394results about How to "Reliable preparation method" patented technology

The invention provides a self-assembly preparation method of a noble metal-graphene double-layer composite conductive film. The noble metal-graphene double-layer composite conductive film is obtained by taking noble metal ions or complex ions and graphene oxide as raw materials and adopting a solvent-induced self-assembly method. In the method, the thickness of the noble metal layer, the graphenelayer and the overall film of the double-layer composite conductive film can be regulated and controlled through concentrations and volumes of noble metal ionic solution and graphene oxide solution, and the electrical conductivities of the silver layer and the graphene layer in the double-layer composite conductive film can be regulated and controlled. The invention provides a stable and reliablepreparation method of the noble metal-graphene double-layer composite conductive film which can be applied to an electronic device.

The invention discloses a preparation method of SiO2 aerogel-filled carbon aerogel. The preparation method is characterized by comprising the following steps: (1) preparing carbon aerogel, namely taking resorcinol (R) and formaldehyde (F) as precursors (the molar ratio of R to F is 1 : 2), anhydrous sodium carbonate as a catalyst and carbon foam as a framework, and preparing the carbon aerogel based on the carbon foam; (2) performing acid treatment on the surface of the carbon aerogel, namely mixing H2O2, NH3H2O and H2O according to a volume ratio of 1 : 1 : 5 to form a mixed solution, and soaking the carbon aerogel in the mixed solution under the water-bath condition at 90 DEG C for 1 hour; (3) preparing a SiO2 precursor solution, soaking the carbon aerogel in the precursor solution, ageing and drying to obtain the SiO2 aerogel-filled carbon aerogel. The preparation method is reliable and good in safety; the prepared composite aerogel keeps good performances of the aerogel and improves the mechanical performance of the aerogel; the surface of the composite aerogel is hydrophobic, so that moisture in the air is not easily absorbed and the shrinkage rate is low.

The present invention is foamed aluminum supported titania catalyst and its preparation process and application, and features that the catalyst has foamed aluminum carrier and nanometer titania or nanometer doped titania on the surface of the carrier. The catalyst has simple preparation process, facile material, excellent stability, high catalytic activity, convenient use and convenient reuse, and may be used widely in various photocatalytic fields for purifying air, purifying water, treating toxic waste water, purifying atmosphere, sterilizing, etc.

The invention discloses a method for preparing a hydrogenated silicon film by utilizing magnetron sputtering. The method comprises the following steps, pretreating a substrate and placing the substrate in a magnetron sputtering filming device; utilizing a plane Si target as a source of Si element; adjusting the power of an intermediate frequency pulse power supply to control the sputtering rate ofthe Si target; utilizing high-purity Ar gas as main ionization gas, and ensuring the effective glow discharge process; and adopting high-purity H2 gas as reaction gas, ionizing the H2, and combiningthe H2 with the Si element, forming the hydrogenated silicon film on the surface of the substrate through deposition, and annealing the film at the temperature of 550 DEG C to 950 DEG C in vacuum to obtain the nano-crystalline/non-crystalline composite structure. The invention achieves regulation and control to microstructure of the hydrogenated silicon film by changing introduction proportion ofhydrogen so as to further change the photoelectric properties of the film. The preparation method is simple and reliable, and the prepared hydrogenated silicon film is hopeful to be applied to solar batteries.

The invention relates to a preparation method and application of a glucose-oxidase-modified mesoporous manganese dioxide composition, and effectively solves the problem of providing new drugs for treating tumor diseases by preparing a glucose-oxidase-modified mesoporous manganese dioxide composition so as to realize synergistic inhibition of tumor cell growth by sonodynamic therapy and starvationtherapy. The preparation method of the glucose-oxidase-modified mesoporous manganese dioxide composition comprises the following steps: modifying surfaces of mesoporous manganese dioxide particles with glucose oxidase through amide bond reaction; physically loading a small-molecular sound sensitizer in pore canals of the mesoporous manganese dioxide, thereby obtaining an internally loaded sensitizer; and then, performing covalent modification on the outer side of the internally loaded sensitizer with glucose-oxidase-modified pharmaceutical composition of mesoporous manganese dioxide nanoparticles. Particle sizes of the glucose-oxidase-modified pharmaceutical composition of the mesoporous manganese dioxide nanoparticles are 100-300 nm; and mass ratio of the glucose oxidase to the manganesedioxide is 1 to 5. The preparation method of the glucose-oxidase-modified mesoporous manganese dioxide composition disclosed by the invention is stable, reliable, and low in cost; and moreover, the glucose-oxidase-modified mesoporous manganese dioxide composition can be used as a magnetic resonance imaging contrast agent for performing real-time monitoring on tumors. Therefore, the glucose-oxidase-modified mesoporous manganese dioxide composition is an innovation in tumor treatment drugs.

The invention relates to a preparation method and application of nano barium sulphate. The preparation method of the nano barium sulphate concretely comprises that barium ions and sulphate ions in specified concentration are added into electrolyte from an anode and a cathode of an electrolysis cell respectively, move at high speed under the action of an electric field by utilizing charged ions and collide to generate barium sulphate precipitate, wherein reaction is quick and intense, then filtering and drying are carried out, so that flaky nano barium sulphate with fine grain size, uniform grain size distribution and stable performance are obtained, and the flaky nano barium sulphate can effectively reflect infrared rays in the sunlight and transmit visible lights when being applied to transparent reflective thermal insulation coating, so that transmitting and thermal insulating functions are realized. The preparation method of the nano barium sulphate is simple, reliable, high in efficiency and good in effect, product quality is stable, and industrial production can be easily realized.

The invention relates to a high temperature alloy material for an engine turbine. The high temperature alloy material comprises components according to weight percentage: 0.22-0.28% of C, 2.1-2.2% of Mn, 0.45-0.61% of Si, 18.3-19.2% of Cr, 8.25-10.4% of Mo, 3.50-3.80% of W, 0.05-0.35% of Al, 0.18-0.27% of Cu, 5.0-9.2% of Fe, 1.0-1.1% of B, 3.15-3.45% of Ti, 6.7-8.2% of Co, 0.12-0.18% of Zr, 1.12-1.38% of Nb, and the balance of Ni and inevitable impurities, and a preparation method which is matched with the material is provided. The prepared blank is reasonable in component design, and is matched with characteristics of reasonable thermal processing technology, convenient production organization, strong field operability and strong apparatus universality, so that the quality of the produced high temperature alloy large-sized turbine disk product is high, the structure property meets the standard requirements, the production efficiency is high, and the economic benefit and the social benefit are obvious.

The invention provides a composite forward osmosis membrane. The composite forward osmosis membrane is prepared by compounding a membrane material and a supporting material; the membrane material is mainly formed by compounding a nano silver-loaded nanotube material and cellulose triacetate; the nanotube material is selected from one or more of boron carbide nanotube with hydrophilic groups, titanium dioxide nanotube with super hydrophilicity, and carboxylic carbon nanotube with hydrophilic groups. The composite forward osmosis membrane can improve the water flow rate, achieves high salt rejection capability, and has antibacterial effect. The invention further provides a preparation method of the composite forward osmosis membrane. The method comprises the following steps: firstly performing surface modification on the nanotube materials, and introducing hydrophilic groups; secondly, loading nano silver on the nanotube materials subjected to surface modification; thirdly, pretreating a supporting material; fourthly, preparing a membrane solution; fifthly, spreading the membrane solution onto the supporting material to obtain a membrane after scraping, coating the surface with gel after a solvent is volatilized, so as to prepare the composite membrane.

The invention discloses a preparation method and application of a rhenium disulfide nanoflake. A single-layer and/or few-layer disulfide nanoflake is prepared by mixing a rhenium source with xanthateand carrying out hydrothermal reaction. The method is characterized in that the large-scale commercially-produced xanthate is selected as a sulfur source; the method has good repeatability and low cost, and can be used for preparing the single-layer and/or few-layer disulfide nanoflake. The nanoflake can be applied to the fields of adsorption, photocatalysis, photodegradation, lubrication, photoelectronic devices and the like.

The invention discloses a neutron filter material and a preparation method thereof. The preparation method comprises 1, orderly carrying out primary compacting molding, sintering and hot isostatic pressure molding on an epithermal neutron filter material, or 2, putting the epithermal neutron filter material into a jacket and carrying out hot isostatic pressure molding, wherein the epithermal neutron filter material comprises at least one of tungsten powder, aluminum powder, titanium powder, boron carbide, titanium oxide, lithium fluoride, aluminum fluoride, gadolinium oxide, gadolinium fluoride, boron nitride, boron oxide, zirconium boride, titanium boride and lithium oxide powder. The neutron filter material has the advantages that 1, the neutron filter material has outstanding filterability and provides a specific energy section and especially provides a neutron beam of an epithermal neutron energy section, 2, the preparation method is reliable, product performances are outstanding, and in boron neutron capture therapy device use, the epithermal neutron filtration satisfies apparatus design indexes, and 3, the large-scale thick neutron filter material can be prepared and machining can be realized.

A polyethylene glycol desulfurization composite membrane filled with activated carbon and a preparation method thereof, comprising dissolving polyethylene glycol in a mixed solution of ethanol and water, stirring evenly, adding activated carbon powder, stirring to disperse evenly, and then adding a crosslinking agent and catalyst, after mixing evenly, static defoaming to obtain the casting solution, pour the casting solution on the polyvinylidene fluoride bottom film to scrape the film, and after the solvent volatilizes, carry out cross-linking to obtain activated carbon-filled polyethylene glycol desulfurization Composite film; Wherein, the mass ratio of Polyethylene Glycol and crosslinking agent is (10-20): 1, and Polyethylene Glycol and catalyst mass ratio are (30-35): 1, and the quality of activated carbon powder is Polyethylene Glycol quality 5‑30% of . The activated carbon-filled composite membrane obtained in the present invention has simple process and convenient operation, and the permeation flux and selectivity of the membrane are improved. As long as the process conditions are suitable, better membrane mechanical properties and separation performance can be realized, thereby realizing industrialization. application.

The invention relates to a method for preparing a nano aluminum oxide material modified polymer integral column. The method comprises the following steps of: mixing and stirring a functional monomer, a cross linking agent, pore-foaming agents and initiators uniformly by taking glycidyl methacrylate as a functional monomer and taking ethylidene dimethyl acrylic ester as a cross linking agent; pouring into a silylanization quartz capillary, and carrying out polymerization reaction by thermal initiation; flushing with methyl alcohol fully, thereby obtaining a polymer integral column; pouring a nanometer aluminum oxide-sodium hydroxide solution into an integral column, carrying out polymerization reaction by thermal initiation, and flushing with methyl alcohol fully, thereby preparing a nano aluminum oxide material modified polymer integral column. The integral column prepared by the invention has the advantages of both an organic integral column and nano materials; the preparation method is simple and reliable; the materials have stable performances and good permeability; the introduction of the nano materials is beneficial to improving the separation efficiency, is very suitable for analyzing azo-type of pigments of tony red and the like in beverage samples, and has a great application potential in the field of organism separation and solid phase extraction.

The invention discloses a method for preparing a rhenium diselenide nano-sheet and belongs to the field of preparation of a novel two-dimensional nano material. The rhenium diselenide nano-sheet is formed through reducing a rhenium source and a selenium source through hydroxylammonium chloride by utilizing a hydrothermal method, reacting to obtain rhenium diselenide nano-particles and assembling the rhenium diselenide nano-particles. By adopting the method provided by the invention, the disadvantages of an existing preparation process of the rhenium diselenide nano-sheet that a preparation period is long, the cost is high, the operation is complicated and the like are overcome; the method is simple in production operation and good in repeatability and a reaction period is shortened; raw materials for producing are cheap and easy to obtain; the method has moderate reaction conditions, and energy consumption and cost are reduced, so that the method is suitable for large-scale production; the invention provides a reliable sample preparation method for application of the rhenium diselenide nano-sheet in electrical and optical aspects, and provides more potential scientific evidences and technical supports for enabling the rhenium diselenide nano-sheet to become a novel photoelectric material in the future.

The invention relates to an ODS (oxide dispersion strengthened) high-temperature alloy material for an engine turbine. The high-temperature alloy material comprises the following components in percentage by weight: 0.22-0.28% of C, 2.1-2.2% of Mn, 0.45-0.61% of Si, 18.3-19.2% of Cr, 8.25-10.4% of Mo, 3.50-3.80% of W, 0.05-0.35% of Al, 0.18-0.27% of Cu, 5.0-9.2% of Fe, 1.0-1.1% of B, 6.7-8.2% of Co, 0.12-0.18% of Zr, 1.12-1.38% of Nb, 1.2-2.8% of composite oxide Y-Ti-O nanoparticles and the balance of Ni and inevitable impurities. The invention further provides a preparation method of the material. A prepared blank has the characteristics of reasonable composition design, reasonable hot-working process, convenience for production organization, strong production operability and strong equipment universality, a produced high-temperature alloy large turbine disk product is high in quality, the structure properties meet standard requirements, the production efficiency is high, and the economic and social benefits are remarkable.

The invention discloses a method for preparing a low-VOC glass fiber reinforced polypropylene halogen-free flame-retardant composite material, which comprises the following steps: firstly drying the raw materials; secondly using a twin-screw extruder to melt and blend to prepare glass fiber reinforced polypropylene respectively Masterbatch and hollow glass microbead masterbatch; then the two are mixed and injected through a single-screw injection molding machine to obtain a low-VOC and low-density glass fiber reinforced polypropylene composite material. The composite material obtained by the preparation method of the present invention can catalyze and degrade the VOC in the car efficiently, energy-savingly and environmentally friendly without external ultraviolet light source or equipment; at the same time, hollow glass microspheres coated with a compatibilizer are added, without reducing the strength of the composite material Under the premise, it has good compatibility with glass fiber reinforced PP and can effectively reduce the density. The preparation method provided by the invention is simple and reliable.

The invention discloses a composite sand core for metal mold casting and a preparation method of the composite sand core for the metal mold casting. The preparation method of the composite sand core for the metal mold casting comprises the steps that firstly, a heat-resistant core head is manufactured from ceramic materials or heat-resistant sand blocks; the core head is placed at a corresponding position in a core box; core sand obtained through even mixing of sand, water and an additive is placed in the core box and compacted; and finally, freezing is conducted, and then the composite sand core is obtained. By the adoption of the composite sand core for the metal mold casting and the preparation method of the composite sand core for the metal mold casting, heat transmitted by a high-temperature metal mold to a frozen sand core body can be greatly reduced, the frozen sand core placed in the metal mold can maintain high strength for certain time, so that metal mold casting technological requirements are met, and it is possible that the environment-friendly excellent-performance frozen sand core can be applied to metal mold gravity casting, low-pressure casting and the like.