44results about How to "Improve dispersion" patented technology

The invention relates to the technical field of water and fertilizer drip irrigation, in particular to a biogas slurry, water and fertilizer integrated drip irrigation machine. Comprising a filter cartridge which is coaxially arranged in the outer cylinder, a coarse filter screen, a fine filter screen, a first scraper blade and a second scraper blade are arranged in the filter cartridge, water permeable holes are annularly and uniformly formed in the outer side wall of a lower cavity, and a water outlet is formed in the outer side wall of the lower cavity. And a blow-off pipe communicated with the filter cartridge is arranged at the bottom of the outer barrel. By means of multi-layer fine filtering combination, biogas slurry is purified at an irrigation inlet, impurities are reduced, a drip irrigation head is prevented from being blocked, and the irrigation efficiency is improved; the rotary driving mechanism regularly drives the scraping plate to accurately scrape impurities, and automatic cleaning and discharging are achieved by means of the locking opening and closing device and the movable sealing plate; the flow guide cover optimizes biogas slurry dispersion, deals with unstable supply and reduces pipe inlet pressure.

The invention discloses a liquid crystal compound, a liquid crystal composition and a phase difference film, relates to the technical field of liquid crystal display, and aims to solve the problems of poor alignment order degree, low n value and low crosslinking completion degree in an existing liquid crystal system. The structural general formula (I) of the liquid crystal compound is set, and the liquid crystal compound is applied to the phase difference film. According to the liquid crystal compound, a long liquid crystal main chain is adopted, so that liquid crystal molecules are arranged more orderly, dense chromophoric group arrangement is achieved, Van der Waals force and hydrogen-bond interaction among the liquid crystal molecules are improved, the alignment order degree and the n value are improved, and the purposes of improving dispersion, lowering the manufacturing cost, lowering the film thickness requirement and improving the crosslinking completion degree are achieved.

The invention discloses high-temperature and high-pressure filtrate reducer sulfonated asphalt for drilling fluid and a preparation method of the high-temperature and high-pressure filtrate reducer sulfonated asphalt, and belongs to the technical field of filtrate reducers. A comb-shaped side chain is introduced into a benzene ring of SEBS, the benzene ring is endowed with a comb-shaped structure, the structure strongly interacts with sulfonated asphalt, asphalt dispersion is optimized, agglomeration is avoided, 5-(2-hydroxyethyl) uracil is introduced, the oleophylic and hydrophilic characteristics are balanced, the acting force between asphalt particles is reduced, the reaction efficiency and uniformity of asphalt and fuming sulfuric acid are improved, and the sulfonated asphalt is prepared. The dispersant promotes uniform dispersion of asphalt, accelerates sulfonation reaction and improves sulfonated asphalt quality. The surface activity of the modified SEBS and the sulfonated asphalt form a net structure, so that the water solubility of the asphalt is enhanced, the drilling fluid is convenient to blend, the liquid surface tension is reduced, and the bubble formation condition is destroyed. A quaternary ammonium salt group is introduced, a well wall is stabilized by utilizing an opposite attraction principle, clay hydrophobicity is promoted, hydration and expansion are inhibited, and collapse is prevented. The modified sulfonated asphalt is resistant to temperature and pressure, good in filtration resistance and stable in filtration control at high temperature and high pressure.

The invention discloses a high beam illumination module, and relates to the technical field of car lamps, the high beam illumination module comprises an outer lens unit, an inner lens unit and a light source, the outer lens unit is of an integrally formed structure, and comprises a light emitting surface, a first total reflection surface and a second total reflection surface; the first parallel light enters from the light-emitting surface, is converged by the light-emitting surface and then is sequentially reflected by the first total reflection surface and the second total reflection surface to become second parallel light, and the longitudinal convergence degree is greater than the transverse convergence degree; light emitted by the light source forms middle parallel light after passing through the inner lens unit, and the middle parallel light is reflected by the second total reflection surface and the first total reflection surface in sequence and is finally emitted out from the light emitting surface to form a high beam light type wide in transverse direction and narrow in longitudinal direction. The first total reflection surface and / or the second total reflection surface are / is provided with a plurality of micro-arc-shaped concave surfaces so that light rays incident from the inner lens unit can be transversely expanded, the emitted high beam light pattern can be further transversely expanded, and the high beam light pattern is more uniform.

The invention belongs to the technical field of hexafluoroethane purification, and particularly relates to a purification process and a purification device of electronic-grade hexafluoroethane. The purification process of the electronic-grade hexafluoroethane comprises the following steps: introducing a hexafluoroethane crude product into a preprocessor, and carrying out pretreatment; introducing the crude product treated by the pretreater into an adsorption tower for adsorption; introducing the adsorbed crude product into a condenser to remove non-condensable gas so as to obtain crude product condensate, and introducing the crude product condensate into an alkali washing tank for alkali washing; and the alkali-washed crude product sequentially enters a degassing tower and a rectifying tower, and is degassed and rectified to obtain the electronic-grade hexafluoroethane product. According to the purification process of the electronic-grade hexafluoroethane, the pretreatment agent and the adsorbent are designed, so that the purity of the hexafluoroethane reaches 99.999%, the conversion of pentafluoromonochloroethane and the removal of trifluoromethane are realized, the process is simple, and the energy consumption is low; the invention also provides a purification device corresponding to the purification process of the electronic-grade hexafluoroethane.

The invention relates to the technical field of waterproof coiled materials, and particularly discloses a high-strength PVC (polyvinyl chloride) waterproof coiled material and a preparation method thereof, and the high-strength PVC waterproof coiled material is prepared from polyester fabric, a PVC coiled material and glass fiber gridding cloth in a hot-pressing compounding manner. The polyvinyl chloride coiled material is obtained by blending and extruding composite modified nano silicon dioxide, polyvinyl chloride, polyvinylidene fluoride and other auxiliaries, wherein the composite modified nano silicon dioxide takes nano silicon dioxide as a core and poly (butyl acrylate) as a shell, and the surface of the composite modified nano silicon dioxide contains amino groups. Compared with a common PVC waterproof coiled material, the high-strength PVC waterproof coiled material disclosed by the invention is high in strength, good in toughness, and improved in heat-resistant stability and ultraviolet aging resistance.

The invention provides a high-strength high-toughness low-smoke halogen-free flame-retardant rat-proof cable sheath material and a preparation method thereof, and the cable sheath material comprises the following raw materials: 80.0-100.0 parts of a polymer matrix, 80.0-100.0 parts of an inorganic flame retardant, a functional biomass rat-proof agent, 2.0-4.0 parts of a vulcanizing agent and 0.5-1.0 part of a vulcanization accelerator, wherein the functional biomass rat-proof agent is prepared from bio-based dihydric alcohol, bio-based diisocyanate and capsaicin through a one-pot method, and the cable sheath material is obtained by adding the raw materials into an extruder in proportion for melting, blending and extruding and then carrying out cooling curing, traction, grain-sized dicing and drying. The obtained cable sheath material has high strength, high toughness, high flame retardance and long-acting rat-proof performance, and meets the requirements of high mechanical property, flame retardance and long-acting rat-proof performance of materials in the field of cables.

The invention relates to the technical field of optical glass manufacturing, in particular to high-refractive-index glass as well as a preparation method and application thereof. The transition metal is less than 4 ppm by mass, and the transition metal comprises one or more of Fe, Cr, Ni, Cu, Mn, Co and V; the oxide is prepared from the following components in mole percent based on the oxide: 17 mol% to 49 mol% of Bi2O3, 2.7 mol% to 15.7 mol% of Nb2O5, 8.5 mol% to 39 mol% of TeO2, 2 mol% to 19.5 mol% of P2O5, 11.3 mol% to 41 mol% of B2O3, 0 mol% to 1 mol% of TiO2, 0 mol% to 1 mol% of Ta2O5, 0 mol% to 1 mol% of WO3 and 0.5 mol% to 16.5 mol% of ZnO, and Bi2O3 / (TeO2 + TiO2 + WO3 + Nb2O5 + Bi2O3) * 100 is more than or equal to 30 and less than or equal to 75. Tests show that when the thickness of the glass is 10 mm, the refractive index of the glass is 2.09-2.35, and the transmittance of the glass with the wavelength lambda 70 smaller than 450 nm is 82.4%-96.8%. The problems that in the prior art, high-refractive-index glass is low in refractive index and light transmittance and low in performance and cost ratio, and the increasingly-developed visual experience and development requirements of head-mounted displays cannot be met are solved.

The invention belongs to the field of catalyst preparation technology and application, and relates to preparation of a Pd / C catalyst and a method for synthesizing phenylacetic acid from benzyl chloride by using the Pd / C catalyst. The method comprises the following steps: S1, preparation of a Pd / C catalyst: preparing a high-dispersity, high-activity and stable catalyst by improving the process, obtaining a high conversion rate by only using 0.2% of the catalyst, and having excellent reusability; and S2, synthesizing phenylacetic acid: taking benzyl chloride and CO as raw materials, adding the prepared high-activity Pd / C catalyst, and optimizing a reaction process to obtain high-yield and high-purity phenylacetic acid. The prepared catalyst shows an excellent catalytic effect, the production method is simple in step and mild in reaction condition, the yield of the obtained phenylacetic acid is relatively high, the used solvent can be recycled, the cost is greatly saved, and the method is suitable for large-scale industrial production.

The present application belongs to the technical field of biomass catalytic conversion, and particularly relates to a method for preparing polyols by hydrogenation of furfural and its derivatives. The method comprises the following steps: taking furfural and its derivatives as raw materials, hydrogen as hydrogen source, and simultaneously adding a catalyst La2CuO4 / Cu to perform ring-opening reaction to obtain polyols. The catalyst La2CuO4 / Cu has excellent catalytic activity in the reaction of hydrogenation conversion of furfural and its derivatives into polyols, has high activity and selectivity for the rupture of C-O bonds of reactants, improves the yield of polyols, and has mild reaction conditions, realizes recovery and long-time use without deactivation of the catalyst, and reduces the utilization cost.

The present application relates to the technical field of seeding, in particular to a kind of air blowing seed disturbing type air suction type peanut seed metering method, comprising the following steps: seed enters seed chamber mechanism, the strain signal of corresponding detection area is collected by strain gauge, and the equivalent pile seed pressure response value of each detection area is constructed;The strength index, bias index and growth index of various piles are calculated;The target rotation angle of corresponding jet head is calculated, and the target jet frequency of corresponding jet head is calculated;The target rotation angle is converted into the rotation pulse number and rotation angle of corresponding motor, and the directional seed disturbing of jet head is driven to aim at corresponding seed pile position, so that seed is in suspended state;When seed suction mechanism carries peanut seed from negative pressure area to non-negative pressure area, peanut seed realizes seed dropping.This application detects the state of seed pile by strain gauge, realizes the automatic adjustment of jet head rotation angle and jet frequency, so that jet seed disturbing can actively aim at seed gathering area and implement directional disturbance, improve seed metering accuracy.

The invention relates to the field of hydrogenation catalysts, and discloses a preparation method of a hydrogenation catalyst, the hydrogenation catalyst and application thereof, and a production method of an aromatic extraction raw material. The invention relates to a preparation method of a hydrogenation catalyst, which comprises the following steps: (1) loading nickel and alkali metal and / or alkaline earth metal onto a carrier, and then roasting to obtain a modified carrier; (2) loading cobalt, molybdenum and a first organic matter on the modified carrier, and then carrying out hydrothermal treatment and first post-treatment to obtain a catalyst precursor; and (3) loading a second organic matter on the catalyst precursor, and then carrying out hydrogenolysis post-treatment to obtain the catalyst. According to the method, the loading sequence of the active metal is modulated, the stability of the catalyst is improved, the electronic characteristic adjusting effect of alkali metal is utilized, and organic matter is introduced while the active metal is subsequently impregnated, so that the active metal can be better dispersed on a carrier, and better combination between the active metal is realized.

This invention relates to the field of intestinal health regulation technology, and discloses a method for preparing and applying a composition containing *Anoectochilus roxburghii* (a type of orchid) to improve intestinal health. The composition, by weight, includes the following components: 8-25 parts of *Anoectochilus roxburghii* complex extract, 5-20 parts of fermented *Anoectochilus roxburghii* prebiotics, 20-60 parts of complex prebiotics, and 1-10 parts of pre-adapted probiotic powder. The *Anoectochilus roxburghii* complex extract is composed of *Anoectochilus roxburghii* polysaccharide fraction and *Anoectochilus roxburghii* alcohol extract composite fraction. The alcohol extract composite fraction is a complex formed by the alcohol extract of *Anoectochilus roxburghii* and phospholipids. The mass ratio of the alcohol extract composite fraction to the polysaccharide fraction is 1:(1-4). This invention overcomes the technical problems of low utilization rate of *Anoectochilus roxburghii* active ingredients, poor probiotic environmental tolerance, and limited dispersibility of active substances in existing intestinal health improvement products. This invention constructs a composite system that combines improved utilization of active ingredients, enhanced stability of live bacteria, and improved overall intestinal health improvement capabilities.

The present invention belongs to the technical field of fireproof materials, and specifically relates to a ceramic silicone rubber composite material and its preparation method and application. The raw material composition of the ceramic silicone rubber composite material includes a silicone rubber matrix, white carbon black, hydroxy silicone oil, flame retardant, expanded graphite, flux, ceramic filler and crosslinking agent. By introducing the expanded graphite functional additive, the expanded graphite of the composite material will remove oxygen-containing groups and generate gas after being overfired, causing the volume of the material to expand, thereby increasing the sealing extrusion force between the composite material and the sealing gap, improving the explosion-proof impact force of the ceramic silicone rubber, and effectively preventing the spread of flames and smoke; and the deoxidized expanded graphite has a regular molecular structure, so it has good thermal conductivity, can transfer heat to the flux and ceramic filler inside the material in time, which is conducive to reducing the ceramic temperature of the composite material, so that the ceramic structure is quickly formed inside the material, thereby improving the ceramic strength of the composite material.

The utility model belongs to papermaking technical field, concretely relates to an improved high -efficient double roll pulp washer, including pulp washing bin and with the support platform that connects with pulp washing bin, the side of pulp washing bin is installed with drive motor, and the output fixed with the first drive link of the rotary connection of pulp washing bin of drive motor, the outside fixed with the first spur gear of first drive link, the outside meshing connection has the second spur gear of first spur gear, the inside rotary connection has the cylinder of fixed connection with pulp washing bin of second spur gear, the outside of second spur gear is connected with third spur gear through the belt, and the inside fixed with the second drive link of rotary connection of pulp washing bin of third spur gear, the end of first drive link away from drive motor and located pulp washing bin inside installation has upper roll. The utility model reduces solid -liquid separation loss due to the nonuniformity of feeding through the pre -treatment of slurry, and promotes solid -liquid separation efficiency.

The application relates to the technical field of building waterproof materials, and particularly discloses a preparation method of a modified graphene polymer cement waterproof coating, which comprises the following steps: preparing a modified graphene composite regulator, dispersing and treating graphene oxide, carrying out interface modification on the graphene oxide by using 3-aminopropyl triethoxysilane, adding tetraethyl orthosilicate to construct a silicon-oxygen structure, then carrying out stabilization treatment on the silicon-oxygen structure by using polyvinylpyrrolidone to obtain the modified graphene composite regulator; mixing the modified graphene composite regulator, a polymer emulsion, a film-forming aid, a defoaming agent, a preservative and deionized water to obtain a liquid material component; mixing silicate cement, quartz powder, calcium carbonate and hydroxypropyl methyl cellulose to obtain a powder material component; and mixing the liquid material component and the powder material component to obtain the modified graphene polymer cement waterproof coating. The modified graphene composite regulator is prepared by carrying out composite modification on graphene oxide, and is applied to a polymer cement waterproof coating system.

The invention relates to a pipeline trenchless repair material and a repair construction process, and belongs to the technical field of pipeline trenchless repair, the raw materials comprise the following components by weight: functionalized epoxy acrylate resin, an initiator, silicon dioxide aluminum-doped composite microspheres, a dispersant and an antifoaming agent. The invention further discloses a trenchless construction process which comprises the following steps: Q1, preparing the lining pipe from the glass fiber cloth, the inner film, the outer film, the ultraviolet protective film and the pipeline trenchless repair material; q2, the inner wall of the damaged pipeline is cleaned and dried, then the lining pipe is dragged into the damaged pipeline, trimming, sealing and inflating are conducted according to the shape of the damaged position of the damaged pipeline, and the inner wall of the damaged pipeline is attached; q3, ultraviolet automatic control equipment is adopted for irradiating the inflated lining pipe so that the lining pipe can be polymerized and cured; and Q4, after polymerization and curing of the lining pipe in the step Q3 are completed, good detection is carried out. The material has the advantages of high strength, good toughness and high material stability.

The invention relates to the technical field of hydrogenation catalysts, and discloses a gasoline selective hydrogenation catalyst and a preparation method and application thereof. The preparation method of the gasoline selective hydrogenation catalyst comprises the following steps: (1) loading alkali metal and / or alkaline earth metal onto a carrier to obtain a modified carrier; (2) loading nickel, at least part of molybdenum and a first organic matter onto the modified carrier by adopting an impregnation method, and then carrying out carbonization treatment to obtain a carbonized product; (3) loading cobalt, at least part of molybdenum and a second organic matter onto the carbonized product by adopting an impregnation method, and then carrying out hydrothermal treatment and first post-treatment to obtain a catalyst precursor; and (4) loading a third organic matter on the catalyst precursor by adopting an impregnation method, and then carrying out hydrogenolysis post-treatment. The catalyst prepared by the method has good competition and selection among hydrodenitrogenation, olefin saturation and aromatic hydrocarbon hydrogenation, and the aromatic hydrocarbon selectivity and the stability of the catalyst are improved while deep denitrification is performed.

The invention relates to the technical field of polymer composite materials, in particular to a high-thermal-conductivity epoxy resin composite material and a preparation method thereof. The high-thermal-conductivity epoxy resin composite material is prepared from the following raw material components in parts by weight: 100 parts of epoxy resin, 10 to 50 parts of hexagonal boron nitride nanosheets (BNNS), 10 to 50 parts of hexagonal boron nitride sheets (BN), 3 to 5 parts of graphene hybrid boron nitride and 20 to 50 parts of a curing agent. The invention relates to an epoxy resin-based composite material with excellent heat-conducting property, which is prepared by taking a hexagonal boron nitride nanosheet (BNNS), a hexagonal boron nitride sheet (BN) and graphene hybridized boron nitride as mixed filler. The composite material disclosed by the invention can be widely applied to the fields requiring high heat-conducting property, such as electronic packaging, heat dissipation devices, aerospace and automobile industry, and is particularly suitable for manufacturing thermal interface materials (TIMs).

The invention provides optical glass, which comprises the following components in percentage by weight: 20 to 35 percent of P2O5; nb2O5: 37% to 55%; 1 to 12 percent of TiO2; 4% to 19% of BaO; and 0.5 to 14 percent of Na2O. Through reasonable component design, the optical glass provided by the invention does not contain components harmful to the environment, such as PbO, has high refraction and high dispersion performance, and meets the use of high-performance optical instruments.

This invention discloses a low-smoke halogen-free flame-retardant network cable and its preparation method, comprising a conductor, an insulation layer, a foamed filler strip, an aluminum-plastic composite film wrapping layer, a non-woven fabric wrapping layer, and a halogen-free flame-retardant outer sheath layer. The halogen-free flame-retardant sheath layer is prepared from the following components: ethylene-vinyl acetate copolymer, POE, pretreated magnesium hydroxide, ammonium polyphosphate, modified lignin, attapulgite, zinc borate, maleic anhydride-grafted ethylene-vinyl acetate copolymer, antioxidant, and calcium stearate. This low-smoke halogen-free flame-retardant network cable uses an EVA / POE blend as the sheath matrix and employs a ternary composite flame-retardant system of magnesium hydroxide, ammonium polyphosphate, and modified lignin, synergistically using zinc borate and attapulgite as functional additives. Without introducing halogens, the sheath material simultaneously possesses B1-level flame-retardant performance, low-smoke and low-toxicity characteristics, and transmission performance meeting the Category 6 network cable standard. The overall solution balances the requirements of flame-retardant safety and communication functionality.

This invention discloses a polymeric flame-retardant material and its preparation method, relating to the field of polymeric materials technology. In preparing the polymeric flame-retardant material, epichlorohydrin is used as a bridging agent to graft 2-(diphenylphosphino)ethylamine onto luteolin to obtain modified luteolin; polypropylene glycol, dimethylolpropionic acid, 1,4-butanediol, and isophorone diisocyanate are polymerized to obtain polyurethane; the polyurethane is reacted with methyl 4-aminocinnamate to obtain modified polyurethane; cerium dioxide is reacted sequentially with γ-glycidoxypropyltrimethoxysilane and 3-amino-1,2,4-triazole to obtain modified cerium dioxide; the modified polyurethane, modified luteolin, and modified cerium dioxide are mixed and kneaded to obtain the polymeric flame-retardant material. The polymeric flame-retardant material prepared by this invention exhibits superior flame retardancy and weather resistance.

The invention relates to a preparation method and application of proton exchange membrane electrolyzed water iridium-based catalyst coating slurry, and aims to improve the dispersity of an iridium-based catalyst in the slurry, enhance the combination effect of the surface of the catalyst and Nafion, reduce the repellency of each component in a mixed system, obviously improve the dispersion state of the slurry, and improve the stability of the slurry. And the flow spreading of the slurry on the coating substrate is more uniform, and a uniform and crack-free catalyst layer is obtained through coating. The technology is rapid, simple and convenient, small in required technical difficulty, capable of preparing the slurry on a large scale and suitable for batch production.

This invention relates to the field of biomedical technology, providing a microsphere composition and its preparation method, as well as its application in the preparation of contrast agents and drugs. The microsphere composition includes a microsphere dispersant and microsphere particles; the microsphere particles include a shell and a core; the shell comprises a lipid mixture consisting of charged lipids and auxiliary lipids; the core comprises an optional therapeutic gas, and one or both of an inert gas or inert liquid; the molar amount of charged lipids is ≤60% based on the total molar amount of the lipid mixture; the pH value of the microsphere dispersant is 5-6.9. The microsphere particles of this invention can efficiently load therapeutic gases and conventional drugs, precisely target their application, exhibit excellent stability, and have high biocompatibility.

The invention discloses a filter pressing treatment process for oily sludge, and belongs to the technical field of oil and gas field waste treatment. Comprising the following steps: feeding the oily sludge into a preheating tempering tank, adding alkyl glycoside and amorphous silicon powder, and carrying out gradient heating and stirring to obtain pretreated sludge; then feeding the pretreated sludge into a mixing reactor, adding a composite modified filter aid prepared from hydrophobic modified diatomite, quaternized modified chitosan, aminated modified graphene oxide and the like, and performing stirring-ultrasonic treatment to obtain demulsified sludge; feeding the demulsified sludge into a filter press which is pre-coated with a porous non-hydrophobized diatomite pre-coating layer and is provided with double-layer breathable gradient aperture filter cloth, and finally, performing low-pressure material distribution and gradient boosting filter pressing, and after filter pressing, introducing instantaneous high-pressure nitrogen to perform micro back-flushing and cake unloading, and purging the filter cloth to complete the operation. According to the process, an oil-water-silicon fine particle emulsification system can be effectively broken and removed, the problems of high-altitude low-temperature agglomeration and system microphase separation are relieved, graded interception and blockage prevention are realized, and the filter pressing efficiency and stability are improved.

The application relates to the technical field of alloy solder, and discloses a preparation method of photovoltaic solder strip alloy solder, specifically as follows: tin particles and copper particles are added into a crucible and placed in a resistance furnace to be smelted under a nitrogen atmosphere, and finally poured into a water-cooled casting mold to obtain a tin-copper solder; the prepared tin-copper solder is placed in a resistance furnace, heated and melted under a nitrogen atmosphere, nickel-cobalt-porous carbon-coated nano titanium dioxide is added, temperature refining is carried out, and finally the alloy solder is poured into a water-cooled casting mold to be prepared. The prepared nickel-cobalt-porous carbon-coated nano titanium dioxide is used as a reinforcing phase of the tin-copper alloy solder, the wetting performance and the mechanical performance of the solder are significantly improved, and the problem that high wettability and high strength cannot be considered together due to poor compatibility between a traditional inorganic nano reinforcing phase and a metal matrix is solved.

The invention discloses a method for preparing a noble metal catalyst based on a precipitation reduction method. The method comprises the following steps: preparing precipitation mixed slurry; preparing a reducing agent solution; under a water bath of 0-90 DEG C, dropwise adding a reducing agent solution into the precipitation mixed slurry, and stirring and reducing for 1-12 hours to obtain noble metal catalyst slurry; mixing the noble metal catalyst slurry with a binder, an acid solution, an auxiliary agent and a thickening agent, and stirring for 5-30 minutes to obtain coating slurry; spraying the coating slurry on the end surface of a ceramic or metal matrix for quantitative coating; and drying the substrate coated with the coating slurry, calcining, and curing the coating slurry on the substrate to obtain the noble metal catalyst. When the catalyst is applied, migration or precipitation of precious metal in the drying or pulping process and migration of precious metal in multi-precious-metal mixed slurry are avoided, and the dispersion state of active components used in a high-temperature environment is improved, so that the anti-aging performance of the catalyst is improved.

The invention belongs to the technical field of heat dissipation equipment, and particularly relates to a casting type heating radiator which comprises a plurality of heat dissipation pipes. A desilting unit is arranged at the water inlet end of one heat dissipation pipe at the water inlet end; the dredging unit comprises a three-way pipe fixedly connected to the water inlet end of the heat dissipation pipe. A feeding barrel is fixedly connected to a connector in the top side of the middle of the three-way pipe; a sealing cover is bolted to the top surface of the feeding barrel; grinding steel balls are arranged in the feeding barrel; when water flow passes through the three-way pipe, the grinding steel balls in the feeding barrel enter the three-way pipe, the water flow carries the grinding steel balls to penetrate through the heat dissipation pipe, the grinding steel balls collide with the inner wall of the heat dissipation pipe, scale and impurities attached to the inner wall of the heat dissipation pipe are broken, fall off and are discharged out of the heat dissipation pipe along with the water flow, and therefore cleaning work of the heat dissipation pipe is achieved. The heat dissipation effect of the heat dissipation pipe is ensured; moreover, the disassembly of the heating radiator is avoided, the cleaning difficulty is reduced, and the operation of common residents is facilitated.

The invention relates to the technical field of glass fiber dispersion, in particular to a glass fiber pre-dispersion device for long glass fiber reinforced thermoplastic production, which comprises an extrusion dispersion component, a stretching dispersion component, a shaping component, a dispersion detection module and a dispersion feedback module, the stretching and dispersing component is used for stretching the initial dispersed melt plastic to obtain first dispersed melt plastic, the shaping component is used for flattening and shaping the first dispersed melt plastic, and the dispersion detection module is used for detecting glass fiber distribution and analyzing whether pre-dispersion is abnormal or not. The dispersion feedback module is used for adjusting a pre-dispersion process according to a detection result; the dispersion state of long glass fibers in plastic is accurately controlled, uniform distribution is ensured, meanwhile, intelligent quality monitoring and feedback adjustment are achieved, and the production process is optimized, so that the mechanical property and impact resistance of the composite material are improved, and the glass fiber breakage risk is reduced.

The invention discloses a preparation method of special nano calcium carbonate for an acrylate adhesive, which comprises the following steps: S1, diluting lime milk to obtain lime milk raw slurry, introducing mixed gas containing carbon dioxide under a stirring condition to carry out carbonation reaction, stopping introducing gas after the reaction is finished, and aging to obtain calcium carbonate suspension; s2, carrying out surface modification treatment on the nano calcium carbonate suspension by using a compound of polyoxyethylene glycerol triricinoleate, nonylphenol polyoxyethylene ether sulfate and sodium stearate; s3, carrying out ultrasonic treatment on the nano calcium carbonate suspension subjected to primary modification, adding isocyanate propyl triethoxy silane, and carrying out secondary surface modification treatment; and S4, carrying out filter pressing, drying, crushing and sieving on the modified nano calcium carbonate slurry to obtain the modified nano calcium carbonate. According to the prepared nano calcium carbonate filled acrylate adhesive, the damp-heat aging resistance and thixotropy of the nano calcium carbonate filled acrylate adhesive can be improved, and the adhesiveness, durability, stability and the like of the acrylate adhesive are improved.