766results about How to "Improve high temperature stability" patented technology

The invention belongs to but not limited to the technical field of electrode materials, and particularly relates to a high-tap-density lithium nickel manganese oxide positive electrode material, a preparation method and a lithium ion battery, the chemical general formula of the high-tap-density lithium nickel manganese oxide positive electrode material is LiNi < 0.5-x > Mn < 1.5-y > M < x > N < y > O < 4 >, 0.1, 0 < = y < lt >; 0.1, M and N are doping elements and comprise one or more of Mg, Co, Al, Zr, W, Sb, Ta and Ti; the material is micron-sized spherical secondary particles formed by stacking and aggregating nano-sized octahedral primary particles, and is uniformly dispersed without agglomeration; the spherical secondary particles are formed by mixing spherical secondary particles with large and small particle size distribution, and the average particle size range of the large particles is 3lt; d < 50lt >; the average particle size range of the small particles is 1lt; d < 50lt >; 2 [mu] m.

The invention belongs to the technical field of battery positive electrode preparation, and particularly relates to a mixed coating coated nickel-rich layered oxide positive electrode and application thereof. The mixed coating coated nickel-rich layered oxide positive electrode is an NCM system positive electrode material, and the proportion of a Ni material in an NCM ternary system is greater than or equal to 92 wt%; the ratio content of Ni of the nickel-rich layered oxide positive electrode coated with the mixed coating in three elements of Ni, Co and Mn is greater than or equal to 92 mol%; and the nickel-rich layered oxide positive electrode coated with the mixed coating is coated with Li3PO4 and / or Li3BO3 and / or LiNbO3. The positive electrode material provided by the invention can effectively reduce the space charge layer effect and interface side reaction between the positive electrode and the electrolyte, the lithium ion migration efficiency is high, and the cycle performance of the assembled battery is good.

The invention discloses a porcelainized expansion type fireproof heat-insulating coating and a preparation method thereof, and relates to the technical field of fire prevention, and the fireproof heat-insulating coating comprises an inner coating and an outer coating; the preparation method comprises the following steps: S1, weighing the raw materials of the component A and the component B; s2, preparing the component A; s3, preparing a component B; s4, the surface of the steel structure is coated with the component A, and an inner coating of the fireproof heat-insulating coating is obtained after normal-temperature drying; and continuously coating the surface of the dried inner coating with the component B through a spraying or brushing method, and drying at normal temperature to obtain the ceramifiable expansive fireproof heat-insulating coating. A porcelainized reaction and an intumescent flame-retardant system are combined to protect the steel structure material from two aspects of efficient flame retardance and high-temperature heat insulation, and the effect is excellent; a nitrogen-phosphorus synergistic flame retardant is used for actively inhibiting the flame combustion process, a high-temperature expansion layer formed by expansible graphite and a vitrifiable heat insulation layer formed by ceramic forming filler are used for greatly improving the high-temperature stability and heat insulation efficiency of a carbon layer, and the fire endurance of a steel structure is prolonged.

The invention belongs to the technical field of road engineering materials, and discloses a wide-temperature-range crack pouring adhesive based on rubber modified asphalt and a preparation method thereof.The wide-temperature-range crack pouring adhesive is prepared by taking the rubber modified asphalt as a matrix through a response surface method and adding SBS, basalt fibers and a modifier. The performance of the material is tested through a conventional test, and meanwhile, a test with more characteristics in northeast regions is provided, and the performance of the material is detected through injection depth, viscosity, low-temperature stretching after aging and freeze-thaw cycle stretching. Results show that a test designed by a response surface method has very strong reliability, and the modified heating type crack pouring adhesive added with the basalt fiber can significantly improve the high and low temperature performance of the crack pouring adhesive, and also has good anti-aging performance and freeze-thaw cycle resistance. And the filling depth and the viscosity of the sealant are not obviously lower than those of the same type of sealant.

The invention discloses a low-smoke flame-retardant cable outer layer material, and a preparation method of key components and a high-entropy alloy nano material comprises the following steps: grinding cerous nitrate, ferric nitrate, manganous nitrate, sodium hexahydroxyplatinate and copper nitrate into particles according to a ratio of 2: 1: 1: 1: 1; then adding 10-20 times by mass of a 32% tannic acid solution and 5-8 times by mass of a 10% glutaraldehyde solution, carrying out an oil bath at 65-70 DEG C for a reaction for 4-8 h, then carrying out overnight vacuum freeze drying to obtain mixed powder, placing the mixed powder in a crucible of a muffle furnace, then calcining the mixed powder at 1000-1200 DEG C under the protection of nitrogen flow for 4-10 h, and finally cooling the calcined mixed powder to room temperature. And cooling. The prepared outer layer material for the cable overcomes the defects that a conventional cable easily releases a large amount of toxic smoke during combustion, is poor in flame retardant property and contains halogen to pollute the environment.

The invention discloses a preparation method of a perovskite type high-temperature-resistant CO2 methanation catalyst, which comprises the following steps: firstly, preparing CaZrO3, then dissolving CaZrO3 powder, a nickel source, a soluble organic fuel and a certain amount of ethylene glycol in deionized water according to a molar ratio of 1: (0.2-0.8): (0.1-0.5), stirring to obtain a dispersion liquid, then putting carrier monoclinic ZrO2 powder in the dispersion liquid, and stirring to obtain the perovskite type high-temperature-resistant CO2 methanation catalyst. The preparation method comprises the following steps: uniformly mixing the raw materials, carrying out ultrasonic treatment for 5-12 hours, heating the obtained mixture at 300-550 DEG C until spontaneous combustion, carrying out high-temperature calcination at 800-900 DEG C for 1-2 hours after flame is extinguished, collecting the calcined product, and carrying out ball milling and granulation to obtain the NiO-CaZrO3 / ZrO2 catalyst with a certain mesh number. According to the preparation method of the catalyst, a solution combustion method is introduced in the preparation process, so that active components of the prepared catalyst are fully dispersed, and further high-temperature calcination is performed on the basis, so that the active components are stably anchored on the surface of the ZrO2 carrier, and the catalytic activity and the stability of the catalyst are improved.

The invention discloses a solid waste-based cold-mixed asphalt mixture for preventive maintenance as well as a preparation method and application thereof, and belongs to the technical field of road engineering. The solid waste-based cold-mixed asphalt mixture is prepared from the following components in percentage by mass: 4.7 to 8.6 percent of modified cold-mixed asphalt adhesive, 85.8 to 93.9 percent of aggregate and 1.4 to 5.6 percent of composite filler, the modified cold-mixed asphalt adhesive is prepared from the following components in parts by weight: 86 to 96 parts of emulsified asphalt, 1 to 5 parts of bisphenol A type waterborne epoxy resin emulsion, 0.05 to 1 part of curing agent, 0.01 to 0.05 part of defoaming agent, 1.5 to 8 parts of waterborne polyurethane emulsion and 1 to 3 parts of hydroxypropyl methyl cellulose. The solid-waste-based cold-mixed asphalt mixture prepared by the method shows excellent comprehensive performance in high-temperature rut resistance, water damage resistance, freeze-thaw resistance, skid resistance, volume stability, interlayer shear resistance and the like, promotes reasonable utilization of solid waste resources, and has good economic and environmental benefits.

The organosilicon-polyurethane foam encapsulating material is composed of a component A and a component B. The component A comprises sucrose initial polyether polyol, sorbitol initial polyether polyol, a water-containing alcohol amine foaming agent, a catalyst and a halogen-free flame retardant, and the component B comprises an NCO-terminated polysiloxane-polyurethane prepolymer, silicone oil and a diluent. Wherein the water-containing alcohol amine foaming agent comprises isopropyl alcohol di-sec-butyl alcohol amine, a mixture of isopropyl alcohol sec-butyl alcohol amine and water. The two-component encapsulating material is used for encapsulating a new energy battery module.

The invention relates to the technical field of welding, in particular to a lead-free solder composition and a preparation method thereof. The composition comprises brazing filler metal and a brazing flux, wherein the brazing filler metal comprises 55 to 65 parts of copper, 30 to 40 parts of zinc, 0.5 to 1 part of silver, 0.1 to 1 part of tin, 0.1 to 0.5 part of nickel, 0.02 to 0.15 part of lanthanum, 0.03 to 0.15 part of cerium and 0.05 to 0.2 part of indium; the brazing flux comprises 18-22 parts of borax, 13-17 parts of boric acid, 25-32 parts of a potassium fluoride and potassium fluoborate compound, 3-5 parts of calcium fluoride, 12-16 parts of aluminum oxide and 8-11 parts of magnesium oxide. The lead-free solder composition does not contain toxic lead elements, pollution to the environment and the ecological system is little, the wettability, corrosion resistance, strength, stability and the like of the lead-free solder composition are improved, and the welding quality is comprehensively improved. According to the preparation method, uniform distribution and accurate control of the brazing filler metal and the brazing flux are guaranteed, stability and consistency of product quality are guaranteed, and the preparation method is easy and convenient to operate and suitable for mass production.

The invention relates to the technical field of aluminum alloy material pressure processing, in particular to an aluminum alloy material for preparing a steel-aluminum composite strip and a preparation method thereof.The aluminum alloy material comprises a steel layer and an aluminum alloy layer, and the aluminum alloy layer comprises, by mass, 100 parts of silicon (Si), iron (Fe), copper (Cu), manganese (Mn), magnesium (Mg), zinc (Zn) and the balance aluminum and inevitable impurity elements. According to the method, through the laser interface activation and ultrasonic-assisted rolling technology, the interface bonding degree and the microstructure of the steel-aluminum composite material are remarkably improved, and the stability of the steel-aluminum composite material at the high temperature is optimized. And microalloying elements such as scandium (Sc) are introduced, so that the mechanical property and the corrosion resistance of the material are enhanced. The service life is prolonged through a special high-temperature-resistant coating and an accurate heat treatment process, and the surface hardness and corrosion resistance are improved. The advanced processes ensure high performance and high quality of the composite material, and meet the requirements of high temperature and special environments.

The invention discloses a preparation method of a high-entropy metal oxide for preparing synthesis gas by carbonate pyrolysis carbon dioxide and methane dry reforming. The high-entropy composite metal oxide is obtained by nucleation of a mixed salt solution and an alkali source solution in a nucleation reactor, crystallization, washing, drying, grinding and high-temperature roasting. The high-entropy composite metal oxide prepared by the method is used for ultrahigh-temperature coupling reaction for preparing synthesis gas by taking carbonate pyrolysis industrial tail gas CO2 and CH4 as raw materials, the synthesis gas is efficiently prepared, and meanwhile, full utilization of waste heat in the carbonate pyrolysis process and resource conversion of CO2 are realized; the contribution is made for promoting the development of environment-friendly society and circular economy; the high-entropy composite metal oxide catalyst has excellent activity, selectivity and stability.

The embodiment of the invention provides a composite phase change heat storage material and a preparation method, the composite phase change heat storage material is a microcapsule with a core-shell structure, the core is a metal iron microsphere, and the metal iron microsphere is used for storing heat through phase change in the heat storage and release process of an energy storage system; the shell is a metal oxide with high-temperature stability and a high heat conductivity coefficient, and the shell is used for packaging the metal iron microspheres and serving as a heat-conducting medium in the heat storage and release process of the energy storage system. According to the embodiment of the invention, the composite phase-change heat storage material has extremely high phase-change temperature and relatively large energy storage density, the phase-change material is not easy to leak after phase change through a packaging technology, and the service life of an energy storage system can be prolonged by adopting the composite phase-change heat storage material.

The invention provides a myriameter deep oil-gas wall-fixing type water-based drilling fluid as well as a preparation method and application thereof, and belongs to the technical field of drilling fluids. The myriameter deep oil gas wall-fixing type water-based drilling fluid is prepared from the following raw materials in parts by weight: 100 parts of water, 1-5 parts of a modified clay shear strength improving agent, 2-4 parts of a hydrophobic association polymer flow pattern regulator, 3-8 parts of a blocking agent, 2-5 parts of a hyperbranched polymer filtrate reducer and 1-3 parts of a cementation blocking type wall-fixing agent. The invention also provides a preparation method of the drilling fluid. The components such as the flow pattern regulator, the plugging agent, the filtrate reducer and the wall-fixing agent are mutually matched and synergistic, so that the drilling fluid can keep good rheological, filtration, plugging and inhibition performances for a long time under the conditions of 240 DEG C and saturated salt, has a strong wall-fixing effect, can effectively maintain the stability of the well wall of an oil-gas well in the depth of 10,000 meters, and has a wide application prospect. And well collapse, well leakage, blowout and other complex well drilling are prevented, and the drilling tool can be used for drilling oil and gas wells with the depth of ten thousand meters.

The invention discloses a carbon ceramic composite friction material and a preparation method thereof. The carbon ceramic composite friction material is prepared from the following raw materials in parts by weight: 5-10 parts of short carbon fibers, 15-25 parts of ceramic fibers, 15-25 parts of calcium sulfate whiskers, 10-15 parts of microporous filler, 3-5 parts of a friction increasing regulator, 3-5 parts of a friction reducing regulator, 0.2-0.5 part of superfine silicon carbide, 0.05-0.1 part of a dispersing agent, 3-6 parts of polysilazane and 3-5 parts of high-temperature-resistant phenolic resin. And 0.5-1 part of polytetrafluoroethylene powder. Polysilazane is adopted to treat short carbon fibers, so that the carbon fibers form a good ceramic high-temperature-resistant layer, and high-temperature oxidation of the carbon fibers in the carbon-ceramic composite friction material is effectively prevented; the use amount of phenolic resin is reduced, and the high-temperature stability of the carbon-ceramic composite friction material is improved. Through cooperation of the friction-increasing modifier, the friction-reducing modifier, the calcium sulfate whiskers, the microporous filler and the polytetrafluoroethylene, the friction coefficient is kept stable at high temperature during braking, and abrasion caused during high-load braking is reduced. Long-time high-temperature sintering is not needed in the production process, and energy-saving and environment-friendly preparation of the carbon-ceramic friction material is achieved.

The invention relates to the technical field of redox flow batteries, in particular to an all-vanadium redox flow battery electrolyte based on bromo-hydrochloric acid and application of the all-vanadium redox flow battery electrolyte. The electrolyte comprises vanadium ions, hydrogen ions, bromide ions and chloride ions, wherein the molar concentration ratio of the chloride ions to the bromide ions is greater than or equal to 2; and the volume ratio of the positive electrode electrolyte to the negative electrode electrolyte is (0.5-0.95): 1. According to the electrolyte disclosed by the invention, on the basis of fully utilizing the capacity provided by vanadium, the capacity provided by bromine is effectively utilized through participation of bromine ions in an electrochemical reaction, so that the capacity of the all-vanadium redox flow battery is improved, and meanwhile, the energy cost is reduced; the electrolyte can improve the high-temperature stability of the all-vanadium redox flow battery.

The present invention relates to the technical field of polymer functional materials, and in particular to a micron-sized polymer microsphere and a preparation method and application thereof. First, a core layer emulsion is prepared by using a mixed monomer A under the action of an initiator, and then a shell layer emulsion is prepared by using a mixed monomer B. The shell layer emulsion is added dropwise to the core layer emulsion to form a micron-sized polymer microsphere under the action of an initiator. The micron-sized polymer microsphere of the present invention has good heat resistance and flame retardancy, good mechanical properties, can resist high temperature shrinkage, and has uniform and stable size.

The invention discloses a preparation process and application of a wear-resistant and high-temperature-resistant cable, and belongs to the technical field of cable material processing. In order to solve the technical problem that in the prior art, the wear resistance, heat resistance and heat conduction performance of cable materials for high-speed trains need to be further improved, the preparation technology of the wear-resistant and high-temperature-resistant cable comprises the following steps that a plurality of cable cores are arranged in the length direction of a hemp rope with the hemp rope as the axis, and rubber strips are filled among the cable cores; and then a polyester tape and cable core mixture is wrapped outside the plurality of cable cores and the filling strips. The composite graphene, polysiloxane and modified magnesia are used as reinforcing materials to reinforce a polyethylene base material, so that the mechanical strength and wear resistance of the cable material are effectively improved, and the flame retardant property, heat resistance and heat-conducting property of the cable material are also improved.

The invention relates to the technical field of protective films, in particular to a high-temperature-resistant low-viscosity adhesive-residue-free protective film and a preparation method thereof. In order to improve the adhesive residue-free performance of the protective film, 4-carboxyphenylboronic acid pinacol ester and bis (4-aminophenoxy) dimethylsilane are used as raw materials, and a boron-silicon intermediate containing free amino groups is prepared by controlling the change of reaction conditions and addition amount; wherein the boron element and the silicon element have good flame retardant property, the flame retardant property of the protective film can be effectively improved, the safety coefficient in the processing process is improved, and due to the introduction of the boron element and the silicon element, a-O-B-O-chain segment and a-O-Si-O-chain segment are introduced into the adhesive and have high bond energy, so that the flame retardant property of the protective film is improved. The high-temperature stability of the adhesive can be effectively improved, so that the adhesive still has excellent performance at high temperature, the cohesion of the adhesive can be effectively improved, and the adhesive residue phenomenon in the process of removing the protective film is avoided.

The invention belongs to the technical field of solid-state electrolytes, and particularly discloses a lithium gallium germanate modified PEO-based composite solid-state electrolyte, a preparation method thereof and a solid-state battery. The solid electrolyte comprises the following components: lithium gallium germanate, PEO and a lithium-based electrolyte, wherein the structural formula of the lithium gallium germanate is LiGaGe2O6. The molecular formula of the lithium gallium germanate in the prepared lithium gallium germanate modified PEO-based composite solid electrolyte is LiGaGe2O6, the lithium gallium germanate has high-temperature stability, excellent conductivity and a wide electrochemical stability window, and the PEO-based solid electrolyte can have higher conductivity and lithium ion transmission performance by adopting the lithium gallium germanate to modify a PEO-based solid battery.

The invention belongs to the field of composite materials, and particularly relates to a ceramic-based composite high-temperature wave-absorbing material and a preparation method and application thereof. The composite material provided by the invention comprises the following components: a fiber preform, a multi-layer interface, a wave-absorbing phase and a ceramic matrix, the fiber preform is a structural bearing part made of a composite material; the multi-layer interface is deposited on the surface of the fiber preform and comprises a PyC interface, a BN interface and a SiC interface; the wave-absorbing phase is dispersed in the fiber preform and is a bismuth layered structure ceramic phase; the ceramic matrix is filled in the fiber preform and the inner part and the surface of the multi-layer interface, and the components of the ceramic matrix are one or more of SiC, Si3N4 and SiCN. The composite material provided by the invention can keep relatively good wave-absorbing performance at high temperature, has excellent mechanical properties and thermal stability, and has wide application prospects in the fields of heat-resistant protection, aerospace, radar wave-absorbing, stealth technology, electronic warfare, communication shielding and the like.

The invention discloses a 19-electron NbCoSb thermoelectric material and a preparation method and application thereof, and particularly relates to the field of thermoelectric materials. Comprising the steps that Nb elementary substance powder, Co elementary substance powder and Sb elementary substance powder are placed in a high-energy ball mill to be subjected to mechanical alloying, and nanoscale NbCoSb compound precursor powder is obtained; the ball milling time of the high-energy ball mill is 12-24 hours; the nanoscale NbCoSb compound precursor powder is screened; and putting the screened nanoscale NbCoSb compound precursor powder into a graphite mold, and putting the graphite mold into a discharge plasma sintering furnace for sintering to obtain the N-type NbCoSb thermoelectric material. A large number of multi-scale nano structures and defects are introduced into the precursor, low thermal conductivity can be obtained while the electrical transport property is maintained, and then the high-performance thermoelectric material with good high-temperature stability is obtained.

The invention discloses high-viscosity and high-elasticity modified asphalt and an asphalt composition, belongs to the field of asphalt, and solves the technical problem that the existing asphalt material lacks high-viscosity and high-elasticity modified asphalt suitable for diversified climates. The high-viscosity and high-elasticity modified asphalt suitable for diversified climates is prepared from the following raw materials in parts by mass: 100 parts of road petroleum asphalt, 2.5-4 parts of an epoxidized modified styrene-butadiene-styrene block copolymer, 5-10 parts of a hyperbranched polyester modified styrene-isoprene-styrene block copolymer, 5-10 parts of tackifying resin, 1-3 parts of a coupling agent, 1-3 parts of a coupling agent, 1-3 parts of a coupling agent, 1-3 parts of an antioxidant and 1-3 parts of a lubricant. The modified asphalt is prepared from, by weight, 1-2 parts of rubber powder, 1-2 parts of oleamide, 2-3 parts of bagasse fibers and 2-10 parts of other functional auxiliaries. The modified asphalt has the advantages of being high in viscosity and elasticity, suitable for various climates and the like.

The invention relates to the technical field of thermal insulation coatings, and discloses a preparation process of a nanopore aerogel thermal insulation coating, which comprises the following steps: S1, preparing materials: 10-15 parts of modified silicon dioxide aerogel, 2-8 parts of deionized water, 3-6 parts of absolute ethyl alcohol, 8-12 parts of a catalyst, 5-7 parts of an n-hexane solvent, 2-6 parts of a dispersing agent and 2-4 parts of a defoaming agent. According to the preparation method, structural collapse of the silicon dioxide aerogel in the application process can be avoided, the heat insulation and heat preservation performance and mechanical performance of the aerogel heat insulation and heat preservation coating are remarkably improved, the heat insulation and heat preservation performance and mechanical performance of the aerogel heat insulation and heat preservation coating can be further improved, and the adhesion capacity of the coating is further improved.

The lithium ion secondary battery comprises a positive plate, a negative plate, electrolyte and a diaphragm, the negative plate comprises a negative current collector and a negative active layer arranged on the negative current collector, the negative active layer comprises a first active layer and a second active layer which are arranged on the surface of the negative current collector, and the second active layer is arranged on the surface, far away from the negative current collector, of the first active layer; the first active layer comprises a first negative electrode active material, and the first negative electrode active material comprises first graphite; the second active layer comprises a second negative electrode active material, and the second negative electrode active material comprises silicon carbon; the electrolyte comprises 1, 3, 6-hexane trinitrile, the mass content of the 1, 3, 6-hexane trinitrile in the electrolyte is 0.5 wt%-10wt%, and the battery provided by the invention has a relatively high cycle capacity retention ratio.

The invention discloses a photosensitive resin for SLA3D printing precision casting and a preparation method thereof. The preparation raw materials comprise the following components in percentage by mass: 40 to 60 weight percent of polyether acrylate resin oligomer, 30 to 50 weight percent of polyether monomer diluent, 3 to 6 weight percent of photoinitiator, 0 to 5 weight percent of coloring agent, 0.5 to 1 weight percent of polymerization inhibitor, 0.1 to 3 weight percent of nano filler, 10 to 15 weight percent of micronized wax powder and 0.1 to 1.5 weight percent of flatting agent. According to the photosensitive resin disclosed by the invention, the nano filler is introduced, so that the resin can keep high dimensional stability, mechanical property and compatibility with a molten metal solution under a high-temperature casting condition, and high temperature resistance, high strength, high toughness and high wear resistance are achieved; and wide application of the SLA3D printing technology in the high-precision and advanced fields of aerospace, automobile manufacturing, medical instruments and the like is promoted.

The invention discloses green low-carbon high-rutting-resistance asphalt concrete and a preparation method thereof, and relates to the technical field of asphalt concrete. The technical scheme is as follows: RAP accounts for 30-40% of the mass of a new aggregate, 53-65 parts of the new aggregate, 3.2-4.1 parts of new asphalt, 4-6 parts of mineral powder, 0.3-0.4 part of high-density oxidized polyolefin, 0.05-0.1 part of a drying agent, 0.05-0.1 part of a lead salt stabilizer, 0.05-0.1 part of an auxiliary agent, 1.5-3 parts of reactive polyurethane, 3-6 parts of a polyester modifier, 0.5-2 parts of a silane coupling agent, 0.1-0.5 part of an antioxidant and 0.5-2 parts of a dispersing agent. Through the synergistic effect of high-density oxidized polyolefin and reactive polyurethane, the performance of aged asphalt in RAP is improved, the rutting resistance of asphalt concrete is improved, VOC emission is reduced, the sustainability of the material is enhanced, the long-term durability is improved, and the service life of a road is prolonged.

The invention belongs to the technical field of papermaking dyes, and particularly relates to an environment-friendly dye for papermaking and a preparation method thereof. According to the invention, the sulfonate surfactant is prepared by a two-step method, and the sulfonate surfactant has excellent dispersibility, stability and emulsibility, and has good compatibility with alkaline auramine O; the sulfonate surfactant is compounded with the alkaline bright yellow O for use, so that the solubility, dispersion stability and high-temperature stability of the alkaline bright yellow O dye can be remarkably improved in manners of reducing interfacial tension, increasing wettability, improving permeation and the like. When the prepared environment-friendly dye is used for dyeing paper, the dye-uptake and the color fastness to light of the dye can be obviously improved, the dyeing uniformity and effect are improved, the dye waste is effectively reduced, and the requirement of green development is met.

The invention discloses a graphene composite modified asphalt concrete material for an ultrathin overlay and a preparation method, and belongs to the technical field of asphalt concrete. Comprising 70 to 85 parts of petroleum asphalt, 18 to 25 parts of activated rubber powder, 1.5 to 2.5 parts of an SBS modifier, 0.15 to 0.25 part of a stabilizer, 0.1 to 0.3 part of an auxiliary agent, 0.5 to 1 part of PVDF, 0.5 to 1 part of modified basalt fiber, 0.6 to 1 part of graphene oxide powder and 0.3 to 1 part of ceramic powder. The preparation method comprises the following steps: mixing PVDF, modified basalt fiber, graphene oxide, ceramic powder and an auxiliary agent, uniformly dispersing, adding petroleum asphalt and an SBS modifier, and fully stirring; the materials are subjected to high-temperature and high-pressure colloid over-grinding, and after over-grinding is sufficient, activated rubber powder is added for over-grinding again; finally, a stabilizer is added for development, and the graphene composite modified asphalt concrete material is prepared after development is finished. The concrete material has super-strong oil film binding power and excellent high-temperature stability, denaturation resistance and dynamic stability, and can meet the requirements of heavy traffic.

The invention discloses an inorganic / organic nano composite plugging agent, which is prepared from the following raw materials in parts by weight: 0.7 to 3.5 parts of modified nano particles, 10 to 50 parts of alkenyl amide monomers, 0.5 to 3 parts of alkenyl associated monomers, 20 to 50 parts of alkenyl sulfonic acid monomers, 10 to 20 parts of alkenyl cationic monomers and 0.5 to 1.0 part of initiators, the modified nano-particles are formed by carrying out surface modification on nano-particles by adopting a coupling agent. According to the invention, by introducing a flexible polymer chain segment with a proper amount of association, strong adsorption and other effects into rigid nanoparticles, the deformability of the nanoparticles and the connection force between the nanoparticles and a shale stratum are improved, so that the plugging capability of the plugging agent on multi-scale micro-pores and micro-cracks of the shale stratum is improved; and the plugging agent has the characteristics of wide particle size distribution, physical and chemical synergistic plugging effect, good high-temperature stability, simple preparation method, easily available raw materials and the like, and is suitable for drilling leakage of shale formations.

The invention discloses a hydrophilic graphene dispersion liquid for PCB hole metallization, and belongs to the technical field of circuit board processing, the hydrophilic graphene dispersion liquid comprises the following components by mass: 1-5% of boron-doped graphene, 1-5% of boron-doped graphene quantum dots, 10-40% of polypyrrole, 0.5-1% of a dispersant, and 0.5-2% of a surfactant. The second purpose of the invention is to provide a preparation method of the hydrophilic graphene dispersion liquid for PCB hole metallization, the dispersion liquid is subjected to boron doping treatment on graphene and graphene quantum dots, so that the overall conductivity is enhanced, the hydrophilicity is enhanced, the dispersion liquid has excellent dispersity, and the hydrophilicity of the dispersion liquid is improved. Through the synergistic effect of polypyrrole, boron-doped graphene and boron-doped graphene quantum dots, the stability and adhesion of the composite material are further enhanced.