48results about How to "Promote wetting" patented technology

The invention discloses a water-based lithium battery positive electrode adhesive, a preparation method and application. The adhesive is of a single-layer or multi-layer shell core-shell structure formed by polar monomers such as acrylic acid, acrylate monomers, cross-linking monomers, self-emulsifying monomers and water through core-shell emulsion polymerization; by controlling the mass percent of acrylate monomers, polar groups and the like in the core layer structure and the shell layer structure and selecting proper types and dosages of cross-linking monomers and self-emulsifying monomers, the adhesive has proper surface tension, shows excellent adhesion and wettability to the current collector, has high peel strength, and is suitable for the current collector. According to the present invention, the lithium ion battery pole piece has the low glass-transition temperature so as to ensure the high toughness, the high surface density, the excellent electrolyte resistance, the excellent electrical property, the excellent coating property and the like of the pole piece, and the raw materials are all non-fluorine materials so as not to produce hydrogen fluoride and other harmful gases during the lithium battery recovery; water is used as a solvent, recycling is not needed, environment friendliness and low carbon are achieved, the manufacturing process is simplified, and the application range is widened.

The invention belongs to the field of electrical electronics and advanced non-ferrous metal additive manufacturing, and particularly relates to a preparation method of a laser additive manufacturing copper alloy-tungsten copper composite electrical contact, which comprises the following steps of: preparing a nickel or nickel alloy coating on a copper alloy base material by adopting coaxial powder feeding laser cladding to serve as a middle layer, and then preparing a tungsten copper coating by laser cladding to obtain the copper alloy-tungsten copper composite electrical contact. The composite electrical contact is composed of a pure copper or copper alloy base material layer, a pure nickel or nickel alloy coating and a tungsten copper coating in sequence. The electrical contact obtained by the invention has relatively high electrical conductivity and thermal conductivity, and also has good arc ablation resistance; the copper alloy-tungsten copper electrical contact is prepared by adopting the laser cladding technology, so that the production cost can be effectively reduced, the production efficiency is improved, meanwhile, later maintenance and repair are facilitated, and the method is green and environment-friendly.

The invention provides a modified silicone oil agent with a comb-shaped structure as well as a preparation method and application thereof, the oil agent comprises an amino modified silicone oil emulsion and an epoxy modified silicone oil emulsion, and the mass ratio of the amino modified silicone oil emulsion to the epoxy modified silicone oil emulsion is 1: (0.5-1.5); the amino modified silicone oil emulsion and the epoxy group-containing modified silicone oil emulsion have comb-shaped structures, main chains of the amino modified silicone oil and the epoxy group-containing modified silicone oil are acrylate polymers, and branch chains are amino short silane chains or epoxy group-containing short silane chains; the preparation method of the oiling agent comprises the following steps: respectively preparing amino short-chain silicone oil and epoxy group-containing short-chain silicone oil, and then respectively synthesizing amino modified silicone oil emulsion and epoxy group-containing modified silicone oil emulsion. The acrylate polymer is introduced, the content of organic silicon is reduced, the viscosity of the oiling agent is small, carbon fibers are conveniently oiled, a protective film is formed on the fibers, friction and abrasion between the fibers are prevented, and therefore the surface defects of the carbon fibers are reduced.

The invention belongs to the technical field of conductive materials, and particularly discloses graphene conductive paste and a preparation method and application thereof. The graphene conductive paste is prepared from the following raw materials in parts by weight: 1 to 10 parts of graphene, 0.5 to 10 parts of conductive carbon black, 0.5 to 1 part of a dispersing agent, 0.5 to 2 parts of a stabilizer, 80 to 90 parts of a solvent, 0.5 to 1.5 parts of a surfactant, 1 to 5 parts of a modified silane coupling agent and 0.5 to 1 part of an adhesive, the molecular structure of the modified silane coupling agent contains fluorine element and phosphorus element, and also contains phenolic hydroxyl group, and various groups have synergistic interaction, so that the performance of the graphene conductive paste is improved together; the invention also discloses a preparation method and application of the graphene conductive paste. The graphene conductive paste provided by the invention has excellent conductivity, cohesiveness, corrosion resistance, dispersity and thermal stability, and can be widely applied to preparation of lead-acid batteries, sodium-ion batteries and lithium-ion batteries.

The invention relates to the technical field of soldering flux processing, in particular to a high-humidity type halogen-free soldering flux and a preparation method. The high-humidity type halogen-free scaling powder is prepared from, by weight, 20%-30% of a film-forming agent, 4%-8% of an active agent, 5%-10% of palm wax, 0.5%-1% of a corrosion inhibitor, 2%-5% of a thixotropic agent, 0.2%-0.6% of dimethylamine hydrochloride, 1%-2% of chlorinated rare earth salt, 5%-10% of a modifier and the balance solvent, and the modifier is obtained by mixing castor oil, octadecanamide and glycerin. The wettability of the halogen-free soldering flux prepared through the compound formula in the welding process is greatly improved, a molten pool is more stable, and welding defects are reduced. Meanwhile, due to the introduction of the modifier, especially the mixture of castor oil, octadecanamide and glycerol, the thermal stability of the scaling powder is improved, the risk that a traditional active agent is decomposed at high temperature is reduced, release of harmful gas and formation of residues are reduced, and the welding quality is guaranteed.

The invention discloses a method for brazing a graphite / copper dissimilar material by using diamond particle reinforced AgCuInTi composite brazing filler metal, and relates to a method for brazing the graphite / copper dissimilar material. The invention aims to solve the technical problem that a reliable joint cannot be obtained due to great residual stress generated in the joint by using a direct brazing mode because the difference between the thermal expansion coefficients of graphite and copper is great. The AgCuInTi brazing filler metal and the diamond particles are evenly mixed in a ball milling mode to prepare the composite brazing filler metal, and the composite brazing filler metal is used for brazing graphite / copper dissimilar materials under vacuum. According to the method, reliable connection of the graphite / copper dissimilar materials is successfully achieved, the room-temperature shear strength of the connector can reach 30 MPa, the problem that the residual stress in the dissimilar material connector is large is solved, and application of the graphite / copper dissimilar material component in the fields of nuclear power, radiation protection and the like can be achieved.

This invention discloses a method for preparing a Pt / C catalyst by vacuum impregnation with an ionic liquid and its application. First, a carbon support is mixed with water and alcohol, ball-milled, and then mixed with nitric acid to obtain an acid-treated carbon support. Next, a precursor solution is prepared by mixing a platinum salt, an organic solvent, a surfactant, and water, and then an imidazole ionic liquid is added to it in portions to obtain a precursor solution containing the ionic liquid. This solution is mixed with the acid-treated carbon support and vacuum ball-milled to obtain a mixed slurry. This slurry is then vacuum freeze-dried to obtain a freeze-dried powder. Reduction and heat treatment are then performed to obtain the ionic liquid-doped Pt / C catalyst. The catalyst is then coated onto both sides of a proton exchange membrane to form a catalytic layer. Through this method, this invention not only effectively inhibits the aggregation, migration, and ripening of platinum particles during electrochemical processes, thereby significantly improving the catalyst's durability, but also enhances the catalyst's proton conductivity under low humidity conditions.

The present invention relates to the field of surfactant technology, and discloses a long-acting bactericidal surfactant and its application in washing powder. The present invention performs Schiff base condensation reaction on DL-tyrosine and glutaraldehyde, and then performs esterification reaction with alkyl acyl chloride compound, and then reduces with sodium borohydride, and undergoes epoxy ring-opening reaction in 2,3-epoxypropyltrimethylammonium chloride to obtain a novel long-acting bactericidal surfactant. The long-acting bactericidal surfactant contains a diquaternary ammonium salt antibacterial group, and the minimum inhibitory concentration MIC for bacteria such as Escherichia coli is only 0.391ug / mL. When the mass concentration of the long-acting bactericidal surfactant of the present invention is 0.2-2g / L, the surface tension of the solution is only 58.1-12.0mN / m, and the lower the surface tension, the better the wetting, emulsification and dispersibility, which is conducive to the practical application of surfactants in washing powder, laundry detergent, etc.

The invention discloses an aviation spray auxiliary agent for improving the rain wash resistance of plant protection fog drops and application of the aviation spray auxiliary agent. The invention provides a composition for plant protection aviation spraying. The composition comprises sodium dodecyl benzene sulfonate and polyethylene glycol monostearate. The invention also provides a plant protection aviation spray auxiliary agent which comprises the composition. The plant protection aviation spray auxiliary agent provided by the invention can significantly improve the rain wash resistance of fog drops on crop leaves during aviation pesticide application, thereby solving the key problems that the window period of pesticide application in rainy seasons in the south is short, and the pesticide liquid is very easy to wash away by rain water due to frequent heavy rainfall.

The invention discloses a tin-zinc-copper powder ultrafine powder batch preparation process, and relates to the technical field of metal powder preparation, and the tin-zinc-copper powder ultrafine powder batch preparation process comprises the following steps: dissolving tin salt, zinc salt and copper salt in deionized water, adding a complexing agent, and uniformly mixing to obtain a mixed metal salt aqueous solution; dissolving a rosin-based polyamine hyperbranched dispersant in an organic solvent to serve as an oil phase; slowly adding a mixed metal salt aqueous solution into the oil phase, and uniformly dispersing to obtain a water-in-oil microemulsion system; dropwise adding a reducing agent solution, and continuously carrying out heat preservation reaction for 0.5-3 hours after dropwise adding is finished, so as to obtain slurry containing alloy particles; and carrying out demulsification treatment, centrifugal separation, repeated washing and drying to obtain the surface-modified tin-zinc-copper superfine powder. Superfining of particles is achieved through confinement growth, synchronous co-deposition of multi-component elements is guaranteed, a homogeneous alloy phase is formed, component segregation is avoided, and a protective layer formed on the surface of the powder in situ endows the material with excellent oxidation resistance and good weld-aid wettability.

The present application belongs to the technical field of preparation of multi-curved surface silicon carbide, and discloses a preparation method of reaction sintering multi-curved surface silicon carbide whole plate, comprising: mixing 100 parts of alpha-SiC powder, 15-20 parts of composite carbon source, 1-2 parts of silicon carbide fiber, 2.3-3.8 parts of dispersing agent, 8-12 parts of water-soluble phenolic resin, 2-4 parts of additive and 42-46 parts of water according to weight parts, pre-dispersing, ball-milling, spray granulating, pressing into multi-curved surface green body; the green body is stacked with graphite support parts and filled with graded silicon particles, and is subjected to step-by-step degreasing and step-by-step reaction sintering under vacuum argon, and then is cooled after temperature control to obtain the product. Through the synergistic effect of formula control of composite carbon source, specific ternary additive and fine sintering process, the technical problem of sintering cracking and cracking of multi-curved surface whole plate is eliminated, and the product density, bending strength and fracture toughness are effectively improved.

The invention provides an electrolyte and a secondary battery. The electrolyte comprises an organic solvent, a lithium salt, a film-forming additive and a metal corrosion inhibitor, the mass ratio of the metal corrosion inhibitor in the electrolyte is 0.001-2%; the metal corrosion inhibitor is a benzotriazole compound and / or a sulfonate compound; the chemical formula of the sulfonate compound is R-SO3M, R is C1-C16 straight-chain alkyl or phenyl-substituted C1-C12 straight-chain alkyl, and M is selected from any one of Li, Na and K. The invention further discloses a preparation method of the sulfonate compound. By adding the metal corrosion inhibitor according to the type and the mass ratio into the electrolyte, a protective layer can be formed on the surface of the steel shell of the cylindrical battery, so that the contact between acidic byproducts in the battery and the surface of the steel shell is isolated, the corrosion of the steel shell is inhibited, and the storage performance, the cycle life and the safety of the battery are further improved.

The application discloses a pesticide synergist and a preparation method thereof. The pesticide synergist comprises a silanol-initiated polyether shown in formula I, an inositol phosphate-initiated polyether shown in formula II, an alcohol auxiliary agent and water. The silanol-initiated polyether shown in formula I and the inositol phosphate-initiated polyether shown in formula II are synergized, so that the adhesion, spreading, penetration and retention capacity of pesticide droplets on a target surface are significantly enhanced, and the utilization rate of the pesticide is effectively improved. The product has the advantages of low toxicity, environmental friendliness, multi-functional synergism, wide compatibility and the like, the preparation process is simple and stable, and the product is suitable for industrial production.

The application provides a UV white ink and a preparation method thereof. The preparation raw materials of the UV white ink include, in parts by weight, 3-15 parts of silicone-modified acrylate prepolymer, 30-90 parts of monofunctional monomer, 1-10 parts of bifunctional monomer, 3-10 parts of photoinitiator, 1-15 parts of titanium white, 0.1-5 parts of dispersant and 0.1-5 parts of auxiliary agent. The silicone-modified acrylate prepolymer is used to improve the flexibility, smoothness and water resistance of the ink layer, and the specific functional monomer compound system is used to inhibit the curing shrinkage and enhance the adhesion, so that the UV white ink with excellent comprehensive performance is obtained, and is suitable for the inkjet printing of silica gel labels.

The invention relates to a preparation method and application of a lithium battery negative electrode binder, belongs to the technical field of lithium batteries, and solves the technical problems that an existing lithium battery negative electrode binder is poor in mechanical strength, poor in cycle performance when applied to a lithium battery, unstable in processing and the like. According to the solution, the lithium battery negative electrode binder is prepared from the following components in percentage by mass: 0.5 to 1 percent of sulfonic acid functionalized COFs and 99 to 99.5 percent of polyacrylic acid aqueous solution or 0.5 to 1 percent of carboxylic acid functionalized COFs and 99 to 99.5 percent of polyacrylic acid aqueous solution; the sulfonic acid functionalized COFs or carboxylic acid functionalized COFs are prepared from a first monomer and a second monomer through a Schiff base reaction; the preparation method of the lithium battery negative electrode binder comprises the following steps: 1) preparing sulfonic acid functionalized COFs or carboxylic acid functionalized COFs; 2) weighing polyacrylic acid and water, and uniformly mixing to prepare a polyacrylic acid aqueous solution; and 3) weighing 0.5%-1% of sulfonic acid functionalized COFs or carboxylic acid functionalized COFs prepared in the step 1), adding the weighed sulfonic acid functionalized COFs or carboxylic acid functionalized COFs into 99%-99.5% of a polyacrylic acid aqueous solution, and uniformly dispersing the sulfonic acid functionalized COFs or carboxylic acid functionalized COFs in the polyacrylic acid aqueous solution in an ultrasonic manner. Compared with the prior art, the lithium battery negative electrode binder has the advantages that the lithium battery negative electrode binder is high in mechanical strength, a prepared electrode plate is small in impedance and not prone to breakage during processing, and a prepared lithium battery is high in cycling stability and cycling efficiency, large in capacity and the like.

The invention discloses a pre-welding surface modification method suitable for aluminum oxide ceramic air reaction brazing, and belongs to the field of brazing, the pre-welding surface modification method comprises a high-temperature hydrogen reduction process and an air reaction brazing process, Al2O3 ceramic is subjected to a reduction reaction by means of the high reduction characteristic of H2 under the high-temperature condition, dispersed particles are formed on the surface of the ceramic, and the surface of the Al2O3 ceramic is subjected to surface modification. The surface roughness of the ceramic is improved, wetting of the oxide brazing filler metal is promoted, the brazing filler metal can permeate into the grain boundary of the surface of the ceramic, a brazing filler metal and ceramic composite phase region is formed on the interface, Al2O3 particles distributed in a dispersed mode are formed in a weld joint, and the strength of the joint is improved while the residual stress of the ceramic joint is relieved. In the brazing process, brazing filler metal permeates into the Al2O3 ceramic surface subjected to high-temperature hydrogen reduction, a ceramic and brazing filler metal composite phase region is formed, the welding residual stress caused by the difference of thermal expansion coefficients between a welding seam and ceramic is relieved, ceramic particles obtained through reduction are dispersed and distributed in the welding seam after welding, and the joint strength is improved in a dispersion strengthening mode.

This invention discloses a method for unsteady-state ultrasonic standing wave-assisted control of fusion welding. It utilizes dual ultrasonic transducers to perform dual-wave interference, forming an ultrasonic standing wave. This ultrasonic standing wave is introduced into the fusion welding process, and its action on the welding area allows for real-time control of the microstructure and properties of different parts of the weld joint. This forms a unsteady-state ultrasonic standing wave with controlled directional movement of the wave packet nodes, which is then used to regulate the microstructure and properties of the weld joint. This invention enables control over the direction and speed of movement of the unsteady-state ultrasonic standing wave wave packet nodes, allowing for regional control of the microstructure and properties of different parts of the weld joint, resulting in a more uniform joint composition and microstructure. It can solve problems such as undercut, burn-through, high residual stress, severe deformation, and columnar crystals that reduce joint performance during the welding of thin materials or fine wires, refining grains and improving joint performance. It can achieve controllable connections from the centimeter scale to the micrometer scale.

The present invention relates to a composition for an electrolyte of a lithium secondary battery, a gel polymer electrolyte including a polymerization product thereof, and a lithium secondary battery including the gel polymer electrolyte, the composition including a lithium salt, a polyalkylene carbonate-based first polymer having a weight average molecular weight of 1,000 g / mol to 1,500,000 g / mol, a polypropylene carbonate-based second polymer including a unit represented by Formula 2 and having a weight average molecular weight of 200 g / mol to 1,000 g / mol, and an organic solvent, wherein the weight average molecular weight of the second polymer is in a range of 1 / 3,000 to 1 / 3 of the weight average molecular weight of the first polymer, and the amount of the first polymer is in a range of 0.1 wt% to 30 wt% based on the total weight of the composition.

A syringe for laboratory use and its method of use include a syringe body, a piston disposed within the syringe body, a push-pull rod disposed at one end of the piston, a front plate disposed at one end of the syringe body, and a rear plate disposed at the other end of the syringe body. A perforation is formed in the rear plate, through which one end of the push-pull rod passes. A short outlet tube and a feed inlet are disposed in the front plate. The short outlet tube is located on the vertical center line of the front plate, with its inner edge close to the inner edge of the syringe body. A plug is disposed in the feed inlet. A cleaning port is formed in the rear plate. The syringe is placed horizontally with the short outlet tube positioned above the front plate to expel excess air from the liquid within the syringe body, leaving a small amount of air inside. The syringe is then rotated 180° axially so that the short outlet tube is positioned below the front plate. The syringe is connected to an injection pump. The length of the liquid column within the syringe body is read from a length scale. This value and the injection time are input into the injection pump, and the injection begins.

The invention relates to the technical field of new energy, in particular to a composite current collector assembly and a preparation method thereof, a pole piece assembly and a preparation method thereof and a battery. The composite current collector assembly comprises an insulating layer, a conductive layer and a weld-aid coating, the conductive layer is located on at least one side of the insulating layer, the conductive layer comprises an electrode active area and a tab blank area connected with the electrode active area, and the weld-aid coating is located on the conductive layer corresponding to the tab blank area. The raw materials of the weld-aid coating comprise modified rosin, organic acid, organic amine, a wetting agent, a surface active agent and a corrosion inhibitor. By selecting the raw materials of the weld-aid coating, the traditional transfer welding procedure can be omitted, the problem that the welding process is tedious is solved, and the welding quality is good.

The invention relates to the technical field of packaged diodes, and in particular to a diode preparation process based on wafer-level packaging. The preparation process comprises: based on forming an initial bump on a target wafer, performing a formation quality inspection, determining whether to start a reflow soldering mode according to a deposition inspection result, and based on starting the reflow soldering mode, determining actual reflow parameters according to a deposition inspection result; heating the target wafer according to the actual reflow parameters to form a target bump; during the reflow heating process, real-time monitoring is performed on the target wafer, and time nodes of each stage of the reflow heating process are determined according to a reflow monitoring parameter set; based on the end of the reflow heating process, the target wafer is packaged and cut, and during the cutting process, electrical tests are performed on each diode wafer grain obtained, and diode wafer grains that fail the electrical test are marked to obtain electrical marking results, and actual abnormal causes are determined according to the electrical marking results.

This invention provides an inverted perovskite solar cell, its fabrication method, a perovskite film composition, a crystallizing solvate, an electrical device, and its applications. The method includes: seeding crystals on a substrate with a crystallizing solvate before applying a perovskite precursor solution; the general formula of the crystallizing solvate is A. x PbX4·yDMSO, where A is a cation selected from the following substances: ethylenediamine, butanediamine, heptamethamine, phenylethylamine, piperazine, N,N'-dimethylethylenediamine, N-methylethylenediamine, N,N,N',N'-tetramethylethylenediamine, N,N,N'-trimethylethylenediamine, N,N-dimethylethylenediamine; X is selected from I ‑ ,Br ‑ Cl ‑ x is 1-2; y is 1-3. The PCE of the PSC of this invention reaches 26.13%, FF reaches 86.75%, and after 1000 hours of maximum power point tracking, it maintains 93% of the initial PCE and after 900 hours of isothermal heating at 85°C, it maintains 85% of the initial PCE.

The application belongs to the field of high polymer materials, and provides a water-permeable and air-permeable sponge and a preparation method thereof. The application adopts a synergistic design of a crosslinked polydimethylsiloxane continuous phase and a directional through-hole network, forms a through-hole network with an open hole rate of 85-92% and an orientation index not less than 0.60 through directional soluble particle template dissolution, and introduces cellulose nanocrystals with a mass fraction of 0.50-2.00% modified by silane coupling to enhance the network, and covalently fixes 0.10-1.00 wt% of hydrophilic functional silane to realize surface hydrophilic modification, realizes air permeability not less than 400 L·m⁻²·s⁻¹, a pore size gradient of 150-250 μm on the near-skin side to 400-600 μm on the far-skin side, and double-medium high-flux water-permeable and air-permeable performance, solves the coupling contradiction problem between high open hole rate and mechanical bearing rebound attenuation, directional through-hole network cycle stability, and double-medium high-flux and low VOC, and has wide application value in the fields of nursing and sports underwear, masks, briefs, eye masks, shoes and mattresses.

The invention relates to the technical field of ink preparation, in particular to a high-blackness ink formula for LED display packaging and an organic silicon modified resin gradient dispersion process. The high-blackness ink formula is prepared from, by mass, 8-20 parts of high-blackness composite pigment, 30-50 parts of organic silicon modified resin, 2-8 parts of polymeric dispersant, 1-5 parts of functional additive and 15-35 parts of high-purity solvent. The organic silicon modified resin provides excellent high and low temperature resistance and yellowing resistance, the unique molecular structure of the organic silicon modified resin is more beneficial to wetting and coating of pigment particles, the three-stage gradient dispersion process is matched with online monitoring, and through stepped increase of the rotating speed and the temperature and ultrasonic assistance, the high-temperature-resistant and anti-yellowing performance of the pigment is improved. Progressive dispersion of the pigment from preliminary wetting to deep coating is realized, and nanoscale uniform distribution and long-term stability of the pigment in resin are ensured. The finally prepared ink has the comprehensive advantages of high blackness, low light transmittance, strong adhesive force, wide process window and the like, and perfectly meets the packaging requirements of high-end LED display.

This invention provides a chitosan-based edible film with a nano-network structure, its preparation method, and its application. The preparation method includes the following steps: 1) Adding zein to water, adjusting the pH, and then adding a phosphorylation reagent to obtain a mixed solution. After dialysis, centrifugation is performed, and the supernatant is freeze-dried to obtain phosphorylated zein nanoparticles; 2) Adding microcrystalline cellulose to FeCl3·6H2O solution, heating in a water bath, vacuum filtering, washing the precipitate until white, and freeze-drying the obtained precipitate to obtain cellulose nanocrystals; 3) Preparing a coating solution: Adding the phosphorylated zein nanoparticles and cellulose nanocrystals to a chitosan hydrochloride solution to obtain a coating solution; 4) Adding a plasticizer to the coating solution, ultrasonically degassing, and then pouring the mixture onto an acrylic plate to naturally form a film, thus obtaining an edible film. The chitosan-based edible film prepared by this invention can be used to reduce cherry cracking when exposed to rain. It is safe and non-toxic and has high market value.

The invention discloses a lithium battery positive electrode adhesive, a preparation method and application, the adhesive is of a multi-layer core-shell structure formed by self-suspension core-shell polymerization of a low-Tg monomer, a high-Tg monomer, a crosslinking monomer, a reactive emulsifying monomer and an initiator, the low-Tg monomer is buried in an inner layer core, the high-Tg monomer is made into a shell part, and the shell is kept as a hard monomer, so that the core-shell structure is formed. According to the present invention, by controlling the proportion of the acrylic ester soft monomer in the core layer structure, the adhesive has the low Tg characteristic, the flexibility and the high surface density of the prepared pole piece are ensured, and by reasonably setting the proportions of the polar group, the polar monomer and the non-polar monomer and the like, the dissolution selectivity of the adhesive is regulated and controlled so as to improve the stability of the prepared adhesive; the adhesive has proper surface tension, shows excellent adhesion and wettability, high peel strength, excellent electrolyte resistance, electrical property, coating property and the like on the current collector, is environment-friendly and low-carbon, and enlarges the application range.

The utility model provides a spraying device for a glass fiber reinforced plastic spraying tower, and relates to the technical field of spraying devices. The spraying device for the glass fiber reinforced plastic spraying tower comprises a first spraying assembly and a second spraying assembly, the first spraying assembly comprises an annular spraying main pipe and spraying branch pipes installed on the annular spraying main pipe, and the spraying main pipe and the spraying branch pipes are each provided with a plurality of spraying heads; the first spraying assembly comprises a plurality of spraying heads, the spraying heads comprise a horizontal spraying head and a vertical spraying head, the second spraying assembly comprises a plurality of layers of annular spraying pieces, the annular spraying pieces are connected through connecting pipes, and the spraying angle of each layer of annular spraying piece is 120-150 degrees. The multi-directional spraying device can realize multi-directional spraying, and the spraying range is expanded, so that the purification treatment effect on tail gas is improved.

This invention provides a method for preparing a CBN grinding wheel, comprising the following steps: melting the raw materials of a ceramic binder, quenching them in water, and then crushing them to obtain a ceramic binder; impregnating the CBN grinding wheel metal matrix in a CBN grinding wheel impregnation slurry, drying and curing it to obtain a CBN grinding wheel blank; sintering the CBN grinding wheel blank and then machining it to obtain the final product; the raw materials of the ceramic binder, by weight percentage, include 10-15% boric acid, 5-6% lithium carbonate, 30-49% silicon dioxide, 28-40% bismuth oxide, 2-3% calcium fluoride, 2-3% nickel oxide, 2-3% cobalt oxide, and 2-3% titanium oxide; the CBN grinding wheel impregnation slurry, by weight percentage, includes 40-45% CBN abrasive, 10-15% the ceramic binder, 33-36% ethanol, 8-10% alcohol-soluble phenolic resin, and 0.5-1% silane coupling agent.

This invention belongs to the technical field of industrial coating engineering and automation control, and relates to a machine vision-based coating thickness control system for steel components. It uses a dielectric parameter detection module to perceive the electromagnetic properties of the liquid coating in real time; a micro-dynamics measurement module, combined with impact force sensing and structured light imaging, analyzes the rheological and dynamic behavior of the coating; and integrates the direct measurement results of the coating's three-dimensional morphology from the machine vision module. With the help of a multi-source data fusion module, the above information and spray gun pose data are synchronously encapsulated into a physical state vector. A collaborative decision control module matches the optimal strategy and generates control commands. Finally, a controlled fluid resonance micro-perturbation field is formed in the jet, thereby achieving in-situ, adaptive control of the coating deposition process. This invention solves the problem that traditional spraying processes lack real-time, quantitative, and adaptive control capabilities for the coating deposition process, ensuring coating thickness uniformity and process stability.

The application provides a perovskite thin film and a preparation process thereof and a perovskite solar cell, and belongs to the technical field of solar cells.The perovskite thin film comprises the following preparation steps: mixing, stirring, heating and ultrasonicating MXene powder, anhydrous dichloromethane and succinyl chloride, filtering and washing, mixing with anhydrous ethanol and performing suction filtration, and heating and drying to obtain a composite mesh; mixing, stirring, ultrasonicating and filtering 1-allyl-3-methyl imidazole iodide, 2-hydroxy-2-methyl-1-phenyl-1-propanone and anhydrous acetonitrile to obtain a buffer; laying the first piece of composite mesh on a substrate, performing hot pressing treatment, dropping the buffer and performing spin coating, irradiating with ultraviolet light, dropping a precursor solution and performing spin coating, laying the second piece of composite mesh, dropping ethyl acetate and performing spin coating, adjusting humidity, and heating and annealing to obtain the perovskite thin film.The perovskite thin film prepared by the application can improve the open-circuit voltage, the fill factor and the photoelectric conversion efficiency of the perovskite solar cell.