68results about How to "More active points" patented technology

The invention discloses a synthetic method of a mesoporous material Cu-Zn-Al2O3 with high stability and the application in making an alcohol dehydrogenation catalyst, and belongs to the technical field of organic synthesis; the mesoporous material Cu-Zn-Al2O3 taking salt of copper, zinc, aluminum as raw materials, surfactants as templates, is synthesized at one step under a neutral or alkaline condition. The mesoporous material Cu-Zn-Al2O3 is used as a carrier in the preparation of the alcohol dehydrogenation catalyst, other Cu and Zn are loaded in the holes of the mesoporous material through sedimentation; while the masterbatch is made into a novel alcohol dehydrogenation catalyst after washing, drying, granulating, roasting and molding. Compared with the traditional catalyst made by coprecipitation method, the catalyst has the advantages of high catalytic activity, good product selectivity, etc.

The invention relates to the technical field of modified asphalt in a water permeable asphalt pavement and especially relates to an application of polyamide ester in improvement on the cohesiveness of the modified asphalt. In the invention, firstly hyper-branched polyamide ester with the terminal being a hydroxyl group is synthesized, and then the polyamide ester is reacted with methyl acrylate to obtain an aromatic hyper-branched polyamide ester terminated by a double bond. The compound has many branches and has a three-dimensional stereo structure, has excellent solubility with a substrate and can effectively fix an asphalt substrate. A test proves that the modified asphalt doped with the hyper-branched polymer is significantly improved in high-temperature resistance and cohesiveness.

The invention belongs to the technical field of composite fibers and particularly relates to a composite material of modified carbon fibers and nanoaramid fibers and a preparation method of the composite material. The method comprises the following steps; firstly, covering the surfaces of the carbon fibers with a layer of polydopamine composite film to obtain polydopamine modified carbon fibers; secondly, enabling the polydopamine modified carbon fibers to be positively charged by a catiomic reagent, and compounding the positively-charged polydopamine modified carbon fibers with the nanoaramidfibers. The obtained composite material has the characteristics of low density, high intensity, high modulus and the like. The carbon fibers are modified by adopting dopamine, so that an adhesive force and hydrophily of the surface of aramid fibers are enhanced. By adopting the nanoaramid fibers to replace conventional aligned chopped aramid fibers, deposition of the aramid fibers on the surfacesof the carbon fibers is facilitated, and synergism of the carbon fibers and the aligned aramid fibers is realized. The composite material and aramid fibrids are subjected to mixed suction filtrationto obtain a composite film. Compared with a composite film formed by suction filtration of the carbon fibers and the aramid fibrids, the composite film disclosed by the invention has the advantages that a maximum force is increased by 28.0 percent, a stress value is increased by 22.0 percent and a contact angle is increased by 20.2 degrees.

The invention discloses a lithium iron phosphate composite anode material in a lithium-ion battery and a preparation method thereof, belonging to the technical field of lithium-ion battery material preparation process. The method is characterized in that in a process for preparing lithium iron phosphate, little nano-wire is doped, wherein the doping amount is 0.2 to 5 weight percent of the lithium iron phosphate; and the nano-wire is one or two of metal nano-wires and metal oxide nano-wires. In the method, a raw material precursor containing lithium, iron and phosphor is adopted, and the method comprises the following steps: uniformly mixing the raw material precursor with the nano-wire after ball milling, drying, screening, presintering and calcining; and annealing to prepare a nano-wire composite lithium iron and phosphor composite anode material. The invention has the advantages that the conductive performance and other electrochemical performances of the prepared lithium iron phosphate composite anode material are remarkably improved, so the reversible capacity, the rate performance and the cycle life of the battery are improved.

The invention discloses an Ni(OH)2/NiSe nanometer rod material used for a super capacitor and a preparation method thereof. The preparation method comprises the following steps of carrying out preprocessing on foamed nickel and taking the foamed nickel as a current collector of an electrode; growing a precursor nanometer rod on a foamed nickel substrate; and then carrying out selenylation on a precursor so as to acquire an Ni(OH)2/NiSe nanometer rod. Operation of the preparation method is simple, complex equipment is not needed and cost is low. Distribution of the prepared Ni(OH)2/NiSe nanometer rods is uniform and nanometer rod surfaces form a porous structure. A test is performed under a three-electrode system. The material can reach a 1763.68Fg<1> high specific capacity under a 1Ag<1> current density and an internal resistance of the material can be 0.5omega. Simultaneously, a good rate capability and excellent electrochemical stability are possessed. The material is the excellent super capacitor electrode material.

The invention discloses a porous nano material used for a supercapacitor and with a NiCo2O4@MnMoO4 core-shell structure and a preparation method thereof. The porous nano material with the NiCo2O4@MnMoO4 core-shell structure comprises a core portion and an outer-layer protrusion portion which form a multilevel structure, a core is NiCo2O4 nanowires, and the core nanowires tightly grow on the surface of a substrate in a three-dimensional array mode. The outer-layer protrusion portion is MnMoO4 nano sheets which densely attach to the core NiCo2O4 nanowires and are crisscrossed to form the porous structure. The porous nano material with the NiCo2O4@MnMoO4 core-shell structure is prepared by adopting a two-step hydro-thermal synthesis reaction method, the process is simple and easy to operate, and large-scale industrialized production can be achieved. The porous nano material with the NiCo2O4@MnMoO4 core-shell structure and prepared by adopting the method has very high specific capacitance, also has better power multiplying properties and cycle stability and good electrochemical stability, is an excellent supercapacitor electrode material and can be used for high-energy-density supercapacitor products.

The invention discloses a treatment method of modified graphene. The treatment method comprises the following steps: pretreating and oxidizing graphite to obtain purified graphene of which the surface contains hydroxyl groups, also obtaining a long-chain molecule product by virtue of a chemical method, and then promoting reaction by virtue of designing conditions of the chemical method to ensure that long-chain molecules are grafted onto graphene. By virtue of the mode, the dispersion performance of graphene can be improved, and agglomeration can be avoided; the modified long-chain molecules are wide in source, are environment-friendly, and are also beneficial to the improvement of biocompatibility of graphene; and moreover, the provided modified long-chain molecules have relatively more active sites, and more graphene modification can be provided to ensure that obtained modified graphene has the effect of regulating the viscosity of a matrix and can be used for improving the processing and application properties. The method disclosed by the invention is simple and good in use effect.

The invention relates to a method for preparing olefins by catalytic cracking of light oil, mainly solving the problems of low catalyst activity and low yield of low-carbon olefins in the process of preparing low-carbon olefins by catalytic cracking in the prior art. The method is characterized in that: a binderless molecular sieve are used as a catalyst, light oil containing C4-C10 hydrocarbon is used as a raw material, the raw material is contacted with the catalyst through a catalyst bed to generate low-carbon olefins under the condistions of a reaction temperature of 550-750 DEG C, a reaction gauge pressure of 0.001-0.5 MPa, a reaction weight hourly space velocity of 0.1-4 h<-1>, and a weight ratio of water to light oil of 0.1-3:1, wherein, the binderless molecular sieve catalyst has a pore volume of 0.1-0.3 ml/g, an average aperture of 50-70 nm, a porosity of 20-30 %, and a binder content of 0-5 %; after forming and sintering, the strength of the catalyst is 60-200 N. The invention can be applied in the industrial production of preparing olefins by catalytic cracking of light oil.

The invention discloses an NiSe-Ni3Se2 porous nanosphere material used for a supercapacitor and a preparation method for the material. The preparation method comprises the steps of pre-treating porous foam nickel and taking the pre-treated porous foam nickel as a current collector of an electrode; mixing and stirring selenium dioxide, nickel nitrate hexahydrate and water to obtain a precursor solution; and putting the treated foam nickel into the precursor solution, and performing a hydrothermal reaction to obtain an NiSe/Ni3Se2 nanosphere, and forming a porous structure, wherein the surface of the nanosphere consists of criss-cross nanowalls. The preparation method is simple in operation, environmentally-friendly, low in cost and suitable for large-scale production; and the prepared supercapacitor electrode material has relatively high specific capacitance and good electrochemical stability.

The invention discloses a hyperbranched structure-containing asphalt pavement joint sealant and a preparation method thereof. The joint sealant is prepared from, by weight, 44-52 parts of matrix asphalt, 5-9 parts of a hyperbranched monomer, 10-20 parts of an auxiliary additive, 1-7 parts of a viscosity reducer, 2-10 parts of a composite modifier and 12-18 parts of a filler. The preparation method comprises the following steps: heating the matrix asphalt to 130-150 DEG C, conveying the heated matrix asphalt to a stirring tank, adding the auxiliary additive, stirring the matrix asphalt and the auxiliary additive for 30 min, heating the obtained mixture to 150-170 DEG C, sending the heated mixture to a colloid mill, heating the mixture to 190 DEG C, adding the composite modifier, stirring the mixture and the composite modifier for 1 h, cooling the obtained material to 160-170 DEG C, adding the hyperbranched monomer, stirring the material and the hyperbranched monomer for 1 h, adding the filler and the viscosity reducer, and stirring all above materials for 1 h to obtain the joint sealant. The hyperbranched structure-containing asphalt pavement joint sealant has high elasticity recovery rate and excellent high and low temperature resistance, is suitable for asphalt pavement cracks under different climate conditions; and the preparation method has the advantages of simplicity, simplicity in operation, and suitableness for industrial application.

The invention discloses an organic-inorganic hybrid core-shell particle as well as a preparation method and application thereof. According to the organic-inorganic hybrid core-shell particle, a monodisperse SiO2 nano particle is used as a shell layer; a hyperbranched polymer is used as a core; the hyperbranched polymer is synthesized through a condensation polymerization between AB3 and AB2 type monomers. The preparation method of the organic-inorganic hybrid core-shell particle comprises the following steps of 1), synthesizing an ABx type monomer through a Michael addition reaction, wherein the ABx type monomer is a compound of the AB3 and AB2 type monomers; 2), preparing Pickering emulsion by using the SiO2 nano particle as a stabilizer, the ABx type monomer as a liquid phase and a block polymer and a polyamine as synergetic stabilizers; 3), preparing to obtain the organic-inorganic hybrid core-shell particle through a polymerization technique of the Pickering emulsion and an interfacial self-assembly technique between the liquid phase and the nano particle. The organic-inorganic hybrid core-shell particle can be used for enhancing and toughening epoxy resin; the toughness and the strength of a cured body of the epoxy resin are obviously improved; meanwhile, the tensile property, the elastic modulus and the glass-transition temperature of resin are ameliorated drastically.

The invention relates to an adhesive-free zeolite catalyst and a preparation method thereof. The problem of low activity of the conventional catalyst is mainly solved. According to the new adhesive-free zeolite catalyst, the problem is well solved by adopting the technical scheme that the pore volume is 0.1 to 0.3 milliliter per gram, the average aperture is 50 to 70 nanometers, the porosity is 20 to 30 percent, and the content of the adhesive is 0 to 5 percent; the catalyst has the advantage of relatively high activity; the preparation method can be applied to industrial preparation of the adhesive-free catalyst; and the prepared catalyst can be used in the reaction of preparing ethylene and propylene by catalytic pyrolysis of naphtha.

The invention provides a Co0.8Ni0.2TaO6 photocatalyst with a visible light response. The microstructure of the photocatalyst is porous micro/nano spheres of which the particle sizes are 5-10nm; and the diameters of the porous micro/nano spheres are 0.5-2 microns. The photocatalyst is prepared through sol-gel reaction, spray drying and burning of tantalum chloride, nickel acetate and cobalt nitrate as main reaction materials according to the stoichiometric ratio of a nickel element, a cobalt element and a tantalum element in the Co0.8Ni0.2TaO6. The preparation method is simple in preparation process, relatively low in cost, low in energy consumption; and the prepared photocatalyst has a good catalytic effect, has relatively high catalytic water decomposition efficiency under visible light radiation, and has potential application prospect in the field of hydrogen production from photocatalytic water splitting and water treatment.

The invention relates to a method for manufacturing full-tire rubber powder high-tenacity reclaimed rubber by oligomer ester. The method includes the steps: matching the oligomer ester into a regeneration activator system; uniformly stirring and mixing the oligomer ester and full-tire rubber powder in a high-temperature mixing tank to obtain mixed rubber powder; recovering the mixed rubber powderby the aid of waste rubber desulphurization devices (dynamic desulphurization tank device, screw extrusion device and spiral extrusion device) to form disulfide powder; refining and packaging the disulfide powder to form high-performance reclaimed rubber products. The method solves the problem of high consumption of domestic high-tenacity reclaimed rubber.

The invention relates to a mesoporous material and a preparation method of the mesoporous material; the mesoporous material comprises the raw materials by weight percent: 1-30% of Cr2O3, 5-20% of Al2O3 and 50-90% of SiO2. The mesoporous material prepared by the invention has good heat stability and larger specific surface area, and is regular in structure and more in active points. The invention also relates to a catalyst taking the mesoporous material as carrier, and a preparation method of the catalyst; the catalyst comprises the raw materials by weight percent: 5-25% of Cr2O3, 4-15% of Al2O3, 50-85% of SiO2, 0.2-10% of Me and 0.1-5% of MxO. The catalyst prepared by the invention has the specific surface area larger than 150m<2>/g, and is stable in structure and excellent in catalytic activity.

The invention discloses a modified carbon nanotube treatment method. The method comprises that carbon nanotubes with surface hydroxyl are obtained by a chemical treatment method, a long-chain molecule product is obtained by a chemical method, and the carbon nanotubes and the long-chain molecule product undergo a reaction under chemically designed conditions so that the long-chain molecule is grafted to the carbon nanotube. The modified carbon nanotube treatment method can improve carbon nanotube dispersibility and prevent agglomeration. The modified long-chain molecule has a wide source, is environmentally friendly, is conducive to improvement of carbon nanotube biocompatibility, has a lot of active points and can be used for modification of a lot of carbon nanotubes. The modified carbon nanotube can adjust base viscosity and improve processing and use performances. The modified carbon nanotube treatment method has simple processes and good use effects.

The invention discloses a steel rim vehicle wheel surface phosphating treatment method and relates to the technical field of steel treatment. The method comprises: (1) grinding, (2) cleaning, (3) plasma treatment and (4) phosphating treatment. The method can well protect the steel rim vehicle wheel surface, improve the film forming stability, greatly improve the compactness and uniformity of the phosphated film, realize high phosphated film adhesion, improve the corrosion resistance and wear resistance of the surface of the steel rim vehicle wheel surface, realize high phosphated film purity,facilitate precipitate removal, shorten the conventional high-temperature surface phosphating treatment time, realize fast phosphating treatment at the normal temperature, prevent heating, solve the problem that the conventional high-temperature phosphating treatment method easily causes phosphated film impurities and precipitates difficult to remove, and improve the phosphating efficiency.

The invention discloses a preparation method for nanorod-cluster-shaped Pt. Advanced fatty amine is heated and molten into colorless clear solution; pentanedione platinum is added, and ultrasonic treatment is conducted at the temperature above 55 DEG C till light yellow-green clear solution is obtained; and then the light yellow-green clear solution is directly placed in a 165-180 DEG C environment for 6-12 h of reaction, and centrifugation and washing are conducted. A nanorod-cluster-shaped Pt material is synthesized with an oil phase solvothermal method, and no template agent CTAB needs to be added. Compared with the prior art, the center solid area of the synthesized nanorod-cluster-shaped Pt is small, and more active points can be exposed. The synthesized nanorod-cluster-shaped Pt is loose in aggregate and has a large specific surface area, and quality activity and specific activity for methanol oxidation are 616 mA/mg and 2.46 mA/cm2 correspondingly and are 4.17 times and 6 timesthose of commercial Pt/C correspondingly.

The invention provides a temporary orthopaedic implant and a preparation method thereof, and belongs to the technical field of medical materials. The temporary orthopaedic implant is injectable composite temperature-sensitive hydrogel which is composed of a chitosan quaternary ammonium salt, quaternary ammonium salt-modified nano-hydroxyapatite and an ampholytic surfactant. After the injectable composite temperature-sensitive hydrogel is injected into the human body, an electrostatic force is formed among quaternary ammonium salts on the surface of the chitosan quaternary ammonium salt and quaternary ammonium salts and phosphate on the surface of the quaternary ammonium salt-modified nano-hydroxyapatite through anions and cations of the ampholytic surfactant so as to obtain hydrogel with aporous three-dimensional cross-linked network structure. Through modification with quaternary ammonium salts, the temperature-sensitive hydrogel is formed mainly through the electrostatic interaction, the mechanical properties of the hydrogel is improved, and the hydrogel has good antibacterial properties; and the amino acid ampholytic surfactant is preferably used as a bridge in electrostatic crosslinking, good biocompatibility is achieved, and a through cross-linked network is formed, so that the mechanical properties are improved further.

The invention discloses a PVC environment-friendly color master batch which is prepared from the following raw materials in parts by weight: 40-60 parts of a pigment, 30-40 parts of a resin matrix, 15-20 parts of a dispersing agent, 8-10 parts of poly(1, 6-hexanediol succinate), 6-9 parts of flame-retardant micro-nano spheres, 5-7 parts of wet ultrafine calcium carbonate and 0.5-1 part of a processing agent. The PVC environment-friendly color master batch is prepared by the following steps: S1, drying raw materials; S2, premixing; S3, obtaining a premix; and S4, carrying out extrusion granulation and water-cooling grain-sized dicing. A resin matrix adopted in the color master batch disclosed by the invention is used as a carrier of pigment, and the resin matrix comprises PVC resin, polylactic acid and polycarbonate resin. Under the modification effect of poly(1, 6-hexanediol succinate), the PVC resin has good biodegradability. The raw materials are all green and environment-friendly. Because of the addition of the flame-retardant nano microspheres, the color master batch is endowed with good flame retardance, and the obtained PVC color master batch has the advantages of being environment-friendly, flame-retardant, high in toughness and the like and can be widely used.