1847 results about "Molybdenum disulfide" patented technology

The invention relates to a high / low-temperature-resistant wear-resistant tear-resistant fluorosilicone rubber compound and a preparation method thereof, and belongs to the technical field of special rubber materials, the high / low-temperature-resistant wear-resistant tear-resistant fluorosilicone rubber compound comprises the following components: raw fluorosilicone rubber, a reactive liquid rubber compatibilizer, a reinforcing filler, a tear-resistant aid, a high-temperature-resistant aid, a vulcanizing agent, an accelerant, an anti-aging agent and an anti-attrition filler, the provided reaction type liquid rubber compatibilizer contains vinyl carboxyl liquid fluorosilicone rubber, the tear-resistant auxiliary agent contains zinc polymethacrylate, the high-temperature auxiliary agent contains vinyl fluorosilane modified carbon nanotubes, and the anti-friction filler contains molybdenum disulfide and layered nano zirconium phosphate which are treated by oxygen plasma. The high and low temperature resistance stability, oil resistance, wear resistance and tear strength of the fluorosilicone rubber are synergistically improved by regulating and controlling the multi-cross-linked network structure of the fluorosilicone rubber, strengthening the interface action of the rubber and the filler and optimizing the composite vulcanization system, meanwhile, structuralization of a rubber compound is prevented by optimizing the preparation process, and the requirement for adaptability to severe working conditions is met.

The invention belongs to the technical field of ceramics, and discloses a preparation method of fracture-resistant and wear-resistant ceramics. The preparation method comprises the following steps: weighing the raw materials in parts by weight; the preparation method comprises the following steps: mixing 40 parts of potassium feldspar, 10 to 25 parts of albite, 1 to 10 parts of kaolin, 1 to 10 parts of serpentine, 5 to 25 parts of dolomite, 2 to 9 parts of nano zirconium oxide, 0.1 to 1 part of nano cerium oxide, 0.1 to 1 part of nano molybdenum disulfide, 0.1 to 0.8 part of silicon carbide fiber, 0.5 to 2.5 parts of polyethylene glycol, 0.1 to 0.6 part of fullerene trifluoromethyl derivative, 0.1 to 3 parts of sodium dodecyl sulfate, 0.1 to 2 parts of sodium tripolyphosphate and 10 to 60 parts of solvent to obtain slurry; and carrying out spray granulation to obtain a blank, carrying out compression molding to obtain a green body, and sintering to obtain the fracture-resistant and wear-resistant ceramic. The breaking strength of the breaking-resistant and wear-resistant ceramic can exceed 70 MPa, and the length of a grinding pit does not exceed 8.5 mm.

The invention relates to the technical field of lubricating coatings, in particular to a low-temperature curing lubricating coating for a fan bearing and a preparation method of the low-temperature curing lubricating coating. The lubricating coating is prepared from the following components in parts by weight: 55 to 65 parts of mixed solvent, 10 to 15 parts of composite bonding resin, 10 to 15 parts of modified lubricating filler, 8 to 12 parts of wear-resistant filler, 0.5 to 3 parts of dispersing agent, 0.5 to 1 part of micronized dicyandiamide, 0.5 to 2 parts of flatting agent, 0.5 to 2 parts of defoaming agent and 0.5 to 1 part of anti-settling agent, wherein the composite bonding resin is prepared from the following components in parts by weight: 10 to 20 parts of organic silicon resin, 15 to 30 parts of novolac epoxy resin, 15 to 30 parts of urethane acrylate and 35 to 45 parts of polyhydroxy polyether resin; the modified lubricating filler is obtained by modifying mixed powder containing molybdenum disulfide and polytetrafluoroethylene. The adhesive force, the wear resistance and the lubricating property of the lubricating coating can be improved, and the curing temperature can be reduced.

The present application relates to the technical field of catalysts and relates to a non-noble metal cathode hydrogen evolution catalyst for PEM water electrolysis and a use thereof. The present application provides a method for preparing a cathode hydrogen evolution catalyst. A nickel-molybdenum heteropoly acid having a specific structure is generated in situ on the surface of a porous carbon material carrier, and is used as a hydrogen evolution catalyst active component precursor, and an in-situ generated nickel-containing molybdenum sulfide active component is subjected to sulfidation treatment to prepare a non-noble-metal-supported cathode hydrogen evolution catalyst, wherein the in-situ generated nickel-containing molybdenum sulfide active component has a hydrogen adsorption free energy similar to that of Pt and catalytic hydrogen evolution activity, the dispersity is good, and the number of active sites is large, thereby reducing the costs of the catalyst; in addition, during the sulfidation treatment of the nickel-molybdenum heteropoly acid, nitrogen or phosphorus atoms in the carrier can be doped into the lattice of molybdenum disulfide, thereby reducing the hydrogen evolution Gibbs free energy of sulfur atoms on an MoS2 crystal basal surface, and more active sites are formed on a sulfur edge and a molybdenum edge, facilitating a hydrogen evolution reaction.

The invention relates to the technical field of optical cable material preparation, and discloses a nano-modified polyethylene optical cable sheath material and a preparation method thereof.The nano-modified polyethylene optical cable sheath material is prepared from, by weight, 80-100 parts of high-density polyethylene, 25-40 parts of EVA resin, 10-15 parts of modified nylon fibers, 5-8 parts of a composite flame retardant, 0.1-1 part of an antioxidant, 0.1-2 parts of a coupling agent and 0.5-5 parts of a lubricant; the modified nylon fiber is a modified molybdenum disulfide reinforced polyamide 6 fiber, and the modified molybdenum disulfide is formed by grafting nano silicon dioxide after modifying dopamine on the surface of molybdenum disulfide; the composite flame retardant is a core-shell flame retardant which takes magnesium-aluminum double hydroxide as a core and a maleic anhydride grafted styrene-ethylene-butadiene-styrene block copolymer as a shell, and a P-N flame retardant is distributed in the core shell. The polyethylene optical cable sheath material is endowed with good mechanical property and flame retardant property.

The invention provides slick water fracturing fluid as well as a preparation method and application thereof. The slick water fracturing fluid comprises chitosan, a polymer matrix, paraformaldehyde and a solvent. In the slick water fracturing fluid provided by the invention, the chitosan and the polymer are fully dissolved, and the main chains of the two polymers are physically interpenetrated and wound. In the presence of paraformaldehyde, a polymer main chain is chemically crosslinked with paraformaldehyde to form a primary network structure. Then, chitosan and molybdenum disulfide can form coordination cross-linking sites, a secondary network structure is obtained, then a multi-network structure which cannot be split is formed, and the viscosity is high; moreover, the components have good solubility in the solvent, are easy to mix on line and are relatively low in preparation cost.

According to the method for preparing the molybdenum disulfide-based piezoelectric catalytic material in the second-level ultra-fast mode, the problems of complexity and high cost existing in a traditional method are solved through combination of ultrasonic treatment, rotary evaporation and magnetic induction heating. The method is simple to operate and short in preparation time, and the efficient molybdenum disulfide-based piezoelectric catalytic material can be prepared in a short time. Meanwhile, the material has excellent catalytic performance and stability and can be widely applied to the fields of electro-catalysis hydrogen evolution reaction, water treatment and the like.

The invention relates to the technical field of electrode materials, in particular to a negative active material and a preparation method thereof, a negative pole piece, a secondary battery or capacitor and an electric energy storage system. The negative electrode active material provided by the invention comprises supported molybdenum disulfide and a carbon nanotube, the supported molybdenum disulfide comprises a reduced graphene oxide carrier and modified molybdenum disulfide loaded on the reduced graphene oxide carrier, the modified molybdenum disulfide comprises molybdenum disulfide and nitrogen-doped carbon, the molybdenum disulfide has a layered structure, and the nitrogen-doped carbon is inserted between layers of the molybdenum disulfide; wherein carbon nanotubes are filled between lamellas of at least part of the supported molybdenum disulfide; the reduced graphene oxide carrier and the carbon nanotubes are provided with etched holes. The negative electrode active material provided by the invention can effectively relieve the problems of volume change and structural collapse of the electrode material in the charge-discharge process, and improve the structural stability and conductivity, so that the capacity and cycle performance of the secondary battery can be effectively improved.

The invention discloses a carbon-doped titanium dioxide nanotube-molybdenum disulfide energy-storage antibacterial material and a preparation method thereof. The preparation method comprises the following steps: carrying out primary anodic oxidation on a clean titanium foil in a mixed electrolyte of ethylene glycol, water and ammonium fluoride; after ultrasonic treatment is carried out in a hydrochloric acid solution for set time, secondary anodic oxidation is carried out, and the mixed electrolyte of the secondary anodic oxidation is the same as that of the primary anodic oxidation; annealing the titanium foil subjected to anodic oxidation twice in an argon atmosphere, putting an annealed sample into a mixed solution of sodium molybdate, a sulfur source and glucose, and carrying out hydrothermal treatment; and the titanium foil subjected to hydro-thermal treatment is cleaned and dried, and the carbon-doped titanium dioxide titanium foil with the surface covered with molybdenum disulfide is obtained. The MoS2-coated carbon-doped titanium dioxide nanotube (TNT-C-atMoS2) with high biocompatibility developed by the invention has a synergistic effect of charge antibiosis and chemical sterilization, so that the problem of intractable biological fouling of a titanium-based metal material in ocean engineering equipment is effectively solved.

According to the composite protective coating for the bolt surface, the preparation method and the application, the composite coating takes a bolt of a common model of an iron tower as a substrate, and a cathode arc ion plating technology and a magnetron sputtering technology are combined; the preparation method comprises the four main steps of substrate surface pretreatment, metal bonding layer preparation, metal nitride bearing layer preparation and surface molybdenum disulfide solid self-lubricating layer preparation. According to the method, reliable preparation of the composite coating on the complex thread surface of the bolt is achieved, the anti-loosening capacity of the bolt is remarkably improved through the low friction coefficient, good bearing capacity and excellent wear resistance, and meanwhile the composite coating further has good corrosion resistance and has wide application prospects in iron towers for communication, electric power and the like.

The invention relates to a low-temperature graphite negative electrode material and a preparation method thereof, and belongs to the technical field of high polymer materials. According to the prepared low-temperature graphite negative electrode material, firstly, the surface of graphite is pre-oxidized through potassium persulfate, phosphorus pentoxide and concentrated sulfuric acid, and then under the action of sodium nitrate, potassium permanganate and hydrogen peroxide, graphite oxide is prepared; then, ammonium molybdate hydrate and thioacetamide are used as a molybdenum source and a sulfur source, graphite oxide is used as a supporting material, a molybdenum disulfide-graphite compound is synthesized, and the conductivity and the cycling stability are improved; secondly, the surface of the negative electrode is coated with amorphous resin carbon / nickel oxide, so that the ion diffusion efficiency of the low-temperature graphite negative electrode material is enhanced, and the electrochemical lithium storage performance is improved in a low-temperature environment; and finally, the surface of the amorphous resin carbon / nickel oxide is coated with a layer of polythiophene film, so that the rate capability of the negative electrode material is improved due to large surface area and high pores.

The invention discloses a metal-doped molybdenum disulfide composite super-smooth coating and a preparation method thereof, and belongs to the technical field of composite super-smooth coatings. The invention discloses a preparation method which comprises the following steps: sputtering metal palladium on a substrate by adopting a direct-current power supply to obtain a metal transition layer, depositing a molybdenum disulfide target on the metal transition layer by adopting a pulsed power supply, and preparing a metal-doped molybdenum disulfide composite super-smooth coating by adopting a double-target co-sputtering mode. The metal nanoparticles and the vertically oriented MoS2 sheet layer in the film are co-grown and have strong interaction to form the T-shaped array type Ag-MoS2 low dangling bond film, dangling bonds can be encapsulated to the maximum extent, the internal order degree of the film is improved, and the number of dangling bonds is reduced; meanwhile, the density and the oxidation resistance are ensured.

The invention discloses an application of a molybdenum disulfide-based piezoelectric catalytic material in a seawater uranium extraction material, and relates to the technical field of seawater uranium extraction, thiourea and sodium molybdate are used as precursors, and a MoS2 nanoflower with a specific 1T / 2H composite crystal structure is constructed through a hydrothermal synthesis technology. The method is placed in a uranyl nitrate solution, ultrasonic treatment is combined, efficient extraction of uranium can be achieved, and the method has potential application to extraction of uranium from seawater. The method is simple in process and environment-friendly, almost does not generate harmful waste in the synthesis process, does not need complex operation, and has good amplification preparation potential.

The invention relates to the technical field of composite boards, and discloses a scratch-resistant PE composite board and a preparation method thereof. The PE composite board is prepared by taking high-molecular-weight polyethylene, low-density polyethylene and medium-density polyethylene as main raw materials, adding functional aids such as a reinforcing filler, a modified polyurethane elastomer and molybdenum disulfide, and carrying out processes such as banburying, hot press molding and cold press molding. Due to the addition of the reinforcing filler, the mechanical property and the surface hardness of the matrix are improved, and the scratch resistance is further improved; the modified polyurethane elastomer is introduced into the matrix as a toughening component, so that not only is the toughness of the matrix improved, but also the scratch resistance of the matrix is improved; due to introduction of molybdenum disulfide, the unique layered structure of molybdenum disulfide can be utilized, the friction coefficient of the matrix is reduced, and then the scratch resistance of the matrix is improved.

The invention relates to the field of design and preparation of powder metallurgy friction materials, in particular to a copper-based powder metallurgy friction material and a preparation method thereof. Raw materials used in the method comprise, by mass, 45%-55% of copper powder, 8%-20% of iron powder, 6%-15% of ferrochromium, 16%-22% of graphite, 0.5%-4% of molybdenum disulfide, 0.5%-4% of tin sulfide and 0.5%-4% of nickel-coated tungsten disulfide, and the mass ratio of the tin sulfide to the nickel-coated tungsten disulfide is (1-2): (1-2). In the nickel-coated tungsten disulfide, the content of nickel is 5-40%; the sum of the total amount of molybdenum disulfide, nickel-coated tungsten disulfide and tin sulfide is less than or equal to 5%. The preparation method comprises the following steps: weighing raw material powder according to the designed components, mixing, pressing and sintering to obtain the product. The composition design has the characteristics of scientificity, simple and controllable process and the like, and the obtained product has excellent tribological performance and completely meets the friction braking requirement of high-speed heavy-load equipment of 400km / h and above.

The invention belongs to the technical field of photoelectric detection, and discloses a heterojunction dual-band photoelectric detector based on a two-dimensional material, which comprises a substrate layer, an insulating layer, a molybdenum disulfide layer, graphene, black phosphorus and a metal electrode, the insulating layer is formed above the substrate layer, the molybdenum disulfide layer is located above the insulating layer, the molybdenum disulfide layer is formed above the insulating layer, no less than two layers of graphene are arranged above the molybdenum disulfide layer, and the top layer is multi-layer black phosphorus; the molybdenum disulfide layer, the graphene and the black phosphorus are in contact through Van der Waals force, a source electrode and a drain electrode of a formed heterostructure are connected with the metal electrode, and the molybdenum disulfide layer and the black phosphorus are isolated through the graphene and do not make contact with each other. In the invention, the intrinsic dark current in direct proportion to the effective transmission volume of the device is greatly reduced, and meanwhile, the current carriers are limited in a two-dimensional plane and are very easy to regulate and control by a local electric field, so that the dark current of the device can be further reduced, and the problem that the detector prepared from most traditional materials needs refrigeration at present can be solved.

The invention relates to the technical field of wastewater denitrification, and discloses a composite carrier and a preparation method and application thereof.The composite carrier comprises molybdenum disulfide of a porous structure, a zirconium metal organic framework grows in situ in the porous structure of the molybdenum disulfide, and graphene is loaded on the surface of the molybdenum disulfide. The composite carrier disclosed by the invention not only can be used as a place for nitrogen removal by microorganisms, but also can improve the nitrogen removal efficiency of the microorganisms.

The invention relates to a preparation method and application of a novel lactic acid detection fluorescent probe, and belongs to the technical field of fluorescent probes. The preparation method of the fluorescent probe comprises the following steps: synthesizing a core-shell type up-conversion nano material CS-UCNPs; carrying out surface modification on the core-shell type up-conversion nano material CS-UCNPs; coupling of the core-shell type up-conversion nano material CS-UCNPs and an L-lactic acid aptamer is carried out; and synthesizing the magnetic molybdenum disulfide nanosheet MoS2. The L-lactic acid aptamer, the core-shell UCNPs and the magnetic MoS2 are combined for high-sensitivity detection of the lactic acid content, and compared with a traditional blood lactic acid detection method, the method has the advantages of being non-invasive, non-invasive and the like; and the technology has the advantages of simplicity in operation, high specificity, quick response and the like, has a wider detection range and a lower detection limit, and is expected to be applied to actual sample detection work.

The invention relates to the technical field of friction plates for vehicles, and particularly discloses a resin-based friction plate for an aluminum-ceramic brake disc and a preparation method of the resin-based friction plate for the aluminum-ceramic brake disc. Steel fibers serve as a main reinforcing phase, the structural strength of the material is improved, and meanwhile the steel fibers are good friction increasing materials; the reduced iron powder can improve the heat-conducting property of the brake pad and reduce the decline of the friction coefficient at high temperature; the red copper powder and the brass powder are good lubricants, the stability of single braking can be improved, and meanwhile abrasion is reduced; the silicon carbide mainly plays a role in increasing the high-temperature friction coefficient; molybdenum disulfide is beneficial for improving the recovery performance after high-temperature decline and reducing abrasion; antimony sulfide is lubricated at high temperature, and the friction coefficient in the decline stage is increased; silicon carbide is a high-hardness material, so that the friction coefficient is increased; the potassium magnesium titanate lamellar crystal improves the damping characteristic of the material and absorbs vibration and reduces noise, and the resin-based friction plate has the advantages of being high in strength, good in heat conduction, stable in friction performance, resistant to abrasion, comfortable in braking and the like and meets the use requirement of an aluminum ceramic brake disc.

The invention provides a heat-storage warm-keeping down-locking layered fabric and a down jacket. The heat-storage warm-keeping down-locking layered fabric sequentially comprises a skin-friendly layer, a liner cloth layer and a heat-storage warm-keeping down-locking layer from inside to outside, and the heat-storage warm-keeping down-locking layer is prepared by napping a heat-storage warm-keeping fabric; yarns for weaving the heat-storage and warm-keeping fabric are heat-storage and warm-keeping fiber / hollow polyester fiber / wool fiber blended yarns; the heat-storage warm-keeping fiber comprises polyester and a heat storage agent, and the preparation method of the heat storage agent comprises the following steps: firstly loading a polyethylene glycol / nano molybdenum disulfide composite material by adopting porous silicon dioxide microspheres, then mixing with a mixture containing silica sol and nano metal silver, and performing vacuum drying to obtain the heat storage agent. The heat-storage warm-keeping down-locking layered fabric has excellent heat-storage warm-keeping effects, can lock down, has a good antibacterial effect, and has a very good application effect when being used as a lining fabric of a down jacket.

The invention belongs to the field of wastewater treatment technology and energy conservation and environmental protection, and particularly relates to a preparation method and application of aerogel for selectively separating radionuclide cesium in water. The preparation method comprises the following steps: preparing graphene oxide by using a hydrothermal technology, preparing molybdenum disulfide / GO aerogel by using a hydrothermal synthesis and ultrasonic technology, and inlaying and growing Prussian blue (PB) on the surface of the aerogel, so that the problems that PB and MoS2 are easy to agglomerate and difficult to recover are solved, the GO aerogel is endowed with multiple functions, and the constructed PB / MoS2 / GO aerogel is used for selectively separating radionuclide cesium in water. The selective separation performance of the aerogel on the radionuclide cesium in water under different conditions is investigated, efficient enrichment and recovery of the radionuclide cesium are effectively realized by utilizing the ultralight and highly porous characteristics of the aerogel, and the application potential of the aerogel in the aspects of reducing secondary pollution and improving the environmental treatment effect is proved. An efficient and environment-friendly solution is provided for radionuclide wastewater treatment, and the method has a wide market application prospect.

A molybdenum disulfide material having large lattice spacing and a preparation method therefor, a negative electrode, and a battery. The preparation method for a molybdenum disulfide material having large lattice spacing comprises: reacting a composite solution, in which a sulfur source, a molybdenum source and inducing metal ions are mixed, at a temperature maintained at 200-280°C, thereby obtaining a solid-liquid mixture after the reaction is finished; and separating out a solid substance in the solid-liquid mixture, thereby obtaining a molybdenum disulfide material having large lattice spacing, wherein the inducing metal ions are at least one of germanium ions, iron ions, gallium ions, nickel ions and manganese ions. The negative electrode material is prepared by using the preparation method. The negative electrode is prepared from the negative electrode material. The lithium-ion battery comprises the negative electrode. The molybdenum disulfide material having large lattice spacing prepared by using the preparation method has relatively large lattice spacing, and a battery assembled from a negative electrode prepared from same has relatively good electrochemical performance.

The invention discloses anti-attrition lubricating oil suitable for minimal quantity lubrication and a preparation method thereof, and belongs to the technical field of lubricating oil, molybdenum disulfide is nucleated and grows on the surface of porous cerium oxide nanosphere powder to form a cerium oxide and molybdenum disulfide compound, then modified silicon dioxide and tannic acid are pre-polymerized to form silicon dioxide prepolymer powder, and the silicon dioxide prepolymer powder is subjected to ball milling to obtain the anti-attrition lubricating oil suitable for minimal quantity lubrication. The preparation method comprises the following steps: taking a cerium oxide molybdenum disulfide compound as a core material, taking silicon dioxide prepolymer powder and an N-isopropylacrylamide polymer as a shell to obtain a composite temperature-sensitive microcapsule, and mixing the composite temperature-sensitive microcapsule with other raw materials to prepare the composite temperature-sensitive microcapsule. The outer-layer shell polymer chain of the composite temperature-sensitive microcapsule in the anti-attrition lubricating oil shrinks, the cerium oxide molybdenum disulfide compound inside is released, and controllable release of the inner core material is realized by using the temperature sensitivity of the shell polymer of the composite temperature-sensitive microcapsule and the external temperature change during operation.

The invention discloses a wide-temperature-range polyether-ether-ketone-based self-lubricating composite material part for LPBF and a forming method of the wide-temperature-range polyether-ether-ketone-based self-lubricating composite material part, and belongs to the technical field of additive manufacturing. The forming method comprises the steps that polyether-ether-ketone powder and molybdenum disulfide powder are pretreated according to different modes; after pretreatment, the two kinds of powder are mechanically mixed according to a specific proportion, and wide-temperature-range polyether-ether-ketone-based self-lubricating composite material powder is obtained; and carrying out printing forming on the polyether-ether-ketone-based self-lubricating composite material powder by adopting a laser powder bed melting (LPBF) specific process to obtain a wide-temperature-range polyether-ether-ketone-based self-lubricating composite material part. Molybdenum disulfide is adopted to enhance the friction and wear performance of polyether-ether-ketone in a wide temperature range, the printability of powder is improved through special pretreatment, and a high-performance wide-temperature-range polyether-ether-ketone-based self-lubricating composite material part suitable for high and low temperature extreme environments is obtained through forming by adopting specific LPBF processes such as multidirectional cross scanning and the like.

The invention relates to the field of solid lubricating materials of aerospace materials, and particularly discloses a self-adaptive molybdenum disulfide-based multi-layer composite film resistant to low orbit space irradiation and a preparation method of the self-adaptive molybdenum disulfide-based multi-layer composite film. The closed field unbalanced magnetron sputtering technology is adopted, and a bonding layer (Ti), a gradient transition layer (MoS2 / Ti), a functional layer (MoS2 / Ti), a transition layer (MoS2-Ti-C) and a functional layer (MoS2-C) are deposited on a metal material to form the multi-layer composite lubricating film. The prepared lubricating film can reliably serve in a low-orbit space environment, can effectively reduce mechanical abrasion of space mechanical friction moving parts, and can still keep stable tribological performance under long-time irradiation in the low-orbit space. The method is particularly suitable for long-term moving parts such as bearings and gears of new-generation low-orbit service spacecrafts.

The invention discloses an infrared detector with a Van der Waals complementary barrier structure, a preparation method and an application. The structure of the detector is as follows: a P-type Si substrate is used as a substrate of the detector; growing a SiO2 dielectric layer on the P-type Si substrate; the black phosphorus layer covers the SiO2 dielectric layer and is used as a conducting channel; one end of the molybdenum disulfide layer covers one end of the black phosphorus layer, and the other end of the molybdenum disulfide layer is arranged on the SiO2 dielectric layer; the drain electrode is directly prepared on the other end of the black phosphorus layer and is in contact with the black phosphorus layer; the source electrode is prepared at the other end, not overlapped with the black phosphorus layer, of the molybdenum disulfide layer, and electric connection is achieved through overlapping of the molybdenum sulfide layer and the black phosphorus layer. According to the invention, high-sensitivity room temperature detection, ultra-fast response and sensing of multiple physical quantities such as light intensity, polarization and gas are realized, and the method has an application prospect in a miniaturized, low-power-consumption and multifunctional infrared detection system.

The invention belongs to the technical field of all-vanadium redox flow battery diaphragms, and particularly discloses a sulfonated polyetheretherketone / polyaniline composite membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polyetheretherketone and concentrated sulfuric acid, and carrying out water bath heating reaction to prepare a sulfonated polyetheretherketone solid; molybdenum disulfide and methylbenzene are mixed and subjected to ultrasonic treatment, 1, 3-propane sultone is added, oil bath heating is conducted, and sulfonated molybdenum disulfide powder is prepared; the preparation method comprises the following steps: mixing and stirring sulfonated molybdenum disulfide powder, polyaniline and a DMF (Dimethyl Formamide) solution, performing ultrasonic treatment, adding a sulfonated polyether-ether-ketone solid, stirring to obtain membrane casting slurry, coating a glass plate with the membrane casting slurry, drying to form a membrane, and soaking the membrane in a sulfuric acid solution and deionized water in sequence to obtain the sulfonated polyether-ether-ketone / polyaniline composite membrane. The invention discloses a sulfonated polyetheretherketone / polyaniline composite membrane as well as a preparation method and application thereof. The sulfonated polyetheretherketone / polyaniline composite membrane has high proton conductivity, can maintain relatively low vanadium ion permeability and can improve the electrochemical performance of an all-vanadium redox flow battery.

The invention relates to the field of wear-resistant materials, and provides a thermoplastic wear-resistant composite material as well as a preparation method and application thereof, and the thermoplastic wear-resistant composite material comprises the following raw materials in parts by weight: 65-75 parts of polytetrafluoroethylene, 25-35 parts of polyphenylene sulfide, 3-7 parts of modified aramid fiber and 1-5 parts of modified molybdenum disulfide. The thermoplastic wear-resistant composite material provided by the invention has the characteristics of good wear resistance, low friction and high toughness, and can be widely applied to wear-resistant parts related to pump bodies and bearings.

The invention belongs to the technical field of brake pad materials, and aims to solve the problems that the friction coefficient of an existing organic-based brake pad is unstable, so that brake failure is likely to occur, the driving safety is affected, the operation cost is increased due to frequent replacement of the brake pad, and normal operation of rail transit is affected. Therefore, the invention provides the organic track brake pad material with the high friction coefficient and the preparation method thereof. The material comprises 20-30% of thermosetting phenolic resin, 8-15% of bismaleimide resin, 8-12% of polyimide resin, 6-10% of high-strength carbon fiber, 6-10% of aramid fiber, 4-8% of basalt fiber, 3-6% of graphite, 2-5% of molybdenum disulfide, 3-6% of copper fiber, 2-5% of silicon carbide particles, 3-6% of barium sulfate, 2-4% of aluminum oxide, 2-4% of talcum powder, 2.5-5% of a curing agent and 1.5-3.5% of other auxiliaries. The friction performance of the organic track brake pad material is improved under the condition that other performance of the organic track brake pad material is not reduced, the defect of the friction performance of an existing brake pad material is effectively overcome, and reliable guarantee is provided for high-performance safe operation of track traffic.

The invention relates to the technical field of wave absorbing materials, and to a preparation method of a flaky carbonyl iron / molybdenum disulfide composite wave absorbing material and corresponding materials, comprising: adding sodium dodecylbenzene sulfonate, sodium molybdate, and thiourea to an ethanol solution according to a ratio and stirring to obtain a precursor solution; placing the precursor solution in a reactor for hydrothermal reaction to obtain a hydrothermal reaction solution, centrifugally washing the hydrothermal reaction solution to obtain a hydrothermal reaction product, vacuum drying the obtained hydrothermal reaction product to obtain a molybdenum disulfide nanomaterial; mixing the molybdenum disulfide nanomaterial with flaky carbonyl iron according to a ratio and grinding to obtain a mixed powder, bonding the mixed powder to obtain a flaky carbonyl iron / molybdenum disulfide composite wave absorbing material. The preparation method of the flaky carbonyl iron / molybdenum disulfide composite wave absorbing material and the corresponding materials of the invention can prepare a wave absorbing material with excellent electromagnetic wave absorption performance and can meet the absorption requirements of different frequency bands.