3544results about How to "Good dispersion" patented technology

The invention belongs to the technical field of biodegradable materials, and particularly relates to an environment-friendly degradable modified composite material, a preparation method and application. The material comprises PBAT, PBS, PLA, an inorganic mineral filler, natural plant fibers, PBAT-PTMO, nano-silica, an auxiliary agent and a plasticizer. In the preparation process, PLA is prevented from being hydrolyzed in vacuum drying, calcium carbonate and nano silicon dioxide are preheated and activated, natural plant fibers are dispersed through steam explosion and ethanol treatment, and raw material pretreatment comprises high-speed mixing and agglomeration breaking and medium-speed secondary premixing so as to realize uniform distribution. The co-rotating twin-screw extruder accurately controls the temperature, the speed, the rotating speed and the length-diameter ratio, and ensures melting plasticizing, uniform mixing and stable extrusion molding. According to the invention, by adopting accurate proportioning of multiple raw materials and a modification treatment process, the properties of mechanics, degradation, processing and the like of the material are synergistically improved, and the material is widely applied to multiple fields such as packaging bags, disposable tableware and agricultural plastic mulching films.

The invention provides a high-temperature-resistant carbon fiber reinforced phenolic resin composite material and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out high-temperature oxidation treatment on carbon fibers; secondly, carrying out surface modification on the carbon fibers by using a chemical modifier; then mixing the modified carbon fiber, an antioxidant and a dispersing agent to prepare slurry; performing vacuum filtration on the prepared slurry, and drying to obtain a carbon fiber blank; preparing a phenolic resin infiltration solution, and impregnating the carbon fiber blank with the phenolic resin infiltration solution; and finally, carrying out mold pressing and curing to obtain the high-temperature-resistant carbon fiber reinforced phenolic resin composite The preparation method is simple in required equipment, convenient to operate, stable in process, high in production efficiency and suitable for large-scale industrial production. According to the high-temperature-resistant carbon fiber reinforced phenolic resin composite material prepared by the preparation method, the bonding property between the carbon fiber and the phenolic resin is improved, certain toughness and strength are provided, and meanwhile, the high-temperature-resistant carbon fiber reinforced phenolic resin composite material has the advantages of ablation resistance, good oxidation resistance in a high-temperature environment and the like.

The invention discloses a high-temperature-resistant epoxy insulating material for a transformer and a preparation method thereof, and belongs to the technical field of insulating materials. The high-temperature-resistant epoxy insulating material for the transformer is prepared from the following components in parts by weight: 50 to 60 parts of bisphenol A epoxy resin, 20 to 50 parts of anhydride curing agent, 10 to 20 parts of modified composite filler and 5 to 10 parts of epoxidized hydroxyl-terminated liquid polybutadiene, wherein the modified composite filler is a mixture of first boron nitride, second boron nitride and silicon nitride grafted with a silane coupling agent and dopamine, and the mass ratio of the first boron nitride to the second boron nitride to the silicon nitride is (1-2): (2-4): 1. The high-temperature-resistant epoxy insulating material for the transformer has excellent mechanical property, insulating property, heat-conducting property and high-temperature aging resistance.

The invention relates to the technical field of building materials, and particularly discloses high-strength lightweight concrete containing hollow glass beads and a preparation method of the high-strength lightweight concrete. The high-strength lightweight concrete containing the hollow glass beads is prepared from cement, fly ash, carbon fiber grafted hollow glass beads, lightweight sand, deionized water, polypropylene fiber grafted rubber particles and a water reducing agent according to the mass ratio of (58-75): (25-38): (45-65): (20-40): (42-55): (35-55): (5-12) through mixing, mold filling, vibration molding, covering and demolding. The addition amount of the hollow glass beads is strictly controlled, the influence on the overall strength of the concrete is avoided, the density and weight of the concrete are reduced due to the addition of the light sand and the hollow glass beads, the compactness and integrity of the concrete are improved due to the synergistic effect of the two added fibers, and the raw materials have excellent cohesiveness; the concrete can effectively absorb and disperse stress, and has the advantages of excellent strength, light weight, good durability and excellent comprehensive performance.

The invention belongs to the technical field of metal powder preparation, and discloses a method for preparing silver powder through reduction of hydrazine hydrate with the adjustable particle size. The preparation method comprises the following steps that a first dispersing agent is dissolved in deionized water, a silver-ammonia solution and a hydrazine hydrate solution are sequentially added, stirring reaction is conducted, and nano-silver seed crystal sol is obtained; uniformly mixing the obtained nano-silver seed crystal sol with a hydrazine hydrate solution and a second dispersing agent to obtain a reducing base solution; adding a surface modifier into absolute ethyl alcohol, and uniformly dissolving to obtain a surface modification coating solution; preparing a silver-ammonia solution, adding the prepared silver-ammonia solution into the reducing base solution, then adding the surface modification coating solution, and stirring for reaction to obtain silver powder slurry liquid; and after solid-liquid separation, a solid phase is taken, washed and dried, and silver powder is obtained. The preparation method is simple in process, the particle size of the silver powder can be adjusted through the adding amount of the seed crystal, and the prepared silver powder particles are uniform in particle size distribution, high in dispersity and suitable for the fields of conductive silver paste, electronic packaging and the like.

The preparation method comprises the following steps: mixing a tannic acid solution and a tetravalent cerium salt solution, adjusting the pH value to 9-11, and reacting to obtain the cerium tannate nano-enzyme, the molar ratio of the tannic acid to the tetravalent cerium salt is (1-4): 1; the hydration dynamic diameter of the cerium tannate nano-enzyme is 20 to 80 nm. The TA-Ce nano-enzyme prepared by the preparation method disclosed by the invention is smaller in particle size, can keep stable and good dispersibility in a physiological environment, and has good biocompatibility, low hemolysis rate and small systemic toxicity; meanwhile, the compound has good kidney targeting property, can be effectively enriched into the injured kidney, eliminates various ROS (reactive oxygen species) and relieves oxidative stress by utilizing unique redox cycle between Ce < 3 + > and Ce < 4 + > states, and has a good effect in treating acute kidney injury induced by rhabdomyolysis and / or cis-platinum. The research lays a foundation for the metal polyphenol nano material in the treatment of acute kidney injury.

The invention discloses an optimized preparation method of a high-strength flame-retardant polyamide-based composite material in the technical field of information, which comprises the following steps: in the preparation process of the composite material, acquiring online dispersed state monitoring data of a modified filler by using a laser particle size analyzer and an optical microscope, including particle size distribution, agglomeration degree and dispersion uniformity of the filler; according to online dispersion state monitoring data, parameter ranges of melt flow property characterization are determined, the parameter ranges comprise the shearing rate and the temperature, particle size distribution data are used for determining the shearing rate range, small particle size distribution corresponds to the high shearing rate range, and agglomeration degree data are used for determining the temperature range; the higher degree of agglomeration corresponds to a higher temperature range to promote the dispersion of the filler, and these parameters are directly used to guide the setting of the subsequent rheological test.

The invention relates to a catalyst for ethylene oxide ring-opening polymerization and a preparation method thereof, and belongs to the technical field of high polymer material synthesis, and the catalyst is a composite structure based on a silicon dioxide nanoparticle loaded bimetal organic complex; a modified nitrogen-containing polydentate ligand is prepared by adopting a special method, is coordinated with metal ions through covalent bonds and is loaded on silicon dioxide nanoparticles; by utilizing the high dispersity and stability of the silicon dioxide nanoparticles and the synergistic catalytic effect of the bimetal organic complex, the catalytic effect is effectively improved, the polymerization process is accelerated, the polymerization stability is enhanced, the polymerization molecular weight is improved, and the distribution is narrow.

The invention relates to the technical field of epoxy resin paint, and discloses waterborne epoxy paint suitable for containers and a preparation method of the waterborne epoxy paint. A component A of the waterborne epoxy paint comprises, by weight, 100 parts of waterborne epoxy resin and 0.5-0.8 part of a flash rust inhibitor; the component B comprises 6-8 parts by weight of a polyamide curing agent, 5-12 parts by weight of an organosilicon sulfonate polyurethane toughening agent and 0.2-1 part by weight of graphene oxide; the organic silicon polyurethane flexibilizer can play a role of a dispersing agent, the dispersity of graphene in the waterborne epoxy paint is improved, the main chain of the organic silicon polyurethane flexibilizer contains imino groups, the organic silicon polyurethane flexibilizer can be subjected to a curing reaction with epoxy resin, a flexible organic polysiloxane molecular chain is bonded into an epoxy resin molecular chain, and the flexibility of the waterborne epoxy paint is improved. A good toughening effect is achieved, so that the flexibility, the impact resistance and the corrosion resistance of a paint film are improved.

The invention relates to the technical field of fibers, and discloses an ultrahigh-moisture-absorption anti-static polyester fiber and a preparation method thereof. The preparation method comprises the following steps: carrying out nucleophilic substitution reaction on 1, 2-benzisothiazolin-3-one and methacryloyl chloride to obtain modified benzisothiazolinone; the preparation method comprises the following steps: carrying out nucleophilic substitution reaction on phosphonitrilic chloride trimer and allylamine, and then carrying out nucleophilic substitution reaction on the phosphonitrilic chloride trimer and melamine again to obtain modified cyclophosphazene; the preparation method comprises the following steps: mixing gamma-methacryloxypropyltrimethoxysilane with aluminum zinc oxide for reaction, and mixing the obtained modified aluminum zinc oxide with modified benzisothiazolinone and modified cyclophosphazene for copolymerization in the presence of an initiator to obtain a flame-retardant antibacterial additive; mixing the flame-retardant antibacterial additive, calcium carbonate and polyethylene glycol terephthalate, performing melt spinning, and performing acid treatment to obtain modified polyester fibers; dipping the modified polyester fiber in a finishing liquid containing modified chitosan to obtain the ultrahigh-moisture-absorption anti-static polyester fiber.

The invention discloses equipment and a method for preparing spray condensation microcapsules, and relates to the technical field of spray condensation microcapsule preparation, the equipment comprises a melting homogenizing kettle and a condensing tower, a spray head is arranged in the condensing tower, and a movable spray mechanism used for enabling the spray head to move circumferentially and swing back and forth at the same time is mounted on the condensing tower. Through the arrangement of the movable spraying mechanism, the spraying head can spray material liquid drops in the condensing tower in a back-and-forth swinging manner while moving circumferentially, so that the material liquid drops can be uniformly dispersed in a wider area and can be in contact with more cold air, local supercooling or superheating is avoided, and a more uniform cooling effect is obtained; meanwhile, through the matched arrangement of the spiral blades, cooling airflow can spirally flow and be uniformly distributed, the gas-liquid contact area is increased, the gas-liquid contact time is prolonged, gas-liquid exchange is more sufficient, finally, it can be ensured that each material liquid drop can be sufficiently cooled, and the embedding efficiency and the quality of microcapsules are effectively improved.

The invention discloses a waterproof heat-resistant adhesive and a preparation method thereof, and relates to the technical field of adhesives. Tetramethyltri-3-trifluoropropyl cyclotetrasiloxane is used as a raw material to prepare hydroxyl-terminated organic fluorosilicone oil and modified epoxy resin, fluorine atoms are closely arranged around a main chain of the hydroxyl-terminated organic fluorosilicone oil and modified epoxy resin in an umbrella shape, and the hydroxyl-terminated organic fluorosilicone oil and modified epoxy resin cooperate with organic silicon to improve the waterproof and heat-resistant effects; hydroxyl groups on the oxidized carbon nanofibers are reacted and combined with thiocyanate in vulcanized rubber powder, and hybrid filler is formed; residual active groups on the surface of the oxidized carbon fiber are combined and crosslinked with epoxy resin, so that the heat resistance of the epoxy resin is greatly improved; secondly, phenyl maleic anhydride is used as a cross-linking agent to form a three-dimensional cross-linked structure, and meanwhile, phenyl is introduced into the structure, so that the heat-resistant effect and the waterproof effect of the epoxy resin are further improved, and the adhesive prepared by taking the epoxy resin as the raw material has excellent waterproof and heat-resistant performance. The adhesive prepared by the invention has waterproof and heat-resistant effects.

The invention discloses a waterborne epoxy resin coating, a preparation method and application in bridge protection, and belongs to the technical field of coatings. The water-borne epoxy resin coating comprises the following raw material components in parts by weight: 15-25 parts of epoxy composite resin emulsion, 100 parts of emulsified asphalt, 3-5 parts of a curing agent and 6-10 parts of water, wherein the epoxy composite resin emulsion is obtained by carrying out a composite reaction on 30-60 parts by mass of epoxy resin, 2-3 parts by mass of an emulsifier, 6-9 parts by mass of an acrylate composition and 1.4-1.6 parts by mass of a co-stabilizer; the acrylate composition is prepared by prepolymerizing 15 to 16 parts by mass of butyl methacrylate, 10 to 12 parts by mass of 2-isopropenyl aniline, 5 to 7 parts by mass of allyl glycidyl ether and 1 to 1.2 parts by mass of allyl polyhedral oligomeric silsesquioxane and then combining the prepolymerized materials with 1 to 3 parts by mass of acrylic acid.

The invention discloses a UV photocureable coating as well as a preparation method and application thereof in automobiles, and relates to the technical field of coatings. When the UV photocureable coating is prepared, 4-aminophenylboronic acid is dehydrated to prepare aminated boron oxygen six-ring; carrying out a reaction on the aminated boroxane and diallyl chlorophosphate to prepare functionalized boroxane; the preparation method comprises the following steps: sequentially reacting graphene oxide with 3-chloropropyltriethoxysilane and 1, 3-diallyl-1, 3, 5-triazine-2, 4, 6-triketone, so as to obtain modified graphene; the preparation method comprises the following steps: reacting epoxy resin with 2-butenal thiosemicarbazone to prepare modified epoxy resin; and uniformly mixing the modified epoxy resin, the epoxy acrylate resin, the modified graphene, the functionalized boroxane, the 1, 6-hexanediol diacrylate and the 1-hydroxycyclohexyl phenyl ketone, so as to obtain the UV photocureable coating. The UV photocureable coating prepared by the invention has excellent flame retardant, self-repairing and mechanical properties.

The invention relates to the technical field of catalysts for gas purification, in particular to a hierarchical pore metal-based catalytic adsorbent as well as a preparation method and application thereof. The invention discloses an integrated preparation method combining a sol-gel method and a template method, which comprises the following steps of: adding a template agent before forming gel, adding a proper amount of ammonia water in an aging process, accurately controlling other reaction conditions and a raw material ratio, and controlling a spatial confinement effect of the template method and a chemical reaction in a sol-gel process to obtain a sol-gel composite material. The morphology and size of the catalytic adsorbent can be accurately regulated and controlled, the hierarchical pore metal-based catalytic adsorbent with a microporous structure as a main material and mesopores and macropores as coexistence is finally prepared, the hierarchical pore structure provides rich adsorption sites and catalytic activity centers, and the hierarchical pore metal-based catalytic adsorbent has high adsorption capacity, high selectivity, good catalytic activity, good stability and easy regeneration.

The invention discloses a ZnFeP-particle gradient abrasion-resistant chemical composite coating and a preparation method of the ZnFeP-particle gradient abrasion-resistant chemical composite coating. The ZnFeP-particle gradient abrasion-resistant chemical composite coating is divided into a passivation layer, a low-iron ZnFeP-particle chemical composite coating and a high-iron ZnFeP-particle chemical composite coating from outside to inside, and a gradient coating with the corrosion potential from low to high is formed; the content of iron in the low-iron ZnFeP-particle chemical composite coating ranges from 0.03 wt% to 1.0 wt%, the thickness of the low-iron ZnFeP-particle chemical composite coating ranges from 8 micrometers to 18 micrometers, and the hardness of the low-iron ZnFeP-particle chemical composite coating ranges from 150 HV to 300 HV. The content of iron in the high-iron ZnFeP-particle chemical composite coating ranges from 5 wt% to 30 wt%, the thickness ranges from 8 micrometers to 18 micrometers, and the hardness ranges from 500 HV to 650 HV. By means of the ZnFeP-particle gradient abrasion-resistant chemical composite coating, a metal component can be resistant to abrasion and corrosion, and therefore the service capacity of the metal component such as electric power fittings in the abrasion working condition is obviously improved.

The invention relates to cerium oxide-based polishing powder and a preparation method thereof, a polishing solution and application, the cerium oxide-based polishing powder comprises porous secondary particles assembled by a plurality of primary crystal grains, the primary crystal grain aperture is 2-30 nm, the pore volume is 0.10-0.50 cm < 3 > / g, the specific surface area is 10-80 m < 2 > / g, and the content of surface trivalent cerium accounts for 10-40% of the total surface cerium content. The microstructure of the cerium oxide-based polishing powder is porous cerium oxide-based particles assembled by nano primary particles, and the self-assembly structure enables the cerium oxide-based polishing powder to have higher specific surface area while having higher surface trivalent cerium content, so that higher polishing rate can be obtained; due to the submicron particle size, the dispersity of the polishing slurry is improved; the Young modulus of the polishing powder is reduced due to the porous structure, so that the polishing powder is not easy to break in the polishing process, the surface precision of a polished workpiece is improved, and the service life of the polishing powder is prolonged. Therefore, the cerium oxide-based polishing powder provided by the invention has excellent polishing rate and polishing precision at the same time, and has relatively long service life.

The invention relates to a high-performance polymer-cement-based composite repair material and a preparation method thereof, and the high-performance polymer-cement-based composite repair material comprises the following components by mass: 690-710 parts of cement; 130 to 150 parts of fly ash; 45 to 55 parts of silica fume; 200 to 210 parts of mixing water; 950 to 1050 parts of fine aggregate; 21-23 parts of a modified polymer; 9-10 parts of an expanding agent; 4-5 parts of a water reducing agent; 5-6 parts of modified fiber; and 0.16 to 0.18 part of a defoaming agent. The nano-toughened modified polymer and the modified fiber are used, the nano-modified polymer can improve the microstructure of the repair material, the modified fiber can limit shrinkage of the repair material and enhance the crack resistance of a matrix, the toughness and the mechanical property of the repair material can be effectively improved through the synergistic effect of the nano-modified polymer and the modified fiber, and it is guaranteed that the repair material does not crack in the early stage.

The invention relates to the field of high polymer materials, and discloses a degradable environment-friendly plastic, which comprises 20-50% of polylactic acid, 10-30% of polyhydroxyalkanoate, 5-20% of a starch-based material, 1-10% of a nano reinforcing agent, 0.5-5% of a self-repairing microcapsule, 2-10% of a bio-based plasticizer, and 0.1-3% of a natural antioxidant. Compared with an environment-friendly plastic scheme only adopting a single component of PLA or PHA in the prior art, the environment-friendly plastic disclosed by the invention adopts a composite formula comprising polylactic acid, polyhydroxyalkanoate, a starch-based material, a nano reinforcing agent, a self-repairing microcapsule, a bio-based plasticizer and a natural antioxidant; according to the present invention, the overall performance of the material is improved, and the degradation rate and the degradation process are optimized, such that the plastic material can maintain the high strength and the high toughness, and can be efficiently degraded in the natural environment so as to effectively solve the problems of incomplete degradation and insufficient mechanical property of the traditional single material.

The invention discloses a multi-element synergistic flame-retardant modified coating and a preparation method thereof, and is characterized in that the multi-element synergistic flame-retardant modified coating comprises the following components in parts by weight: 80-100 parts of water-borne epoxy resin, 10-20 parts of a multi-element composite flame retardant, 40-50 parts of a curing agent and 10-15 parts of deionized water; the multi-component composite flame retardant is formed by compounding organic flame-retardant modified Al (OH) 3, organic flame-retardant modified Mg (OH) 2 and organic flame-retardant modified zinc borate. The preparation method comprises the following steps: mixing the water-borne epoxy resin, the multi-component composite flame retardant and the deionized water to obtain a prefabricated coating; and mixing the prefabricated coating with a curing agent to obtain the multi-element synergistic flame-retardant modified coating. The flame-retardant coating disclosed by the invention has excellent flame-retardant property.

The invention relates to the technical field of solid electrolyte, in particular to normal-temperature surface modified flexible oxide solid electrolyte and a preparation method and application thereof. The normal-temperature surface-modified flexible oxide solid electrolyte is prepared from the following raw materials: a monomer, polyethylene oxide, a solvent, an initiator, a modified oxide ceramic electrolyte and electrolyte salt, wherein the mass of the monomer is 1-10% of the total mass of the components; the molar ratio of the initiator to the monomer is 0.01%-0.1%; the molar ratio of the electrolyte salt to the monomer is 1: (6-12); the mass ratio of the electrolyte salt to the modified oxide ceramic electrolyte is 1: (2.5-5). The flexible oxide solid electrolyte has high conductivity, wide temperature tolerance range and high structural stability, and when the flexible oxide solid electrolyte is applied to an all-solid-state lithium metal battery, the ionic conductivity, safety and cycle performance of the battery are improved.

The invention relates to the field of thermal insulation materials, and provides a wet-process ceramic nanofiber thermal insulation material and a preparation method thereof.The wet-process ceramic nanofiber thermal insulation material is prepared from, by weight, 50-70 parts of ceramic nanofiber, 15-25 parts of modified glass fiber, 5-15 parts of inorganic functional filler, 4-10 parts of dispersing agent and 2-6 parts of adhesive; and 200 to 300 parts of deionized water. The wet-process ceramic nanofiber thermal insulation material provided by the invention has the characteristics of high strength, high flexibility and high thermal insulation property, and has better commercial application value.

The invention belongs to the technical field of civil engineering materials, and provides an early-strength high-fluidity geopolymer grouting material and a preparation method thereof. The method comprises the following steps: firstly, carrying out heat treatment and chemical regulation on fly ash and granulated blast furnace slag to generate a pre-reaction phase with high reaction activity, and improving the alkali excitation reaction efficiency; then, by preparing a lubricating particle dispersion liquid and utilizing the synergistic effect of a silane coupling agent and interface lubricating particles, the uniform dispersity of the particles is enhanced; by adding the ionic liquid and the functionalized acylamino polymer, the dissolution and activation of the aluminosilicate are accelerated by utilizing the high polarity, the ion shielding effect and the dissolution enhancing performance of the ionic liquid; meanwhile, the amido polymer inhibits particle aggregation and stabilizes the particle dispersion state through the adsorption effect, the amido polymer and the amido polymer cooperate to form a lubricating layer in the slurry, reduce the viscosity of the slurry and improve the fluidity, and the early strength of the material is further improved by accelerating the generation of a gel phase.