27results about How to "Improve brittleness" patented technology

This invention relates to the field of polymer material synthesis technology, specifically to a modified PVB resin and its preparation method. The invention introduces a fluorinated acetal monoaldehyde derivative containing fluorine into the PVB resin. This derivative is mixed with n-butyraldehyde and glyoxal, thereby undergoing an acetalization reaction with the 1,3-o-diol structure of the PVB molecular chain, incorporating the fluorinated side link into the PVB molecular chain. Utilizing the high electronegativity and high C-F bond energy of fluorine atoms, it shields against the intrusion of external corrosive media, inhibits oxidative yellowing, and improves weather resistance. Furthermore, the invention introduces glyoxal as a crosslinking agent, containing dialdehyde groups, which can react between adjacent polyvinyl alcohol segments, causing slight crosslinking between the originally linear PVB resin segments, improving the resin's shielding performance, further reducing the intrusion of external corrosive media, and enhancing the stability of the PVB resin.

The present application relates to a kind of environment-friendly water-based phenolic resin anticorrosive coating and its preparation process, belong to the field of coating technology.The coating is made of water-based phenolic resin emulsion, hyaluronic acid-lysine composition load nano SiO2-ZnO composite filler, synergistic anticorrosive filler, wetting dispersant, film forming aid, leveling thickener, defoaming agent and deionized water.The superhydrophilic of hyaluronic acid fundamentally solves the dispersion and storage stability problem of phenolic resin in aqueous phase, and the amino group of its lysine side chain can also chemically bond with resin during curing, significantly enhancing the adhesion, flexibility and interfacial bonding strength of coating.At the same time, nano SiO2, ZnO and synergistic anticorrosive filler construct a multiple synergistic anticorrosive network of physical shielding, sacrificial anode and chemical passivation, achieving long-term active protection.The whole system uses water as medium, selects bio-based raw materials and low VOC additives, and the environmental protection is outstanding.

The invention discloses a sulfur-free FR-4 copper-clad plate and a preparation method thereof, and belongs to the technical field of copper-clad plates. The copper-clad plate is prepared from sulfur-free epoxy resin, a sulfur-free curing agent, a sulfur-free flame retardant, organic silicon hybrid macromolecules, tetrafunctional epoxy resin, linear phenolic resin, microencapsulated ammonium polyphosphate, melamine cyanurate, surface grafting modified boehmite nanorods and filler. Through the design of a sulfur-free system, the sulfur content of the product is lower than 50 ppm, and the problems of contact resistance increase, unstable signal transmission and the like caused by sulfide migration of a traditional FR-4 copper-clad plate in a high-temperature and high-humidity environment are thoroughly solved. Meanwhile, the organic silicon hybrid macromolecules and the high-functionality epoxy resin have a synergistic effect, so that the balance of high glass transition temperature and high toughness is realized. The copper-clad plate has excellent dielectric property, flame retardant property and long-term reliability, and meets the development requirements of high reliability and high performance of electronic products.

The object of the present invention is to provide a novel oil composition suitable for use in chocolate products that is substantially free of lauric acid. An oil composition satisfying the following (a) and (b): (a) The weight ratio (P2Po / P2M) of the content of a triglyceride (P2Po) bonded to two palmitic acids (P) and one palmitoleic acid (Po) relative to the content of a triglyceride (P2M) bonded to two palmitic acids (P) and one monounsaturated fatty acid (M) having 16 to 24 carbon atoms is 0.04 or more; (b) The content of a triglyceride (S3) bonded to three saturated fatty acids (S) having 16 to 24 carbon atoms is 1.5 to 13% by weight.

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 utility model provides an electrode plate of a lithium ion battery. The electrode plate comprises a current collector and an active material layer, the active material layer comprises active material particles, porous nanofibers are distributed among the active material particles, the active material layer comprises n sub-layers, n is greater than or equal to 2 and less than or equal to 10, and the diameters of the porous nanofibers in the n sub-layers are sequentially reduced and / or the mass contents of the porous nanofibers in the n sub-layers are sequentially reduced from the surface layer of the pole piece to the current collector; and the thickness of the active material layer is 40-100 [mu] m. The electrode plate provided by the utility model has more excellent liquid absorption and liquid retention performance, increases electrolyte rapid diffusion channels, can greatly improve wettability of a thick electrode, improves ionic conductance of the electrode plate, reduces concentration polarization in the thickness direction of the electrode plate, and solves the problems of SOC difference in the thickness direction of the electrode plate and low capacitance, rate difference and circulation difference of the thick electrode.

The invention relates to the technical field of target materials, in particular to a high-stability tungsten oxide target material for intelligent dimming glass and a preparation method of the high-stability tungsten oxide target material for the intelligent dimming glass. The modified element is at least one of Nb, Ta and Sn; the doping amount of the modified element is 0.5%-5% of the mass of the tungsten oxide matrix. The doping elements (such as Nb < 5 + > and Sn < 4 + >) are similar to W < 6 + > in radius, a stable solid solution is formed, lattice distortion in the ion circulation process is inhibited, microcracks are reduced, and conductivity is enhanced.

This invention provides a method for preparing a tungsten-titanium-aluminum alloy target. The method includes the following steps: ball milling tungsten powder, titanium powder, and aluminum powder under an inert atmosphere to obtain a mixed powder; adding the mixed powder in portions into a hot-pressing mold, performing hot-pressing sintering and post-treatment to obtain the tungsten-titanium-aluminum alloy target. The tungsten-titanium-aluminum alloy target provided by this invention is widely used in the field of high-performance thin film deposition as a diffusion barrier layer to prevent copper atoms from diffusing into the silicon substrate. Furthermore, due to its high thermal stability and low resistivity, it can also be used as a gate or contact electrode.

The invention discloses a lithium battery positive plate stripping and recycling method, and belongs to the technical field of battery recycling. The recycling method comprises the following steps: shearing the waste ternary positive plate to obtain first positive plate fragments; immersing the first positive plate fragments into a solution containing a monomer and an initiator, and enabling the solution to completely permeate into the first positive plate fragments to obtain second positive plate fragments; after in-situ polymerization, carrying out mechanical crushing and sorting to respectively obtain positive electrode black powder and a positive electrode current collector; wherein the waste ternary positive plate comprises a positive current collector and a positive material layer arranged on at least one surface of the positive current collector. According to the invention, the separation of the positive electrode active material layer and the positive electrode current collector is realized through the combination of interface in-situ embrittlement and mechanical crushing, and the problem that the recovery of the positive electrode material cannot meet the requirements of high yield, high purity and low damage at the same time is solved.

The invention discloses a pure highland barley powder extrusion puffing process optimization method, and belongs to the technical field of food extrusion processing. According to the method, the technical problems that the high-fiber highland barley powder is easily subjected to insufficient puffing and too hard texture in the extrusion process, and the retention rate of heat-sensitive functional components such as beta-glucan is low are solved. The method comprises the following steps: optimizing process parameters based on a multi-target response surface method, and determining the water content of materials, the temperatures of a first region, a second region, a third region and a fourth region of a machine barrel and the rotating speed of a screw; carrying out low-temperature superfine grinding on the highland barley powder; a compound emulsifier and edible sodium bicarbonate are added during hardening and tempering; during extrusion, the temperature gradient between the third area and the fourth area is controlled to be smaller than or equal to 20 DEG C; the method is mainly used for producing the high-quality pure highland barley puffed food, the puffing rate and the beta-glucan retention rate of the product can be synergistically improved, the hardness of the product is effectively controlled, and the eating quality and the nutritional value are improved.

The application belongs to the technical field of epoxy resin, and particularly relates to a hyperbranched polysiloxane toughening agent, a preparation method thereof and application of the toughening agent in preparation of an epoxy resin matrix of a glass steel pipeline. The hyperbranched polysiloxane toughening agent containing amino groups is prepared by addition reaction of hydroxyl-terminated polyether modified silicone oil and toluene diisocyanate to prepare an intermediate, and then reaction of the intermediate with a chain extender diethanolamine. The toughening agent provided by the application has a hyperbranched three-dimensional structure, has Si-O-Si flexible chain segments in the molecule, and contains amino groups in the molecular chain. The toughening agent has excellent compatibility with the epoxy resin, can effectively improve the brittleness of the crosslinked network of the epoxy resin, and can improve the impact resistance of the resin while having little influence on the tensile strength and heat resistance of the resin. The epoxy resin containing the toughening agent can be used in the manufacture of glass steel pipelines for oil fields, and can effectively improve the toughness of the existing glass steel pipelines.

This invention provides a method for predicting vertical sweet spots in high-silica shale, comprising the following steps: S1, collecting shale core samples and obtaining measured experimental data and well logging data of the shale; wherein the measured experimental data of the shale includes measured TOC, NMR porosity, and relative content of silica minerals; S2, establishing the relationship between measured TOC, NMR porosity, and relative content of silica minerals, and determining the lower limits of relative content of silica minerals, TOC, and NMR porosity in the gas-producing section; S3, establishing a calculation model for the relative content of silica minerals in well logging; S4, determining the sweet spot section of the shale; S5, verifying the accuracy of the sweet spot section of the shale. This invention uses the relative content of silica minerals as the key parameter, which is simple and clear; the relative content of silica minerals is also the most important brittle mineral in shale. The higher the relative content of silica minerals, the better the brittleness of the shale, and the more conducive it is to fracturing. Therefore, the high silica content section is also the engineering sweet spot section. This method takes into account the prediction of both geological and engineering sweet spots.

This invention provides a short-process manufacturing technology for high-performance titanium-aluminum alloys, relating to the technical field of titanium-aluminum alloy material preparation. The manufacturing technology uses hydrogenated dehydrogenated powder, aluminum-vanadium alloy, and aluminum-niobium alloy as raw materials. Through hydrogenated dehydrogenation powder preparation, cold isostatic pressing, vacuum sintering, and subsequent processing, a uniformly composed titanium-aluminum alloy is prepared. Utilizing the intrinsic brittleness of titanium-aluminum after its self-propagating reaction, and combining the high purity and easily breakable characteristics of aluminum-vanadium and aluminum-niobium master alloys, the technology achieves thorough mixing and refinement of multiple elements under solid-state conditions. This avoids the microstructure inhomogeneity caused by diffusion limitation in high-vanadium and high-niobium systems, and overcomes the problems of component segregation, coarse microstructure, and difficulty in removing inclusions associated with traditional casting methods for preparing titanium-aluminum alloys. Through the powder metallurgy short-process manufacturing design, this technology offers significant technical advantages in reducing raw material and manufacturing costs, improving compositional and microstructure uniformity, enhancing comprehensive mechanical properties, and achieving large-scale production.

The invention discloses boron nitride coated high-strength elastic ceramic nanowire aerogel as well as a preparation method and application thereof, and belongs to the technical field of superelastic inorganic material preparation. Comprising the following steps: taking silicon carbide nanowire aerogel or silicon nitride nanowire aerogel as a framework, uniformly coating boron nitride on the surface of the framework by adopting a chemical vapor deposition method, and forming fixed boron nitride nodes between adjacent or contacted silicon carbide or silicon nitride nanowires. The strength of the prepared ceramic nanowire aerogel can reach 787.0 kPa, and the ceramic nanowire aerogel has good recovery capacity under the compression strain of 80% and is expected to be used as materials for high-temperature heat prevention and insulation, high-performance damping, heat sealing and the like in an extreme environment.

The present application relates to the field of preparation of bio-based multi-level pore carbon material and environmental governance, in particular to a kind of bio-based three-dimensional multi-level pore carbon material and its preparation method and application.The preparation method of bio-based three-dimensional multi-level pore carbon material of the present application includes the following steps: biomass raw material and phenol, composite acid catalyst are mixed and reacted 1, to obtain bio-based liquefied material;Bio-based liquefied material is mixed with composite base catalyst and polyformaldehyde, and then reacted 2, to obtain bio-based liquefied resin;Bio-based liquefied resin is mixed with surfactant, foaming agent, metal-based DES and curing agent, and then foamed, to obtain carbonization precursor;The carbonization precursor is subjected to carbonization treatment, and then ultrasonic water washing is carried out, to obtain bio-based three-dimensional multi-level pore carbon material.The bio-based three-dimensional multi-level pore carbon material prepared by the method of the present application has uniform structure, contains micron-nanometer multi-level pore structure, and has high adsorption performance.

The application discloses a kind of high-strength waterproof board and preparation method thereof, it is related to plate technical field.The preparation method of the application includes the following steps: sequentially stack 1 steel plate, 2 base plates, 1 fingerprint-resistant polymer film on 1 fingerprint-resistant polymer film, then heat pressing solidification, after cooling, plate is taken out, and high-strength waterproof board is obtained;Wherein, base plate is prepared from modified kraft paper and modified color paper.The water resistance, fire resistance and bonding strength of the plate are effectively improved by modifying kraft paper with modified phenolic resin, hydrophilic silicon dioxide and other components;The bonding strength, water resistance and fire resistance of the plate are further improved by modifying color paper with melamine, vanillin, flame retardant DOPO, 3,4-dihydroxybenzaldehyde and other components.Therefore, the application has a more extensive application prospect.

This invention relates to a high-strength multiphase hot-rolled wire rod for 2360MPa grade stranded wire and its manufacturing method. The method involves rolling the wire rod into a high-carbon Mo-V system, followed by online molten salt weak quenching and toughening treatment. The wire rod undergoes rapid cooling in the initial molten salt treatment, transitioning from an austenitic state to a mixed phase region of bainite and sorbite, forming a microstructure dominated by bainite and sorbite. A subsequent molten salt treatment increases the molten salt temperature, promoting the decomposition of untransformed residual austenite into sorbite, followed by isothermal tempering. Finally, the wire rod undergoes slow cooling on a roller conveyor, resulting in a hot-rolled wire rod with a microstructure consisting of tempered bainite and tempered sorbite, comprising a multiphase microstructure. This allows for online control of the microstructure and toughness, achieving a tensile strength of 1574~1627MPa and a reduction of area of ​​28%~33%, reducing fluctuations in mechanical properties and balancing material cost and production efficiency. This eliminates the need for offline heat treatment to produce ultra-high-strength stranded wire, reducing the risk of wire breakage.

This application belongs to the field of cable material technology and proposes a method for preparing environmentally friendly, low-smoke, halogen-free polyethylene cable material. High-density polyethylene is melt-grafted with vinyltrimethoxysilane and triethyl borate to form a cross-linked network containing Si-O-B bonds. During combustion, this network pyrolyzes to generate B2O3 and SiO2 nanoparticles. The former melts to form a liquid layer that adsorbs free radicals to inhibit the combustion chain reaction, while the latter forms a eutectic glass phase with B2O3. Combined with ZnO nanoparticles released from the decomposition of a borosilicate-metal chelating agent as a flux, a dense glass-ceramic layer is formed in the carbon layer to isolate oxygen and heat. Simultaneously, ethylene-vinyl acetate copolymer, as a vinyl elastomer, not only improves flexibility through its toughening phase, but its vinyl groups also interact with the Si-O-B bonds of the borosilicate-grafted polyethylene, achieving a comprehensive improvement in flame retardancy, smoke suppression, and mechanical properties.

This invention discloses a method for preparing silver paste for a mobile phone speaker diaphragm, belonging to the field of mobile phone acoustic component preparation technology. First, a compound binder is placed in a constant-temperature stirrer, and a toughening agent is added. The mixture is stirred for 40-50 minutes at 70-90°C and a stirring speed of 500-510 r / min, resulting in a binder-toughening agent mixture. Next, based on this mixture, a compound solvent is added to adjust the viscosity of the mixture at 25°C to 5000 mPa·s. The viscosity is then measured using an NDJ-1 rotational viscometer at a rotation speed of 60 r / min. The test was conducted under the conditions of / min and shear rate; and after adjustment, the temperature of the mixing system was reduced to 50-60℃, and stirring was continued for 20-30 minutes for curing treatment, and the cured bonding system was output; based on this, the present invention optimizes the entire process of silver paste preparation, adds a special toughening agent to the bonding system, and fully integrates the toughening agent and the binder through constant temperature curing treatment, which effectively improves the brittleness of the silver paste after film formation, and at the same time precisely adjusts the viscosity and thixotropy of the silver paste to adapt to the ultra-thin characteristics of the diaphragm and the application scenarios of high frequency reciprocating vibration.

This invention relates to the field of ginger lily pickle production technology. The invention provides a ginger lily bud pickle made using *Lactobacillus paracasei* and its preparation method. The ginger lily bud pickle is prepared from the following raw materials in parts by weight: 230-270 parts ginger lily buds, 23-27 parts salt, 4-6 parts rock sugar, 5-7 parts small red chilies, 8-12 parts ginger, 0.8-1.2 parts Sichuan peppercorns, and 4-12 parts *Lactobacillus paracasei* bacterial culture. The ginger lily bud pickle prepared by this invention is appetizing and aids digestion, reduces sourness, has good crispness, and enhances texture.

This invention belongs to the field of magnetic functional materials technology, specifically relating to an amorphous nanocrystalline ribbon and its preparation method. The amorphous nanocrystalline ribbon is composed of the following raw materials in the indicated mass percentages: Nb 5.6-6.5 wt%, Si 9.5-10.5 wt%, B 1-2 wt%, Cu 0.5-1 wt%, Co 0.1-0.2 wt%, Zr 0.05-0.1 wt%, rare earth elements 0.4-1.5 wt%, high-entropy oxide 0.5-1.0 wt%, with the balance being Fe. The high-entropy oxide is prepared by adding ferric chloride, cobalt chloride, nickel chloride, manganese chloride, and scandium chloride to diethylene glycol, heating and stirring under sealed conditions, followed by centrifugation, washing, drying, and calcination to obtain the high-entropy oxide. The amorphous nanocrystalline ribbon prepared by this invention exhibits high magnetic permeability, low coercivity, and high stability within the temperature range of -40℃ to +150℃.

The present application relates to a kind of Ni-Cu high chromium vanadium alloy cold roll steel and its preparation method, belong to steel preparation technical field.The cold roll steel is composed of the following chemical components according to mass percentage: C:0.76%~0.86%, Si:1.00%~1.20%, Mn:0.30%~0.40%, Cr:4.50%~5.60%, Mo:1.00%~1.20%, V:0.18%~0.25%, Ni:0.20%~0.35%, Cu:0.15%~0.25%, P≤0.015%, S≤0.010%, the rest is Fe and inevitable impurities.The cold roll steel prepared by optimizing alloy chemical composition and adjusting heat treatment parameters effectively adapts to the demand of modern cold rolling production line, greatly reduces the replacement cost of roll body and downtime loss, and provides reliable material and process guarantee for the quality and efficiency of cold rolling industry.

The invention relates to the technical field of high polymer materials and coatings, in particular to a flame-retardant solid powder coating with a hydrophilic metal matrix and a preparation method of the flame-retardant solid powder coating. The solid powder coating is prepared from the following components in parts by weight: 15 to 40 parts of flame-retardant tackifying composite powder, 100 parts of epoxy resin, 30 to 35 parts of phenolic curing agent, 20 to 40 parts of titanium dioxide, 0.8 to 2.0 parts of flatting agent and 0.3 to 0.8 part of benzoin. The flame-retardant tackifying composite powder is a ternary grafted copolymer which takes branched polyethyleneimine as a framework and is grafted with a polyethylene glycol chain segment and sulfydryl DOPO silane through click chemistry. The powder is compounded with an epoxy resin system, and the formed coating integrates efficient halogen-free flame retardance, strong chemical tackifying and good flexibility and is suitable for the field of metal surface coating with high requirements for safety and reliability.

The application discloses a kind of conformal heat-conducting insulating composite material and its preparation method and application method, it is related to semiconductor packaging and thermal management technical field.The composite material includes: organic polysilazane resin 40-60 parts, toughening agent 4-10 parts, crosslinking agent 0.1-3 parts, low dielectric heat-conducting filler 35-85 parts, heat-conducting filler dispersant 0.3-2 parts, low volume shrinkage modifier 5-10 parts, catalyst 0.1-1 part, polymerization inhibitor 0.01-0.06 parts, solvent 5-90 parts;Wherein low dielectric heat-conducting filler is hexagonal boron nitride nanosheet, spherical silicon powder and the complex of undefined aluminum nitride, low volume shrinkage modifier is cage-type silsesquioxane.The composite material of the application can perfectly fill micron chip gap, volume shrinkage rate is low after solidification, interface thermal resistance is small, has excellent temperature resistance and high insulation, can satisfy the requirement of high-end equipment manufacturing field such as aerospace, high-performance computing to thermal management material.

This invention relates to the field of battery technology, and in particular to a binder, its preparation method, a negative electrode, and a battery. The binder comprises catechol segments, crown ether segments, amino segments, and carboxylic acid segments. This invention provides a self-healing fast-charging negative electrode binder that improves the ion conductivity of the binder through the crown ether / heteroazo crown ether structure in the polymer; the catechol, amino, and carboxylic acid structures in the polymer endow the electrolyte with certain self-healing properties. Through the interaction of multiple groups, the binder can conduct ions quickly and improve electrode brittleness, thereby enhancing the battery's fast-charging capability and cycle life.

This invention relates to the field of epoxy adhesive technology, and discloses an epoxy adhesive for semiconductor chip packaging and its preparation process; including the following steps: Step 1: Epoxy resin and 3-(perfluorohexyl)epoxypropane are added to ethanol and mixed evenly, then 2-imidazolium-1-ethylamine is added, and the mixture is reacted at 50~60℃ for 4~6 hours to obtain modified epoxy resin; Step 2: Modified epoxy resin, modified polyurethane, defoamer, and diluent are vacuumed and stirred at 800~1200 rpm / min for 40~50 minutes, then nano zinc oxide and curing agent are added sequentially, and the stirring speed is reduced to 200~400 rpm / min for 1~2 hours to obtain epoxy adhesive.

The invention belongs to the technical field of grinding of grinding tools, and discloses a brittle corrosion-resistant metallic bond, a metallic bond superhard grinding wheel and a preparation method of the metallic bond superhard grinding wheel. The brittle corrosion-resistant metal bonding agent prepared by the invention comprises the following raw materials in parts by weight: 50-70 parts of copper powder, 5-20 parts of tin powder, 5-15 parts of graphite powder and 15-20 parts of an improvement additive. Graphite powder and an improvement additive are added into a traditional bronze-based metal binding agent, secondary heat treatment is carried out, the plasticity of the binding agent is reduced, the brittleness and hardness of the binding agent are improved, brittle fracture can occur in time, and the workpiece quality cannot be affected; through secondary heat treatment, elements in the improvement additive form a uniform and compact protective film on the grinding wheel, internal metal can be continuously prevented from being corroded in the whole life cycle of the grinding wheel, and the thickness consistency problem caused by corrosion of the side face in the using process of the grinding wheel is solved. The brittleness and corrosion resistance of the bronze-based metal bonding agent are improved on the premise that the cost is not obviously increased.