99results about How to "Improve long-term effect" patented technology

The invention relates to the technical field of electrical operation safety management, in particular to an artificial intelligence-based electrical operation misoperation prediction and correction system, which comprises a data acquisition module, a data processing module, a misoperation prediction module, a correction suggestion generation module, a real-time monitoring and feedback module, a self-learning module and a data storage module, operation data and environment data are collected in real time through a sensor network, the data are preprocessed, feature vectors are generated, a misoperation prediction model is constructed based on a long short-term memory network algorithm, the misoperation occurrence probability is predicted, a decision tree algorithm is adopted to generate correction suggestions, and prediction results and the correction suggestions are presented through a human-computer interaction interface. The self-learning module is used for dynamically optimizing the prediction model and the suggestion generation model; the data storage module is used for classifying and storing the operation data, the environment data and the prediction result; according to the invention, the misoperation is accurately predicted in real time, the intelligent correction suggestion is generated, and the safety and efficiency of electrical operation are remarkably improved.

The invention discloses an anti-aging asphalt-based material and a preparation method thereof, and belongs to the technical field of asphalt material preparation, and the anti-aging asphalt-based material comprises the following raw materials in parts by mass: 100 parts of matrix asphalt and 2-10 parts of an organized zirconium phosphate modifier. Zirconium phosphate is subjected to intercalation treatment through organic molecules, the interlayer spacing of the zirconium phosphate is enlarged, agglomeration of zirconium phosphate particles can be effectively avoided, the compatibility of the zirconium phosphate particles and asphalt is improved, and the ultraviolet absorption performance of the zirconium phosphate particles can be greatly improved; the ultraviolet aging resistance of the obtained modified asphalt can be further effectively improved.

The invention discloses core-shell type hydrophobic modified activated carbon and a preparation method thereof. The obtained hydrophobic activated carbon is composed of a core (activated carbon) and a shell (hydrophobic breathable silicon dioxide shell). The method comprises the following three steps: (1) constructing a silicon dioxide shell layer: dispersing pretreated activated carbon in a solvent, adding tetraethyl orthosilicate into the solvent, firstly adjusting the pH value of a reaction solution to be weakly acidic, stirring for 20-30 minutes under a certain stirring condition, then adjusting the pH value of the reaction solution to be weakly alkaline, continuously stirring for 0.5-1 hour to obtain a suspension A, and carrying out centrifugal drying treatment on the suspension A to obtain the silicon dioxide shell layer; an intermediate product coated with a hydrophilic silicon dioxide shell layer is obtained; (2) hydrophobic group grafting: dispersing the obtained intermediate product in a solvent, adding siloxane with different alkyl chain lengths into the solvent, fully stirring to obtain a suspension B, and performing centrifugal drying treatment to obtain hydrophobic modified activated carbon; cleaning and drying the hydrophobic modified activated carbon; and (3) adding a hydrophilic group: grafting the hydrophilic group on the silicon dioxide shell layer in an acid environment.

According to the antibacterial and antioxidant composite film applied to food preservation and the production method of the antibacterial and antioxidant composite film, the chlorogenic acid, the catechin, the montmorillonite and the zeolite are introduced, and a drying process is optimized, so that the antibacterial performance, the antioxidant performance and the mechanical performance of the preservative film are remarkably improved, and meanwhile, the water vapor permeability and the oxygen permeability are reduced. The method comprises the specific steps of raw material preparation, polyphenol compound and mineral substance preparation, membrane liquid preparation and treatment, drying process optimization and finished product membrane uncovering. According to the preparation method disclosed by the invention, components such as chlorogenic acid, catechin, montmorillonite and zeolite are introduced, and a drying process is optimized, so that the food preservative film with synergistic antibacterial and antioxidant properties is prepared.

The invention provides a water-dispersible reactive light stabilizer and a water-based polymer material. The water-dispersible reaction type light stabilizer comprises a first component, a second component and a third component, wherein the first component is a reaction type hindered amine light stabilizer and / or a reaction type ultraviolet light absorber; a second component: an emulsifier; the emulsifier is at least two nonionic surfactants, or simultaneously comprises at least one anionic surfactant and at least one nonionic surfactant; the anionic surfactant is a sulfonate type anionic surfactant or a phosphate salt anionic surfactant; an optional third component: a co-emulsifier; and when the first component contains the reactive ultraviolet light absorber, the water-dispersible reactive light stabilizer must contain the third component. The water-dispersible reactive light stabilizer provided by the invention can be dispersed in water in a stable form, so that the water-dispersible reactive light stabilizer can be stably added into a water-based high polymer material without adding a cosolvent, the environmental protection property of the water-based high polymer material is fully ensured, and the water-based high polymer material is free of VOC (Volatile Organic Compounds) harm.

The invention discloses a drug-loaded nanogel modified bioprosthetic valve as well as a preparation method and application thereof, and belongs to the technical field of preparation of medical materials and medical instruments. The preparation method comprises the following steps: firstly, synthesizing an active oxygen response monomer by taking thioketal-containing methacrylate and methylprednisone hemisuccinate as raw materials, then synthesizing active oxygen response type drug-loaded nanogel, and then introducing the active oxygen response type drug-loaded nanogel to the surface of the bioprosthetic valve through chemical bonding; in a pathological environment with relatively high active oxygen concentration, a thioketal group in the monomer is decomposed, and methylprednisone hemisuccinate is released at a fixed point, so that inflammatory cell infiltration is reduced, and the anti-inflammatory performance of the bioprosthetic valve is improved; in addition, the nanogel contains a large number of hydrophilic groups, a hydration layer is formed on the surface of the bioprosthetic valve, and the risk of thrombus and blood coagulation can be effectively reduced; the prepared bioprosthetic valve has excellent anti-inflammatory, anti-coagulation and anti-calcification capabilities and stability.

The invention discloses a high-strength geotextile and a preparation method thereof, and belongs to the technical field of geosynthetic materials, the high-strength geotextile comprises a polypropylene geotextile and a protective layer, and the preparation method of the high-strength geotextile comprises the following steps: soaking the polypropylene geotextile in titanium dioxide hybrid silica sol for dipping finishing for 30-40 min, and drying at 80 DEG C to constant weight to obtain the high-strength geotextile. The high-strength geotextile is obtained. In order to solve the problem of poorer aging resistance of polypropylene geotextile taking polypropylene as a raw material, titanium dioxide hybrid silica sol in the invention takes tetraethyl orthosilicate, long-chain alkyl silane, vanillin modified silane and tetrabutyl titanate as raw materials, and titanium dioxide and organic siloxane raw materials with different properties are introduced into a protective layer; the product strength, the acid and alkali / metal ion resistance, the ultraviolet radiation resistance and the like are improved, and the safety and the long-term effect of the product in a complex and harsh environment are enhanced.

The invention relates to a preparation method and application of a wall coating type enzyme-loaded microchannel reactor. The method comprises the following steps: mixing tetramethyl orthosilicate, methyltrimethoxysilane and methanol to obtain a solution A; deionized water, polyethylene glycol, a sodium fluoride aqueous solution and a dialyzed lipase solution are mixed to obtain a solution B, the solution B and the solution B are mixed for 3-10 minutes in an ice bath environment to obtain a solution C, the solution C is introduced into the pretreated microchannel through an injection pump, after incubation is conducted for 10-60 minutes, nitrogen is adopted for purging, redundant sol-gel is removed, and then the solution C is put into a drying oven to be dried; the catalyst is used for hydrolysis reaction of grease and various ester exchange and esterification reactions. The method can be carried out in a mild environment, and has higher conversion rate and shorter reaction time.

The invention discloses a treatment method for ballast railway expansive rock-soil roadbed frost boiling and mud pumping. The treatment method comprises the steps that foundation bed soil texture expansion potentials are graded according to clay component and content test data; calculating the average annual precipitation; investigating subgrade frost boiling degree, and performing statistical analysis to determine the basic characteristics of frost boiling; determining the drainage blocking degree; investigating rail surface abrasion, direction and height change conditions of the steel rail and triangular pits, and determining the state of the steel rail; according to a calculation result, performing grade division on the frost boiling and mud rising diseases; and according to the grade of the mud pumping disease, determining a corresponding toughness rapid-rising strength anti-seepage waterproof protective layer and a specific treatment scheme. According to the construction method of the foundation bed surface layer toughness rapid strength anti-seepage protection layer, the overall strength of the foundation bed surface layer is improved, the hydraulic connection between atmospheric precipitation and hydrophilic minerals of a rock-soil body of the foundation bed surface layer is blocked, a toughness water-resisting layer with certain strength is rapidly formed, and the construction method is suitable for rapid construction of an existing running railway line; and the disease is radically treated from the source of frost boiling and mud rising of the roadbed.

The invention belongs to the technical field of oil-gas field development, and provides a phase permeability improver, a fracturing fluid system containing the phase permeability improver, and preparation methods and applications of the phase permeability improver and the fracturing fluid system. The phase permeability improver is obtained by copolymerization and hydrolysis of acrylamide (AM), a functional monomer 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and cationic hydrophobic monomers A and B, the cationic hydrophobic monomer A is at least one of tetradecyl dimethyl allyl ammonium chloride, hexadecyl dimethyl allyl ammonium chloride and octadecyl dimethyl allyl ammonium chloride; the cationic hydrophobic monomer B is at least one of methacryloyloxyethyl trimethyl ammonium chloride, acryloyloxyethyl trimethyl ammonium chloride and acryloyloxyethyl dimethyl benzyl ammonium chloride; the phase permeability improver and the fracturing fluid system containing the phase permeability improver can obviously reduce the water phase permeability after fracturing construction, meanwhile, the influence on the oil phase permeability is small, the oil stabilizing and water controlling effects are obvious, and the low-permeability oil reservoir fracturing construction yield stabilizing effect can be obviously improved.

The invention relates to a biochar enhanced microbial mineralization improved compacted clay covering barrier layer and a construction method thereof.The barrier layer is prepared from a urease bacterium excitation solution, a calcium acetate solution, biochar and site in-situ soil, the total dry mass of all components in the urease bacterium excitation solution accounts for 4.5%-8.5% of the mass of the site in-situ soil, and the total dry mass of all components in the calcium acetate solution accounts for 4.5%-8.5% of the mass of the site in-situ soil. The dry mass of the solute of the calcium acetate solution accounts for 4.0%-10.0% of the mass of the site in-situ soil material, and the dry mass of the biochar accounts for 4.0%-8.0% of the dry mass of the site in-situ soil material. Compared with the prior art, the method has the advantages that site in-situ soil materials are treated through an in-situ excitation microbial mineralization method, the seepage reduction and gas barrier performance of a compacted clay covering barrier layer can be remarkably enhanced, and meanwhile, the binding force enhanced by mineralization among soil particles plays an important role in inhibiting water loss and cracking of a soil body.

The invention relates to a high-strength steel slag plate and a forming method thereof, and relates to the technical field of steel slag modification.The forming method of the high-strength steel slag plate comprises the following steps that a silicon supplement is added into steel slag powder and mixed to be uniform, a powder mixture is obtained, and the silicon supplement at least comprises any one of amorphous SiO2 powder or sinking bead powder; adding water into the powder mixture, and stirring to form a mortar mixture; and treating the mortar mixture to form the steel slag plate. The method has the effect of improving the compressive strength of the steel slag plate.

The invention relates to the technical field of biological fireproof forests, and discloses a design method for a biological fireproof barrier forest belt, which comprises the following steps of: 1, designing a biological fireproof forest belt based on the canopy density of 0.2-0.5 of a broadleaf mixed forest by taking the existing forest stand type as the broadleaf mixed forest, screening suitable fireproof tree species by integrating site conditions, natural environment and hydrothermal conditions of the biological fireproof forest belt of the broadleaf mixed forest; 2, cleaning and soil preparation are conducted on a biological fireproof forest belt to form a hole belt-shaped area, comprehensive complementary planting is conducted on fireproof tree species, the complementary planting density of a broad-leaf mixed forest is 2520 plants per kilometer as tree planting points, the fireproof tree species are planted in the hole belt-shaped area through the tree planting points, and the fireproof tree species are planted in the hole belt-shaped area; after planting, a compound fertilizer is used for topdressing, so that the fireproof tree seeds absorb fertility to accelerate the growth speed.

This invention discloses a crane safety operation control system and method based on machine vision and energy optimization management, belonging to the field of crane safety operation technology. Based on visual acquisition, this invention performs pre-operation benchmark calibration and dynamic data capture during operation, achieving full-cycle data traceability and synchronization based on timestamps. This clarifies the safety boundaries of the operation area and the initial state of the equipment, avoiding deviations and lags caused by data asynchrony, and ensuring the overall process is consistent and reliable. Visual data preprocessing eliminates external interference, and precise feature data is output using a safety benchmark model. Coupled with a tiered early warning mechanism, it accurately predicts operational anomalies and the risk of live intrusion and responds accordingly, achieving layered control of safety risks. By aligning visual data and operating parameters with timestamps to generate a fused dataset, and outputting safety levels and corresponding control signals through quantitative scoring, the objectivity and relevance of the assessment are improved, ensuring precise matching between control actions and safety states.

The present invention discloses a method for treating mud bubbling in ballasted railway expansive rock and soil roadbed, including grading the soil expansion potential of the subgrade according to clay composition and content test data; calculating the average annual precipitation; investigating the mud bubbling degree of the subgrade, and determining the basic characteristics of mud bubbling through statistical analysis; determining the degree of drainage blockage; investigating the wear, direction, height change and triangular pits of the rail surface, and determining the state of the rail; grading the mud bubbling disease according to the calculation results; and determining the corresponding tough and fast-strengthening anti-seepage waterproof protective layer and specific treatment plan according to the mud bubbling disease grade. The present invention improves the overall strength of the subgrade surface layer of the subgrade through a method for constructing a tough and fast-strengthening anti-seepage protective layer on the subgrade surface, blocks the hydraulic connection between atmospheric precipitation and the hydrophilic minerals of the subgrade surface rock and soil, and quickly forms a tough waterproof layer with a certain strength, which is suitable for the rapid construction of existing operating railway lines, and cures the mud bubbling disease from the source of the subgrade.

The invention discloses a high-temperature and high-humidity siloxane oligomer interface bonding agent composition and a preparation method thereof. The preparation method comprises: A: adding a siloxane wetting dispersant to a low molecular weight polyether, heating and stirring, adding an amino or mercapto / silicate copolymerized siloxane oligomer, and then adding high specific surface area inorganic nanoparticles to disperse uniformly to obtain a dispersion system; B: dropping a hyperbranched polysiloxane unit into the dispersion system of step A under stirring conditions, stirring and dispersing uniformly to obtain a hyperbranched polysiloxane unit composite dispersion system; C: adding an α-type active alkyl copolymerized siloxane oligomer to the dispersion system of step B, dispersing uniformly to obtain the high-temperature and high-humidity siloxane oligomer interface bonding agent composition. The preparation composition of the invention can enhance the high stability, high lifespan, high resistance to bulk damage, and high resistance to blistering of the polyether agent under high temperature and high humidity environments, and has low cost, and is easy for industrial production and popularization and application.

The utility model provides a gate hoist, which belongs to the technical field of hydraulic engineering hoist equipment and comprises a transverse frame, gate columns are fixedly connected to two ends of the bottom of the transverse frame, a groove is formed in the center of the transverse frame, and a lifting mechanism is mounted in the transverse frame. The lifting mechanism penetrates through the transverse frame and is fixedly connected with the two ends of the groove, and one end of the lifting mechanism is movably connected with a pull ring. Through matched use of the lifting mechanism and the pull ring, the situation that an existing gate hoist is connected with a threaded rod through a gate, and the threaded rod is connected with a motor to conduct lifting can be avoided; according to the gate hoist, the problem that the gate cannot be lifted due to the fact that the screw is prone to damage or rust after rotating for a long time is solved, the long-term effectiveness of the gate hoist is improved, the opening and closing degree of the gate can be effectively monitored and the position of the gate can be effectively known through cooperative use of the infrared distance meter and the gate position controller, and the accuracy of the gate hoist is improved.

The invention discloses an antistatic oil-resistant conveyor belt, which relates to the technical field of conveyor belts, and comprises a conveyor belt body arranged on a bottom plate, and a repairing mechanism arranged on the bottom plate and used for repairing an electrostatic coating and an oil-resistant anti-corrosion coating on the surface of the conveyor belt body after being scratched and rubbed, the repairing mechanism comprises a U-shaped plate arranged between the conveying belt body and the bottom plate, the bottom plate is provided with a moving assembly used for moving the U-shaped plate, a repairing box is arranged between the two opposite ends of the U-shaped plate, and a repairing roller is connected into the repairing box through a rotating shaft. According to the anti-static oil-resistant type conveying belt, through the arrangement of the repairing mechanism, the static coating and the oil-resistant anti-corrosion coating, damaged by scraping and friction, of the conveying belt body are repaired, and therefore the long-term effect of the oil corrosion resistance and the anti-static performance of the conveying belt body is improved.

The invention relates to the field of polyvinyl chloride materials, and particularly discloses a water mist resistant PVC plastic and a preparation method thereof. The PVC plastic comprises the following raw materials: 100 parts of polyvinyl chloride resin, 1-2 parts of a heat stabilizer, 0.5-2 parts of a lubricant, 2-4 parts of an antifogging agent and 1-2 parts of an antifogging aid, the raw materials of the antifogging aid comprise cyclodextrin, diisocyanate and polyol fatty acid ester in a molar ratio of 1: (5-12): (8-15), and the number of hydroxyl groups of the polyol fatty acid ester is 1. The PVC plastic provided by the invention has excellent long-acting water mist resistance. The transparency of the PVC product in a high-humidity environment can be guaranteed.

The present invention belongs to the technical field of tunnel lining repair, and specifically relates to an active and passive integrated repair mortar for leaking tunnel lining and a construction process. The active and passive integrated repair mortar for leaking tunnel lining of the present invention comprises a microbial slurry, a cementing solution and a self-repairing capsule; the components of the microbial slurry include urease bacteria and nutrients; the components of the cementing solution include urea and a first calcium salt; the self-repairing capsule is a core-shell structure, having an inner core and an outer shell, the components of the inner core include polyethylene glycol, urease bacteria spores and an activator, the components of the outer shell include epoxy resin and sodium alginate; the components of the activator include yeast extract, urea, a second nitrogen source and a second calcium salt. The construction process of the active and passive integrated repair mortar for leaking tunnel lining of the present invention is simple and easy, and can effectively reduce the leakage of cracks in tunnel lining.

The present invention provides a single crystal furnace thermal field insulation effect detection system based on thermal image analysis. Compared with the prior art, the present invention also includes a first thermal imager for monitoring the thermal distribution of the furnace side wall and generating thermal images, a second thermal imager for monitoring the thermal distribution of the furnace bottom and generating thermal images, a third thermal imager for monitoring the thermal distribution of the furnace top and generating thermal images, a cooling module for at least high temperature protection of the second thermal imager, a processing module for processing the image of the thermal distribution monitoring and imaging of the thermal imager, an evaluation module for evaluating the thermal field insulation effect of the single crystal furnace based on the image processed by the processing module, and an alarm module for triggering an alarm when the evaluation module determines that the thermal insulation effect of the single crystal furnace is lower than the expected thermal insulation effect. The present invention adopts multi-parameter comprehensive analysis and dynamic adaptive adjustment to greatly improve the accuracy, flexibility and industrial application value of monitoring the thermal field insulation performance of the single crystal furnace.

The utility model relates to the technical field of anti-corrosion protective films for metal products, and provides an anti-corrosion protective film for metal products, which comprises a metal product body shell, and a composite protective film layer is arranged on the outer surface of the metal product body shell. The composite protective film layer specifically comprises an inner side protective layer distributed on the surface of a shell of the metal product body, an adhesion layer is arranged on the outer side of the inner side protective layer, an isolation layer is arranged on the outer side of the adhesion layer, a reinforcing layer is arranged on the outer side of the isolation layer, and an outer side protective layer is arranged on the outer side of the reinforcing layer. The anti-corrosion protective film for the metal product not only has an excellent anti-corrosion effect, but also has excellent fitting property, air tightness, mechanical strength, weather resistance, long-term effect and the like, and provides all-around guarantee for protection of the metal product.

The invention relates to the technical field of mine restoration, and provides mine soil ecological restoration equipment which comprises a side slope, a reinforcing hard net installed on the side slope and a plurality of planting grids arranged on the reinforcing hard net in an array mode, positioning ladder holes are formed in cross joints of the planting grids, and anchoring insertion cylinders are installed in the positioning ladder holes; a surface repairing layer is arranged on the planting grids; an inner expansion repairing assembly is arranged in the anchoring inserting cylinder, and a leakage guiding assembly is arranged at the bottom of the anchoring inserting cylinder. The internal expansion repairing assembly comprises a honeycomb repairing column arranged in the anchoring inserting barrel and a moisture uniformizing disc located at the top end of the honeycomb repairing column and fixedly connected to the upper side of the interior of the anchoring inserting barrel, and a water permeable hole core column is installed at the top of the moisture uniformizing disc. When the device is used, through gridding arrangement of the reinforcing hard net and the anchoring insertion barrels, the surface repairing layer and the internal expansion repairing assembly are cooperatively integrated, and a three-dimensional repairing network with point-surface linkage and internal and external linkage is formed.

The invention relates to a foam type organochlorine disinfectant as well as a preparation method and application thereof, and belongs to the technical field of disinfectants. Magnesium sulfate is modified by polysilicic acid, so that a stable wrapping system is formed between the modified magnesium sulfate and organochlorine, and the stability and long-term effectiveness of an effective chlorine component in the using process are greatly improved; meanwhile, a synergistic effect between the surfactant and sodium dimethylbenzene sulfonate is introduced to construct an additional protection layer, so that the overall stability of the organochlorine disinfectant is further reinforced, and possible harmful contact of the organochlorine disinfectant under complex or bad environmental conditions is blocked; performance reduction or potential hazards caused by environmental factors are effectively prevented, and safe and efficient use of the disinfectant is ensured. According to the foam type organochlorine disinfectant, a double wrapping system is utilized, the long-term effect and stability of the disinfection effect are improved, and the environmental adaptability and use safety of the product are remarkably enhanced.

This invention provides a flame-retardant, high-transmittance, and weather-resistant composite material for LED lampshades and its preparation method. By weight, the raw materials include: 80-95 parts bisphenol A type polycarbonate, 4-10 parts phenyl-containing polysiloxane microspheres, 1-4 parts mesoporous silica phosphorus-loaded microspheres, 0.3-0.8 parts silane coupling agent, 0.3-0.8 parts flame retardant, 2-5 parts organic nano-montmorillonite, 0.2-0.6 parts polycarbodiimide, 0.3-0.8 parts antioxidant, 0.3-0.7 parts light stabilizer, and 0.3-1.0 parts lubricant. The flame-retardant, high-transmittance, and weather-resistant composite material for LED lampshades provided by this invention possesses comprehensive properties of high light transmittance, high toughness, and heat resistance.

The invention relates to the technical field of corrosion inhibition, in particular to a composite corrosion inhibitor for an oil field pipeline and a preparation method of the composite corrosion inhibitor, and the composite corrosion inhibitor comprises an N-thiourea acetyl-ethoxylation modified imidazoline intermediate, a 2-pyridylaldehyde-diphenylamine-4-sodium sulfonate condensate, sodium cyanoboride and methanol. The preparation method comprises the following steps: carrying out cyclization, ethoxylation and thiourea acetylation on fatty acid and polyamine to prepare an N-thiourea acetyl-ethoxylation modified imidazoline intermediate, and dissolving the N-thiourea acetyl-ethoxylation modified imidazoline intermediate, 2-pyridylaldehyde, a diphenylamine-4-sodium sulfonate condensate and sodium cyanoboride in methanol according to a specific mass ratio to form the composite corrosion inhibitor. The technical problem that an oil field pipeline is poor in corrosion protection effect in a high-temperature, high-pressure, high-salinity and CO2 / H2S coexistence environment is solved, and synergistic and efficient corrosion prevention of multiple active components is achieved.

The invention relates to the technical field of soil improvement, and discloses a fiber sponge meson soil improvement base material which is composed of flocculent fibers, a plant nutrient material and a pH value regulator, the volume water absorption rate of the flocculent fibers is larger than or equal to 88%, the permeability is larger than or equal to 7 mm / s, and the acidity coefficient is larger than or equal to 2.0; and reasonable blending can be performed in different regions and different soil types. By applying theories of soil science, biology, ecology and the like, the water retention and fertilizer retention capabilities of original soil are effectively improved, the air permeability and the water permeability are improved, the soil hardening phenomenon is remarkably relieved, the original soil is mixed according to the proportion, outward transportation and back supplement of the soil are reduced, the construction efficiency is improved, and the cost of loading, unloading, transportation and other links is reduced; meanwhile, the burden of construction on the environment is reduced, the improved base material can effectively improve the water management capacity of the sunken greenbelt and the bioretention facility, the phenomenon that accumulated water becomes black and odorous water after raining is reduced, the sponge city construction standard is met, and the manual maintenance requirement and the water resource consumption are reduced.

The invention relates to the technical field of mortar preparation, in particular to high-performance waterproof dry-mixed mortar and a preparation method thereof. The high-performance waterproof dry-mixed mortar is prepared from the following raw materials in parts by weight: 300 to 400 parts of cement, 550 to 650 parts of quartz sand, 1.5 to 3.0 parts of silane waterproof agent, 15 to 25 parts of hydrophobic redispersible latex powder, 0.2 to 0.5 part of water-retaining thickening agent, 0.5 to 1.5 parts of polycarboxylic acid water reducing agent, 3 to 8 parts of thixotropic lubricant, 0.3 to 1 part of coagulation accelerator, 20 to 50 parts of superfine filler and 0.5 to 1.5 parts of polypropylene fiber. The technical problem of non-uniform dispersion of trace components in high-performance mortar production is solved through the process combination of premixing the water-retaining thickening agent, the polycarboxylate superplasticizer, the thixotropic lubricant and the coagulant and then performing staged low-speed main mixing on the mixture and other raw materials; the effects of excellent waterproof and anti-seepage performance, excellent mechanical property and bonding strength, excellent crack resistance and high durability are achieved.

The invention relates to a waterproof coating for a loess silt dam and a preparation method of the waterproof coating, the waterproof coating comprises the following components in parts by weight: 1.2-2.4 parts of polyvinyl butyral, 60-70 parts of alkoxy silane, 28.2-38.4 parts of a solvent and 0.05-0.1 part of a catalyst, and the waterproof coating forms a hydrophobic coating with a compact structure on the surface of loess. The loess has excellent water resistance, wear resistance, scouring resistance and long-term effect, so that the stability and safety of engineering are ensured.

The invention discloses a preparation method of a positive electrode material, the positive electrode material and a lithium-sulfur battery, and the preparation method of the positive electrode material comprises the following steps: pretreating a carbon nanotube to obtain an open carbon nanotube; the method comprises the following steps: putting an open carbon nanotube into a container, and vacuumizing the container until the vacuum degree is 0.05-0.1 Pa; keeping the vacuum degree, and injecting a metal catalyst solution into the container to soak the open carbon nanotubes to obtain a precursor mixture; the precursor mixture is dried and subjected to heat treatment, the metal catalyst is converted into metal particles, the opening carbon nanotubes are filled with the metal particles, and a carbon nanotube composite material is obtained; and adding sulfur into the carbon nanotube composite material, grinding and heating to obtain the positive electrode material. According to the present invention, the metal catalyst is efficiently coated with the carbon nano-tube through the negative pressure liquid phase method, such that the catalytic activity and the stability of the catalyst are improved, the shuttle effect in the lithium-sulfur battery is reduced, and the long-term effect and the stability of the positive electrode material are improved.