27results about How to "Promote wetting" patented technology

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 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.

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.

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.

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.

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.

This invention discloses a urea-coated titanium dioxide nanowire powder, its preparation method, and its application in rigid-flexible matrix digitally controllable smart materials. The preparation method of the urea-coated titanium dioxide nanowire powder includes the following steps: adding anatase titanium dioxide nanowire powder to a saturated urea solution and sonicating, followed by heat treatment, standing, and drying to obtain the urea-coated titanium dioxide nanowire powder. Compared with existing technologies, this method improves the wetting and dispersion of urea-coated titanium dioxide nanowire powder in silicone oil, reduces its agglomeration in an electric field, and increases interfacial resistance to suppress injection and micro-discharge, thereby achieving reduced leakage current, increased breakdown field strength, faster response, and less hysteresis, while maintaining more stable electrorheological properties under humid and cyclic conditions.

The present disclosure relates to a kind of active solder paste composition for ceramic copper clad, ceramic copper clad method and copper clad ceramic, with the total weight of active solder paste composition as basis, active solder paste composition contains 1-20wt% first metal powder, 75-94wt% second metal powder and the balance of flux;Wherein, first metal powder contains titanium hydride, and second metal powder contains copper phosphorus silver alloy.The active solder paste composition provided by the present disclosure not only can reduce the silver content, but also can reduce the welding temperature, while also increasing the connection strength of Ti and Cu, increase the welding strength, so that material is not easy to occur segregation.

The application provides a brazing process of an aluminum alloy material for brazing. The material of a runner plate used in the brazing process is an aluminum rare earth material, which comprises, in percentage by mass, 7.0-9.0% of a rare earth metal element RE, 0.4-0.6% of an Fe element, 0.6-1.2% of an Mn element, 0.3-0.5% of a Cr element, 0.02-0.15% of an Mg element, 0.1-0.2% of a Ti element, 0.02-0.2% of a V element, 0.02-0.1% of a B element, ≤0.1% of an Si element, ≤0.01% of a Cu element, the balance of an Al element and inevitable impurities, and ≤0.05% of a single impurity element. After brazing by the brazing process, the weld is full and has high strength, and the brazing process is suitable for brazing of runner plates with various complex structures.

The invention discloses a tail gas absorption device and method for asphalt processing, and belongs to the technical field of tail gas treatment.The method comprises the steps that real-time working condition parameters of asphalt tail gas are obtained; obtaining target dynamic surface tension and target charge density based on the working condition parameters; based on the target value, the surfactant addition amount and the electrostatic ring working voltage are obtained; preparing spraying liquid, applying voltage, and measuring actual dynamic surface tension and actual charge density in real time; spraying the spraying liquid into an absorption tower for absorption, and obtaining theoretical absorption efficiency based on actual parameters; and comparing the theoretical absorption efficiency with the target absorption efficiency, if the theoretical absorption efficiency is smaller than the target value, adjusting the addition amount and / or the voltage and returning to the previous step, otherwise, maintaining the current parameter operation. Through cooperative regulation and control of dynamic surface tension and charge density and introduction of a closed-loop feedback mechanism, efficient and stable absorption of asphalt tail gas is achieved, and the problems that in the prior art, absorption efficiency fluctuation is large, and it is difficult to adapt to working condition changes are solved.

The application relates to the technical field of nano color paste, and discloses a water-oil universal type nano color paste and a preparation method thereof, which is composed of 30-40 parts of water-oil modified polyurethane, 3-5 parts of polyethylene glycol monomethyl ether, 2-6 parts of polyether modified maleic anhydride copolymer, 6-10 parts of polydimethylsiloxanol, 5-8 parts of glycerol, 0.3-0.6 parts of isobutyl alcohol amine, 35-50 parts of deionized water, 20-30 parts of pigment color powder and 10-20 parts of ethanol in terms of weight fraction. The water-oil modified polyurethane has certain hydrophobic performance (provided by an alkyl long chain) and certain hydrophilic performance (provided by sodium sulfonate), the balance of the two performances makes the water-oil modified polyurethane play a stabilizing role in a water-oil mixture, and the water-oil modified polyurethane has good storage stability. The water-oil modified polyurethane has easy preparation, wide application range, is suitable for most oil-based paints and water-based paints on the market, has extremely high transparency, permeability, and excellent effects on coloring and wetting of wood.

The invention relates to a tungsten-copper composite material forming part and a preparation method thereof, and belongs to the technical field of metal composite materials. The raw materials of the forming part are composed of a tungsten source, a copper source and a forming agent. The tungsten source consists of modified tungsten powder and tungsten powder; the modified tungsten powder is obtained by adding a reinforcing phase and an activating element, wetting and adhesion of a tungsten phase and a copper phase can be promoted, the sintering performance of the formed part is improved, and the comprehensive performance of the formed part is improved; the forming agent is added to ensure that the powder has good flowability and formability, the problems that a large-size tungsten-copper blank is poor in compression molding formability and high in manufacturing cost are solved, and a tungsten-copper composite material formed part which is uniform in structural component, low in cost and easy to form is obtained. The preparation method comprises the following steps: dispersing an activating element and a reinforcing phase into tungsten powder through a ball milling method to obtain modified tungsten powder, adding double-granularity composite powder of the modified tungsten powder and unmodified tungsten powder into a forming agent to obtain easily-formed composite powder, and pressing the composite powder into a large-size tungsten copper green body, the method has the characteristics of low cost, good repeatability, controllable process, raw material saving and the like.

The application belongs to the technical field of color paste, and discloses a kind of inkjet ink color paste and preparation method thereof, and the application uses cashew phenol polyoxyethylene ether and acrylic copolymer dispersant containing pigment affinity group as dispersant with mass ratio 1: (0.5~1), the cashew phenol polyoxyethylene ether molecular structure contains phenolic hydroxyl and long chain alkyl, which forms π-π stacking effect with permanent yellow aromatic ring, can quickly wet, penetrate, spread on the surface of pigment;Acrylic copolymer dispersant containing pigment affinity group can make pigment deflocculate by steric hindrance stabilization, which can form multi-point strong hydrophobic adsorption and electrostatic adsorption with the surface of coated modified permanent yellow particles, adsorption is firm and not easy to desorb, can long-term inhibit particle aggregation, the combination of the two significantly improves room temperature stability, thermal stability, centrifugal stability, effectively reduces color difference.

The invention belongs to the technical field of conductive paste for automobile glass, and relates to acid-resistant antioxidant silver paste for automobile glass and a preparation method of the acid-resistant antioxidant silver paste. The silver paste comprises the following raw materials: 50-70 parts of metal silver powder, 5-15 parts of lead-free glass powder, 0.5-5 parts of rare earth salt, 2-10 parts of polymer resin, 1-3 parts of an organic additive and 10-30 parts of an organic solvent. The preparation method comprises the following steps: modifying rare earth salt by a silane coupling agent to obtain modified rare earth salt; dissolving polymer resin in an organic solvent to obtain a carrier; and adding the metal silver powder, the lead-free glass powder, the organic additive and the modified rare earth salt into the carrier, and sequentially performing stirring, grinding and vacuum defoaming treatment to obtain the acid-resistant antioxidant silver paste. The automobile rear windshield demisting heating wire is suitable for automobile rear windshield demisting heating wires, and the high-reliability welding requirement can be met.

The application provides a moisture-regulating and sweat-guiding composite fabric and a preparation method thereof. The moisture-regulating and sweat-guiding composite fabric comprises, in sequence, an outer fabric layer, a waterproof and breathable layer and a moisture-regulating and sweat-guiding layer, and the layers are bonded through hot melt adhesive. The moisture-regulating and sweat-guiding layer is obtained by blending moisture-guiding fibers and moisture-storing and buffering polyester fibers. The moisture-guiding fibers are obtained by melt spinning after blending of first polyester chips and sodium-based montmorillonite. The moisture-storing and buffering polyester fibers are obtained by melt spinning after blending of second polyester chips and divalent metal ion-exchanged zeolite. The application can make the skin-friendly side of the composite fabric have liquid sweat absorption and accommodation capacity, moisture-guiding and diffusion capacity and drying performance.

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 polyethylene oxide-based second polymer having a weight average molecular weight of 200 g / mol to 2,000 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.