71results about How to "Controllable area" patented technology

The invention relates to a method for preparing aqueous solution of single-layer grapheme oxide. The method is characterized by comprising the following steps of: 1, partially stripping the dried grapheme oxide in advance through microwave irradiation; and 2, adding the grapheme oxide which is partially stripped into deionized water and then adding a dispersing agent, stirring, performing oscillation or ultrasonic treatment to prepare the aqueous solution of single-layer grapheme oxide, wherein the microwave output power of the microwave irradiation is continuously adjustable and is 100 to 1,500 watts; the dispersing agent is KOH, NaOH, K2CO3, Na2CO3, NH4HCO3, (NH4)2CO3 or ammonia water; and the dispersing agent is prepared into 1 M of aqueous solution before use and the mass percentage of the ammonia water is 38 percent. The preparation method provided by the invention is low in energy consumption and is an environmentally-friendly and high-efficiency preparation method; the area of the grapheme oxide can be controlled; and the preparation time is less than 10 minutes.

The invention relates to a method for synthesizing a micro-nanometer level hollow polymer ball, a carbon ball and a graphitized ball by one step. The method comprises the following steps that: hydroxybenzene and aldehyde are used as raw materials; lysine is used as a catalyst; fatty alcohol is used as a solvent; a polymer hollow ball with an even dimension can be produced by polymerization at a temperature of 80 DEG C; and the polymer hollow ball is further charred to produce a hollow carbon ball. If Fe<3+> is introduced into the polymer hollow ball, the polymer hollow ball is charred to produce a graphitized hollow ball. Through changing a molar ratio of the hydroxybenzene and aldehyde, the catalyst amount and the type of the solvent, the hollow carbon ball with a grain diameter of between 0.6 and 2 mu m can be produced. The micro-nanometer level hollow carbon ball has an even and controllable grain diameter, high purity, smooth surface, stable performance and high technical added value, is suitable for a load type magnetic separation catalyst, an absorption separating agent of pigment and organic molecule and a separating agent of protein and salt and is used as an electrode material of a super capacitor with high power density and high energy density.

The invention relates to an anode-supported solid oxide fuel cell, a cell stack and a preparation method thereof, which belong to the field of fuel cell materials. The anode-supported tubular solid oxide fuel cell comprises an anode support tube with one end sealed, wherein a bar-shaped ceramic connector layer is arranged on the outer side surface of the anode support tube; a compact electrolyte layer is arranged at the part of the outer surface of the anode support tube without the ceramic connector layer, and the compact electrolyte layer and the bar-shaped ceramic connector layer are adjacent to each other and completely cover the outer surface of the anode outer surface; the anode support tube, the compact electrolyte layer and the ceramic connector layer are integrated through cofiring; and a cathode layer is further arranged outside the compact electrolyte layer and disconnected with the ceramic connector layer. The anode-supported solid oxide fuel cell is easy for stacking and has high operating temperature and generating efficiency; a connector is stable and reliable and has a long service life; as the connector and the anode support tube biscuit are prepared through cofiring, convenience and low cost are realized; and meanwhile, the cell structure with one end sealed achieves internal reforming of fuel, compact structure and high power density are also realized.

The invention relates to a flexible rotary workbench for preparing a physical vapor deposition (PVD) coating on a tool. The flexible rotary workbench comprises a driving rod (1), a lower rotary table (2), an upper rotary table (3), a thrust ball bearing (4) and clamping body fixing rods (8). The thrust ball bearing (4) is arranged between the upper rotary table (3) and the lower rotary table (2). A big gear (5) and pinions (6) are arranged in the upper rotary table (3). The pinions (6) are engaged with the big gear (5). The big gear (5) is in interference fit with the driving rod (1). The upper rotary table (3) is engaged with the pinions (6). A cover plate is arranged at the upper end of the upper rotary table (3). The clamping body fixing rods (8) penetrate through the cover plate (7) and are connected with the pinions (6). The clamping body fixing rods (8) are driven by the pinions (6) to revolve and rotate. Revolution and rotation of the tool to be coated can be achieved through the cooperation of the flexible rotary workbench and a clamping body matched with the workbench, so that the surface of the tool to be coated is evenly coated with required coating materials, and the coating thickness is uniform.

The invention relates to the field of preparation and application of a film material, in particular to a film making method capable of precisely controlling the film thickness and area of a nanometer-thickness film, thereby realizing high-efficiency control preparation of a nanometer-thickness film material with the uniform and consistent thickness. On the basis of the basic principle of a rotary centrifugal type film forming method, a printing spraying nozzle or pin head with a small aperture is used based on a base rotating device; under the conditions of the constant film forming liquid pressure and the controllable motion track, a certain amount of film forming liquid is sprayed on the surface of a film forming base at a certain rate in a micro liquid column manner, so that a uniform liquid film with the controllable thickness, shape, and area is formed; and thus a solid film material is obtained by controlling curing conditions. With the provided method, the high-efficiency and precise control preparation of the nanometer-thickness film material with the uniform thickness is realized. The film making method can be applied to technical fields of photoelectric devices, energy storage devices, protective functional coatings, catalytic materials, composite materials and the like widely.

The invention is a multiporous pitch-based carbon microsphere preparing method, including the following steps: adding the pitch-containing organic solvent to glycerol solution containing surfactant, forming a uniform emulsion, then heating and volatilizing the solvent, filtering and drying to obtain pitch micropheres, raising the temperature to 200 deg.C-800 deg.C at an temperature ascending speed of 1 deg.C-5 deg.C/min, oxidizing for 0.5-5 hours, then raising temperature to 900 deg.C-1200 deg..C at a speed of 5 deg.C-10 deg.C/min under the protection of nitrogen gas, carbonizing for 0.5-1 hour, and finally obtaining pitch-based carbon microspheres.

The invention belongs to the field of communication materials, and in particular relates to an adhesive sheet for a copper-clad laminate. The adhesive sheet with a controllable area, a smooth surface, a uniform easy-to-control thickness and suitable toughness and viscosity is prepared by mixing uniformly resin, an inorganic filler and an auxiliary agent, then hot pressing, sintering, turning, and the like. According to actual application scenes, various types of composite adhesive sheets are prepared by selecting of the suitable resin and inorganic filler, and prepregs with various polymer matrixes, different dielectric properties and different surface structures can be well composited. In particular, due to the use of glass fiber and other reinforcing materials, the dielectric properties of the adhesive sheet can be adjusted to a large extent, and the practicability and universality of the adhesive sheet can be effectively enhanced. In the invention, the adhesive sheets and the prepregs are well compatible and strong in adhesion, and a prepared multilayer board has good thermal and mechanical performances, high stability and low hygroscopicity, and can meet comprehensive performance requirements of different communication fields on the copper-clad laminate.

The invention provides preparation and application of boat-fruited sterculia seed residue based sulfur-doped porous carbon. The preparation comprises the following steps: subjecting tea-made boat-fruited sterculia seed residues, which serve as a raw material, and a sulfur dopant to high-temperature carbonization in an inert atmosphere so as to obtain sulfur-doped carbon, and then, carrying out physical activating treatment, thereby obtaining the sulfur-doped porous carbon. According to the preparation and the application, the sulfur-doped porous carbon is prepared by adopting a high-temperature carbonization and physical activation combined method, the method is simple in operation, the process is easy to control, washing is not required after activation, the production cost is reduced, the carbon yield is relatively high, and the method is environmentally friendly; and the prepared sulfur-doped porous carbon is of a nanosheet structure, is controllable in specific surface area and pore size distribution, high in electric conductivity and adjustable in sulfur content and is particularly suitable for being applied to the fields of heavy-metal wastewater treatment, printing and dyeing wastewater adsorption, lithium-sulfur batteries, lithium-ion batteries, sodium-ion batteries, supercapacitors, catalyst loading and the like.

The invention discloses a protein nano-film based on a sulfhydryl and disulfide bond exchange reaction, and an application thereof. The protein nano-film is obtained by reducing a disulfide bond-containing protein with a sulfhydryl-containing reducing agent and performing the exchange reaction on the sulfhydryl group and a disulfide bond. The nano-film has the advantages of preparation in a largearea, simple preparation method, achieving a mechanical strength without crosslinking, good stability, good optical permeability and good adhesion, and can be adhered to various base materials. The nano-film can be used for encapsulating molecules with different sizes to keep the activity of the molecules and realize controllable release.

The invention discloses a laser-assisted graphene tooth 3D printing process. The technique is combined with the graphene and the laser heat treatment technique, a high-quality graphene tooth is obtained through 3D printing, the graphene is added into a tooth base material, the property of the base material is not changed, the coefficient of thermal expansion of the tooth is reduced, the overall mechanical property is improved, and the ultra-intense laser is radiated on the tooth material in the laser heat treatment technique to improve the wear resistance, the metal-ceramic binding tightness and the material density of the tooth material. Based on the laser, the characteristics of instantaneous high temperature, controllable irradiation and short quenching time are provided, the printed graphene tooth not only is accurately fitted with the alveolar ridge of a patient, but also is high in stability, wear resistance and mechanical strength, a plurality of tests like the metal-ceramic binding strength test, the thermal expansion coefficient experiment and the surface roughness test indicate that the graphene tooth prepared through the technique has better properties than the traditional material, and has an industrialized development future.

The invention discloses application of graphite conductive adhesive to prepare a chemically modified electrode or biosensor electrode binder for electrochemical biological sensing detection, wherein, the graphite conductive adhesive comprises the following components by weight percent: 40-60% of an epoxy resin, 20-40% of graphite powder, 10-30% of a diluent and 1.5-3% of an amine curing agent. The graphite conductive adhesive has excellent electrical conductivity, excellent adhesiveness, wide and flat electrochemical window, convenient use, and excellent application prospect in electrochemical biological detection.

The invention relates to a diamond grinding disc and a preparation method thereof, and belongs to the technical field of diamond tools. The diamond grinding disc comprises a disc-shaped base body, first and second diamond tool bits are arranged on the surface of the disc-shaped base body in a spaced manner, the first and second diamond tool bits are in segment shapes, and horizontal projections are each in a shape formed by two parallel arc sides and two straight sides; the connecting line of the midpoints of the two straight sides form the length direction of the first and second diamond toolbits; the edge of one arc side of the first diamond tool bit extends along the outer edge of the base body; one straight side of the second diamond tool bit is arranged to be close to the outer edgeof the base body, and the length direction extends in the radial direction. The diamond grinding disc can be applied to an airport runway, a bridge project, a highway and application places, such as special reinforced concrete, with high requirements for concrete surface grinding smoothness and roughness.

The invention relates to a composite ceramic connector for a tubular solid oxide fuel cell and a preparation method thereof, in particular to a composite ceramic connector for an anode support tubular solid oxide fuel cell and a preparation method thereof, and belongs to the field of fuel cell materials. The composite ceramic connecting body for the tubular solid oxide fuel cell of the present invention is composed of a lanthanum-doped strontium titanate layer and a strontium-lanthanum manganate layer, and the lanthanum-doped strontium titanate slurry is firstly coated with the slurry The material is brushed on the anode, and after drying, the slurry of strontium lanthanum manganate is painted on it, and then co-fired with the anode of the tubular battery to obtain a dense double-layer composite ceramic connector. The invention has the advantages of simple process, low preparation cost, stable and reliable connecting body, firm structure and good combination, and is beneficial to reduce the cost of the tubular SOFC cell stack.

The invention discloses a preparation method of a graphene oxide separation membrane. The preparation method comprises the following steps: dispersing graphene oxide powder in deionized water and preparing the graphene oxide separation membrane with high stability through a cross-flow method. Through controlling the consumption of graphene oxide, the cross-flow separation membrane forming conditions and the effective membrane forming area, the thickness-controllable separation membrane can be obtained. The preparation method disclosed by the invention has the benefits that the ultra-thin graphene oxide separation membrane is creatively prepared by utilizing the cross-flow method, and through the membrane forming process, the stability of the graphene oxide separation membrane in a water phase is enhanced; by utilizing the separation selectivity of the graphene oxide separation membrane, the efficient separation of a mixed dye is realized; the preparation method is the graphene oxide separation membrane forming process which is simple, low in cost and capable of large-scale production. The preparation method disclosed by the invention overcomes the defects of instable structure, too large film thickness and the like of the graphene oxide separation membrane, shows excellent separation performance in dry separation and is huge in industrial prospect.

The invention relates to the field of pipeline interference testing, in particular to testing and testing under high-voltage AC and DC interference, and is mainly used for a new type of corrosion sample fixture structure for electrochemical testing and weight loss testing of samples under high-current and high-voltage conditions . Its structure includes: an insulating seat for containing samples, an insulating cover for fixing the sample and a sealing ring for sealing the insulating seat and the insulating cover. The exposure size and area of ​​the sample in the new corrosion sample fixture are controllable; the sample can be taken out at any time to measure the quality change and surface change; the sample can be connected to a wire, and currents of different directions and sizes can be applied; the fixture body can be reused , It has the advantages of high temperature resistance, acid and alkali corrosion resistance. The fixture is especially suitable for polarization characteristics and corrosion tests of metallic materials in various environments.

The invention provides a photocatalytic film and a method for preparing the photocatalytic film by a vapor deposition method. An existing inorganic film with a porous structure is used as a base filmmaterial, and a precursor containing carbon and nitrogen elements is tiled under the base film material, then calcination is performed under the protection of an inert gas, and the photocatalytic filmis prepared in one step by the vapor deposition of the precursor thermal polymerization. The photocatalytic film has high photocatalytic activity, is convenient for recycling and reuse, and can be applied to the degradation and treatment of soluble organic pollutants in a static or dynamic wastewater with high degradation efficiency. The preparation method of the photocatalytic film is simple inoperation, the precursor and the base material are easy to obtain, the area of the produced photocatalytic film is controllable, and the photocatalytic film with a relatively large area can be prepared. The photocatalytic film and the preparation method of the photocatalytic film are suitable for the actual continuous sewage treatment, and are convenient for popularization and application.

The invention discloses a method for preparing a meso-microporous pure silicon molecular sieve with high specific surface area based on silica white and belongs to the technical field of molecular sieves. The method comprises the following steps of: mixing deionized water, CTAOH (cetyl trimethyl ammonium hydroxide), F127 and sodium hydroxide, stirring at 50 DEG C to form a clear solution; adding silica white; stirring for 1 hour at room temperature to obtain an amorphous gel; transferring the gel to a polytetrafluoroethylene-lined reaction kettle, wherein the molar ratio of NaOH to SiO2 to CTAOH to F127 to H2O is 1:0.94:0.56:0.0036:166.30; performing hydrothermal treatment at 120 DEG C for 12 to 48 hours; subjecting the mixture to washing, suction-filtering and drying; and putting the resulting molecular sieve in a muffle furnace, and heating up to 550 DEG C at a rate of 1 DEG C and maintaining for 4 hours. The molecular sieve prepared by the invention is advantageous in larger specific surface area and pore volume, uniform pore distribution and adjustable pore diameter.

The invention discloses a method for preparing a graphene reinforced bionic tooth material with 3D laser printing. A high-quality denture with excellent mechanical property, low friction characteristic and good biocompatibility is obtained by combining a bionic tooth substrate material, a graphene material, a 3D laser printing technology and a laser glazing technology.

The invention relates to a preparation method of a complex chemical compound, which is characterized in that: degradable dispersion medium is added into the conventional coprecipitated product system, the isolation effectiveness produced by the dehydration and the decarburization of the dispersion medium at a special situation is utilized to prevent the aggregation of grains, thus, the reaction activity of the prepared complex chemical compound can meet the requirements of preparing luminescent materials with high performance based on the special specific surface area, and the grain sizes, the particle size distribution, the morphology, the luminous performance, the coating performance, the anti-deterioration performance and other specifications of the prepared luminescent material can meet optimizations. The preparation method of the complex chemical compound has the advantages of fast and controllable preparation process, easy realization of scale production and favorable product homogeneity.

The invention discloses a preparation method of an organic-inorganic hybrid perovskite thin film. Conductive glass is used as a substrate; a lead sulfide thin film is prepared by adopting an electro-deposition method; the lead sulfide thin film is used as a precursor; an iodine elementary substance is used as an iodizating agent for iodizating lead sulfide into lead iodide; and then the lead iodide reacts with methyl ammonium halide to obtain the perovskite thin film. The method disclosed by the invention can be operated in a large area; a film layer is controllable in area and shape, and an electro-deposition area and shape can be controlled by a method of corroding a conducting plane; a thickness of the film layer is controlled, and the thickness of the film layer can be conveniently controlled by regulating electro-deposition time; chemical components of the film layer are controllable, and the film layers with different components can be obtained by changing a ratio of I to Br in CH3NH3X solution, so that the perovskite thin films with different physical properties are obtained; and the obtained film layer is relatively uniform and has good compactness.

The invention discloses large-pore-volume silicon dioxide with a nanoparticle structure and a preparation method thereof. The large-pore-volume silicon dioxide is a product obtained by performing reaction, thermal activation, washing and supersonic air current cutting on alkaline silicate, a sulfuric acid solution and a dispersant serving as raw materials. The silicon dioxide content (dry base) is over 99.0, the BET specific surface area is between 280 m<2>/g and 450 m<2>/g, the void volume is between 2.0 and 3.6, the secondary particle average particle size is between 5 mum and 6 mum, and the primary particle size is between 10 nanometers and 15 nanometers. The average particle size, pore volume and specific surface area of a product produced with the preparation method are controllable; and large-pore-volume silicon dioxide products with different performances can be prepared according to different uses.