45results about How to "Content regulation" patented technology

The invention relates to a copper-silver double-metal nanowire and a preparation method thereof. The preparation method comprises the following steps: 1) dissolving a cationic surfactant into an organic reductant to form an organic reducing system, wherein the organic reductant comprises long-chain alkyl amine; 2) adding copper salt dissolvable in the organic reducing system and metal nanoparticles as a catalyst into the organic reducing system prepared in the step 1), and reacting at a first specified temperature; 3) adding silver salt dissolvable in the organic reducing system into the organic reducing system after reaction in the step 2), reacting at a second specified temperature, filtering, cleaning and drying to obtain the copper-silver double-metal nanowire.

The invention discloses a polyimide containing porphyrin, and aromatic polyimide with better thermal stability is obtained by using aromatic dicarboxylic anhydride with better thermal stability and aromatic organic diamine as basic framework. The preparation method comprises the following step of carrying out condensation reaction on diamino tetraphenyl porphyrin, the aromatic organic diamine and the aromatic dicarboxylic anhydride to synthesize soluble polyimide containing porphyrin, having the characteristics of simple operation, strong controllability and recyclable use of products. The polyimide containing the porphyrin can be used for preparing a corresponding nano fiber film of the polyimide containing the porphyrin by using an electrostatic spinning method, and the nano fiber film is used for detecting explosive steam under an extreme environment, having advantages of high sensitivity and rapid response.

The invention relates to a preparation method for liquid polyborosilazane and belongs to the field of inorganic nonmetallic materials. The preparation method comprises the following steps: liquid polyborosilazane and 9-borabicyclo [3,3,1]-nonane are added in a solvent in inert atmosphere to obtain mixed solution, then the obtained mixed solution is hydroborated under the stirring condition, and then the solvent is removed after completion of hydroboration to obtain the liquid polyborosilazane. The preparation method solves the problems in the traditional polymer route that excessive cross-linking is easily caused in the hydroboration addition reaction, and solid polyborosilazane has poorer fluidity. The prepared liquid polyborosilazane has good fluidity and high ceramic yield and can be directly used for the high polymer infiltration and pyrolysis method for preparing SiBCN ceramic matrix composites.

The invention relates to a super-long copper-nickel alloy nanowire and a manufacturing method thereof. The method comprises: a) dissolving a cationic-type surfactant in an organic reducing agent; b) adding copper salt used as a copper source in the organic reducing agent obtained in the step a), and adding precious metal nano-particles which is used as a catalyst, reacting at the temperature of first specified temperature; c) adding nickel salt used as a nickel source in the reducing agent after reaction in the step b), reacting at the temperature of second temperature, cleaning and drying obtained products, and the product is the copper-nickel alloy nanowire.

The invention relates to a high-boron content silicon-boron-carbon-nitrogen precursor and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing functional, bifunctional and trifunctional chlorosilane containing unsaturated groups and hexamethyl-disilazane at a low temperature according to a certain ratio, raising the temperature and completely reacting, dropping 1,3-diethyl cycloborazane under low temperature conditions according to a certain ratio, fully reacting the reactants, and finally performing reduced pressure distillation to obtain the solvent and by-products produced by the reaction, thereby obtaining faint yellow viscous liquid or a solid product, namely the SiBCN ceramic precursor. According to the synthetic method disclosed by theinvention, a novel Polyborosilicate resin is prepared by adopting a 'double boron source', the boron content of the prepared SiBCN ceramic can reach 20%, and the problems that the boron content is low and improvement of high temperature resistance and oxidation resistance of the ceramic is not obvious can be solved. The elementary composition regulation range of the precursor disclosed by the invention is wide, and resins which are suitable to serve as a high-temperature-resistant coating, a fiber reinforcement or a ceramic-based composite material matrix and have different elementary compositions can be prepared.

The invention relates to a preparation method of a W18O49/NiWO4/NF self-supporting electrocatalytic material. The preparation method includes the steps that Na2WO4.2H2O and Ni(CH3COO)2.4H2O are successively added to deionized water to obtain a mixed solution A; the mixed solution A is loaded into the a polytetrafluoroethylene lined high-pressure reactor for a hydrothermal reaction, and NiWO4 crystals are obtained by washing, drying and calcining reactants; the NiWO4 crystals and a WCl6 are successively added to absolute ethyl alcohol to obtain a solution C; the solution C is poured into the polytetrafluoroethylene lined high-pressure reactor, then foamed nickel is placed in the polytetrafluoroethylene lined high-pressure reactor for the hydrothermal reaction, final reactants are subjectedto centrifugal washing and drying with the absolute ethyl alcohol to obtain the W18O49/NiWO4/NF self-supporting electrocatalytic material. According to the preparation method of the W18O49/NiWO4/NF self-supporting electrocatalytic material, the reaction temperature is low, the condition is mild, and implementation is easy; and the preparation process is simple, the cost is low, the process is easyto control, environmental protection is achieved, the prepared W18O49/NiWO4/NF electrocatalytic material shows excellent properties of electrocatalytic hydrogen and oxygen production.

The invention relates to the field of medicine and daily chemical products, in particular to blumea balsamifera liposome. The blumea balsamifera lipidosome is prepared from the following substances inparts by mass: 0.35 to 0.65 percent of blumea balsamifera oil, 1.0 to 3.0 percent of lecithin, 0.2 to 0.5 percent of cholesterol and the balance of a PBS solution. The blumea balsamifera lipidosome can be matched with acceptable auxiliary materials in the fields of medicines and daily chemicals to be further prepared into products such as gels, ointments, eye ointments, liniments, aerosols, solutions, sols, emulsions, suspensions and the like. The blumea balsamifera lipidosome disclosed by the invention has a good transdermal absorption effect and anti-inflammatory, analgesic and skin repairactivity effects, and is non-toxic and non-irritant to skin and mucous membranes.

A preparation method of a W18o49/NF self-supporting electrocatalytic material comprises: adding a tungsten source into a mixed alcohol to obtain a solution A; adding analytically pure ethanediamine and cycloheptylamine into the solution A to obtain a solution B; pouring the solution B into a polytetrafluoroethylene-lined high-pressure reactor, subjecting nickel foam to hydrothermal reaction in thepolytetrafluoroethylene-lined high-pressure reactor with the solution B, cooling to room temperature after the reaction is over, centrifugally washing the final reaction product with absolute ethyl alcohol, and drying the centrifugally washed material to obtain the W18o49/NF self-supporting electrocatalytic material. Since W18O49 having rich oxygen defects is directly grown on NF (nickel foam) through a one-step process, the influence of adhesive upon electrical conductivity and activity of a catalyst during preparation of a working electrode is avoided, with electrocatalytic performance effectively improved.

The invention discloses fertilizer for preventing tobacco bacterial wilt and increasing the yield. The fertilizer comprises the following raw materials: cow dung, sheep dung, fish maw and gut, brewers grain, omphisa fuscidentalis hampson powder, arborvitate tops, katsuratree barks, tea straws, urea, superphosphate, monoammonium phosphate, potassium nitrate, potassium sulphate, potassium chloride, borax, zinc amino acid chelate, ferrous amino acid chelate, copper amino acid chelate, manganese amino acid chelate, molybdenum amino acid chelate, sodium metasillcate, chromium yeast, nanometer cobalt, gama-polyglutamic acid, polyaspartic acid, phosphorous acid, 3,4-dimethylpyrazole phosphate, a compound water-preservation agent and a microbial agent. The fertilizer organically combines four major functions of tobacco fertilization balancing nutrition, element cooperatively reinforcing function, biological antagonism restraining germs and soil conditioning preventing and treating source, greatly improves the prevention effect on tobacco bacterial wilt, and meanwhile has the effects of water retention and yield increasing.

The invention belongs to the field of olefin copolymerization reactions, and provides a copolymerization method of ethylene and alkenyl-terminated silane/siloxane. The copolymerization method comprises that ethylene and alkenyl-terminated silane/siloxane are subjected to a copolymerization reaction in the presence of a catalyst composition, wherein the catalyst composition contains a main catalyst, a co-catalyst and an optional chain transfer agent, the main catalyst is at least one selected from coordination compounds represented by a formula (I), R<1>-R<10> are respectively and independentlyselected from hydrogen, saturated or unsaturated hydrocarbonyl, hydrocarbyloxy and the like, M is selected from a Group VIII metal, and X is a halogen. According to the present invention, the used catalyst composition has high polymerization activity in the ethylene and alkenyl-terminated silane/siloxane copolymerization reaction, can increase the content of the copolymerization monomer on the polymer molecular chain, and has broad industrial application prospects. The formula (I) is defined in the specification.

The invention discloses a preparation method of nano zirconium oxide hollow spheres. A reverse precipitation technology is adopted; the preparation method comprises the following steps: firstly, preparing a homogeneous solution from a water-soluble zirconium salt solution, a water-soluble yttrium salt solution and deionized water; slowly titrating the homogeneous solution and adding the homogeneous solution into an alkaline solvent containing a complexing agent to prepare a precursor turbid liquid; a mineralizing agent is added for hydrothermal reaction; according to the method, the nano zirconium oxide powder material and the nano zirconium oxide hollow spheres are synthesized at a time, the production and manufacturing period is greatly shortened, the production and manufacturing cost issaved, the obtained nano zirconium oxide hollow spheres are micron-sized and uniform in granularity, and in addition, the nano zirconium oxide particles forming the hollow spheres have the characteristics of high purity, high tetragonal phase, high dispersity and the like.

The invention provides an A694GRF60 carbon steel forging and a preparation method thereof. According to a texture of the A694GRF60 carbon steel forging, alloy elements such as Cr, Ni, Mo, Nb and V areadded in a trace amount on the basis of common low-carbon structural steel, and the content of each component is optimized; moreover, the preparation process conditions are further optimized, so thata product of the A694GRF60 carbon steel forging has the advantages of higher strength, good plastic toughness, low-temperature impact toughness and the like, and each performance index exceeds ASTM A694 F60 standard of the American iron and steel association and reaches the advanced level of similar products at home and abroad.

The invention belongs to the technical field of new materials, and relates to a bismuth/bismuth ferrite visible-light-driven photocatalyst material as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving bismuth nitrate and ferric nitrate in an organic solvent, adding a hydroxycarboxylic acid chelating agent until the materials are completely dissolved, dropwise adding ammonia water, uniformly mixing, drying, grinding, calcining the ground sample in an air atmosphere, and carrying out reduction reaction by using hydroboron in an inert atmosphere under a heating condition, thereby obtaining the bismuth-ferric oxide composite material. According to the bismuth/bismuth ferrite visible-light-driven photocatalyst material provided by the invention, metal and a photocatalytic material can be combined more tightly, so that the bismuth/bismuth ferrite visible-light-driven photocatalyst material has more excellent structural stability, and the bismuth/bismuth ferrite visible-light-driven photocatalyst material also has higher photocatalytic activity while the cost is reduced without using additional chemical reagents.

The invention discloses a preparation method of a graphene modified tungsten carbide self-lubrication antiwear additive, which comprises the following steps of: 1) weighing a certain amount of graphene and a tungstenic precursor compound, 2) performing wetting modification on the weighed graphene by a little absolute ethyl alcohol, dispersing in a certain amount of deionized water and performing ultrasonic dispersion, 3) dissolving the weighed tungstenic precursor compound in a graphene aqueous solution prepared in step 2) to form compound powder, and putting the compound powder in an oven to form dry mixed powder, and 4) putting the dry powder in an aluminum oxide crucible, performing vacuumizing, naturally cooling to room temperature in an atmosphere of H2, and obtaining the graphene modified tungsten carbide self-lubrication antiwear additive. The additive retains a layered single-layer carbon structure property of the graphene; growing nano carbide particles increase specific gravity of the graphene; and the self-lubrication antiwear additive is expected to be applied to thermal spraying of tungsten carbide spray powder, reduces a wear rate and exerts wear reduction and resistance effects.

The invention provides a preparation method of a residual stress sensitive coating modified through graphene. The preparation method comprises the steps that (1) strontium carbonate (CaCO3), aluminum oxide (Al2O3), silicon dioxide (SiO2) and alcohol are weighed and mixed; (2) graphene oxide is dispersed in absolute ethyl alcohol; (3) dilute hydrochloric acid is used for dissolution, and meanwhile, a certain amount of distilled water is added; (4) modification and element regulation and control of Dy3+/Eu3+ are achieved through the graphene, and finally /Dy3+/Eu3+ powder modified through the graphene is obtained through drying in the vacuum atmosphere; (5) CaAl2Si2O8:Eu3+, Dy3+ powder which has the powder particle size of about 1-3 [mu]m and modified through the graphene is obtained through screening; and (6) a graphene co-doped Dy3+/Eu3+ WC-CO powder material with a certain particle size is obtained, and a visual SrAl2O4:Eu3+, Dy3+co-doped WC-CO abrasion-resistant coating is prepared through the thermal spraying technique. By the adoption of the scheme, the particle sizes of spraying materials are uniform, the purity is high, the graphene content in the powder is high, and the preparation method can be used for preparing the residual stress sensitive coating through the thermal spraying technique.

The invention relates to a method for preparing an aluminum-scandium-transition metal alloy through consumable cathode molten salt electrolysis. The method comprises the following steps: (1) preparing an aluminum alloy consumable cathode; aluminum and high-melting-point metal are made into an alloy bar, and a high-melting-point aluminum alloy consumable cathode is manufactured; and (2) preparing the aluminum-scandium multi-component alloy through molten salt electrolysis. A high-temperature aluminum-transition metal alloy bar is used as an up-inserted cathode for preparing metal scandium by molten salt electrolysis with scandium oxide as a raw material, a multi-element aluminum-scandium-transition metal alloy is formed, the melting point of the formed multi-element alloy is lower than the electrolysis temperature, and the multi-element alloy drops into a tungsten and molybdenum crucible at the bottom of an electrolytic cell from the surface of the cathode. According to the method, an existing rare earth electrolytic cell can be directly used, the aluminum-scandium-transition metal alloy is prepared through an up-insertion type consumable cathode fused salt electrolysis method under the condition that the temperature is higher than the aluminum melting point temperature, and alloy components are stable and easy to regulate and control.

The invention discloses a preparation method of thorium-containing iridium alloy, which comprises the following steps: (1) pressing high-purity iridium powder serving as a raw material on a cold isostatic press to obtain a pressed iridium block; (2) sequentially putting the iridium block into a hydrogen pre-sintering furnace and a vacuum high-temperature sintering furnace for sintering to obtain a sintered iridium block; (3) transferring the iridium block obtained by sintering into an electric arc melting furnace to be smelted with a tungsten-thorium alloy to obtain a thorium-containing iridium alloy; and (4) cleaning the iridium alloy ingot, transferring the iridium alloy ingot into an electron beam smelting furnace for smelting, and pouring to obtain the thorium-doped iridium tungsten alloy ingot. In the electric arc melting process, tungsten and thorium doping elements are simultaneously introduced through a tungsten and thorium electrode, the existing preparation process of the thorium-containing iridium alloy can be simplified, and meanwhile, the uniformity of the doping elements is guaranteed to the maximum extent. The thorium content in the iridium alloy can be regulated and controlled by adjusting the thorium content in the tungsten thorium electrode. And meanwhile, the prepared alloy has the characteristics of small grain size and excellent performance, and meets the requirements of a 238Pu isotope power supply on a cladding material.