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411results about How to "Improve dispersion" patented technology

Method for preparing silicon carbide alloy negative electrode material for lithium ion battery

The invention discloses a method for preparing a silicon carbide alloy negative electrode material for a lithium ion battery; and a technical problem to be solved is to increase the circulation performance and the specific capacity of a silicon carbide composite negative electrode material. The method comprises the following steps of: dispersing nanometer silica powder in an organic solution to form a uniform nanometer silicon suspending liquid, then adding a silane coupling agent to the nanometer silicon suspending liquid, and finally carrying out carbon coating and thermal treatment. Compared with the prior art, the method has the advantages of increasing the dispersiveness of nanometer silicon particles in a silicon carbide composite material and inhibiting the volume effect caused by the conglobation of silicon in a lithium intercalation and deintercalation process by adding the silane coupling agent, thereby increasing the circulation performance and the specific capacity of the silicon carbide composite negative electrode material, wherein the capacity of the silicon carbide composite negative electrode material is larger than 500mAh/g, and the capacity retention rate is above 97% when the silicon carbide composite negative electrode material is circulated for 50 times; and according to the preparing method, the preparation cost is low, the technology is simple and controllable, and the silicon carbide alloy negative electrode materials with different capacities can be easily prepared by adjusting a weight proportion of Si powder, graphite and an organic matter.
Owner:BTR NEW MATERIAL GRP CO LTD

Preparation method of conductive macromolecule non-covalent functionalized graphene modified electrokinetic energy conversion polymer material

InactiveCN105461948AImprove dispersionHigh dielectric constantCvd grapheneUltrasonic assisted
The invention discloses a preparation method of a conductive macromolecule non-covalent functionalized graphene modified electrokinetic energy conversion polymer material. according to the method, conductive macromolecules are non-covalent functionalized onto the surface of nano-graphene; and then, the conductive macromolecule non-covalent functionalized graphene nano-material undergoes ultrasonic-assisted dispersion into an electrokinetic energy conversion polymer solution so as to finally obtain a conductive macromolecule non-covalent functionalized graphene/electrokinetic energy conversion polymer composite material. The electro-stimulate response intelligent polymer composite material obtained by the method has high dielectric constant and high electrodeformation value. When content of poly(3,4-ethylenedioxythiophene): polystyrolsulfon acid non-covalent functionalized graphene nanofiller is 3%, dielectric constant of the modified polyurethane dielectric elastomer intelligent material reaches up to 350 at room temperature and at the frequency of 1000 Hz, dielectric loss is 0.20, and loss modulus is 200 MPa. Under the action of a 32.2 MV/m electric field, electrodeformation value in the thickness direction reaches 162%. Performance of the material provided by the invention is far more excellent than performance of a regular nano-ceramic or nano-conductive filler modified intelligent polymer composite material.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Nano composite cold galvanized coating and preparation method thereof

The invention relates to a nano composite cold galvanized coating and a preparation method thereof and belongs to the field of nano coatings. The nano composite cold galvanized coating is prepared from the following raw materials in parts by weight: 2-25 parts of acrylic resin, 0.1-5 parts of an assistant, 75-98 parts of zinc powder and 1-70 parts of a solvent, wherein the zinc powder is a mixture of micro-scale zinc powder and nano-scale zinc powder modified by a fluorosilane coupling agent, so that the dispersity of the zinc powder is increased; the compatibility with resin is improved; the coat made of the nano composite cold galvanized coating has high hydrophobic property; the water contact angle is greater than or equal to 135 degrees; the porosity of the cold galvanized coating is significantly reduced; the corrosion resistance of the coating is improved; the nano composite cold galvanized coating disclosed by the invention can be widely applied to anti-corrosion engineering with a novel steel structure, old and new hot-dip galvanizing structures and an electric galvanized steel structure; and the difficulty in corrosion maintenance of transmission and substation facilities and substation equipments can be conveniently and rapidly solved.
Owner:HAINAN POWER GRID CO LTD ELECTRIC POWER RES INST +1

Glucolase electrode based on magnetic carbon nano-tube and preparation method thereof

The invention belongs to the field of biological sensor technique, in particular to a glucolase electrode and a preparation method thereof on the basis of a magnetic carbon nano-tube. The preparation method of the invention disperses the carbon nano-tube ultrasonic into a chitosan acid aqueous solution containing ferric ions and ferrous ions so as to prepare the three-composition nanometer magnetic composite material which consists of the carbon nano-tube, ferroferric oxide and chitosan; the three-composition nanometer magnetic composite material is dispersed into glucose oxidase aqueous solution, adsorbs the glucolase and is dispersed into glutaraldehyde aqueous solution; by primary amino-group reaction crosslinking, the glucose oxidase is fixed on the surface of the magnetic composite material, thus obtaining the updatable glucolase electrode based on the magnetic carbon nano-tube; the glucolase electrode provided by the invention has high response speed, wide detection consistency range, simple and convenient electrode processing and simple and convenient preparation of the immobilized enzyme magnetic material; when the enzyme is deactivated, the electrode is regenerated by updating the enzyme material of the electrode surface based on the magnetic carbon nano-tube, therefore, the consumption of the electrode material is greatly reduced, the resource is saved and the cost of enzymatic determination is reduced.
Owner:FUDAN UNIV

Preparation method and application of magnetic graphene oxide adsorbent material

The invention discloses a preparation method and application of a magnetic graphene oxide adsorbent material. The preparation method comprises the steps that chitosan reacts with ferrous ions and ferric ions to synthesize magnetic chitosan nanoparticles; the magnetic chitosan nanoparticles are subjected to reduction and acidification by carbon disulfide, then connect onto the surface of graphene oxide by an amidation reaction, thus a new magnetic graphene oxide adsorbent material capable of adsorbing metal ions, especially copper ions is obtained. The graphene oxide has unique two-dimension monoatomic layer structures, so that the surface area of the graphene oxide is large, then a large number of oxygen-containing groups distributed on the surface of the graphene oxide are capable of well adsorbing the metal ions in wastewater, and the magnetic chitosan modified by CS2 is added, not only are the adsorbability and the dispersibility in water improved, but also the separation is easier under the action of an applied magnetic field. The defects of low adsorbing capacity, difficult recovery and reuse, long separating time, low adsorption efficiency and the like in a process that a traditional adsorption material adsorbs the copper ions are overcome.
Owner:ANHUI NORMAL UNIV

Clay-resisting slow-release slump-retaining type polycarboxylate superplasticizer and preparation method thereof

InactiveCN109626859AStrong adsorption capacity and dispersion performanceImprove dispersionCarboxylic esterDibasic acid
The invention relates to the technical field of concrete admixtures, in particular to a clay-resisting slow-release slump-retaining type polycarboxylate superplasticizer and a preparation method thereof. With polyether macromonomers, unsaturated carboxylic acid, unsaturated carboxylic ester, dibasic acid anhydride, a crosslinking agent, amide monomers, unsaturated phosphate ester, phosphate, an oxidizing agent , a reducing agent, a chain transfer agent, a neutralizing agent and water as raw materials, the clay-resisting slow-release slump-retaining type polycarboxylate superplasticizer is synthesized at normal temperature. Ester groups, amide groups and phosphate ester are introduced into the molecular structure of the polycarboxylate superplasticizer, and light crosslinking of the polycarboxylate superplasticizer is realized through the long-chain ester crosslinking agent, so that the superplasticizer has a good clay-resisting and slump-retaining effect and has the advantages of low mixing amount, high water reducing rate, high adaptability to clay-containing sand, good slump retaining performance and the like; besides, only normal-temperature polymerization is needed, the processis simple, the production cost is low, and the superplasticizer is suitable for industrial production.
Owner:山西黄河新型化工有限公司

Industrial reaction kettle suitable for feed liquid of chemical industry and medicine

The invention discloses an industrial reaction kettle suitable for feed liquid of chemical industry and medicine. The industrial reaction kettle comprises a reaction kettle body, wherein the reaction kettle body comprises a variable frequency motor, a feeding hole, a speed reducer, a stirring shaft and a base; the variable frequency motor and the feeding hole are respectively arranged and formed above the reaction kettle body; the stirring shaft extends into an inner cavity of the reaction kettle body; an output part of the variable frequency motor is connected with an input end of the speed reducer, and an output end of the speed reducer is connected with the stirring shaft; the end of the stirring shaft is provided with a connecting piece and a fan-shaped stirring wheel; a spiral mixing wheel is arranged at the periphery of the stirring shaft; the stirring shaft is also provided with a connecting rod; two stirring pieces are symmetrically arranged on the connecting rod at left and right; the outer wall of the cavity of the reaction kettle body is provided with an air pump and a liquid collection box; the air pump is connected with a baffle plate by a guide pipe, and the baffle plate is arranged on the inner wall of the cavity of the reaction kettle body; the bottom of the cavity of the reaction kettle body is also provided with a discharge hole. The industrial reaction kettle has the advantages of reasonable structural design, good using effect, full stirring, etc.
Owner:寿光市荣晟新材料有限公司

Special sweet potato fertilizer and preparation method of special sweet potato fertilizer

The invention provides a special sweet potato fertilizer. The special sweet potato fertilizer is prepared from the following raw materials in parts by weight: 10-20 parts of vinasse, 15-17 parts of enveloped ammonium bicarbonate, 10-12 parts of monoammonium phosphate, 10-12 parts of enveloped ammonium sulfate, 16-18 parts of enveloped potassium sulphate, 20-30 parts of plant ashes, 1-2 parts of manganese sulfate, 1-2 parts of ferrous sulfate, 1-2 parts of magnesium sulfate, 0.1-0.5 part of zinc sulfate, 0.1-0.3 part of borax, 10-12 parts of cinerite, 5-7 parts of wood charcoals, 3-4 parts of radix euphorbiae lantu powders, 3-4 parts of radix stemonae powders, 10-15 parts of bagasse, 10-15 parts of volcanics, 18-22 parts of cow dung, 3-4 parts of carboxymethylcellulose, 15-20 parts of 30% of sulfuric acid, 5-10 parts of limes, 10-15 parts of pig hairs and 4-6 parts of cottonseed oil. The special sweet potato fertilizer is prepared by a method comprising the following steps: conducting acidolysis on hairs to generate amino acid, then generating a micro element fertilizer liquid and an intermediate element fertilizer liquid chelated with amino acid, then sintering the volcanics to prepare a fertilizer carrier, fermenting an organic fertilizer, mixing a nitrogen-phosphorus-potassium fertilizer, the carrier, the organic fertilizer and a vegetable insecticide, then spraying the micro element fertilizer liquid and the intermediate element fertilizer chelated with amino acid, then granulating, and finally adopting the cottonseed oil for enveloping. According to the special sweet potato fertilizer provided by the invention, the fertilizer utilization ratio is improved obviously, the slow release effect is achieved, the fertilizer application amount is lowered, the pesticide residual is lowered, and the output and the quality of sweet potatoes are improved.
Owner:MAANSHAN KEBANG ECO FERTILIZER

Flame retardant and use thereof in polymer modification

The invention relates to a fire retardant and an application thereof in polymer modification. The fire retardant can effectively improve the surface property of magnesium hydrate, and increase the compatibility thereof with a polymer, and the modified polymer has good retardant property and processing and mechanical properties. The raw materials of the fire retardant are calculated by weight and comprise 100 portions of magnesium hydrate, 5 portions to 15 portions of silane coupling agent and 3 portions to 10 portions of higher fatty acid and/or higher fatty acid salt. The application of the fire retardant in the polymer modification can be carried out by a common mode, and 50 portions to 70 portions of the fire retardant is melted and blended with 30 portions to 50 portions of the polymer by weight. The method modifies the magnesium hydrate together with a silane coupling agent, the higher fatty acid and/or higher fatty acid salt and a fire-retardant synergist. The compatibility of the fire retardant obtained and the polymer is greatly improved, compared with the compatibility of the fire retardant obtained and magnesium hydrate, thus being capable of effectively increasing the filling content of the magnesium hydrate in the polymer and not only improving fire-retardant property, but also improving processing and mechanical properties relatively.
Owner:周到

Mesoporous silicon material as well as preparation method and application thereof

The invention relates to a mesoporous material and particularly relates to a functionalized ordered mesoporous silicon material which is synthesized by taking polyacid-type ionic liquid as a raw material as well as an application of the mesoporous silicon material in oxidation desulfuration of fuel oil. According to the mesoporous silicon material, the polyacid-type ionic liquid is not only used as a template agent of the mesoporous material, but also used as a catalytic activity center, and transition metal is introduced into the mesoporous material structure in situ. A simple and nontoxic synthesis method of the metal-doped green mesoporous material is searched, has a favorable academical research value and also has a wide application prospect in the industrial production. The mesoporous silicon material as well as the preparation method and the application thereof have the advantages that the method is simple in process, and the mesoporous silicon material which is narrow in pore size distribution, regular and ordered in pore duct and good in thermal stability and has the pore size of 2-50nm is self-assembled under the guidance action of inorganic matters and organic matters by adopting a sol-gel method. The purpose of deep desulfuration can be achieved when the mesoporous silicon material is used as a catalyst for an oxidation removing reaction process of organic sulfides.
Owner:泰州市海创新能源研究院有限公司

High-efficiency chilling molding sand and preparation method thereof

The invention provides high-efficiency chilling molding sand. The high-efficiency chilling molding sand is characterized by being prepared from the following raw materials in parts by weight: 240-260 parts of chromite sand, 100-120 parts of alumina, 20-30 parts of brown aluminum oxide, 1-2 parts of nanometer carbon powder, 1-2 parts of calcium aluminate cement, 3-4 parts of alpha-Al2O3 micro powder, 10-12 parts of steel fiber, 2-3 parts of sodium tripolyphosphate, 1-2 parts of dimethyl silicone oil, 1-2 parts of ferrocene, 4-5 parts of furan resin, 2-3 parts of benzenesulfonic acid and a proper amount of water. The preparation method of the high-efficiency chilling molding sand comprises the following steps: calcining chromite sand and alumina, adding the sodium tripolyphosphate, the furan resin and the like, grinding, and finally calcining at a high temperature. The obtained high-efficiency chilling molding sand has excellent caking property, plasticity, thermal stability, air permeability and dispersity; the dispersity of the high-efficiency chilling molding sand is improved by using the alpha-Al2O3 micro powder, so that the molding sand is uniform; and the heat-conducting property of the high-efficiency chilling molding sand is improved by using the nanometer carbon powder, so that the effect of chilling castings is improved. The high-efficiency chilling molding sand is easy to mold and easy for core manufacturing. By adopting the high-efficiency chilling molding sand, the shrinkage cavity phenomenon of the castings is solved, the shrinkage porosity effect is above 90%, and the rate of finished products of the castings is improved.
Owner:HEFEI CITY TENVER PRECISION CASTING
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