754results about How to "Increase the effective contact area" patented technology

The invention relates to a modified lithium-based composite negative material for a solid state battery and preparation and application of the material. The modified lithium-based composite negative material comprises 50-95 parts of lithium and 5-50 parts of a modified additive by weight; and the modified additive comprises one or multiple nitride or fluoride. The preparation method comprises thatthe lithium and modified additive are mixed, heated to 180-400 DEG C, stirred uniformly, and cooled to the room temperature; and the modified composite negative material is used to the solid state battery, and combined with a solid electrolyte. Compared with the prior art, the lithium metal is mixed with the modified additive by mixing in a heating fusing way, the surface energy of the lithium metal can be reduced effectively, elements including nitrogen and fluorine are introduced in a controllable way, the interfacial resistance between the solid electrolyte and lithium cathode is reduced effectively, the limit current that can be born by the solid electrolyte is increased, the recyclable charge and discharge capacity is improved, and the solid electrolyte and cathode interface is stable for a longer time in the long circulation process.

The invention relates to a rail, especially steel rail for railway or electric trolley. Damp rail comprises rail body, on whose non-working surface connector with convex rib or convex-concave structure is set, constraint body connected with rail body, set corresponding to connector, whose inner surface processes convex rib or convex-concave structure and damping body, set between connector and constraint body or among connector, rail body and constraint body, forms labyrinth constraint damping structure, which is set continuously or distantly along length direction of rail body. The rail can decrease shake generated by rail and control the shake and noise of rail in original source, while alleviate availably steel and wheel attrition generated by liberative energy of rail shaking so that there is good damping and noise reduction effect, and operating life of wheel and rail, safety and amenity of train running is largely improved.

The invention provides a grading three-dimensional porous graphene/titanium dioxide photocatalyst and preparation method thereof. The photocatalyst is composed by a three-dimensional grapheme framework and nano titanium dioxide particles; the grahene is provided with a macroporous structure; titanium dioxide is mesoporous titanium dioxide; the macropores and the mesopores are communicated; the nano titanium dioxide particles are scattered on a grapheme nano sheet; the surfaces of nano titanium dioxide microspheres are wrapped with graphene nano sheets; the macropores of the graphene are filled with the nano titanium dioxide microspheres. The photocatalyst with a three-dimensional structure can not only prevent the graphene sheet layers from stacking, but also scatter titanium dioxide particles excellently, and is high in specific surface area; besides, samples can be used for photocatalysis degradation of methylene blue, and the methylene blue can be fully degraded in 25 minutes. The preparation method provides a new thought for preparation of the photocatalyst, and has a potential application value in the fields of energy sources and environment.

The invention provides a flexible substrate-based micro-needle array for subcutaneous medicament injection. The micro-needle array comprises a substrate made of a flexible material, wherein the substrate comprises a flexible surface layer and a flexible back layer of which the peripheries are fixed; a chamber is formed between the flexible surface layer and the flexible back layer; a plurality of micro-needles are embedded in the flexible surface layer in the substrate; the middle of each micro-needle is provided with a micropore; and the micropores are communicated with the chamber of the substrate so as to form a fluid passage.

The invention relates to a temperature control pile-soil interface direct shear test device which comprises a portal frame, a lateral constant stiffness loading system, a pile-soil interface simulation system, a water circulation temperature control system, a normal loading system and a data collection system. The portal frame mainly provides a counter-force supporting point for the other systems. The lateral constant stiffness loading system comprises a counter-force frame, a spring fixing plate, a spring, a spring guide rod and a loading plate; the pile-soil interface simulation system comprises a pile lateral soil body box and a pile body box; the water circulation temperature control system comprises a constant temperature water tank, a heater, a refrigerator, a circulating water pump, a water guiding pipe, a valve, a flow meter and a temperature sensor; the normal loading system mainly refers to server hydraulic loading. According to the device, pile-soil interface addition temperature stress monitoring testing, hot and cold cycle after-construction pile-soil interface shear-resistance change rule testing and other testing during temperature field changing can be performed, and then energy pile load-carrying performance impact factors are analyzed.

A heatsink module of heat-generating electronic elements on a circuit board is provided. The heatsink module is used to conduct and dissipate the heat generated by heat-generating electronic elements. The heatsink module includes a heat-conducting substrate contacting the heat-generating electronic elements. The heat-conducting substrate is locked on the heat-generating electronic element by a spring fastening. With die elastic force, the spring fastening can continuously press the heat-conducting substrate, such that the heat is conducted from the heat-generating electronic element to the heat-conducting substrate efficiently. Also, a heat pipe is disposed in the heat-conducting substrate, thus shortening the path between the heat pipe and the heat-generating electronic element for conducting heat, and increasing the contact area and improving the heat dissipation.

An anode target is roratably supported by a rotating mechanism having a rotary body and a staionary body. A fitted portion between the rotary body and the stationary body is formed of bearing areas having dynamic pressure type sliding bearings and a non-bearing area having a clearance between the rotary body and the stationary body larger than that in the bearing areas. The rotary body facing the non-bearing area is positioned where a time for heat transfer from the anode target is shorter than the rotary body facing the bearing areas. Thus, the characteristics of heat radiation from the anode target can be improved, and a stable bearing operation can be maintained.

This invention discloses a high-performance metal/graphite composite dyed electrode used in dye-sensitized solar cell and its preparation method, which takes graphite as the basic material that mixes with the small-sized inorganic solid particles, and the mixture is pressed into the porous metal grid under a certain pressure, forming the porous electrode material with high-ratio surface area. The surface resistance of this composite electrode is very small, which can receive the photoelectric transmission properties comparing with the platinum electrode when the effective contact area between graphite and liquid electrolyte in the dye-sensitized nanocrystal solar cell is larger.

The invention belongs to the field of vibration control, and particularly relates to a spring damping vibration isolator for isolating vibrations. The spring damping vibration isolator comprises an upper support plate, an elastic element and a lower support plate, wherein the elastic element is positioned between the upper support plate and the lower support plate; a damping cylinder is arranged below the lower support plate; a liquid damping material is arranged in the damping cylinder; a movable body linked with the upper support plate or lower support plate is arranged in the damping cylinder; and at least part of the movable body is arranged in the liquid damping material. In the invention, the damping cylinder and the movable body are independently arranged under the elastic element, thereby greatly enhancing the system damping, and overcoming the defect of limited contact area of spring and damping material restricted by the space in the damping cylinder in the prior art; and the invention strengthens the sealing performance, thereby greatly enhancing the waterproof property of the vibration isolator. The invention has the advantages of simple structure, stable property and strong applicability, can be widely used for damping in the fields of machinery, rail transportation, bridges, architectural structures and the like, and has obvious economic and social benefits.

The invention relates to a steam air-guide condensation structure for a steaming box. The structure comprises an air deflector, a draught fan and a condensed water collection device; the air deflectorcomprises an upper cover and a lower cover which are vertically buckled, the upper cover and the lower cover are arranged in an enclosing mode to form an air-guide channel, one end of the air-guide channel is the steam inlet end, and the other end of the air-guide channel is the discharge end; the whole upper surface of the lower cover inclines downwards from the discharge end to the steam inletend, a discharge opening is formed in the relative low portion of the upper surface of the lower cover, and the discharge opening is in fluid communication with the condensed water collection device.Accordingly, the condensed water condensed on the inner wall of the air-guide channel can gather at the portion near the discharge opening in the inclination direction of the upper surface of the lower cover and then flow into the condensed water collection device through the discharge opening; in addition, the upper surface of the lower cover is designed to be inclined, the effective contact areaof the steam and the air deflector wall can be increased, formation of the condensed water is promoted, the condensed water is gathered to from big water drops, water-vapor separation of the steam isachieved, and gas obtained after separation is discharged from the discharge opening to form discharged gas.

The invention specifically relates to a CoP/graphene aerogel composite material for high-efficiency hydrogen evolution and a preparation method thereof, and research on the hydrogen evolution performance of the CoP/graphene aerogel composite material. According to the method, hydrogel is prepared by using a simple sol-gel process, and then the CoP/graphene aerogel composite material for high-efficiency hydrogen evolution is prepared by using high-temperature phosphatization process. The CoP/graphene aerogel composite material prepared in the invention has excellent electrocatalytic hydrogen evolution performance.

The invention relates to a graphene-PDMS flexible substrate electrocardiogram dry electrode based on a tip array structure and a preparation method thereof. a graphene-PDMS flexible substrate is designed on a top surface thereof, a paraxylene film is deposited on tip array structure, metal seed layer is sputtered on paraxylene film, a metal lalyer is sputtered on the metal seed layer. The bottom surface of the graphene-PDMS flexible conductive substrate is coated with a conductive silver paste layer. The process of the invention is simple, the cost is low, and the production of the mould is favorable for batch production. The materials such as conductive silver colloid, PDMS, graphene, paraxylene film and sputtered titanium and gold have good biological compatibility, and can effectively inhibit bacteria and reduce skin irritation. The tip array structure designed by the invention has a larger contact area, and can pass through the stratum corneum by directly contacting with the skin,so that contact impedance of the skin-electrode can be effectively reduced, thus obtaining a stable ECG signal.

The invention discloses a method for surface modification of a basalt fibre carrier for purifying water quality. The method comprises the following steps of: firstly roughening the surface of originally smoother basalt fibre by acid etching, wherein the rough surface is beneficial to attaching and fixing the microbes on the surface; and then forming an Si-OH group on the surface of basalt fibre through an advanced oxidation reaction to evidently increase oxygen-containing groups on the surface of basalt fibre, thereby enhancing the wetting property of the surface of basalt fibre; and then depositing Fe<3+> ions on the surface of basalt fibre carrier by using a cation deposition method, wherein the potential on the surface of carrier is boosted; the surface of carrier has positive change to accelerate the fixation of the microbes on the surface of fibre by utilizing electrostatic attraction; and modifying the surface of basalt fibre carrier to enable the surface to have excellent hydrophilic property and microbe loading property and to load more biomass weights, as well as to maintain higher microbial activity for a long time, thereby more efficiently removing the pollutants in the water body through a biological membrane method.

The invention discloses a fan and a wind wheel locking device thereof. The disclosed wind wheel locking device comprises a lock body and a locking disk, wherein the lock body is arranged on a rack of the fan; the locking disk is fixedly connected with a wind wheel of the fan; a lockpin is arranged in a cavity of the lock body; a locking hole cooperated with the lock pin is arranged in the lockingdisk; axial center lines of the lock body and the lockpin are mutually parallel and spaced by a preset distance; the lock body and the lockpin can synchronously rotate around the center line of the lock body; and the lock body and the rack are provided with at least two fixed connection positions. The wind wheel locking device has the advantages of obviously increasing the locking reliability of the wind wheel and prolonging the service life of the wind wheel; in the mean time, under wind action, the back-and-forth rocking range of the wind wheel is obviously decreased; and therefore, the reliability of the wind wheel is increased, the service life of the wind wheel is prolonged and the potential safety hazard of a unit and maintenance personnel is reduced.

The invention discloses a fibrous material with a formaldehyde removal function, and belongs to the technical field of poisonous volatile matter removal. Cation exchange fibers are used as base body materials in the fibrous material, and counting the total mass of the fibrous material by 100%, the fibrous material comprises, by mass, 24.8%-88.95% of the cation exchange fiber, 0.05%-0.2% of surface active agent, and 11%-75% of macromolecule organic amine compound. The preparation method of the fibrous material includes the following steps: (1) preparing steeping liquor according to proportion, (2) adding fibers into the steeping liquor and evenly stirring the fibers, (3) soaking the fibers in the steeping liquor for 2-4 hours under the condition of interval stirring, (4) and fishing out the soaked materials, drying the materials with hot air or natural air. The fibrous material is diversified in application form, has no secondary pollution, and is large in formaldehyde adsorption capacity, high in adsorption speed, simple in preparation process, and low in cost.

The invention provides a subsonic velocity chrysanthemum-shaped nozzle and a water injecting and air pumping device, or an injection type mixer, or a steam injection pressurizing device or a steam injection water heater and other devices equipped with the nozzle. The chrysanthemum-shaped nozzle comprises an inlet section, an outlet section and an extending section which are sequentially connected to form a complete subsonic velocity chrysanthemum-shaped nozzle structure. The water injecting and air pumping device equipped with the subsonic velocity chrysanthemum-shaped nozzle comprises a 1) main stream inlet section, 2) the chrysanthemum-shaped nozzle, 3) a suction chamber and a secondary stream inlet connected with the suction chamber, 4) a diffusion chamber mixing section, 5) a throat part of a diffusion chamber, and 6) a diffusion section of the diffusion chamber. Compared with the existing a large amount of shrinkage tapered nozzles or straight tube shaped nozzles, and the water injecting and air pumping device and other devices equipped with the nozzle. According to the device, the injection coefficients are fundamentally greatly increased according to the mechanism; the working efficiency and adjustable main and secondary stream mixing ratio are greatly increased.

The invention discloses a method and device for immobilizing CO2 in industrial tail gas by enhancing mineral carbonation. The device comprises a packed column absorber, a mineral leaching tank, a carbonation reactor and a belt type filter. The method comprises the steps of: enabling the industrial tail gas containing CO2 to enter the packed column absorber filled with immobilization carbonic anhydrase, rapidly transforming the CO2 into HCO3<-> under the catalysis action of the carbonic anhydrase; with a weak acidic solution containing the HCO3<-> as a mineral leaching agent, effectively leaching calcium ions from minerals in the mineral leaching tank under the action of ultrasonic waves to form a slurry enriching Ca<2+>; introducing the slurry enriching Ca<2+> into the carbonation reactor, adding a calcium-containing alkali material, regulating the pH of the slurry to be 7-9 to ensure that the HCO3<-> is transformed into CO3<2->, and generating a carbonation reaction with the Ca<2+> leached from the minerals to generate CaCO3. The invention can promote the CO2 to be rapidly transformed into the HCO3<->, can promote the calcium ions to be leached from the minerals and the carbonation reaction, and further realizes that the CO2 in the industrial tail gas is immobilized through direct carbonation under normal pressure.

The invention discloses a nickel/cobalt-modified molybdenum disulfide nanoflower material as well as a synthetic method and application thereof and relates to molybdenum disulfide nanoflower materials. The element composition of the nickel/cobalt-modified molybdenum disulfide nanoflower material is nickel/cobalt, molybdenum and sulfur, the material presents flower ball-like spherical morphology, the flower ball-like structure is composed of flake structures; the nickel/cobalt is uniformly distributed on the molybdenum disulfide flakes; the nanoflower diameter is 50-800nm; the nano-flake thickness on the flower ball-like structure is 2-10nm. The synthetic method comprises the following steps: dissolving a molybdenum source and a nickel/cobalt source into water to obtain a mixed solution; adding a vulcanizing agent and a reducing agent into the mixed solution, and dispersing to form suspension; transferring the suspension into a hydrothermal reactor, heating, reacting and then cooling; taking out the black solid obtained in the hydrothermal reactor after cooling, performing centrifugal separation, washing, and performing vacuum drying, thus obtaining the nickel/cobalt-modified molybdenum disulfide nanoflower material of different morphology sizes.

The invention belongs to the technical field of sensors, and particularly relates to a novel ammonia sensor and a preparation technology thereof. The novel ammonia sensor comprises a gas sensitive material and a substrate, wherein the gas sensitive material uniformly coats the surface of the substrate uniformly, and comprises the component of reducing graphene which is wrapped with a cobaltosic oxide composite nano material; the coating thickness of the gas sensitive material is 1micron-100microns. The ammonia sensor is relatively high in responsiveness of an ammonia gas, and meanwhile has the advantages of relatively good selectivity, flexibility and stability and relatively low operation temperature.

The invention discloses a threshold-adjustable quicksilver microfluid inertia switch based on electrowetting, and relates to switches. A top adjustment electrode and a bottom adjustment electrode are respectively deposited on a glass cover plate and a glass substrate, silicon dioxide layers are deposited on the top adjustment electrode and the bottom adjustment electrode, a microchannel is communicated with a liquid trough through butt joint, the tail end of the microchannel changes gradually and gathers to form a micro valve, the liquid trough is communicated with gas-guide tubes on the two sides of the liquid trough, quicksilver micro-droplets are arranged inside the microchannel, one end of a signal electrode penetrates into the liquid trough, and the signal electrode is fixedly arranged on the silicon dioxide layers. According to the threshold-adjustable quicksilver microfluid inertia switch based on electrowetting, an electrowetting method is adopted, the threshold of quicksilver microfluid inertia switch can be adjusted, a 'solid-liquid' contact form is adopted, the stability of the current characteristic is guaranteed, the effective contact area of a switch contact is enlarged, the on resistance is small, the interface circuit is simple, and the overload capacity of the switch is improved. The threshold-adjustable quicksilver microfluid inertia switch based on electrowetting is suitable for the field such as military weapon systems, civil mechatronics and consumer electronics.

The invention relates to a method for rapid, high-efficiency and selective degradation of trace benzopyrene in water. The method comprises the following steps: cutting trace-benzopyrene-containing wastewater having undergone biochemical treatment into water films with a filling material in a catalytic ozonation reactor; allowing the water films to contact with ozone or ozonized air flowing along a reverse direction and to be dissolved; and selectively degrading trace benzopyrene in the wastewater under the preferential adsorption and catalytic oxidation coupling effects of a molecular imprinting filling material. According to the invention, molecular imprinting technology and catalytic ozonation technology are combined, and trace benzopyrene in the wastewater is rapidly, highly efficiently and selectively treated; the absorption rate of ozone is more than 90% in 10 min in the catalytic ozonation reactor, so the removal rate of trace benzopyrene is more than 99%. The method can be widely applied to deep and recycling treatment of a variety of sewage and wastewater containing benzopyrene.

The invention discloses a method for removing the toxicity of tail water of fine chemical biochemical treatment, belonging to the field of sewage treatment methods. The method comprises the following treatment steps: (a) carrying out catalytic ozonation, specifically, treating sewage in a catalytic ozonation tower which is internally filled with an iron-aluminum catalyst, wherein the iron-aluminum catalyst is prepared from the following effective components: beta-iron oxyhydroxide and aluminum oxide; (b) absorbing, specifically, carrying out further treatment on wastewater, subjected to treatment in the step (a), by using an absorption filter filled with ceramsites and magnetic resin, wherein the mass ratio of the beta-iron oxyhydroxide to the aluminum oxide in the iron-aluminum catalyst is equal to (15-20) to (80-85), and the volume ratio of the ceramsites to the magnetic resin is equal to (2-3) to (3-5). The method provided by the invention is simple to operate and low in cost, and not only can realize the non-toxic emission of the tail water, but also can improve the comprehensive index of water quality.

The invention discloses a preparation method of a superfine cadmium sulfide particles-sensitized titanium dioxide nanotube array, comprising the following steps of: 1) pretreating the surface of a substrate material, carrying put anodic oxidation to obtain pure TiO2-NTs by taking mixed solution of NH4F and H3PO4 as electrolyte, taking a Ti slice as a working electrode Pt slice and a counter electrode,, and roasting an obtained sample, to obtain an anatase type TiO2-NTs thin film; and 2) ultrasonically treating the sample obtained in the step 1), carrying out electro-deposition by taking CdCl2 as electrolyte to obtain Cd/TiO2-NTs, carrying out roasting and thermal oxidation to obtain CdO, carrying out ion exchange in Na2S solution, and withdrawing to obtain CdS/TiO2-NTs. In combination with the electro-deposition and the ion exchange, the superfine CdS particles are evenly dispersed at the tube opening of the TiO2 nanotube array and in the tube, so that the effective contact area between the CdS particles and the TiO2 nanotube array can be increased, therefore, the charge transfer among interfaces can be increased, the photoelectric conversion efficiency is higher, and the activity of the photo-electrically and catalytically degraded organic pollutants can be improved.