58results about How to "Adequate mechanical properties" patented technology

The invention discloses a composite wear-resistant material and a preparation method thereof. The composite wear-resistant material is formed by coating a plurality of layers, namely an adhesive layer, a reinforcing layer and a friction and wear layer in sequence from inside to outside, and curing and molding under vacuum hot-pressing conditions, wherein the adhesive layer, the reinforcing layer or the friction and wear layer consists of a plurality of unit layers of the adhesive layer, unit layers of the reinforcing layer or unit layers of the friction and wear layer with the thickness of 0.10 to 0.50 mm; the material components and the mass fraction of the adhesive layer, the reinforcing layer and the friction and wear layer can be accurately controlled; the preparation process of each unit layer comprises the process links of paving powder, spraying glue, drying and the like; fiber mesh prefabricated pieces are required to be paved when the unit layers of the reinforcing layer is prepared. The novel composite wear-resistant material disclosed by the invention is applied to a bicycle brake pad, and has stable friction and wear performance, high mechanical properties and high adhesive force, so that the comprehensive performance of the overall brake pad is guaranteed.

The invention relates to a high-performance water swellable rubber and a preparation method of the water swellable rubber. The water swellable rubber comprises the following raw materials in parts by weight: 100 parts of a rubber matrix, 1-5 parts of a nitrine coupling agent, 20-60 parts of a water absorbing material and 10-80 parts of a filling agent. The preparation method of the water swellable rubber comprises the following steps of: plasticating the rubber matrix so as to obtain plasticated rubber; subsequently adding the rest materials except for the rubber matrix into the plasticated rubber according to the sequence that small materials are added firstly, large materials are added secondly, and liquid, a vulcanizing agent and an accelerant are added at last, so as to obtain a rubber compound; vulcanizing the rubber compound and preparing so as to obtain the high-performance water swellable rubber. The high-performance water swellable rubber has excellent mechanical properties and high swelling performance, is simple in process of the preparation method, lower in production cost and wide in application range, and is particularly suitable for being used as a sealing material in a working environment of an oil field under high-temperature and high-pressure condition.

The invention discloses lithium iron phosphate water-based positive electrode slurry and a preparation method thereof. The water-based slurry comprises the following components in percentage by mass:40%-50% of lithium iron phosphate powder, 2%-6% of a conductive agent, 2%-5% of a water-based binder, 0.5%-2% of a dispersing agent and the balance of deionized water. The preparation method comprisesthe following steps of: S1, preparing a composite glue solution, S2, preparing a conductive dispersion liquid, S3, preparing a lithium iron phosphate dispersion liquid, S4, mixing and dispersing forthe first time, S5, mixing and dispersing for the second time, and S6, conducting vacuum defoaming and standing. The lithium iron phosphate water-based positive electrode slurry prepared by the methodis uniform in dispersion, good in consistency and stability and convenient to coat; meanwhile, the solvent selected by the slurry is a water-based solvent, so that the slurry is environment-friendly,pollution-free and low in cost; the preparation method is simple and convenient to operate, high in production efficiency and suitable for batch production.

The invention relates to a composite microwave-absorbing material by using porous carbon fiber as an absorbent, and a preparation method thereof. The material is characterized in that: (1) in the composite material, polyacrylonitrile (PAN)-based porous carbon fiber prepared by a blend spinning-high temperature carbonization process is used as a microwave absorbing agent, epoxy resin is used as a substrate, and the microwave absorbing agent is uniformly dispersed in the substrate; (2) the preparation method of the composite material comprises the steps of: at first, adding the ground PAN-based porous carbon fiber into the epoxy resin, and mechanically stirring to uniformly mix the carbon fiber with the epoxy resin to obtain a mixture; then adding a coupling agent, a defoaming agent and a curing agent into the mixture, ultrasonically dispersing for uniformly mixing; and moulding the obtained mixed liquid and curing at room temperature to obtain the composite microwave-absorbing material. The use quantities of the materials are as bellows: on the basis of the overall weight of the composite material, the content of the porous carbon fiber absorbent is 0.5 to 10wt%, the mass ratio of the curing agent to the epoxy resin is 1: (2-4), the use quantity of the coupling agent is 0.5 to 8wt%, and the use quantity of the defoaming agent is 0 to 1wt%. The composite microwave-absorbing material is simple in preparation process and excellent in microwave absorbing performance.

The invention provides oil and gas field fracturing fluid, an oil and gas field well cementation agent and an oil and gas field fracturing temporary plugging agent, which contain PVA (Polyvinyl Alcohol) fibers. The PVA fibers are papered from polyvinyl alcohol with the polymerization degree of 1000 to 3000 and the alcoholysis degree of 80 mole percent to 99.5 mole percent through spinning; the hydroformylation degree eta of the PVA fibers is 25 percent to 35 percent and Rp is 120 DEG C to 180 DEG C. The PVA fibers have the monofilament density of 1.0dtex to 1.8dtex at normal temperature and have the elongation at break of 10 percent to 25 percent; the slenderness ratio of the fibers is 200 to 600 and the real density of the fibers is 0.8g/cm<3> to 1.4g/cm<3>. The yield increasing range of the oil and gas field can reach 30 percent to 50 percent; the strength and toughness of the well cementation agent are remarkably improved and the well cementation agent can also have an anti-leakage effect; when being used in the fractured oil and gas field, the oil and gas field fracturing temporary plugging agent aims at plugging old cracks and breaking new cracks; when the fracturing temporary plugging agent is used, the pressure is raised by 6MPA or above and the yield of the oil and gas field is improved by two times or above.

The invention discloses a carbon nanofiber/diamond composite thin-film material and an application thereof as a thermal battery energy conversion device. A diamond thin-film is deposited on an ordinary silicon wafer substrate by a microwave plasma technology; a silicon substrate is etched away by 20% KOH solution to prepare a self-supported diamond thin-film; a metal thin-film is deposited on the diamond thin-film by an electron beam evaporation-deposition method or a magnetron sputtering method; and a carbon nanofiber layer grows on the metal thin-film. The carbon nanofiber growing by the method has very high absorptivity within a near-total sunlight wave band, and can convert solar radiation energy into thermal energy; and a diamond thin-film substrate has good thermal conductivity, can quickly conduct the heat absorbed by the carbon nanofiber to a thermoelectric energy conversion material of a semiconductor, is integrated with a solar-thermal battery device and achieves high-efficiency solar-electrical energy conversion. The carbon nanofiber/diamond composite thin-film material has good industrial application prospect and basic scientific research value.

The invention relates to a hinge type deformation shrinkage self-resetting unilateral bolt fastener and a mounting tool. The unilateral bolt fastener penetrates through a connecting piece installationhole from one side of a connecting piece, so that fastening connection operation is completed. The unilateral bolt fastener comprises a round-head bolt, a split type gasket, a sleeve, a washer and anut, wherein the split type gasket, the sleeve, the washer and the nut sequentially sleeve the round-head bolt in the axial direction of the round-head bolt; the split type gasket comprises first gasket single bodies, second gasket single bodies and a rubber ring, wherein the first gasket single bodies and the second gasket single bodies are connected end to end to form a ring-shaped structure, and the rubber ring surrounds the outer edge of the ring-shaped structure; the first gasket single bodies and the second gasket single bodies are sequentially arranged alternately in a circumferential direction; the outer periphery of each first gasket single body is connected with the outer periphery of one end of one adjacent second gasket single body through a first hinge, and the inner peripheryof the other end of each first gasket single body is connected with the inner periphery of one end of another adjacent second gasket single body through a second hinge,. Compared with the prior art,the hinge type deformation shrinkage self-resetting unilateral bolt fastener has the advantages of rapidness in installation, detachability and the like.

An insulation material consists of A composition and B composition as A composition is a mixed paste prepared from hydrophobic processed packing, polyolefin sort, acrylic acid series, polyurethane series, 1-4 type of high polymer gelled material of epoxy series and assistants as well as B composition is prepared from cement foamed polystyrene, foamed polyurethane and one any type of granule material from polyolefin series. A composition is mixed with B composition as per ratio of 45-70/50-20 by weight with adding certain amount of water under agitation when they are to be used.

The invention provides a stereoscopic greening construction method and an application thereof. the method comprises the following steps: arranging a waterproof coating on a construction surface, spraying or casting a foam polyurethane layer on the surface of the waterproof coating layer, arranging an irrigation system, punching holes in the foam polyurethane layer or arranging occupying dies before spraying or casting the foam polyurethane layer, and implanting plants with culture media in the holes or the occupying dies. The construction method provided by the invention has a very good application in the aspect of greening construction surfaces, the adopted materials in the method are simple, the operation steps are simple and convenient, the cost is low, and the method is the economic. Through the porous characteristic of the polyurethane, normal growing requirements of plants is met, water permeability and air permeability are achieved, three-dimensional greening is realized, energyconservation and environmental friendliness are achieved, heat preservation, heat insulation and sound insulation are achieved, and water absorption, water storage, water penetration and water purification in rainy days are realized.

The invention provides a high-toughness super-wear-resistance artificial bone for repairing bone defects. The artificial bone has a structure of inner and outer layers, wherein the inner layer is an artificial bone rack made of PEEK resin, and is compounded with barium glass fibers and calcium carbonate whiskers; the outer layer the outer layer of the artificial bone rack is coated with a hardened compact layer which is sintered by bio-active glass ceramics; and a porous layer formed by bioactive glass ceramics is attached to the surface of the compact layer. The bonding performing of bioactive glass ceramics with bone is higher than that of hydroxyapatite, and the bonding performance of PEEK resin with bioactive glass ceramics is better than that of carbon fibers with hydroxyapatite, so that the artificial bone has enough mechanical performance and good biocompatibility, and has the mechanical performance, biocompatibility and bone bonding strength is superior than those of a conventional artificial bone product.

The invention discloses a zinc alloy material. The zinc alloy material is prepared from, by mass, 5.2%-8.25% of iron, 1.25%-2.1% of copper, 1.15%-1.4% of nickel, 0.32%-0.52% of tungsten, 0.12%-0.23% of ruthenium, 0.06%-0.09% of vanadium, 0.23%-0.39% of cobalt, 0.02%-0.06% of beryllium and the balance zinc. The invention further discloses a preparation method of the alloy material. The zinc alloy material is high in mechanical hardness, good in abrasion-resisting effect, extremely excellent in tenacity and extremely suitable for certain mechanical parts having special requirements for the mechanical performance; the zinc alloy material is light, low in cost and quite suitable for application and popularization.

The invention provides a degradable elastomer material and application of the degradable elastomer material to preparation of degradable medical pipes for drainage of human body duct tissue. The degradable elastomer material comprises degradable medical pipes for drainage of ureters, biliary tracts and pancreatic ducts. The adopted material is a composite material formed by two elastomers with different degradation speeds, the material with a lower degradation speed is an L-lactide/epsilon-caprolactone copolymer, and the material with a higher degradation speed is a glycolide/epsilon-caprolactone copolymer. The degradable ureteral stent prepared from the composite material has the advantages of higher tensile strength, controllable degradation time, more stable size after molding, excellent resilience and the like, can meet the degradation speed requirements required by different clinical indications, and can achieve better mechanical properties. The composite elastomer material can also be blended with a medical developer, a processing aid and the like, and a degradable medical tubular object is obtained through extrusion molding.

The invention discloses high-strength alloy which is prepared from the following components in percentage by mass: 3.5-4.25 percent of iron, 8.2-10.39 percent of nickel, 2.5-3.7 percent of manganese, 1.12-1.38 percent of boron, 0.2-0.33 percent of tellurium, 2.5-3.8 percent of tungsten, 0.44-0.62 percent of platinum, 0.18-0.25 percent of scandium, 0.12-0.22 percent of holmium, 0.13-0.19 percent of rhenium and the rest of aluminum. The alloy is prepared by vacuum melting, refining, pressure casting, heat treatment and aging. Due to the reasonable preparation of components and contents, the aluminum alloy has enough mechanical property, particularly the mechanical property suitable for heavy load and high temperature usage environments; meanwhile, the process parameters of pressure casting and the pressure parameters of inert gases during refining are optimally selected, and the mechanical property of the alloy is improved.

The invention discloses a vascularized bone bionic multifunctional tissue engineering scaffold with an anti-inflammatory effect and a preparation method thereof. The vascularized bone bionic multifunctional tissue engineering scaffold mainly comprises four components, namely an HA(at)PLA scaffold, GelMA, DFO-NPs and MnCO. An HA(at)PLA scaffold is prepared through a 3D printing technology and a surface coating manner, a mixed solution of GelMA prepolymer, MnCO and DFO-NPs is injected into the scaffold, UV photocrosslinking is performed to obtain the bionic multifunctional composite scaffold, and according to the bionic multifunctional composite scaffold prepared by combining the components, due to the release of MnCO and DFO-NPs, the bone repair can be well promoted by diminishing inflammation and promoting the formation of blood vessels, and a theoretical basis and technical support are provided for an existing clinical treatment scheme for large-segment bone defect repair.

The invention discloses NBR rubber for welding hoses, which is prepared from, by weight, 150-195 parts of NBR, 10-20 parts of methyl acrylate, 50-55 parts of hydrogenated nitrile butadiene rubber, 10-20 parts of phenylene silicone rubber, 6-9 parts of phthalic dimethyl anhydride, 6-14 parts of coconut oil monoethanolamide, 3-7 parts of butylbenzyl phthalate, 12-14 parts of silicon carbide crystal whiskers, 5-10 parts of epoxy soybean oil, 4-8 parts of a filling agent, 6-9 parts of m-xylylenediamine, 4-8 parts of a silane coupling agent, 1-6 parts of an anti-coking agent, and 3-5 parts of stannous octoate. The NBR rubber for welding hoses is both rigid and flexible, not only has enough mechanical performances but also has excellent flexibility, and has good low temperature resistance and ozone tolerance.

The invention discloses a scale-resistant type salt elimination material-filtering corrugated tube in saline alkali soil and a preparation method thereof. The material-filtering corrugated tube comprises an outer wall tube which is of a corrugated structure and an inner wall tube which is of a smooth structure; a functional hydrophobic layer is sprayed on the inner wall of the inner wall tube; theouter wall tube comprises the following components of high density polyethylene, petroleum resin, organic fiber, calcium carbonate, rosin, calcium stearate, zinc oxide, thiodipropionic acid and chlorinated paraffin; and the inner wall tube comprises the following components of rigid polyvinyl chloride, petroleum resin, calcium carbonate, zinc stearate, vinyl ester resin and talcum powder. The outer wall tube of the material-filtering corrugated tube is both flexible and rigid, so that the corrugated tube has high resistance to a soil load and good flexibility and can be conveniently and continuously laid in the soil; and the functional hydrophobic layer is sprayed on the inner wall, so that the smooth surface of the inner wall tube simultaneously has dual-hydrophobic performance, low adhesion and self-cleaning performance, and the problem that scale deposition is prone to occurring on the inner wall of the material-filtering corrugated tube in the salt elimination process is solved.

The invention relates to a medium-temperature repairing rubber material, a preparation method thereof and an application thereof in a propellant, belonging to the technical field of ablation-resistantmaterials, in particular to a medium-temperature repairing thermal insulating layer material for a high-energy propellant, a thermal insulating layer capable of rapidly vulcanizing at a medium temperature, and a preparation method thereof. The vulcanization system of the invention adopts a vulcanization system of peroxide and accelerator, the thermal insulating material is difficult to absorb nitrate ester, does not affect the ablation performance of the thermal insulating layer, does not affect the interface adhesion performance of the high-energy propellant, and has good adaptability with the interface of the high-energy propellant.

The invention relates to a surface treatment method of an environment-friendly tin-plated steel plate and a steel part made by the method. The surface treatment method comprises the following steps of sputtering one layer of palladium film on the surface of a tin-plated steel plate and carrying out heating treatment. The tin-plated steel plate treated by the method not only has excellent stability, strong mechanical properties and excellent antibacterial properties, but also requires no hexavalent-chromium containing treating liquid strictly restricted on account of environment protection. The method can be broadly used in the field of containers, such as food cans, drink cans, etc.

The invention provides a preparation method of alkali-activated copper slag-based pervious concrete and the alkali-activated copper slag-based pervious concrete. The method comprises the following steps: (1) respectively carrying out dry grinding on copper slag and carbide slag to obtain copper slag powder and carbide slag powder; crushing the red mud, and performing dry grinding to obtain red mud powder; (2) 195-205 parts by weight of copper slag powder and 95-105 parts by weight of water are taken, 0.1-0.2 part by weight of a water reducing agent is added, wet grinding is conducted for 15-25 min, and copper slag slurry is obtained and marked as slurry A; taking 80-83 parts by weight of red mud powder and 160-165 parts by weight of water, and performing wet grinding for 20-40 minutes to obtain red mud slurry which is marked as slurry B; (3) mixing ammonium tartrate, sodium sulfate, lignosulfonate, hydroxypropyl methyl cellulose and wood fiber according to a ratio of 1: 2: 3: 1: 1 to prepare a reinforcing agent; and (4) uniformly stirring 20-40 parts by weight of carbide slag powder, 50-60 parts by weight of the slurry A, 30-40 parts by weight of the slurry B, 2-8 parts by weight of sodium carbonate, 5-15 parts by weight of water, 2-3 parts by weight of a reinforcing agent, 1-2 parts by weight of a water reducing agent, 120-160 parts by weight of river sand, 40-80 parts by weight of copper slag powder and 250-350 parts by weight of coal gangue.

The invention relates to a temporary bearing device installed on a wall and a hydraulic climbing frame support with the temporary bearing device. The temporary bearing device comprises an inner sleeve, an outer sleeve, a wall penetrating bolt, a bolt gasket and a fastener, wherein the wall is provided with a pre-buried hole penetrating through the wall and comprises a first pre-buried hole section penetrating through the solid wall and a second pre-buried hole section penetrating through a heat preservation layer and a concrete slab layer; the inner sleeve is arranged in the pre-buried hole in a penetrating mode, and the outer diameter of the inner sleeve is matched with the inner diameter of the first pre-buried hole section; the length of the outer sleeve corresponds to the length of the second pre-buried hole section, the outer sleeve is arranged on the outer side of the corresponding inner sleeve in a sleeving mode, and the inner diameter of the second pre-buried hole section is larger than the outer diameter of the outer sleeve; the wall penetrating bolt penetrates through the inner sleeve; the bolt gasket is arranged on the bolt in a sleeving mode; and the bolt gasket and the side, corresponding to the solid wall, of the inner sleeve are fixed through the fastener. The temporary bearing device is simple in structure and reasonable in design, force borne by the temporary bearing device is transmitted to the inner side of the wall through the transmission force effect of the inner sleeve and the wall penetrating bolt, and the surface layer of the wall is prevented from being damaged.

The invention relates to a preparation method of a double-layer compound bletilla striata-based dressing, belonging to the technical field of biomedicines. The preparation method comprises the following steps: paving a layer of water-insoluble gelatin sponge medical oxidized cellulose gauze on the surface layer of of the prepared bletilla striata polysaccharide film casting solution a certain concentration, freezing the two into a double-layer film by using a freezing method, and then performing freeze-drying method to obtain the double-layer compound bletilla striata-based dressing, thus effectively solving the problems that the existing bletilla striata-based dressing is soluble in water and difficult to be attached to a wound in clinical medical use. The preparation method is simple intechnology and low in cost, and the two layers of dressings are firmly combined by utilizing mutual penetration and locking of holes between two layers, so that enough mechanical strength in use can be guaranteed. The materials adopted in the preparation method can be degraded and absorbed, thus having no toxicity to a human body.

The invention relates to the field of vehicle tail gas detection equipment, in particular to a mobile automobile emission detection device and a matched station conversion method. The problems that in the prior art, site limitation is large, and working efficiency is low are solved. Detachable container shells are installed on the left side and the right side, a control table and an equipment table are arranged on the front side and the rear side respectively, and an assembled detection platform is installed in the middle. The assembly type detection platform comprises a bottom platform and at least one transition platform installed on the bottom platform, then a vehicle passing area is formed, the two ends of the vehicle passing area are connected with an inlet slope and an outlet slope through hinges, and between the bottom platform and the transition platform, overturning hydraulic mechanisms for driving the transition platforms to switch stations are arranged between the transition platforms; a rotary table is installed on the bottom face of the bottom platform, and rotary table lifting hydraulic mechanisms are further installed at the four corners of the bottom platform. The device has the advantages of being high in flexibility and convenient to move and transfer, and the whole device is provided with a multi-direction displacement space.