and enabling the fibroin nanofiber film and the two ligand solutions to react for specific time at a specific temperature so as to enable a metal organic framework substance to grow on the surface of the fibroin nanofiber film, so that the composite film is formed; taking out the composite film, washing with deionized water, and drying to obtain the film. By adoption of the method, problems of nonuniformity in nucleating and poor processability in a metal organic frame film preparation process are solved, the film has advantages of simplicity in preparation, high filter efficiency, high capacity, particle uniformity, high stability, high film continuity and the like, the adsorption performance is improved, and adsorption of various organic and inorganic substances and wide application are realized.