150 results about "Molybdenum disulfide" patented technology

A dry gas seal assembly for use with a rotating machine that includes a rotating shaft, the seal assembly comprises a seal face bears a solid coating comprising molybdenum disulfide, graphene oxide, and optionally polydopamine, preferably wherein the graphene oxide to molybdenum disulfide ratio is 8:10 to 10:8. A method for making a dry gas seal assembly comprises coating a homogeneous dispersion of graphene oxide and molybdenum disulfide on a seal face.

The application discloses an electrochemical sensor and a preparation method and application thereof. The electrochemical sensor comprises a three-electrode system composed of a working electrode, a reference electrode and a counter electrode, wherein the working electrode is composed of a base electrode, a molybdenum disulfide nanoparticle modification layer and a polyethylene dioxythiophene layer; the molybdenum disulfide nanoparticles are loaded on the surface of the base electrode through a drop coating method, and the polyethylene dioxythiophene is in-situ loaded on the surface of the molybdenum disulfide nanoparticle modification layer through an electro-polymerization reaction. The electrochemical sensor can be used for detecting lead ions in water bodies, has the advantages of simple preparation, stable performance, suitability for an acidic medium and the like, and is suitable for practical application and popularization.

The present application belongs to the technical field of marine engine bearing bush coating, and discloses a composite treatment method for the surface of a marine heavy-duty engine bearing bush, which comprises bearing bush substrate pretreatment, electroplating treatment, electroplating post-treatment and spraying treatment. The present application breaks through the limitation of single surface treatment technology, uses a tin-nickel alloy electroplating layer as the bottom layer to provide the bearing bush with good basic strength, toughness and impact resistance, and uses a spraying layer containing solid lubricants such as molybdenum disulfide and graphite as the surface layer to endow the bearing bush with excellent compliance, embeddability and self-lubricating performance. The combination of the two perfectly solves the technical problem that the traditional process cannot simultaneously consider strength and surface performance, and is particularly suitable for the complex working conditions of frequent start-stop and power overload of marine heavy-duty engines.

This invention discloses a method for controlling the thermal relaxation path of superconducting nanostructures and its application. This method utilizes a van der Waals integration strategy to sequentially fabricate a molybdenum disulfide layer on a silicon / silicon oxide substrate using chemical solution deposition and a niobium nitride superconducting layer using magnetron sputtering, constructing a niobium nitride / molybdenum disulfide heterostructure with intrinsic anisotropic thermal conductivity. Superconducting nanodevices with specific geometric configurations are designed for this heterostructure. Leveraging the ultra-high in-plane thermal conductivity of molybdenum disulfide and its suppressed out-of-plane heat transfer characteristics, the method achieves directional control of the internal thermal relaxation path of the superconducting nanostructure, verifying its dual advantages of optimizing thermal management and enhancing superconducting performance. The control method of this invention is mature and controllable, effectively transforming disordered thermal relaxation into directional heat transfer, significantly improving the thermal stability and integration density of superconducting devices, and providing a core solution for the thermal management of nanocircuits in fields such as superconducting quantum computing and high-sensitivity quantum detection.

This invention relates to the field of power cable technology and discloses a wear-resistant modified PE sheathed power cable with a braided reinforcement layer. From the inside out, the invention comprises a conductor, an insulation layer, a filler layer, a metal shielding layer, an inner sheath layer, a buffer layer, an armor layer, a double-gradient braided layer, and an outer sheath layer. The buffer layer is filled with nano-magnesium hydroxide particles and hollow glass microspheres to enhance buffering energy absorption and flame retardant performance, resisting external impacts and fire risks. The double-gradient braided layer uses a blended fiber design to enhance tensile strength and dynamic friction reduction, adapting to dragging and stretching conditions. The outer sheath layer, with its helical interlocking structure and graphene molybdenum disulfide modified ridge surface, enhances wear resistance and load-bearing capacity, resisting wear in complex environments. The synergistic effect of each functional layer comprehensively improves the overall performance of the cable.

The application provides a low-friction high-wear-resistance resin-based composite material and a preparation method and application thereof, and belongs to the field of composite materials. The polytetrafluoroethylene nano powder modified by radiation is used together with inorganic filler particles such as graphite nano powder, molybdenum disulfide nano powder and the like to prepare a polyphenylene sulfide-based composite material at a certain compounding ratio. The composite material shows excellent tribological properties. On this basis, by adding a chopped carbon fiber and the like as a reinforcing filler, a high-strength, low-friction high-wear-resistance polyphenylene sulfide-based composite material is prepared by using a multi-scale functional filler network structure constructed inside the composite material. The technical process route of the application is simple, and the manufacturing cost is low. The application can be used for preparing friction protection parts, low-friction wear-resistant structures, wear-resistant bearings, self-lubricating parts, mechanical gaskets and the like under dry friction, and has a very broad application prospect in the fields of aerospace, transportation, electronic devices and high-end mechanical equipment.

This application relates to the technical field of polymer materials, specifically disclosing a polytetrafluoroethylene (PTFE) sealing component and its preparation process. The PTFE sealing component comprises the following raw materials: 80-85 parts PTFE powder, 5-6 parts graphite powder, 6-8 parts glass fiber, 5-6 parts chopped carbon fiber, 4-5 parts ceramic powder, 2-4 parts Y₂O₃@CeO₂ core-shell particles, and 1-3 parts molybdenum disulfide. The preparation process includes the following steps: mixing PTFE powder, graphite powder, ceramic powder, Y₂O₃@CeO₂ core-shell particles, and molybdenum disulfide, ball milling, and drying to obtain a composite powder; uniformly mixing glass fiber and chopped carbon fiber to obtain mixed fibers; alternately layering the mixed fibers and composite powder, with the fiber layer located between two composite powder layers; cold isostatic pressing to obtain a green body; and hot-pressing and sintering the green body, followed by argon plasma treatment to obtain the PTFE sealing component. This application helps reduce the performance degradation of PTFE sealing components under long-term high-temperature environments.

This invention belongs to the field of hydrogen barrier coating technology, specifically relating to a nickel-phosphorus-based amorphous-nanocrystalline composite hydrogen barrier coating and its preparation method. The coating uses a nickel-phosphorus alloy as an amorphous matrix, embedding a composite nano-reinforcing phase composed of core-shell structured phosphide nanoparticles, molybdenum disulfide-metal hydroxide heterostructure two-dimensional nanosheets, and silane coupling agent-modified hexagonal boron nitride nanosheets. The microstructure exhibits a coexistence of amorphous and nanocrystalline phases, with a small amount of alloying elements added to the matrix. This invention involves the controlled preparation of three composite nano-reinforcing phases, which are then combined with nickel salts and a phosphorus source to prepare a uniformly dispersed composite plating solution. This solution is deposited on a pretreated steel substrate to form an amorphous nickel-phosphorus alloy coating, followed by gradient heat treatment to construct the target microstructure. This coating, through multi-phase synergy, enhances substrate adhesion and hydrogen barrier performance, showing promising industrialization prospects in hydrogen energy storage and transportation, and petrochemical equipment protection.

The application relates to the technical field of cables, and discloses a high-strength and high-wear-resistance cable and a preparation method thereof. The high-strength and high-wear-resistance cable comprises, from inside to outside, a conductor, a conductor shielding layer, an insulation layer, a braided shielding layer and a sheath layer. The conductor is composed of multiple tin-plated copper wires. The raw materials of the sheath layer comprise the following components in parts by weight: butadiene styrene rubber 60-80 parts, butyronitrile rubber 20-30 parts, fillers 30-40 parts, molybdenum disulfide 5-8 parts, an activator 4-6 parts, aromatic oil 2-4 parts, an anti-aging agent 3-5 parts, a vulcanizing agent 2-4 parts and a promoter 3-5 parts. The above technical scheme solves the problems of insufficient strength and wear resistance of the cable sheath layer in the related art.

A method for preparing a ferrite solid waste-based electromagnetic wave absorbing material, relating to the field of electromagnetic wave absorbing materials, involves first purifying the ferrite solid waste, then surface-modifying it using a silane coupling agent KH550. Next, MoS2 nanoparticles and the surface-modified ferrite solid waste particles are ball-milled using a high-energy ball mill to obtain a composite electromagnetic wave absorber. The composite electromagnetic wave absorber is then granulated, pressed, and heat-treated to obtain a preform. Finally, the preform is processed to obtain an electromagnetic wave absorbing material of a specific shape. This invention first surface-modifies the purified ferrite solid waste particles, then composites them with molybdenum disulfide through a ball milling process. This preparation process allows for the complementary advantages of the two materials, resulting in an electromagnetic wave absorbing material with higher mechanical properties and superior electromagnetic wave absorption performance.

The present application provides a kind of coating stainless steel welding wire and its preparation method, it is related to welding material field, including welding wire matrix and coating, the coating is coated on the outer surface of the welding wire matrix, by the total mass of the coating, the coating includes the following mass percent of raw materials: base oil 70~85%, molybdenum disulfide 2~5%, graphene 0.5~1%, monocrystalline silicon powder 1.5~3%, potassium borate 10~20%, nano titanium dioxide 0.5~1%.The present application provides a kind of coating stainless steel welding wire and its preparation method, the potassium borate in coating, nano titanium dioxide can improve the arc stability in the welding process, reduce the spatter rate;Molybdenum disulfide, graphene can increase the conductivity of welding wire while also can significantly improve the stability of welding wire feeding;Monocrystalline silicon powder can improve the forming state of weld, the final finished product coating stainless steel welding wire has good wire feeding stability, surface coating uniform and dense, arc stable, welding spatter is small, and the weld forming is good.

This invention provides an ultra-low content monolayer MoS2 composite fiber based on in-situ coating and masterbatch dilution spinning, and its preparation method, comprising the following steps: dispersing monolayer MoS2 nanosheets containing sulfur vacancies in ethylene glycol solvent to obtain a monolayer MoS2 monomer dispersion; mixing the monolayer MoS2 monomer dispersion with terephthalic acid for esterification and polycondensation reaction to obtain a MoS2 / PET nanocomposite masterbatch; thoroughly mixing the MoS2 / PET nanocomposite masterbatch with PET chips to obtain a mixed masterbatch; feeding the mixed masterbatch into a melt spinning device for melt extrusion and stretching to obtain an ultra-low content monolayer MoS2 multifunctional composite fiber. The ultra-low content monolayer MoS2 can endow the ultra-low content monolayer MoS2 multifunctional composite fiber with broad-spectrum antibacterial ability and extremely high photothermal conversion efficiency, realizing the macroscopic amplification of the two-dimensional material properties in a polymer matrix.

The application relates to the application field of metal powder metallurgy technology and discloses a copper-based composite material metal block capable of resisting impact energy and a preparation process and application thereof. The copper-based composite material metal block is used in impact and collision process tests, and impact energy absorption, reduction or elimination is realized by self-pulverization and disintegration. Raw materials of the copper-based composite material capable of resisting impact energy include, in percentage by mass, 1-95% of atomized copper powder, 0-95% of electrolytic copper powder, 1-15% of tin powder, 1-2% of molybdenum disulfide, 0-3% of graphite, 0-7% of phenolic resin, 0-1% of lithium stearate and 0-1% of magnesium stearate. The above raw materials are mixed, secondarily pressed, sintered and electroplated to form the copper-based composite material. When encountering an impacted metal barrier section, the metal block can absorb the counter-impact energy and disintegrate by itself, so that the running speed instantaneously drops to zero, the metal fragment splashing phenomenon does not occur, and the copper-based composite material does not contain lead metal, so that the whole impact and collision process is harmless to the surrounding environment.

This invention relates to the fields of environmental pollution remediation and biocatalysis, and provides a method for preparing a self-supplied H2O2 cathode material via an electroenzyme cascade and its application. The cathode material is an ionic liquid-modified CPO-IL. EMB The bio-hybrid material formed by immobilizing molybdenum disulfide-modified MoS2@Co-CNNT composite material, namely CPO-IL EMB / MoS2@Co-CNNT. An electroenzyme cascade degradation system was constructed using this biohybrid material as the cathode. By controlling the electrode potential, controllable H2O2 generation was achieved while protecting the Fe(III) in the iron porphyrin ring of CPO from reduction, thus maintaining the intrinsic oxidative activity of the enzyme. The in-situ generated H2O2 activates CPO-IL. EMB It efficiently catalyzes the oxidative degradation of mesotrione. This invention requires no external CPO-IL. EMB It is green and environmentally friendly, with high degradation efficiency, and has promising applications in agricultural wastewater treatment and environmental remediation.

This invention belongs to the field of supercapacitor technology, specifically relating to a molybdenum oxide-molybdenum disulfide@polytannic acid electrode material, its preparation method, and its applications. Using molybdenum foil as the current collector and electrode, this invention prepares a molybdenum oxide-molybdenum disulfide electrode using electrochemical oxidation and hydrothermal methods. A polytannic acid coating is deposited on its surface to prepare a biodegradable molybdenum oxide-molybdenum disulfide@polytannic acid electrode. This electrode is then sandwiched with a biodegradable gel electrolyte and encapsulated with a biodegradable encapsulation material to construct a biodegradable supercapacitor with self-discharge suppression capabilities. By depositing a polytannic acid coating on the surface of the supercapacitor electrode, its self-discharge behavior is suppressed. The polytannic acid coating can prevent parasitic Faraday reactions of impurity ions on the electrode surface and prevent charge transfer, thereby suppressing the capacitor's self-discharge behavior. Simultaneously, the electrode, electrolyte, and encapsulation material can all degrade in simulated body fluids, potentially opening up applications in implantable medical electronic devices.

The application discloses a kind of high wear-resistant nitrile rubber sealing material and preparation method thereof, the nitrile rubber sealing material is according to mass parts, including following components: nitrile rubber matrix 100 parts, zinc oxide 2~10 parts, stearic acid 0.5~5 parts, sulfur masterbatch 0.5~5 parts, accelerator 0.5~5 parts, antioxidant 2~10 parts, plasticizer 1~10 parts, carbon black 10~30 parts, molybdenum disulfide or silane coupling agent modified molybdenum disulfide 5~30 parts.The sealing material of the application keeps good mechanical property and wear resistance at the same time, has excellent heat conduction performance, can timely remove heat generated in sealing process or external conduction, reduce the thermal aging rate of sealing material, prolong the service life of material.

This invention discloses an environmentally friendly solvent-free epoxy coating and its preparation method, belonging to the field of epoxy coating technology. The environmentally friendly solvent-free epoxy coating of this invention includes component A and component B, wherein, by mass fraction, component A includes 60-70 wt% epoxy resin, 10-20 wt% reactive diluent, 5.7-6.3 wt% non-reactive diluent, 0.4-0.8 wt% wetting and dispersing agent, 8-10 wt% pigment, 0.3-0.5 wt% defoamer, and 3-5 wt% thixotropic agent. Component B comprises 67-79 wt% modified amine curing agent, 2-4 wt% curing accelerator, 16-24 wt% modified wear-resistant filler, and 3-5 wt% modified curcumin; wherein, the modified wear-resistant filler is obtained by modifying wear-resistant filler with p-aminophenyltrimethoxysilane; the wear-resistant filler is obtained by composite of silicon carbide and molybdenum disulfide; the modified curcumin is obtained by reacting curcumin or curcumin derivatives with epichlorohydrin; the environmentally friendly solvent-free epoxy coating prepared by this invention has good weather resistance and wear resistance.

The invention relates to a method for manufacturing a component (1) comprising a metallic base body (2) with at least one coating (3) arranged at least partially on it, comprising the following steps: - Providing a metal strip (2a), - Providing at least one coating bath (5, 5') and at least partially passing the sheet metal strip (2a) through the at least one coating bath (5, 5'), wherein the sheet metal strip (2a) is electroplated, - wherein the coating (3) is formed by optionally forming a first layer (3a) of nickel on the sheet strip (2a), and by forming at least one second layer (3b) of a tin-nickel alloy in which particles (4) in the form of graphite and / or molybdenum disulfide and / or tungsten disulfide and / or polytetrafluoroethylene are incorporated, directly on the sheet strip (2a) and / or on the optional first layer (3a), and - Forming a coated area of ​​the sheet metal strip (2a) by means of a deep drawing process, whereby the component (1) is simultaneously or subsequently cut out of the sheet metal strip (2a).

The application relates to the technical field of ball valve production and processing, and discloses a production and processing technology of a sealed wear-resistant ball valve, which comprises the following steps: base material pretreatment, wear-resistant bottom layer preparation, functional coating slurry preparation, functional coating coating, sealing surface strengthening treatment, intelligent pressure detection module integration, closed-loop control system assembly, hot isostatic pressing densification treatment, precision calibration and performance testing, surface passivation and packaging. In the application, the nano diamond particles and the chromium-based tungsten carbide composite powder in the functional coating slurry jointly construct a high-hardness wear-resistant framework, resist the abrasive wear and erosion of the sealing surface, the molybdenum disulfide serves as a solid lubricant and forms a transfer film on the friction interface during the working process, reduces the friction coefficient, realizes the self-lubricating effect, the epoxy-modified organic silicon resin serves as a bonding phase, firmly combines the functional components, and endows the coating with good toughness and bonding strength, so that the wear-resistant life and reliability of the ball valve sealing pair are synergistically improved under harsh working conditions.

The application relates to a controllable preparation method of high-length-width-ratio molybdenum disulfide nanobelt or microbelt, and belongs to the field of low-dimensional material preparation. A molybdate solution is used as a molybdenum source, a sodium hydroxide solution is used as a catalyst, and sulfur powder is used as a sulfur source, and the molybdenum disulfide nanobelt or microbelt is obtained through a chemical vapor deposition method; by adjusting the different proportions of the mixed solution of sodium molybdate and sodium hydroxide, the size and orientation of the nanobelt / microbelt can be controlled and adjusted; by adjusting the growth time, the layer number of the nanobelt / microbelt can be adjusted; finally, the molybdenum disulfide nanobelt / microbelt with a length-width ratio greater than 100, different sizes, orientations and layer numbers can be controllably obtained on a substrate. The preparation process is simple, the production cost is low, the size, orientation and layer number are controllable, and the method is suitable for batch production.

The application discloses a kind of based on two-dimensional germanium selenide / molybdenum disulfide polarized photoelectric detector and preparation method thereof, belong to the technical field of germanium selenide crystal material.The application discloses a kind of based on two-dimensional germanium selenide / molybdenum disulfide polarized photoelectric detector, adopt two-dimensional germanium selenide as anisotropic two-dimensional semiconductor layer, adopt molybdenum disulfide as two-dimensional semiconductor layer, molybdenum disulfide is main conductive channel, germanium selenide is as top layer photosensitive material, the built-in electric field of the PN junction formed in vertical direction, the separation of photo-generated carrier is enhanced, so as to improve photoelectric detection performance.Using the method of gas phase transmission, germanium selenide crystal is synthesized using germanium powder, selenium powder and crystalline iodine powder as anisotropic two-dimensional semiconductor layer two-dimensional germanium selenide, with the advantages of simple operation steps, low production cost, can be used for industrial production.

The application aims to provide an organic cation-mediated iron-doped molybdenum disulfide nanosheet self-assembly method and application thereof, and belongs to the technical field of analysis and detection. The method uses polydiallyldimethylammonium chloride as intercalation ions, polyvinylpyrrolidone as stabilizer, and both of them cooperatively control the self-assembly of iron-doped molybdenum disulfide nanosheet. First, the iron-doped molybdenum disulfide nanosheet is prepared by using a hydrothermal synthesis method; then, the PDDA is used as intercalation agent, the PVP is used as stabilizer, and the homogeneous dispersed Fe-MoS2 nanosheet is obtained. Finally, the three-phase liquid-liquid self-assembly method is combined to realize the large-area and single-layer self-assembly of the Fe-MoS2 nanosheet. The method provides a new way for the macroscopic controllable assembly of two-dimensional materials, and combined with the noble metal SERS substrate, the rapid identification and detection of drug molecules can be realized.

The application relates to a method for degrading organic pollutants by using a cobalt intercalated 1T-MoS2 cathode and micro-nano bubbles, and relates to a method for degrading organic pollutants by using a 1T-MoS2 cathode and bubbles. The application aims to solve the technical problems of poor conductivity of a cathode molybdenum disulfide layered transition metal sulfide in current AOPs, limited active sites at edges, poor ORR selectivity and insufficient H2O2 activation capacity. The application first synthesizes cobalt intercalated 1T-MoS2 by using a one-step plasma treatment technology, and the cobalt atoms are uniformly distributed in the MoS2 layers in the form of intercalation. The application also introduces a micro-nano bubble technology, which greatly improves the dissolved oxygen concentration and mass transfer efficiency in water. Through the synergistic effect of the three-in-one combination of "material innovation-mass transfer enhancement-in-situ activation", the application realizes efficient, rapid and deep degradation of organic pollutants under mild electrochemical conditions.

The application provides a dual-mode immune probe based on a titanium carbide SERS substrate and rare earth doped sodium yttrium fluoride nanoparticles and a preparation method and application thereof, and comprises a titanium carbide / molybdenum disulfide composite immune substrate and a NaYF4:Yb,Er immune probe, wherein 78% Y, 20% Yb and 2% Er are contained in the NaYF4:Yb,Er, and the preparation method comprises the following steps: (S10) preparing titanium carbide powder by using an acid etching method; (S20) preparing a titanium carbide / molybdenum disulfide composite immune substrate; and (S30) preparing a NaYF4:Yb,Er immune probe, and the application is suitable for application in detection of prostate cancer, and the detection has high efficiency, high accuracy and high sensitivity, and is suitable for clinical popularization and application.

This invention discloses a three-armed cadmium sulfide nanorod photocatalyst, comprising: three-armed cadmium sulfide nanorods, molybdenum disulfide, and iridium disulfide; wherein each of the three tips of the three-armed cadmium sulfide nanorods is loaded with molybdenum disulfide and iridium disulfide. This photocatalyst is obtained by mixing the three-armed cadmium sulfide nanorods with iridium chloride and sodium molybdate in a solvent, followed by a hydrothermal reaction. This invention achieves efficient separation of photogenerated electron-hole pairs and improves photocatalytic performance by successfully loading molybdenum disulfide and iridium disulfide nanoflower-like co-catalysts onto the tips of the three-armed cadmium sulfide nanorods.

The application relates to the technical field of wastewater denitrification, and discloses a composite carrier as well as a preparation method and application thereof. The composite carrier comprises porous molybdenum disulfide, the porous structure of the molybdenum disulfide in-situ grows zirconium metal organic frameworks, and the surface of the molybdenum disulfide is loaded with graphene. The composite carrier can not only serve as a place for denitrification of microorganisms, but also can improve the denitrification efficiency of the microorganisms.

This application relates to the field of two-dimensional semiconductor material preparation technology, specifically to a method for preparing monolayer molybdenum disulfide by dual-sulfur source chemical vapor deposition, comprising the following steps: Step 1, providing a chemical vapor deposition reaction chamber having an upstream region, a growth region, and a downstream region; Step 2, arranging a molybdenum-containing precursor in the growth region, and arranging a substrate above or opposite to the molybdenum-containing precursor; Step 3, arranging a first sulfur-containing precursor in the upstream region and a second sulfur-containing precursor in the downstream region; Step 4, introducing a carrier gas into the reaction chamber and heating it to cause the first sulfur-containing precursor, the second sulfur-containing precursor, and the molybdenum-containing precursor to volatilize and undergo a chemical vapor deposition reaction on the substrate surface to form a monolayer molybdenum disulfide. This invention employs a dual-sulfur source strategy, achieving large-size, uniform, and low-defect preparation of monolayer MoS2, facilitating widespread application.

The embodiments of this disclosure disclose a wear-resistant rotor blade adjustment device and relate to the technical field of intake fans. [Solution] The wear-resistant rotor blade adjustment device includes an oil pump, an adjustment unit, and a blade shaft. The oil pump is connected to the adjustment unit and is used to supply high-pressure oil to the adjustment unit. The adjustment unit is connected to the blade shaft and is used to drive the rotation of the blade shaft with high-pressure oil to adjust the blade angle. The adjustment unit includes a shoe, and surface grease is applied to the surface of the shoe. The surface grease is molybdenum disulfide. By applying molybdenum disulfide grease to the surface of the shoe, wear and friction coefficient are reduced, wear resistance and abrasion reduction performance are improved, the thermal stability and sealing performance of the grease are improved, thereby achieving higher wear resistance and lubrication effect when adjusting the blade angle.