400results about How to "Solve the problem of fragmentation" patented technology

The invention provides a power distribution network overall planning method and system. The power distribution network overall planning method includes the steps: 1) dividing power supply areas; 2) determining the power supply area attribute and the planning strategy; 3) carding the present situation of grids; 4) predicting load; 5) determining the planning target; 6) dividing the power supply grids; 7) planning a power supply grid present situation wiring diagram and a target wiring diagram; 8) determining the planning scheme and the transitional scheme; 9) forming concrete implementation projects; and 10) compiling the line channel planning. The power distribution network overall planning method and system can systematically guide planning and construct a medium voltage power distribution network rack so as to guarantee reliability and firmness of the medium voltage power distribution network. The power distribution network overall planning method and system can construct a power distribution network with necessary capacity margin, proper load transferring capability, certain self-healing capability and emergency processing capability, and reasonable distributed power supply admission capability, and can safely, reliably and economically supply power for the user.

The invention provides aliphatic-aromatic copolyester, a preparation method and application thereof. Polymerization monomers comprise a compound selected from aliphatic dibasic acid, and naphthenic base dibasic acid or the ester, the anhydride and the acyl halide thereof, a compound selected from aromatic dibasic acid or the ester, the anhydride and the acyl halide thereof, a compound simultaneously with two functional groups selected from an amino-group, a mercapto group or a hydroxy or a compound of a derivative of the amino-group, the mercapto group or the hydroxyl with an epoxy group and an azepine ring, a compound selected from unsaturated acid with at least one C-C, C-O, C-N or C-S double bond and C-C or C-N triple bond or the ester, the anhydride and the acyl halide thereof and a compound of unsaturated alcohol with at least one C-C double bond or a C-C triple bond or an epoxide thereof. The aliphatic-aromatic copolyester is prepared by carrying out esterification and polycondensation after mixing the polymerization monomers, polymerizing the double bonds and/or the triple bonds on the polymerization monomers under the action of an initiator and then carrying out a graftingand/or coupling reaction.

An environment-friendly solar cell back film comprises a substrate, a fluorine-containing polymer layer and an adhesive layer, wherein the fluorine-containing polymer layer is obtained by coating waterborne fluororesin coating solution on the surface of the substrate by means of curing, and the waterborne fluororesin coating solution comprises, by weight, 15-35 parts of fluororesin, 5-10 parts of modified resin A, 6-12 parts of modified resin B, 0.5-3 parts of polymer filler, 40-70 parts of water and 1-5 parts of cosolvents, wherein the weight ratio of the modified resin A to the modified resin B is 1:0.8-1:1.5. The environment-friendly solar cell back film is environment-friendly, low in production cost, excellent in performance, high in peeling strength and good in water resistance and weather resistance.

The present invention is preparation process of carbon nanotube reinforced copper-base composite material with high strength and high conductivity, and belongs to the field of copper-base composite material preparing technology. The preparation process includes the following steps: adding nickel nitrate hexahydrate, yttrium nitrate hexahydrate and ethanol soaked copper powder in certain weight proportion into distilled water to obtain nickel nitrate solution; dropping sodium hydroxide solution to the nickel nitrate solution to produce neutralizing reaction obtaining ternary Ni(OH)2/Y(OH)3/Cu colloid; washing, filtering, drying, grinding and calcining to obtain Ni/Y/Cu catalyst precursor; setting the precursor into reaction furnace, introducing H2 to reduce, and introducing N2 and reaction gas for catalytic cracking reaction to obtain composite carbon nanotube/Cu powder; initially pressing the composite powder, sintering and re-pressing to obtain carbon nanotube in-situ reinforced copper-base composite material.

The invention relates to a preparation method of a graphene enhanced magnesium-based composite material, and relates to a preparation method of a nanometer composite material. The invention aims at solving the technical problem of nonuniform dispersion of the traditional graphene in a matrix metal. The preparation method comprises the following steps of 1, mixing graphene with an alcohol dispersant in absolute ethyl alcohol, chemically dispersing under an ultrasonic condition to obtain chemically dispersed graphene; 2, mixing the chemically dispersed graphene with Zn powder for ball milling to obtain Gra@Zn composite powder; 3, adding Gra@Zn composite powder to a semi-solid state Mg-Zn alloy fusant for mechanical stirring, then increasing temperature till liquid state, and stretching an ultrasonic rod below an alloy liquid level for ultrasonic dispersion treatment to obtain an alloy fusant; 4, pouring the alloy fusant into a preheated mould, and then solidifying so as to prepare the graphene enhanced magnesium-based composite material. The preparation method disclosed by the invention is applied to the field of preparation of the nanometer composite material.

The invention relates to an epoxy resin/carbon nanotube high-strength lightweight composite material, and a preparation method thereof. The material comprises components of, by mass: 100 parts of epoxy resin, 30 parts of a curing agent, 10 to 60 parts of hollow glass microballoons, 1.0 to 6.0 parts of carboxylated carbon nanotubes, and 0.75 to 1.5 parts of an aminosilane coupling agent. The carboxylated carbon nanotubes are grafted on the surfaces of the hollow glass microballoons through chemical methods, and the materials are composed into epoxy resin. With good dispersibility of the hollowglass microballoons in epoxy resin, a dispersion problem of carbon nanotubes in epoxy resin is effectively solved, and mechanical intensity and conductivity of the composite material are improved. With the lightweight of the hollow glass microballoons, the density of the composite material is substantially reduced. The high-strength lightweight composite material produced with the method can be applied in the advanced material fields of aerospace, deep sea buoyancy materials, and wind power blades.

The invention discloses a graphene thermal-conductive film/thermal-conductive silica gel film composite material with a layered alternative structure and a preparation method of the composite material, and relates to the graphene/thermal-conductive silica gel composite material and the preparation method thereof. The invention aims to solve the technical problems that graphene in a current graphene/thermal-conductive silica gel composite material is difficult to disperse, and a stable and continuous thermal-conductive path is difficult to form. The composite material is composed of graphene thermal-conductive films and thermal-conductive silica gel films, and the graphene thermal-conductive films and the thermal-conductive silica gel films are alternately arranged. The preparation method of the composite material comprises the following steps: 1, preparing the graphene thermal-conductive film; 2, preparing thermal-conductive silica gel; and 3, preparing the graphene thermal-conductivefilm/thermal-conductive silica gel film composite material with the layered alternative structure. The method disclosed by the invention adopts a method of compounding nanocellulose and graphene to prepare the graphene thermal-conductive film, and utilizes an interface technology to compound the graphene thermal-conductive film with the thermal-conductive silica gel film to form the graphene/thermal-conductive silica gel film composite material with the layered alternative structure, and the composite material meets the requirements for high-performance thermal-conductive materials in the fields such as aviation, aerospace, electronic and electrical engineering.

The invention relates to the technical field of polymer material, in particular to a flame-retardant ABS modified resin having high glaze and a manufacturing method thereof. The invention provides the flame-retardant ABS modified resin having high glaze, which comprises ABS high glue powder, SAN resin, brominated flame retardant, antimonic flame retardant, antioxidizer, heat stabilizer and processing aid. The flame-retardant ABS modified resin is characterized in that the ABS has the rubber-particle size being less than 1mum. Based on maintaining excellent physical property of the original ABS resin, the flame-retardant ABS modified resin having high glaze has good flame retardant property and the high glaze of the surface. The flame-retardant ABS modified resin having high glaze can be prepared by traditional twin-screw extrusion process equipment, has the advantages of simple and continuous production flow, high production efficiency and stable product quality, and can be widely applied to the industries such as household electrical appliances having high glaze and flame-retardant requirements, automobile industry, etc.

A high-filling highly-pressure-resistant U-PVC water supply pipe fitting is provided. Raw materials are uniformly mixed by a mixer, and subjected to injection moulding at 160-190 DEG C. The raw materials comprise 100 parts by weight of polyvinyl chloride resin, 1-10 parts by weight of a heat stabilizer, 0.1-4 parts by weight of a lubricant, 0-5 parts by weight of a processing modifier, 0-8 parts by weight of a shock-resistant modifier, 1-10 parts by weight of a compatilizer, and 5-50 parts by weight of a filing agent, with pigments not included. The heat stabilizer is one or more of organo-tin, a calcium-zinc composite heat stabilizer, and an organic or inorganic heat stabilizer. The lubricant is one or more selected from stearic acid and derivatives thereof, metallic soap, polyesters or a saturated hydrocarbon lubricant. The processing modifier is one or more of a processing modifier with ultra-high molecular weight or a common processing modifier. The anti-shock modifier is one or more of a scheduled elastomer anti-shock modifier, an unscheduled elastomer anti-shock modifier or a transitional anti-shock modifier. The compatilizer is one of maleic anhydride grafted polypropylene, silane grafted polypropylene, glycidyl methacrylate grafted polypropylene or methacrylic acid grafted polypropylene.

A growth substrate is removed from a semiconductor film, and a surface of the semiconductor film exposed by removing the growth substrate is flattened. The semiconductor film along device division lines are partially etched by dry etching to form grooves in a lattice that form streets, not reaching the metal support in the semiconductor film. The surface of the semiconductor film at the bottom of the grooves is flattened. The semiconductor film along the device division lines at the bottom of the grooves are further etched by wet etching to expose the metal support at the bottom of the grooves to finish the streets.

The invention relates to a method for preparing a pretreated white carbon black/natural rubber composite material, relates to the technical field of property improvement on natural rubber composite materials, and is used for solving the problem that natural latex is easy to be cured at an early stage in an experiment process. Firstly, the white carbon black is treated by using a coupling agent to organize the surface of the white carbon black, so that the mutual action between the white carbon black and the rubber is improved; secondly, a white carbon black/rubber nano composite material is obtained through flocculation, washing and drying processes. The method comprises the following steps: firstly, normally stirring and premixing the white carbon black with water, subsequently dropping the coupling agent to modify, further mixing with the natural latex, and finally flocculating, washing and drying so as to obtain the white carbon black/rubber nano composite material. As the white carbon black is uniformly dispersed in natural rubber liquid slurry added with the white carbon black, the white carbon black/rubber nano composite material can be directly used for machining and preparing rubber products such as vulcanized natural rubber which is modified by the white carbon black.

The invention relates to diatom ooze capable of releasing anions and a preparation method of the diatom ooze. The diatom ooze is prepared from the following raw materials in percentage by weight: 10-50% of kieselguhr, 10-40% of composite tourmaline powder, 0.5-5% of rare earth oxide, 5-30% of titanium dioxide, 5-30% of a cementing material, 1-15% of redispersible powder and 0.1-2% of cellulose, wherein the composite tourmaline powder is mainly prepared from the following raw materials in percentage by weight: 50-80% of tourmaline powder, 10-40% of nanometer titania, 1-10% of sodium silicate and 0.5-1% of a surfactant. The diatom ooze is capable of continuously releasing the anions and a far infrared ray, has good air purification effect and human health effect, is high in purification efficiency and purification persistence and has good adhesive force.

The invention relates to an aramid fiber reinforced 3D graphene/epoxy resin composite material and a preparation method thereof. Aramid fibers are uniformly distributed and loaded on 3D graphene, and the composite material has electrical conductivity of 102S/cm or higher and compressive strength of 115MPa or higher. The aramid fiber reinforced 3D graphene/epoxy resin composite material has high comprehensive strength and high electrical conductivity, and can be used as a conducting material or electromagnetic shielding material with good buffering capacity.

The invention discloses a method for recycling multiple precious metals from anode mud, comprising a step of smelting and filtering the anode mud in a smelting furnace, cooling the smelted material and then preliminarily immersing and removing copper to obtain extract and leached mud, conveying the leached mud to acid leaching tank to obtain extract and leached mud again, conveying the extract to the hydrolysis tank to process neutralization precipitation, conveying the leached mud to alkaline leaching lead tank, processing smelting method to the processed leached mud. The extract is conveyed to copper extraction tank to process back extract by the organic substances of organic box. Copper-contained material and extract residual are obtained after extraction. The copper-contained material is conveyed to the load organic box to process back extract; after the back extract, the material part is conveyed to the organic box to reprocess; the rest back extract liquid is conveyed to the electrodeposition tank to process electrodeposition to obtain cathode copper. The extract residual liquid obtained from copper extraction box is conveyed to a sedimentation tank to settle; and the waste liquid is conveyed to waste water treatment system to treat. The invention uses wet leaching method to separate precious metals, combines the advantages of fire and wet production and solves the problems of arsenic pollution, long production process, bad raw material applicability, long production period and lower comprehensive recovery in the fire smelting. The recycling yield of gold, silver, copper, antimony, bismuth, arsenic and lead reaches up to 95%.

The invention provides a method for comprehensively analyzing and processing real-time alarms on the basis of attack strategy graphs and an intrusion detection system thereof; splitting of attack scene graphs can be effectively prevented, the complete attack scene graphs can be reconstructed, the subsequent attack can be predicted, attack scenes can be fused with one another, and alarm information capable of being directly utilized can be accurately provided for analysts. The method for comprehensively analyzing and processing the real-time alarm includes steps of (1), constructing the attack strategy graphs; (2), reconstructing attack scene graphs, adding missing alarms or inferences of attack links omitted deliberately by an attacker, utilizing inference results as inference alarms and adding the inference alarms into alarm sets to be associated; (3), predicting subsequent attacks; (4), fusing the attack scene graphs, expressing fused associated records by graphs, and acquiring fresh attack scene graphs. The method and the intrusion detection system have the advantages that splitting of attack scene graphs can be effectively prevented, and analyzing accuracy can be improved. The intrusion detection system is used for analyzing and processing safety events to alarms generated by the system by the analyzing and processing method.

The invention relates to the field of thermal conductive materials, and particularly discloses high thermal conductive paste. The high thermal conductive paste comprises, by weight, 20%-30% of silicone oil, 60%-70% of composite thermal conductive powder, 2%-5% of a coupling agent, 3%-7% of a dispersing agent and 1%-3% of a flatting agent. The invention further discloses a preparation method for preparing the high thermal conductive paste. The thermal conductive paste is high in thermal conductive coefficient, can be used on various components for thermal conduction and can be used for silk-screen printing.

The invention relates to a solvent-free electrostatic conducting anti-corrosive coating for oil tanks and the preparation method thereof. The solvent-free electrostatic conducting anti-corrosive coating comprises a solution A prepared from bisphenol A type liquid-state epoxy resin, epoxy-containing polyol ether, titanium dioxide, precipitated barium sulfate, talcum powder, acidic polyester and polyamide, fluorocarbon-modified siloxane, polyacrylate-modified fluorocarbon polymer, poly-carboxylate, light-colored conductive powder and alkanolamine solution of unsaturated acidic carboxylate, and a solution B prepared from polyamide resin, N,N-dimethyl benzyl amine and poly-carboxylate. When in use, the solution A and the solution are mixed and solidified to form a coating. The solvent-free electrostatic conducting anti-corrosive coating has constructability and storage stability similar to those of solvent electrostatic conducting coatings, and no discharge of volatile organic solvent in the production and the construction process. The coating has the advantages of good electrostatic conductivity, high chemical resistance and good oil resistance, and can be applied to steel surfaces of different parts in the oil tanks, such as bottom plates, inner walls, floating cabins, floating roofs and pillars, to prevent corrosion.

The invention discloses a method for preparing a graphene nano-composite energetic material through an atomic-layer deposition technology. The method includes the steps that graphene loaded nanometer metal compound powder is prepared through an ultrasonic-assisted solution mixing and in-situ reduction method, so that even scattering of nanometer metal on the surface of graphene is achieved; and then, the gas-phase atomic-layer deposition technology is adopted, two different precursors pass through a reaction cavity alternately, the precursors make contact with the surface of the graphene/nanometer metal compound powder fully, a chemical reaction is set off, and oxides are generated. By means of the method, the oxides wrap the graphene surface and the nanometer metal surface evenly. According to the graphene nano-composite energetic material prepared through the method, the affinity between the oxides and the nanometer metal surface is increased, and spatial arrangement is improved. Due to the addition of the graphene, the scattering situation of the nanometer metal is improved, and the energy release rate of the energetic material is increased. The method is high in automation degree and good in safety, the material can be directly used without after-treatment, and mass production of the graphene nano-composite energetic material is achieved easily.

The invention belongs to the field of composite materials and particularly relates to a preparation method of modified diatomite/polyethylene composite plastic. The preparation method comprises the steps as follows: drying superfine diatomite and then mixing the dried superfine diatomite and alcohol, conducting ultrasonic dispersion, adding a modifier, mechanically stirring, centrifugally separating, and conducting vacuum drying on a solid product obtained by separation for 1-24h to obtain the modified diatomite; or directly mixing the modifier and the alcohol, uniformly spraying a mixed solution onto the surface of the cooled diatomite to obtain the modified diatomite, adding the modified diatomite and polyethylene to an internal mixer for blending, and then conducting hot pressing with a plate vulcanizing machine to fabricate a diatomite/polyethylene composite plastic plate. The method adopts superfine and surface modification technologies to prepare the novel low-carbon, low-emission and environment-friendly polyethylene plastic which can be used for replacing a calcium carbonate filler in plastics.

The invention provides resin wave absorption paint, which is prepared from resin, graphene and ferroferric oxide compounded material, dispersing agents, anti-settling agents and solvents. The paint is characterized in that the addition mode of graphene materials in the resin wave absorption paint is creatively changed; firstly, the graphene is compounded with a hard material of ferroferric oxide in the paint to obtain the graphene and ferroferric oxide compounded material; then, the graphene and ferroferric oxide compounding material is combined with the other ingredients to obtain the resin wave absorption paint. The graphene dispersing problem can be better solved; the complete realization of the excellent performance is ensured; the problem of mixing nonuniformity of flexible graphene materials in a paint system is solved; in addition, the uniform dispersion of ferroferric oxide nanometer particles on the surface of the graphene can be realized; the performance is better achieved; more importantly, the specific ingredients are matched to be used, so that the prepared resin wave absorption paint has the advantages of thin film layer, high intensity, strong wave absorption capability, wide wave absorption frequency band and low cost; wide application prospects are realized.

The invention discloses a method for preparing a high-silicon steel ribbon through using an electric brush composite plating method. The method is characterized in that a pure iron ribbon, a low-carbon steel ribbon or a low-silicon steel ribbon is used as a cathode plating piece ribbon, an electric brush plating anode plate is used as an anode, a layer of iron-silicon iron particle composite plating layer is coated on the cathode plating piece ribbon through using an electric brush composite silicon plating process, a composite plating layer steel ribbon adopting a steel-ribbon substrate as a core part is formed, then the uniform dispersion heat treatment is carried out, silicon-contained particles in the iron-silicon iron particle composite plating layer are uniformly dispersed into the steel ribbon substrate of the core part, and the high-silicon steel ribbon can be continuously prepared. The invention also discloses a continuous silicon steel ribbon preparing device which comprises an unreeling guide device, a conveying device, an electroplating device, a dispersion heat treatment device and a rolling device. The high-silicon plating layer is electrically plated on the cathode plating piece ribbon, then the high-silicon steel ribbon with an excellent magnetic conduction performance is obtained through using a heat treatment process, the simplicity in operation can be realized, characteristics such as high efficiency and continuity in preparation can be achieved, and the preparation cost also can be greatly reduced.