21results about How to "Wide operating temperature range" patented technology

The invention relates to the technical field of building waterproof composite materials, in particular to an organic silicon modified resin building waterproof composite material and a preparation method thereof. Comprising a waterproof roll and a waterproof coating arranged on the surface of the waterproof roll, the waterproof coating is prepared from the following components in parts by weight: 20 to 32 parts of silane modified polyether, 15 to 30 parts of organic silicon modified resin, 5 to 10 parts of polysaccharide-based composite polylactic acid, 8 to 12 parts of plasticizer, 1 to 3 parts of curing agent, 0.5 to 2 parts of titanium dioxide and 0.5 to 3 parts of water removal agent. An organic silicon structure in the prepared waterproof composite material has the characteristic of low surface energy, so that the surface of a coating presents strong hydrophobicity, and liquid water permeation is effectively blocked; the waterproof coating can be matched with a compact cross-linked network structure to form a continuous and seamless waterproof film, realizes high hydrostatic pressure resistance and low water absorption, and is suitable for key waterproof parts such as roofs, basements and toilets.

This invention discloses a novel in-situ solid electrolyte and its preparation method, comprising: mixing precursor A and precursor B, and carrying out a hydrolysis-condensation reaction under the action of a catalyst to obtain a POSS-based curing agent with R1 and R2 groups; in an inert environment, sequentially mixing the POSS-based curing agent, a double lithium salt, an organic solvent, and an initiator to obtain a precursor liquid; injecting the precursor liquid into a battery casing and allowing it to stand and soak, so that the precursor solution can fully penetrate the electrode pores; heating the battery after liquid injection at 45-80°C for 4-24 hours to initiate the polymerization and cross-linking of the R2 groups to form a three-dimensional network, and the R1 groups undergo microscopic phase separation to repel the electrolyte phase, constructing ion transport channels in the POSS cross-linked network, while the POSS framework adsorbs and fixes anions, thus forming a solid electrolyte in situ; improving the rate performance of the battery and effectively eliminating the risk of lithium dendrite precipitation under low-temperature fast charging conditions.

The application discloses a kind of special fluorosilicone modified acrylic coatings of anti-fouling and anti-aging unique framework and a preparation method thereof, for the defects of traditional fluorosilicone modified acrylic coatings, such as single molecular framework, difficult to consider anti-fouling and anti-aging performance, poor synergistic effect, etc., by designing the unique three-dimensional molecular framework of "acrylic main chain-fluorosilicone branch-crosslinking framework", optimizing the formula, and using efficient controllable polymerization process, the special fluorosilicone modified acrylic coatings of anti-fouling and anti-aging unique framework is prepared.The formula includes 48-68 parts of unique framework fluorosilicone modified acrylic copolymer, 19-29 parts of anti-fouling and anti-aging pigment and filler and other environmentally friendly components, realizes the synergistic effect of fluorosilicone and the double improvement of anti-fouling and anti-aging, has excellent performance such as surface energy ≤26 mN / m, VOC ≤40 g / L, artificial accelerated aging ≥2000 h, outdoor service life ≥20 years, is convenient to operate and controllable in cost, is suitable for high-end outdoor special coating scenes such as building exterior wall and high-end venue, and can widely replace traditional outdoor coatings.

This invention discloses a locking and release device for a 4D-printed small satellite based on SMA (Super-Magnetic Atomizing) technology, belonging to the fields of aerospace and biomimetic 4D printing technology. The device consists of a main supporting shell 1, a launch platform 2, an auxiliary drive device 3, a locking lever 4, a locking and release spring assembly 5, and an energy storage spring assembly 6. The auxiliary drive device 3 controls the downward movement of the locking mechanism through temperature changes of the inner and outer springs, thereby compressing the energy storage spring assembly 6 and heating it to achieve autonomous energy storage. The launch platform 2 supports the satellite at its upper end and is tightly connected to the energy storage springs at its lower end. The locking and release spring assembly 5 is used to lock the satellite and drive its release. In summary, this invention provides a locking and release device for a 4D-printed small satellite based on SMA, making the failure modes of the satellite launch device effectively controllable and improving the device's adaptability to the extreme environment of space.

The application provides an air conditioning system, an air conditioner and a control method. The air conditioning system comprises a first refrigeration system and a second refrigeration system, the first refrigeration system and the second refrigeration system are arranged in parallel, a regulating condenser is arranged in parallel with the first refrigeration system and the second refrigeration system, the regulating condenser is communicated with a refrigerant storage device, and the first refrigeration system and the second refrigeration system are respectively communicated with the refrigerant storage device; the refrigerant storage device respectively stores the refrigerant from the first refrigeration system, the second refrigeration system and the regulating condenser, or respectively releases the refrigerant into the first refrigeration system, the second refrigeration system and the regulating condenser. The regulating condenser and the refrigerant storage device are added to the original air conditioning system, the refrigerant storage device can regulate the first refrigeration system and the second refrigeration system with different cold energy requirements respectively, the air conditioning system is effectively protected, the system pressure is regulated, and the system load is prevented from being too heavy.

This invention discloses a lanthanum-iron-molybdenum alloy cutting wire and its manufacturing method. The lanthanum-iron-molybdenum alloy cutting wire is made by adding 0.1-0.5% lanthanum nitrate solution and 0.01-0.05% ferric nitrate solution to molybdenum dioxide powder. The manufacturing method involves loading molybdenum dioxide powder into a mixer; mixing the lanthanum nitrate solution and ferric nitrate solution to form a mixture; loading the mixture into a feeder; adding the mixture to the mixer using the feeder while stirring; washing the feeder with pure water, and adding the washed solution to the mixer while stirring; thoroughly mixing and stirring in the mixer for 20-80 minutes; heating and drying after thorough mixing; cooling; and then processing the alloy wire. With a diameter of Φ0.18mm, its tensile strength can reach 2600-3500 N / mm². 2， When used in wire EDM, it is more wear-resistant and has a longer lifespan. Lanthanum-doped iron-molybdenum wire has a high recrystallization temperature, expanding the temperature range and extending the lifespan of the molybdenum wire.

The utility model discloses a zoom projection lens which comprises a first lens assembly, a second lens assembly, a third lens assembly, a diaphragm, a fourth lens assembly and a fifth lens assembly which are sequentially arranged along a direction from an object space to an image space. A full-group linkage zoom design is adopted, and the first lens assembly is set as a zoom group for changing the focal length of the projection lens; the second lens assembly, the third lens assembly, the fourth lens assembly and the fifth lens assembly are arranged to be a compensation group used for offsetting the image surface position change caused by the movement of the zoom group. When zooming is carried out from the telephoto end to the wide-angle end, the distance between the second lens assembly and the third lens assembly is gradually increased. According to the utility model, the space occupied by the lens is reduced, so that the lens can adapt to the working condition of a compact installation space, the lens can maintain excellent imaging performance at different focal lengths within the working temperature range of a special application scene, and the flexible adaptability of the zoom projection lens is improved. The utility model also provides a projection system.

This invention belongs to the field of polymers and relates to a polypropylene roughening film for thin-film capacitors, its preparation method, and a metallized polypropylene film. The polypropylene roughening film comprises modified polypropylene grafted with alkenyl functional monomers, an antioxidant, and a processing aid. The modified polypropylene grafted with alkenyl functional monomers includes structural units derived from polypropylene as the matrix phase and structural units derived from alkenyl functional monomers as the dispersed phase. The ash content of the modified polypropylene grafted with alkenyl functional monomers is less than 50 ppm. The mass ratio of structural units derived from alkenyl functional monomers in the grafted state to structural units derived from alkenyl functional monomers in the self-polymerized state is greater than or equal to 1.0. The D50 of the dispersed phase is less than 450 nm. The film of this invention can maintain good dielectric and energy storage properties at high operating temperatures and is suitable for high-temperature and high-field-strength operating conditions.

The invention relates to a high-performance organic silicon packaging adhesive for a photovoltaic module, the packaging adhesive is an organic high-molecular compound taking a silicon-oxygen bond as a main chain, and a colloidal elastomer is formed after the packaging adhesive is cured; the working temperature range of the packaging adhesive is-55 DEG C to 250 DEG C, the light transmittance of the packaging adhesive in a visible light range is not lower than 92%, and after the packaging adhesive is aged for 1000 hours under the double-85 test conditions of 85 DEG C and 85% relative humidity, the light transmittance retention rate is larger than 95%; the packaging adhesive is prepared from a monomer mixture containing dimethyl dichlorosilane and methyl trichlorosilane through high-temperature reaction, hydrolysis and condensation processes under the action of a composite catalytic system of copper and various high polymer materials, and finally a network polymer with linear and cross-linked structures is formed. The core purpose of the invention is to provide a revolutionary photovoltaic packaging material which is high in light transmittance, extremely stable in chemical property, capable of greatly improving the reliability, the service life and the power generation efficiency of a component, and environment-friendly and recoverable.

This invention discloses an environmentally friendly water-based fire-fighting composite material for thermal runaway protection and its preparation method. The invention uses superabsorbent resin, epoxy resin, and a special fire-fighting liquid as main raw materials, which are mixed and then vibrated to form the composite material. The superabsorbent resin absorbs water to form a gel network, uniformly coating and fixing the special fire-fighting liquid to form a stable honeycomb composite structure. The epoxy resin provides mechanical support and a thermally conductive framework, jointly achieving integrated fire-fighting, heat dissipation, shock absorption, and thermal insulation functions. The material of this invention features flame retardancy, high-efficiency heat dissipation, shock absorption, and strong low-temperature adaptability. It can be filled between battery modules and PACK shells to quickly suppress fire and absorb impact during thermal runaway, while maintaining structural integrity and functional stability over a long period. The material preparation process is simple, environmentally friendly, and non-toxic, making it suitable for the safety protection of new energy battery systems.

The utility model relates to power equipment technical field especially is depth fusion zero sequence voltage sensor, include: three sensing units, three sensing units set up in three solid -sealed pole respectively, correspond three -phase circuit respectively, every sensing unit all includes resistance row, overvoltage protection module and isolation transformer, the resistance row is constituted by multiple resistance series connection, overvoltage protection module is electrically connected in the output of resistance row, isolation transformer's input winding one end is electrically connected in overvoltage protection module, input winding other end connects sensor ground end, isolation transformer's output winding is used for output voltage signal after processing, the output winding of isolation transformer is exported through the aviation socket, and the aviation socket is exported through the aviation plug line, three signals are connected in series, and the signal after series connection is zero sequence voltage signal, realizes the effective, stable, high-precision output of zero sequence voltage.

This invention discloses a method for automatic gyroscope drift compensation in a high-precision optical axis motion control device, belonging to the field of servo turntable control technology. This invention uses a three-axis fiber optic gyroscope mounted on the pitch axis to sense spatial angular velocity. Fiber optic gyroscopes eliminate errors caused by friction from rotating mechanical parts, resulting in high angular velocity measurement accuracy and a wide range of measurable angular velocities. The laser gyroscope used in this invention has a velocity measurement range of ±600° / s and a minimum sensitive angular velocity of less than ±0.001° / s. Fiber optic gyroscopes have a wide operating temperature range, from -50℃ to 60℃, requiring no heating, and exhibit short start-up time and fast system response. This invention proposes a method for automatic gyroscope drift compensation in a high-precision optical axis motion control device, employing a two-stage coarse-fine compensation method to achieve rapid compensation for fiber optic gyroscope drift. It first performs a coarse compensation, followed by up to five (the number of times is configurable) fine compensations. The algorithm is simple and efficient, with short compensation time, and does not consume significant CPU resources for complex calculations, thus improving optical axis stability.

This invention discloses a low-melting-point molten salt energy storage material and its preparation method, belonging to the technical field of physical heat transfer energy storage materials. This method involves introducing modified silicon carbide nanowires and modified sheet-like zinc-aluminum flakes as functional fillers generated through a mercapto-olefin click reaction to composite modify a ternary nitrate molten salt. Compared to the unmodified basic molten salt system, the prepared low-melting-point molten salt energy storage material achieves comprehensive improvements in thermal performance, corrosion resistance, cycle stability, and physical structural stability. Its melting point is approximately 81-93℃, which is lower than that of SolarSalt. Compared to existing mixed molten salts, its melting point is lower to varying degrees, significantly reducing the overall system cost, improving system safety and stability, achieving a wider operating temperature range, and increasing power generation efficiency.

A multi-point array detection system for radioactive waste liquid surface contamination is used to monitor radioactive contamination on the surface of radioactive waste liquid storage tanks. It includes a main frame, a movement control device, detectors, and a host computer. The main frame has multiple mounting holes arranged in a planar array. The movement control device controls the main frame to move closer to or further away from the surface of the radioactive waste liquid storage tank, and to move into or out of the area above the surface. Multiple detectors are installed in the mounting holes of the main frame, with all detectors facing the surface of the radioactive waste liquid storage tank. The host computer is used to adjust the parameters of the CMOS sensors, and to store, display, analyze, and process frame images. This invention, through a detachable array of detectors arranged in a planar array, can cover the entire surface area of ​​the radioactive waste liquid storage tank in one measurement, obtaining a panoramic view of the contamination distribution in a single measurement, reducing the time required for point-by-point detection from several hours to just minutes.

The invention relates to a low-temperature microcrystalline glass sealing material, a preparation method thereof and application of the sealing material to packaging of a PCFC (Poly Crystal Fuel Cell) electric pile, and aims to solve the problems of high use temperature, insufficient crystallization at low temperature and the like when the existing microcrystalline glass brazing filler metal is used for sealing a fuel cell. The preparation method comprises the following steps: 1, taking BaCO3, SiO2, B2O3, MgCO3, SrCO3, Al2O3 and TiO2 as raw materials, and carrying out ball milling; 2, melting the mixed powder at high temperature, and pouring glass melt into deionized water for water quenching to obtain glass particles; and 3, carrying out high-energy ball milling on the glass particles, and screening and drying to obtain the microcrystalline glass sealing material. By adding a certain amount of titanium dioxide, the crystal phase distribution, the microstructure and the use temperature range are effectively improved. The microcrystalline glass prepared by the invention has excellent compactness, chemical stability, thermal cycling stability and reliable sealing performance, and improves the long-term operation life and efficiency of a PCFC cell stack.

The application discloses a secondary electrolyte injection method and an alkali metal ion battery thereof, and the secondary electrolyte injection method comprises the following steps: injecting a first electrolyte into a semi-finished product battery cell and sealing, aging, standing and forming, wherein the first electrolyte comprises an electrolyte salt, a non-aqueous solvent and a basic additive; continuously injecting a second electrolyte, and obtaining an alkali metal secondary battery after secondary sealing and capacity distribution; the second electrolyte comprises the first electrolyte, a first additive and a second additive; the first additive is lithium fluorosulfonate or sodium fluorosulfonate, and the second additive is at least one of a fluorine-containing pyridine compound shown in the following formula (I) or a fluorine-containing imidazole compound shown in the following formula (II), and the specific structure is referred to the description. Through the secondary injection of the first additive and the second additive, the high-temperature cycle performance, the high-temperature storage performance and the low-temperature cycle performance of the battery can be improved, the rate discharge performance of the battery is improved, and the power of the battery is improved.

The application provides a perfluoropolyether-based polyurethane urea elastic sealing material and a preparation method and application thereof, and particularly relates to the technical field of polyurethane urea elastomers. The preparation method of the perfluoropolyether-based polyurethane urea elastomer provided by the application comprises the following steps: mixing bis(1-hydroxymethyl)-terminated perfluoropolyether, isocyanate and dibutyl tin dilaurate, performing a first nucleophilic addition reaction, and obtaining a perfluoropolyether-based polyurethane elastomer; mixing the perfluoropolyether-based polyurethane elastomer, bis(3-aminopropyl)-terminated polydimethylsiloxane and an organic solvent, performing a second nucleophilic addition reaction, adding pentaerythritol, and performing a crosslinking polymerization reaction to obtain a perfluoropolyether-based polyurethane urea elastomer. The application utilizes a "flexible chain two-in-one" strategy to precisely prepare a polyurethane urea elastomer containing a PFPE segment, endows the PFPE type polymer with a structure-function integrated performance, and further expands the application form and use range of the PFPE material.

The utility model relates to a heat insulation structure of a temperature measuring element on the outer wall of a furnace tube of a heating furnace, which is a heat insulation structure for ensuring that a certain space is not influenced by other heat sources in a coke tower in the working process of the petrochemical coke tower. The device mainly comprises a fixing device, an asbestos layer 8, an outer powdery aluminum oxide layer 2, an outer high-temperature glue layer 7, a high-temperature-resistant stainless steel metal layer 6, an inner high-temperature glue layer 5 and an inner powdery aluminum oxide layer 3. All the heat insulation material layers are organically matched to form a multi-layer heat insulation layer, so that the multi-layer heat insulation layer can effectively insulate outside heat in an environment with the temperature of 600 DEG C or above. And the heat insulation layer can be matched with other systems by processing the shape of the high-temperature-resistant stainless steel metal layer, so that the heat insulation layer is only influenced by heat of a certain surface or several surfaces, and the working efficiency of the matched system can be obviously improved.

The invention belongs to the technical field of material preparation, and relates to a polyarylene ether nitrile wear-resistant dielectric composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, synthesizing poly (arylene ether nitrile) matrix resin with a phthalonitrile-terminated biphenyl structure by adopting a nucleophilic substitution reaction, and secondly, introducing a copper phthalocyanine modification layer on the surface of a molybdenum disulfide nanosheet by utilizing a chemical grafting method, so as to prepare the novel functional nanofiller. The cyano group of copper phthalocyanine in the functionalized nanofiller not only can improve the compatibility between the molybdenum disulfide nanosheet and the polyarylene ether nitrile matrix, but also can be chemically crosslinked with the cyano group of the matrix resin, and then the cyano group and the cyano group are combined through a film casting method and then subjected to a solid-phase chemical reaction to prepare the composite material. The molybdenum disulfide nanosheets have the effects of improving the wear resistance and the dielectric constant, and the finally prepared composite material has the advantages of high glass transition temperature, high dielectric constant, excellent wear resistance, low friction coefficient, good processability, simple and efficient preparation process, and suitableness for large-scale production and application.

The application belongs to the field of lithium ion batteries, and particularly relates to a crosslinked organic-inorganic composite nanomaterial modified solid-state polymer electrolyte and a preparation method thereof. The electrolyte composition comprises a polymer matrix, a lithium salt and super-crosslinked organic-inorganic composite fillers. The super-crosslinked organic-inorganic composite fillers are super-crosslinked nanoparticles with a core-shell structure, which are obtained by a Friedel-Crafts reaction using an organic-inorganic copolymer as a reaction monomer. The electrolyte is obtained by uniformly stirring the super-crosslinked organic-inorganic composite fillers, the polymer matrix and the lithium salt in a solvent, and then casting and drying under anhydrous and oxygen-free environment. The solid-state polymer electrolyte has high ionic conductivity and other excellent electrochemical properties, and can be used in a wide temperature range.

The invention discloses a temperature-resistant and moisture-resistant composite material for preparing a bearing retainer and a preparation method of the temperature-resistant and moisture-resistant composite material, and belongs to the technical field of bearing retainers. The composite material is prepared from the following components in parts by weight: 100-120 parts of POM, 10-20 parts of a temperature-resistant additive, 5-8 parts of superfine polytetrafluoroethylene powder, 5-10 parts of filler, 3-4 parts of a compatilizer, 0.3-0.5 part of an antioxidant and 0.2-0.4 part of a lubricant. The bearing retainer prepared from the composite material has excellent temperature resistance and moisture resistance, excellent dimensional stability and good mechanical properties can be kept in a high-temperature, low-temperature or high-humidity environment, and the requirement for long service life of the bearing retainer is met.