43results about How to "Improve temperature resistance" patented technology

This invention provides a peelable coating composition for achieving a Fresnel lens effect through heat pressing, comprising the following components in parts by weight: 20-50 parts of polyurethane resin with active groups; 2-6 parts of solid acrylic resin; 1-3 parts of cellulose ester resin; 1-5 parts of latent curing agent; 0-0.3 parts of additives; and 40-60 parts of solvent; wherein the glass transition temperature (Tg) of the polyurethane resin with active groups is 25-50°C. The advantages of this invention are: the system provided by this invention is highly practical and easy to operate. The low Tg (25-50°C) polyurethane resin with active groups introduced easily reaches its softening point during hot pressing, exhibiting excellent fluidity and effectively filling the fine gratings of the Fresnel lens, resulting in a full replication effect. This polyurethane resin, combined with the latent curing agent, is stable at room temperature; when the hot pressing temperature threshold is reached, a cross-linking reaction is initiated. This mechanism improves the system's temperature resistance and solves the problems of easy adhesion and reflection of low Tg resins in the later stages.

This invention discloses a method for preparing silicon carbide fibers with an in-situ boron nitride coating. The method involves melt spinning a metal-doped polycarbosilane precursor to obtain doped polycarbosilane precursor fibers. These precursor fibers are then subjected to a non-melting treatment in an oxidizing atmosphere to obtain non-melting fibers. The non-melting fibers are then subjected to inorganic pyrolysis to obtain inorganic fibers. These inorganic fibers are then densified and sintered to obtain boron-containing SiC fibers. Finally, the boron-containing SiC fibers are subjected to high-temperature treatment in a nitrogen atmosphere to obtain silicon carbide fibers with an in-situ boron nitride coating. This invention provides a simple preparation method, resulting in an in-situ self-grown BN coating with high crystallinity, good stability, and excellent uniformity. The coating is tightly bonded to the SiC fibers, is low-cost, and can be mass-produced. Furthermore, it significantly improves the fiber's temperature resistance and high-temperature creep resistance, allowing the fiber to serve for extended periods at higher temperatures.

The application discloses an antioxidant composite ceramic aerogel and a preparation method thereof, and belongs to the technical field of composite ceramic aerogels.The main body of the antioxidant composite ceramic aerogel is a silicon nitride aerogel, the nanostructure of the silicon nitride aerogel is one of one-dimensional silicon nitride nanowires and two-dimensional silicon nitride nanobands or a combination of the two nanostructures, and a mullite coating and a copper-nickel metal coating are sequentially coated on the nanostructure of the silicon nitride aerogel from inside to outside.The application can solve the technical problem that the prior art cannot prepare silicon nitride ceramic aerogels which can stably serve in a high-temperature oxygen environment at low cost and in batches.

This invention relates to the field of battery separator materials technology, specifically to MXene-functionalized aramid paper-based battery separators, their preparation methods, and applications. Meta-aramid paper is prepared by wet papermaking using short-cut meta-aramid fibers and precipitated fibers. MXene nanosheets are prepared by hydrofluoric acid etching. Using the meta-aramid paper as a substrate, a functional coating is constructed on the surface of the aramid paper by loading a mixture of para-aramid nanofibers and MXene through a vacuum-assisted filtration-layer-by-layer self-assembly method. The resulting functionalized separator is obtained through protonation reduction. The separator, with its three-dimensional porous protective layer constructed from para-aramid nanofibers and MXene, combines physical barrier and chemical bonding, effectively inhibiting polysulfide shuttle. Furthermore, the highly active sites of MXene can activate inert sulfur-containing substances, improving sulfur utilization. When used in assembling lithium-sulfur batteries, the separator achieves an initial discharge capacity of 1244 mAh·g at a constant current density. ‑1 The capacity retention rate is 82% after 200 cycles.

The application discloses an aluminum cover forming method and an aluminum cover and relates to the technical field of aluminum cover manufacturing. The aluminum cover forming method comprises the following steps: S1, placing an aluminum plate into an initial forming die, and forming a macro-domain large curved surface in the middle of the aluminum plate and an initial foot position with the same height as a required foot position on the circumferential edge of the aluminum plate through the extrusion force of a press machine and the initial forming die; S2, placing the aluminum plate preliminarily formed in S1 into a final forming die, and further forming the macro-domain large curved surface formed in the middle of the aluminum plate into a final shape at room temperature through the final forming extrusion pressure of the press machine, and flowing and filling the edge cavity of the final forming die to form an edge through the extrusion of the final forming die, and forming a final foot position shape through the extrusion of the initial foot position; and S3, opening the die to take out the formed aluminum cover. The production of the large-size foot position height aluminum cover can be realized at room temperature, the energy consumption is low, and the aluminum cover is simple and convenient to manufacture.

This invention belongs to the field of synthetic bio-based waterborne polyols, mainly applied to waterborne polyurethane mortar floor coatings. This invention provides a modified castor oil specifically for waterborne polyurethane mortar floor coatings. It achieves waterborne conversion and controllable functionality of castor oil through relatively simple process conditions. Emulsions made from the modified castor oil synthesized by this invention have better storage stability than emulsions made by direct external emulsification of castor oil. Furthermore, it requires less stringent process conditions than chemical grafting of functional groups to improve the hydrophilicity of castor oil, meaning that waterborne conversion and functionality control of castor oil can be achieved under milder conditions.

This application relates to the field of artificial core technology, and discloses a high-temperature and high-pressure resistant artificial core for steam-driven thermal recovery and its manufacturing method. The manufacturing method includes the following steps: thoroughly mixing core particles with a binder to obtain a mixture; molding the mixture into a square columnar core; forming a sealing layer on the outer surface of the columnar core, and installing high-temperature resistant end caps at the inlet and outlet ends of the columnar core to obtain a cemented core; allowing the cemented core to solidify; heating a liquid crystal polymer to complete melting; placing the cemented core into a mold, pouring the liquid crystal polymer into the mold, ensuring the liquid crystal polymer completely submerges the cemented core; applying a set pressure to the mold, maintaining the set pressure, cooling to a set temperature, and then unloading the pressure to completely solidify the liquid crystal polymer to form the artificial core; demolding the artificial core from the mold, and installing valves on the high-temperature resistant end caps. The artificial core produced by this method meets the temperature and pressure requirements of indoor physical simulation experiments for heavy oil thermal recovery.

The invention discloses a high-performance water-based automotive interior adhesive and a preparation method thereof, and relates to the technical field of automotive interior adhesives. The high-performance water-based automotive interior adhesive is prepared from the following components in parts by mass: 30 to 50 parts of modified water-based polyurethane emulsion, 15 to 30 parts of acrylic emulsion, 5 to 15 parts of tackifying resin, 2 to 6 parts of coalescing agent, 0.5 to 3 parts of cross-linking agent, 0.1 to 0.5 part of flatting agent, 0.1 to 0.5 part of defoaming agent, 0.2 to 1 part of thickening agent, 0.05 to 0.3 part of preservative and 10 to 25 parts of deionized water. The water-based polyurethane emulsion is subjected to surface modification through the coupling agent with a specific structure, the bottleneck that the interface bonding force between a traditional water-based adhesive and PP and other low-surface-energy and non-polar base materials is insufficient is broken through, and high peel strength can be achieved without flame, corona or prime coat or other pretreatment procedures on the PP base materials; and the bonding process flow of the automotive interior trim parts is greatly simplified.

The invention discloses a high-strength impact-resistant glass product and a preparation method of the high-strength impact-resistant glass product in the field of glass, and the high-strength impact-resistant glass product comprises the following raw materials in parts by weight: 50-60 parts of SiO2; 10 to 15 parts of Al2O3; 5 to 8 parts of Li2O; 1 to 3 parts of Na2O; 0.5 to 1.5 parts of K2O; 2 to 5 parts of P2O5; 2 to 4 parts of ZrO2; 1 to 3 parts of TiO2; 1 to 2 parts of B2O3; 0.5 to 2 parts of rare earth oxide; 4 to 12 parts of modified SiC particles; and 1 to 3 parts of modified MoAlB particles. The modified SiC particles and the modified MoAlB particles are adopted as a double-phase reinforcing system, the thermal matching performance with a glass matrix is enhanced, and the strength and toughness of the final glass product are greatly improved under the assistance of the structural densification effect of the rare earth oxide.

The application discloses a salt-resistant water-non-dispersible material for oil well cement and a preparation method thereof. The salt-resistant water-non-dispersible material for oil well cement comprises the following components in the form of weight parts: 100 parts of N,N-dimethyl acrylamide, 3-6 parts of acrylic acid, 10-20 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5-15 parts of a cyclic monomer, 0.1-0.4 parts of a branching agent, 5-15 parts of a cationic monomer, 0.3-3 parts of a crosslinking agent and 400-500 parts of water. The salt-resistant water-non-dispersible material prepared by the application has good salt resistance, can significantly improve the anti-dispersion performance of the cement slurry when used in a salt water and sea water cement slurry system with a NaCl content of 18 wt% or less, and has excellent rheological performance.

This invention relates to the field of oilfield development technology, and discloses a polymer with viscosity-reducing function, its preparation method, and its application. The polymer has the structural units shown in Formulas 1 and 2. Oil displacement agents containing this polymer exhibit high static viscosity reduction, high oil recovery, salt resistance, and high-temperature resistance.

The application relates to the technical field of packaging materials, and discloses a fruit tea sealing cover film with a paper effect, which comprises, from inside to outside, a PE film layer, a PVA film layer and a glassine paper layer; the PE film layer comprises the following components in parts by weight: linear low-density polyethylene 50-60 parts, linear high-density polyethylene 10-15 parts, low-density polyethylene 10-15 parts, ethylene-vinyl acetate copolymer 15-18 parts, a modifier 2-5 parts, an antioxidant 2-4 parts, a compatilizer 0.3-0.5 parts, and dihydroxypropyl octadecanoate 0.5-1.5 parts. The technical scheme can solve the problem of poor temperature resistance of the fruit tea sealing cover film in the prior art.

The application belongs to the field of epoxy resin, and particularly relates to a salt-fog-resistant high-damping epoxy-rubber damping glue for automobiles. The damping glue comprises rubber, epoxy resin and rosin-modified phenolic resin, etc. The rosin-modified phenolic resin is added in the matrix of the rubber and the epoxy resin, so that the peeling strength and the salt-fog-resistant performance of the damping glue can be significantly improved, and a curing agent does not need to be additionally added. The damping glue also has the technical effects of wide temperature range, moisture and heat resistance, etc.

The utility model relates to bridge cable protection structure field discloses a kind of fire-resistant protective structure of bridge cable system, including heat insulation layer, fire-retardant sealing layer and protective layer sequentially arranged from inside to outside, and high-temperature-resistant adhesive glue is equipped between the heat insulation layer with the bridge cable. The heat insulation layer is excellent in thermal stability, and excellent in heat insulation effect;The fire-retardant sealing layer is formed by basalt fiber cloth or high-silica cloth and fire-retardant sealant, and the thickness of fire-retardant sealing layer is 3-6mm, and it is good in high-temperature resistance, fire resistance, vibration resistance and sealing property, and stable in structure;The high-temperature-resistant adhesive glue has excellent temperature resistance, adhesion, moisture resistance and vibration resistance. The protective layer uses silicone high-temperature paint, to further enhance the durability of protective structure. The fire-resistant protective structure of the bridge cable system has clear function, stable performance, easy construction, excellent heat insulation, fireproof and durable performance, and obvious comprehensive advantages.

The application belongs to the technical field of pipe materials, and relates to a high-temperature-resistant and high-wear-resistant pipe and a preparation method thereof. The high-temperature-resistant and high-wear-resistant pipe is a composite pipe with double-layer materials, which is composed of a POK inner pipe as an inner layer and a PE outer pipe as an outer layer. The POK inner pipe as the inner layer is obtained by extruding and shaping POK material after melt blending of POK resin, toughening agent, ABS cooling agent, antioxidant and lubricant at a temperature range of 200-240 DEG C. The PE outer pipe as the outer layer is obtained by extruding and shaping PE material after melt blending of PE resin, antioxidant and lubricant at a temperature range of 170-210 DEG C. The PE pipe as the outer layer tightly wraps the POK pipe as the inner layer, and the POK inner pipe as the inner layer and the PE outer pipe as the outer layer are tightly attached. Compared with the prior art, the application has the advantages of excellent high-temperature-resistant and high-wear-resistant performance, anti-aging performance and high-impact resistance, and low production cost.

The application belongs to the technical field of thermoplastic elastomer modification, and discloses a silane coupling agent modified thermoplastic elastomer and a preparation method thereof, and aims to solve the technical defects of the existing thermoplastic elastomer, such as uncoordinated strength and toughness, poor temperature change resistance, insufficient ultraviolet stability, and poor comprehensive performance coordination. The modified thermoplastic elastomer is prepared by compounding a thermoplastic elastomer base material, a silane coupling agent modification liquid, a boron nitride-kaolin combined agent and other auxiliary agents according to specific weight parts. The preparation process of the application is simple and controllable, the obtained modified thermoplastic elastomer has balanced strength and toughness, a wide temperature change resistance range, excellent ultraviolet stability and outstanding comprehensive performance.

This invention relates to the field of lightning arrester manufacturing technology, specifically to a mold needle for anti-discharge electrode coating, a mold, a mold manufacturing method, and a lightning arrester production method. The mold needle includes a needle rod for forming a discharge gap during lightning arrester production; symmetrical flexible abutment surfaces are provided on both sides of one end of the needle rod. Each flexible abutment surface includes a mounting surface located on the side of the needle rod end and a flexible pad fixed to the mounting surface; the flexible pad includes a concave spherical abutment portion and an extension portion located above the spherical abutment portion; the extension portion is higher than the horizontal plane where the center of the spherical discharge electrode is located; when multiple needle rods are spaced apart, the flexible abutment surfaces on opposite sides of adjacent needle rods are adapted to abut against the spherical surfaces on both sides of the same spherical discharge electrode. By flexibly sealing the spherical surface of the spherical discharge electrode with the flexible abutment surface, the hard contact of the existing mold needle is replaced with a flexible sealing abutment, which solves the problem of silicone rubber coating on the spherical discharge electrode during the vulcanization and composite jacketing of existing mold needles.

The utility model relates to industrial automation detection auxiliary equipment technical field, concretely discloses a kind of electric heat tracing collection devices of guide pressure pipe with multi-station sensing, comprising: control box, as the core control unit of device, the control box bottom end is butted with connecting frame, and connecting frame is installed in the surface of connecting plate, and connecting plate is fixed on the surface of guide pressure pipe by binding bandage;The control box side is equipped with wiring panel, and the connecting frame one end is fixedly connected with control box.This electric heat tracing collection device of guide pressure pipe with multi-station sensing, device includes temperature sensor probe and pressure sensor probe by sensor probe, can carry out multi-parameter real-time acquisition to guide pressure pipe different station, data is transmitted to the control circuit in control box by electric connection, control circuit combines acquisition data intelligent analysis, accurately regulates and controls heating sheet operating state by connecting wire, can be according to guide pressure pipe actual temperature dynamic adjustment heat tracing.

This application provides a phase change thermal conductive material based on block copolymer, which, by weight percentage, comprises the following components: 1.5%-4.0% block copolymer polymer; 0.03%-0.10% antioxidant; 6%-12% nano-monocrystalline diamond powder; 20%-30% aluminum powder; 6%-10% monocrystalline silicon carbide; 8%-12% nano-zinc oxide; 0.01%-0.02% vulcanizing aid; 0.01%-0.02% high-temperature resistant surfactant; 0.15%-0.25% diluent; 0.10%-0.15% high-temperature resistant coupling agent; and 38%-52% high-boiling-point solvent. By modifying the polyolefin polymer through block grafting, the temperature resistance of the phase change thermal conductive material matrix resin is improved while maintaining the resin's thermoplastic properties, providing a more stable and reliable thermal conductive material for the heat dissipation design of large-scale server chips.

The application provides a preparation method of lightweight high-strength hybrid aerogel with controllable electromagnetic performance. The aerogel prepared by molecular structure design of a crosslinking system and a normal-pressure drying method has controllable micro-nano scale pore size, excellent process performance, forms a more stable three-dimensional network structure, and can meet the integrated requirements of heat insulation and wave absorption of large-area thermal protection materials of aircrafts.

The invention relates to the technical field of wind power cables, in particular to an offshore wind power cable with a grid reinforcing layer and rated voltage of 155kv, which sequentially comprises a conductor, a semi-conductive nylon tape I, a conductor shield, an EPR insulator, an insulation shield, a semi-conductive nylon tape II, a tinned copper wire shield, a semi-conductive nylon tape III, an inner sheath and an outer sheath from inside to outside, and a grid reinforcing layer is arranged between the inner sheath and the outer sheath. According to the offshore wind power cable with the grid reinforcing layer and the rated voltage of 155kv, the grid reinforcing layer is of a customized terylene woven grid belt structure, after dipping treatment is conducted through special temperature-resistant glue, the performance is stable at the high temperature of 160-200 DEG C, the tensile strength is larger than or equal to 800N / 5cm, compared with an existing common terylene reinforcing belt, the high-temperature tensile strength is improved by 50% or above, and the rated voltage of 155kv is greatly improved. The problem that an existing reinforcing layer is poor in temperature resistance is effectively solved. Through plasma surface cleaning, gradient drying and shaping and precise glue material adaptation, the bonding strength of the grid reinforcing layer and the inner and outer sheaths is remarkably improved, and an integrated structure is formed between the layers.

This invention relates to a dual-modal flexible temperature-strain sensor and its fabrication method. The sensor achieves efficient detection of temperature and strain signals by combining direct ink writing and screen printing processes. The sensor features a unique design, comprising a rigid substrate and a flexible substrate, housing a thermal resistance temperature sensor and a piezoresistive strain sensor respectively, ensuring effective separation and accurate measurement of temperature and strain signals. The use of flexible materials and a FA-BP neural network algorithm based on an improved firefly algorithm enhances stability and measurement accuracy under varying environments. Furthermore, the sensor can still operate normally at high temperatures, outperforming common flexible thin-film materials on the market. This sensor demonstrates significant application potential in smart wearable devices, health monitoring, and industrial automation, providing a new solution for achieving high-precision and high-stability temperature and strain monitoring.

This invention discloses a glycosyl carbon quantum dot oil displacement agent for unconventional oil reservoirs, its preparation method, and its application, belonging to the field of oilfield chemical technology. The preparation of the glycosyl carbon quantum dot oil displacement agent for unconventional oil reservoirs of this invention includes: adding a carbon source and a modifier to an alcohol solution, stirring to dissolve, and then carrying out a hydrothermal reaction to obtain the product; wherein the modifier is a ketoxime modifier; this method is simple, low-cost, has controllable particle size, and high yield, making it suitable for industrial application; the obtained carbon quantum dots have a high specific surface area and functional groups such as carboxyl and hydroxyl groups, which can penetrate nanopores and synergistically reduce the oil-water interfacial tension to below 5.0 mN / m; this product has outstanding high-temperature resistance and penetration ability, and can effectively penetrate into the nanopore throat structure of tight reservoirs, significantly improving oil displacement efficiency through interfacial modification, and is particularly suitable for the exploitation of unconventional nano-oil and gas resources.

This invention belongs to the technical field of silicon-based piezoresistive high-pressure sensors, and specifically relates to a dual-island beam membrane high-pressure sensor chip and its fabrication method. The chip features a dual-island beam on a sensitive membrane; a set of piezoresistive strips are arranged on the upper surface of the dual-island beams, positioned along two center lines of the chip body; the dual-island beams include an island and an island, with their ends connected to the device layer, insulating layer, and support layer via a beam body; the upper surfaces of the islands are flush with the upper surface of the beam body; this significantly enhances the lateral and longitudinal stress difference in the stress concentration area, making the stress concentration effect more pronounced, improving the sensor's sensitivity, and ensuring reliable measurement results under various operating conditions.

The application discloses a kind of based on isoliquiritigenin biological base temperature-resistant antibacterial foam cotton material and preparation method and application thereof, the foam cotton material is obtained by foaming based on the main chain type benzoxazine resin of isoliquiritigenin biological base, with maleic anhydride, foaming agent master batch, the main chain type benzoxazine resin of based on isoliquiritigenin biological base molecular formula as shown below.The application is prepared with the main chain type benzoxazine resin of isoliquiritigenin biological base as organism to obtain the benzoxazine foam with temperature-resistant antibacterial property of body.The foam cotton material of the application has the following advantages: based on the molecular structure of isoliquiritigenin, product has excellent antibacterial property;High crosslinking density benzoxazine gives product excellent temperature resistance;The product thermal conductivity is as low as 0.033W / (m·K), and the product has wide application in medical equipment, electronic equipment, new energy automobile and other fields.

The application provides a two-dimensional electro-hydraulic servo valve with a simplified hydraulic half-bridge structure, comprising a spool valve assembly connected with an electro-mechanical converter through a transmission mechanism, the spool valve assembly comprises a valve body, a valve core and a valve sleeve, the valve sleeve is sequentially provided with a T port, an A port, a P port, a B port and a T port from left to right, characterized in that the valve core is provided with four shoulders from left to right, the second shoulder and the third shoulder are respectively located at the A port and the B port, the middle part of the valve core is provided with a high-pressure flow channel communicated with the P port, the first shoulder is provided with a low-pressure flow channel communicated with the T port in the axial direction of the valve core, the first shoulder is provided with a high-pressure through groove and a low-pressure through groove perpendicular to the axial direction of the valve core, the high-pressure through groove and the low-pressure through groove are staggered, the high-pressure through groove is located at the right side of the low-pressure through groove, the high-pressure through groove is communicated with the high-pressure flow channel, and the low-pressure through groove is communicated with the low-pressure flow channel. The application significantly reduces the use cost and maintenance workload, is suitable for civil fields, and promotes the development of industrialization.

The application discloses a circuit board for an automatic medical injector and a production process thereof, and particularly relates to the technical field of circuit board manufacturing. The circuit board for the automatic medical injector adopts an elastic bending-resistant substrate as a substrate, selects elastic metal as a raw material, adds polyether in synthetic fibers, has good mechanical physical properties and good temperature resistance, and adds plasticizers and organic silicon as an auxiliary. The circuit board has high and low temperature resistance, electrical insulation, oxidation resistance stability, and a reinforcing layer as metal rubber. The structure is stable, and the elastic bending-resistant substrate has good elasticity, toughness and bending resistance. The use of transparent film coating and protective film double-protects the upper surface of the circuit board body, has good protection effect, avoids the phenomenon that the surface of the elastic bending-resistant substrate is damaged due to damage of the transparent film coating, improves the structure of the circuit board body, and improves the safety function of the circuit board body.

This invention relates to a method for preparing and applying a core-shell structured silica plugging agent with a rigid inner structure and a flexible outer structure for marine drilling fluids, belonging to the field of deepwater oil and gas drilling. This invention uses N-vinyl-2-pyrrolidone, dimethyl diallyl ammonium chloride, acrylamide, and 2-acrylamide-2-methylpropanesulfonic acid polymerized and grafted onto the surface of nano-silica to form a core-shell structured silica plugging agent with a rigid inner structure and a flexible outer structure. By utilizing the rigid plugging of nanomaterials and the flexible plugging of polymer deformation, this method effectively seals the micro- and nano-pores of shale and mudstone, thereby maintaining wellbore stability. Simultaneously, it effectively inhibits the secondary formation of hydrates, improving the safety and efficiency of deepwater drilling. Furthermore, the plugging agent of this invention reduces the need for large amounts of thermodynamic inhibitors, saving costs and possessing environmentally friendly properties.

This invention provides an amphoteric crosslinking agent, a copolymer flow modifier, its preparation method, and its application. The invention prepares a multi-carboxyl amphoteric crosslinking agent, which is obtained by polymerizing an enamide monomer, a sulfonic acid monomer, an alkyl methacrylate, and the amphoteric crosslinking agent. The copolymer flow modifier provided by this invention is a hydrophobic crosslinking type high-temperature resistant flow modifier with a temperature resistance up to 240℃, a NaCl salt concentration resistance up to 15%, and a viscosity retention rate of over 80%. It exhibits excellent rheological properties after high-temperature aging and has broad application prospects in the field of high-temperature water-based drilling fluids.