121results about How to "Improve physics" patented technology

The invention provides a cement particle grading optimization method and system for minimizing porosity, and relates to the technical field of cement material science and engineering, and the method comprises the following steps: obtaining cement particles with different particle size distributions; taking the cement particles as spheres, and generating a sphere set according to the cement particles with different particle size distribution; in the sphere set of each particle size distribution, sampling according to a proportion, and constructing a three-dimensional simulation microstructure model by using the sampled spheres; simulating a sphere accumulation process in a three-dimensional box by using a three-dimensional simulation microstructure model, calculating the porosity in the three-dimensional box in the simulation process, establishing a loss function according to the overlapping volume between spheres and the collision volume between the spheres and the boundary, and obtaining the porosity of cement proportions with different particle size distributions by using a gradient descent method; and adjusting the sampling proportion of each particle size distribution by adopting an optimization algorithm so as to minimize a loss function and realize the grain composition of the cement powder with the minimum porosity and different distribution so as to optimize the strength of the cement.

The invention relates to a preparation method of paper, in particular to a preparation method of breathable paper applied to a packaging material. Chitosan and oxidized sodium alginate are subjected to a Schiff base reaction, so that a more open and loose coating layer is formed on the fiber surface, gas circulation is facilitated, and the air permeability of the paper is improved to a certain extent. And a covalent bond formed by Schiff base reaction enhances the binding force between chitosan and oxidized sodium alginate, so that the coating layer is more firmly attached to the surface of wood pulp fiber. The enhanced binding force is favorable for improving the mechanical properties such as tensile strength and breakage resistance of the paper, and an imine bond generated by the Schiff base reaction has higher chemical stability and can resist the influence of changes of external environments such as humidity, temperature and the like on the coating layer, so that the long-term stability of the performance of the paper is kept.

The invention relates to the technical field of machine tool intelligent machining, and discloses a machining method based on deep learning and multi-sensor fusion, which comprises the following steps: collecting data in the machining process of a numerical control machine tool, and preprocessing the data in the machining process of the numerical control machine tool to obtain a data set; inputting the obtained data set corresponding to the data acquired by the plurality of sensors into a Kalman filtering algorithm for Kalman recursive filtering processing to obtain fused actual observation data acquired by the sensors; inputting a data set corresponding to the fused actual observation data acquired by the sensor and the data acquired by the numerical control system into a depth Q network algorithm, and predicting to obtain an optimal tool path; a magnetic field is applied to the machined workpiece through the excitation module; and machining a machined workpiece model along the optimal tool path by adopting an ultrasonic tool high-frequency machining method. According to the invention, the surface quality of the to-be-processed workpiece can be obviously improved.

The invention discloses an intelligent port comprehensive management system based on big data, and relates to the technical field of port energy management, and the system comprises a data collection and integration module which is used for deploying a plurality of sensors in each key region of a port, and a data collection device which is used for collecting the data of the ship position, the cargo flow, the device state and the environmental condition in real time, and through real-time data collection and integration, management personnel can quickly know the operation condition of the port. The intelligent port comprehensive management system based on big data has the advantages of real-time data collection and integration, intelligent scheduling and operation optimization, and the system can quickly respond to port operation requirements and adjust resource configuration and operation strategies in real time, so that the waiting time of ships and cargoes is shortened, the loading and unloading operation and prediction analysis are optimized, and the management efficiency is improved. The resource utilization rate and the efficiency of the operation process are remarkably improved, and managers can make decisions more accurately according to the data analysis result, so that the operation cost is reduced, and the customer satisfaction is improved.

The invention relates to a preparation device for a fly ash-based polymer regenerated roadbed, and aims to solve the technical problem of low preparation efficiency of the current fly ash-based polymer regenerated roadbed. The preparation device comprises a base, an impact crusher is arranged at the top end of the base, a feeding box is arranged at the top end of the impact crusher, and fly ash raw materials are fed from the feeding box; the method comprises the following steps: crushing fly ash to a required particle size range, putting the fly ash into a screening mechanism through a connecting box, screening the crushed fly ash, removing oversized or undersized particles, ensuring the particle size uniformity of the fly ash, mixing and stirring the pretreated fly ash and an exciting agent through a mixing and stirring mechanism, and enabling the fly ash and the exciting agent to fully react to form a geopolymer. Finally, the geopolymer material is made into a regenerated roadbed material through the extrusion forming mechanism, the regenerated roadbed material is output through the belt conveyor, fly ash is converted into the high-performance geopolymer material, the preparation efficiency is greatly improved, and powerful support is provided for construction of a regenerated roadbed.

The invention provides a preparation method of spherical iron phosphate, and relates to the technical field of lithium ion batteries, and the preparation method comprises the following steps: S1, one-step reaction: carrying out parallel flow on an iron salt solution, a phosphorus salt solution and ammonia water according to a molar ratio of 1: (0.8-1.2): (0.8-1.1) to generate amorphous iron phosphate slurry; adding ammonia water into the iron phosphate slurry to adjust the pH value to 1.5-2.5; s2, membrane washing; s3, a second-step reaction: adding pure water into the washed iron phosphate slurry, adjusting the iron concentration to 0.5-1.2 mol / L, adding a phosphoric acid solution, heating to 90-120 DEG C, and controlling the heat preservation time for 30-90 minutes after the material is converted into a white material, so as to obtain white slurry; s4, washing: taking a filter cake; s5, drying: generating iron phosphate dihydrate; s6, calcining: spherical iron phosphate is generated, and the iron phosphate is successfully converted from a traditional olive type, peanut type or honeycomb type to a spherical type through the preparation method provided by the invention.

The invention provides a preparation process of a soil remediation agent with multiple elements, and relates to the technical field of soil remediation. The preparation process of the soil remediation agent with the multiple elements comprises the following steps: selecting and grinding raw materials, namely selecting natural mineral raw materials containing silicon, calcium, magnesium and potassium elements, and grinding the selected raw materials to obtain powder with the particle size within a certain range, and the particle size is generally controlled between 100 meshes and 300 meshes; the organic matter is added, the content of the organic matter in the soil can be increased, the ground mineral powder and the organic matter are mixed according to a certain proportion, and the mixing proportion needs to be determined according to the specific requirements of soil remediation and the characteristics of raw materials. By combining silicon, calcium, magnesium, potassium and other elements, the remediation agent can meet the requirements of multiple nutrient elements in soil at the same time, promote plant growth and improve the soil structure, and by adding organic matter such as humic acid, the organic matter content of the soil can be increased, the water and fertilizer retention capacity of the soil can be enhanced, and the physical and chemical properties of the soil can be improved.

The invention discloses a process for preparing a liquid fertilizer from a lysine fermentation waste liquid, and relates to the technical field of fertilizer preparation, and the process has the advantages that a specific metal organic framework (MOFs) derived porous carbon material is adopted as an adsorption material to realize efficient purification of lysine in the lysine fermentation waste liquid, the porous carbon material obtained after ZIF-8 is subjected to carbonization and other treatment has a high specific surface area and a rich pore structure, a large number of sites are provided for adsorption of lysine, amino is introduced through ammonia gas plasma treatment and can form hydrogen bonds or electrostatic interaction with carboxyl of lysine and the like, carboxyl is introduced through oxygen plasma treatment, and the adsorption efficiency of lysine is improved. By means of the precise design, lysine is effectively separated from other impurities, a high-purity lysine resource is obtained, the content and quality of effective components in subsequent liquid fertilizer can be improved, and meanwhile the comprehensive utilization efficiency and economic benefits of the resource are greatly improved.

The invention discloses a direct coal liquefaction residue solvent extraction deliming method, refined asphalt and application, and relates to the technical field of solid waste resource treatment. According to the method, process conditions and process parameters are reasonably controlled, the thermal dissolution effect of an extraction agent and the liquefied residues is improved, a scale inhibitor composed of a multi-element alkyl organic matter, an auxiliary and coking washing oil is mixed with the extraction agent, then the ground liquefied residues are added into a material obtained through mixing, and the extraction agent and the liquefied residues are mixed uniformly. The slurry is prepared by controlling the stirring speed, the reaction temperature and the like; due to the addition of the scale inhibitor, the concentration of the residue extraction liquid is improved, and the treatment capacity and efficiency are enhanced; and a filter used for precision filtration adopts a stainless steel metal sintered filter element, so that the filter is resistant to higher temperature and pressure, the service life can be prolonged, and the stripping of viscous materials such as asphaltene in the liquefied residues is facilitated. The ultralow-ash refined asphalt prepared by the method can be used as a high-quality raw material of a high-end carbon material.

The invention relates to a method for preparing artistic concrete by taking broken glass as a main raw material, which comprises the following steps of: a) treating the broken glass: cleaning recycled waste glass, and removing non-glass impurities by adopting a mechanical screening and water washing combined method; b) burdening and mixing: mixing the crushed glass slag with cement and fine sand according to a mass ratio; c) mixing and forming: putting all the materials into a concrete mixer with a speed-adjustable function, and fully stirring until the materials are uniform; then pouring the mixed concrete slurry into a pre-designed mold; and d) curing and demolding: primarily curing the poured concrete in a mold. The recycled waste glass is reasonably treated and proportioned, so that the physical and chemical properties of the concrete are enhanced, and a concrete product is more durable and stable when being used outdoors.

The invention relates to the technical field of thermal insulation materials, in particular to a ceramic gel phase change energy storage self-thermal insulation structure and a preparation method thereof.Silicon dioxide sol and zirconium dioxide sol are mixed and then added with paraffin to prepare a phase change material, and the phase change material has the effects of enhancing the heat conduction performance and improving energy storage; the silicon dioxide and the zirconium dioxide both have good heat conduction performance, the heat conduction efficiency of the paraffin serving as the phase change material can be remarkably improved by mixing the silicon dioxide and the zirconium dioxide with the paraffin, heat can be transmitted and distributed in an energy storage structure more quickly, and the porous structure with high porosity serves as a carrier to bear the phase change material; the uniform distribution of heat can be facilitated, so that the heat-conducting property of the energy storage structure is further enhanced; the carbon fibers and the steel fibers are dispersed in the polyvinyl chloride to improve the strength of the polyvinyl chloride, and then the surface of the ceramic gel structure is coated with the polyvinyl chloride to package the phase-change material in the porous ceramic, so that the situation of leakage or performance degradation of the phase-change material is prevented to a certain extent.

The invention relates to a silk fibroin hard material, a preparation method and application, and the preparation method comprises the following steps: carrying out bubble removal treatment on a solution containing regenerated silk fibroin to obtain a high-purity silk fibroin solution or a silk fibroin / gelatin composite solution; and performing gel treatment on the high-purity silk fibroin solution or the silk fibroin / gelatin composite solution to obtain the silk fibroin hard material. The method has the advantages that the prepared silk fibroin solution has extremely high purity through the steps of fine degumming, washing, dissolving, dialysis and concentration and the treatment of centrifugal bubble removal.

The invention belongs to the technical field of high polymer materials, and particularly relates to a graphene nano composite material and a preparation method thereof. The graphene nano composite material is prepared from the following components: graphite powder, APTES (Aminopropyltriethoxysilane), polyvinyl alcohol, nano TiO2, polyethylene glycol dihydric alcohol, trimethylolpropane and isocyanate. The specific preparation steps of the graphene nano composite material are as follows: S1: preparation of graphene oxide; s2, introducing an amino silane group into the graphene oxide; s3, grafting polyvinyl alcohol and nano titanium dioxide; s4, carrying out in-situ polymerization grafting on the modified graphene oxide and polyurethane polyol to obtain a graphene nano composite material; according to the preparation method, the dispersity of graphene in a polyurethane matrix is enhanced through APTES functionalization and PVA grafting, and agglomeration is prevented; the APTES and the polyurethane form a covalent bond, so that the interface bonding is enhanced; pVA increases steric hindrance and improves toughness; tiO2 nanoparticles are stably dispersed, so that the impact resistance and the tensile strength are improved.

The invention discloses a PVDF emulsion demulsification washing process, and relates to the technical field of polymer modified materials. The process aims at effectively removing the residual additive in the polyvinylidene fluoride emulsion so as to improve the purity and the performance of the final product. The process comprises the following steps: firstly, mixing PVDF emulsion with a pre-prepared nano demulsifier, and conveying the mixture to a condensation tower through a screw pump; in the condensation tower, demulsifying the mixed solution at a set temperature, and mechanically stirring by adopting a frame type stirrer to promote the emulsion to be demulsified and form snowflake-shaped particles; and then, the demulsified material is discharged from the bottom of the condensation tower and enters a washing tower, and the residual auxiliary agent is removed by using deionized water in a countercurrent washing manner. And finally, dehydrating and drying the washed material. The method has the advantages that the demulsification and washing processes are optimized, so that the production efficiency is improved, the resource consumption is reduced, and meanwhile, the high purity and excellent performance of the PVDF product are ensured.

The invention belongs to the technical field of metal packaging tin making, and discloses a laminated iron product prepared from full-solid-content electron beam curing glue. The product comprises the following components in parts by weight: 50-90 parts of polybutadiene polyurethane acrylate, 3-25 parts of organic silicon polyurethane acrylate, 0.1-1.5 parts of an auxiliary agent and 5-15 parts of a polyfunctional group acrylate diluent. The specific preparation method of the product comprises the following steps: S1, preparing process aspect; s2, a coating link; s3, fitting characteristics; s4, curing mode; s5, performance expression; and S6, controlling bond fracture and new bond generation under electron beam irradiation. By the adoption of the full-solid-content gluing technology, the coating is a single-component product, easy and convenient to operate, non-toxic, safe, capable of being coated at the normal temperature or heated to 60 DEG C, free of VOC emission in the whole process, environmentally friendly, capable of saving energy, capable of bringing brand new development opportunities to related industries, representative of a novel curing technology, wide in prospect and worthy of being widely applied.

The invention discloses a preparation method of a metal surface nano coating for metal processing, which comprises the following steps: S1, carrying out laser processing on the surface of a metal piece to form a plurality of micron-sized elliptical hole structures; s2, the surface of the porous structure metal part is coated with a microcapsule filler; s3, after the microcapsule filler is dried, a nano coating solution is applied, and the drying time is 0.5-1 h; s4, the coated metal part is subjected to heating treatment, so that the microcapsules are broken, and inclusions are released to fill the porous structure; s5, the metal part is cooled, the cooling time ranges from 1 h to 2 h, and the filling layer is solidified; the microcapsule filler enhances the adhesive force between the surface of the metal part and the nano coating, after the porous structure formed by laser processing on the surface of the metal part is filled with the microcapsule filler, microcapsules are broken in the heating treatment process and release inclusions, the porous structure is filled with the microcapsules, micro unevenness on the metal surface is filled and leveled up, and the surface of the metal part is coated with the nano coating. And the nano coating can be attached to the surface of the metal piece more tightly.

The invention provides a silicone rubber material, a preparation method thereof and a cable. The silicone rubber material comprises the following components in percentage by mass: 67.09 to 90.28 percent of polysiloxane; 3.86% to 11.35% of an initiator; 3.84% to 12.38% of a repairing agent; 2.02 to 9.18% of a catalyst; the initiator is included in the first microcapsule, the repairing agent is included in the second microcapsule, and the catalyst is included in the first microcapsule or the second microcapsule. When the silicone rubber material is damaged and cracks are generated, the shells of the first microcapsule and the second microcapsule are broken, the initiator, the repairing agent and the catalyst are released due to siphoning, the initiator and the repairing agent are subjected to chemical reaction under the action of the catalyst, new polysiloxane rubber is generated at the damaged crack, and the silicone rubber material is repaired. Therefore, the damaged crack structure is repaired in time, and the mechanical properties, physical properties and the like of the silicone rubber material are repaired to a certain extent. In addition, due to the addition of the first microcapsules and the second microcapsules, the silicone rubber material is reinforced and toughened, and the physical and mechanical properties of the silicone rubber material are improved.

The invention discloses a liquid fertilizer formula prepared by compounding a tylosin finished product liquid and other components, and relates to the technical field of fertilizer preparation, and the liquid fertilizer formula comprises the steps of special pretreatment of tylosin, auxiliary compounding, nutrient substance addition and quality detection post-treatment. Certain carbon-carbon bonds, carbon-hydrogen bonds and other chemical bonds in tylosin molecules and byproducts thereof can be broken and recombined under bombardment of active particles, more functional groups with high activity are generated, the biological activity of the finished tylosin liquid can be enhanced, the finished tylosin liquid can be more easily compounded with other components in the subsequent process, and the stability of the finished tylosin liquid is improved. A stable compound with better synergy is formed by means of chemical bonding, hydrogen bonding and the like, ultrasonic waves are uniformly spread in a supercritical carbon dioxide medium, generated high-frequency vibration, cavitation effect and the like act on all the components, and the agglomeration phenomenon possibly existing among the components is further broken.

The invention discloses a reverse osmosis membrane assembly which comprises a reverse osmosis core and sealing covers mounted at two ends of the reverse osmosis core in a sealing manner, the reverse osmosis core comprises a middle inner membrane supporting layer as well as two groups of micro-filtration membranes and two groups of ultra-filtration membranes which wrap the outer side of the inner membrane supporting layer, a laminated pre-filtration layer is arranged between the micro-filtration membranes and the ultra-filtration membranes wrapping the inner membrane supporting layer, a PA reverse osmosis membrane wraps the rear parts of the micro-filtration membranes and the ultra-filtration membranes, and a separation net is arranged behind the PA reverse osmosis membrane; due to the synergistic effect of the multiple layers of membranes, the system can treat a more complex and worse seawater environment, and the stability and reliability of the effluent quality are ensured; due to the design of the laminated pre-filtering layer and the separation net, pollutants are effectively prevented from being in direct contact with the membrane holes and blocking the membrane holes, and the stability of the membrane assembly is further enhanced. Due to the introduction of the automatic backwashing device, the automatic backwashing device can be automatically started at regular intervals or according to a water quality monitoring result, the pre-filter is subjected to backwashing, the service life of the pre-filter is prolonged, and the maintenance cost is reduced.

The invention discloses a method for recycling an environment-friendly lithium ion battery adhesive, which comprises the following steps of: firstly, crushing a waste lithium battery cell, and heating and stirring by using an organic solvent such as N, N-dimethylformamide (DMF) or dimethyl sulfoxide (DMSO) at a specific temperature to efficiently dissolve and separate out a high-purity PVDF (Polyvinylidene Fluoride) solution; then, mixing soft water, an emulsifier, maleic acid and hydroxyethyl acrylate to prepare an emulsion, mixing the emulsion with the modified sodium alginate solution, and further uniformly stirring with the PVDF solution; and adding an initiator, heating and stirring to form stable gel, and finally cooling to prepare the high-performance adhesive. According to the method, efficient recovery of PVDF in the waste lithium battery is achieved, the film forming strength, heat resistance, chemical corrosion resistance and mechanical strength of the adhesive are remarkably improved through chemical modification, and a high-performance and environment-friendly adhesive solution is provided for manufacturing of the lithium ion battery; in addition, the method reduces environmental pollution and reduces resource consumption.

The invention belongs to the technical field of foam materials, and particularly relates to a pressure-resistant anti-aging composite foam box and a manufacturing method thereof. The method comprises the following steps: S1, preparing raw materials containing polypropylene and modified polypropylene; s2, mixing the raw materials, and performing melt blending granulation to obtain a modified polypropylene composite material; s3, the modified polypropylene composite material is fed into a hopper of a microcellular foaming injection molding machine to be preheated to be in a plasticized state, and then supercritical carbon dioxide is injected to serve as a foaming agent; s4, the polymer melt containing the supercritical carbon dioxide is injected into a cavity of the box forming mold with the preset temperature for pressure maintaining; the volume of a mold cavity is increased by controlling a mold core on one side of the movable mold to retreat, so that the pressure in the polymer melt is reduced, a foaming body is formed, and the target polypropylene composite foam box body is obtained after cooling and curing. The pressure-resistant anti-aging composite foam box prepared by the method disclosed by the invention has excellent buffering property, pressure resistance, aging resistance and environmental protection property.

The invention discloses a preparation technology of heat dissipation type satin cloth, and belongs to the field of satin cloth preparation, and the satin cloth is prepared from the following components by mass: 60-80 parts of polyester fiber; 6-8 parts of nitrile rubber; 5-8 parts of nano calcium carbonate; 10 to 16 parts of graphene oxide powder; 5 to 8 parts of silicon dioxide; 2-5 parts of protective wax; 1-3 parts of an anti-aging agent; and 2-6 parts of a plasticizer. According to the heat dissipation type satin fabric, the polyester fibers and the nitrile rubber are combined to serve as a substrate of the satin fabric, the physical advantages of being light, thin, soft, elastic, comfortable and glossy of the satin fabric are guaranteed, and in addition, the heat dissipation type satin fabric is prepared by combining the nano calcium carbonate, the graphene oxide powder and the silicon dioxide.

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 invention relates to the technical field of coating preparation, and particularly discloses a long-acting anti-corrosion alloy coating formula and a preparation method thereof. The raw material is composed of a component A and a component B, wherein the component A comprises 30-50 parts of polyurethane, 20-40 parts of aluminum-zinc alloy powder, 5-7 parts of titanium dioxide, 6-8 parts of talcum powder, 1-3 parts of a defoaming agent, 1-3 parts of a thickening agent and 20-40 parts of water; the component B is a curing agent; the preparation method of the long-acting anti-corrosion alloy coating comprises the following steps: S1, stirring and mixing polyurethane, aluminum-zinc alloy powder, titanium dioxide, talcum powder, a defoaming agent, a thickening agent and water, and grinding to obtain a mixture; and S2, adding a curing agent into the mixture, stirring and mixing, centrifugally filtering, and grinding to obtain the anti-corrosion alloy coating. By designing the raw materials and the proportion, the prepared anti-corrosion alloy coating has relatively high corrosion resistance, wear resistance and excellent metal substrate adhesive force, and long-acting corrosion resistance can be realized.

The invention discloses a preparation method for refining base oil from waste lubricating oil, which comprises the following steps: 1) placing the waste lubricating oil in an oil-water separator to settle for 12-48 hours, and collecting separated oil; (2) carrying out reduced pressure distillation on the separated oil obtained in the step (1) in a wiped-film evaporator to obtain distillate oil; (3) mixing the distillate oil obtained in the step (2) with a mesoporous adsorption carrier under ultrasonic waves, the addition amount of the mesoporous adsorption carrier being 3-10% of the mass of the distillate oil; 4) settling, filtering and collecting an oil phase; 5) thin film evaporation; and 6) carrying out short-path distillation. The method has the advantages that not only can degraded components in the waste lubricating oil be effectively removed, but also the yield of the base oil can be effectively increased.

The present invention relates to a wear-resistant electroplating protective coating and a method for using the same, and belongs to the technical field of electroplating protective coatings. The present invention uses a silane coupling agent and vermiculite to modify polyurethane acrylate. The silane coupling agent can serve as a bridge to connect PUA and inorganic fillers, improve the compatibility and interfacial bonding between them, thereby improving the water resistance of PUA. Adding vermiculite powder to PUA can improve the thermal stability and mechanical properties of the composite material. The addition of modified nano hydrated silica in the present invention can significantly improve the hardness and wear resistance of the coating, making it more resistant to external friction and wear. The present invention uses screen printing technology to apply the coating on the surface of the substrate during use, which can achieve precise coating of the coating, avoid waste of the coating and pollution of the substrate, and clarify the scope of local protection.

The invention provides a Ni9S8-coated Au core-shell nanocrystal and a preparation method thereof, the Ni9S8-coated Au core-shell nanocrystal comprises an inner core and an outer shell wrapping the inner core, the inner core is Ni9S8, and the outer shell is Au. The preparation method comprises the following steps: mixing nickel diethyldithiocarbamate with oleylamine, 1-octadecene and 1-dodecyl mercaptan to form a uniform solution; under a protective atmosphere, heating the uniform solution to a reaction temperature, and carrying out a reaction to obtain a reaction solution; adding a tri-n-octylphosphine solution of chloroauric acid into the reaction solution, and reacting at the reaction temperature; and cooling the obtained reaction solution to room temperature, adding a mixed solution of a polar solvent and a non-polar solvent, separating a solid product, and drying to obtain the Ni9S8-coated Au core-shell nanocrystal. Due to the unique structure and potential properties of the Ni9S8-coated Au core-shell nanocrystal, the Ni9S8-coated Au core-shell nanocrystal has wide application potential in the fields of catalysis, energy storage, sensing and the like.

The present invention belongs to the field of pharmaceutical chemistry and relates to pyridine compounds, pharmaceutical compositions containing the same, preparation methods and uses thereof. Specifically, the present invention relates to a compound having a structure of formula I, which exhibits good HPK1 inhibitory activity and can be used as a highly effective HPK1 inhibitor for preventing and / or treating HPK1-related diseases.

The invention discloses a polyurethane grouting material and a preparation method thereof, and belongs to the technical field of building waterproof materials, the grouting material is composed of polyether polyol, a functional agent, isocyanate, polyether glycol, dimethyl siloxane, polymethylene polyphenyl polyisocyanate and other raw materials, the components are mixed according to a specific weight ratio, so that the grouting material is endowed with unique performance. The preparation method comprises the steps of dehydration treatment, prepolymer reaction, mixed degassing, solvent adjustment and the like, compared with the prior art, the uniformity and stability of the grouting material are ensured, and the obtained grouting material has wide application prospects in building structure reinforcement, water prevention and sealing engineering, especially in a high-humidity or underwater environment, and has good application prospects. The excellent performance is shown.

The invention relates to the technical field of elastic floor tile materials, in particular to an elastic floor tile material prepared based on silicone rubber modification and a preparation method of the elastic floor tile material. Maleic anhydride grafted polypropylene and ethylene propylene rubber serve as main raw materials to prepare an elastomer base material, and a compact cross-linked network structure can be formed in the material; the high-strength elastic base material can effectively resist the impact of external force; in the preparation process of the floor tile material, raw materials and processes which are harmless to human bodies are adopted, so that the floor tile material is soft and comfortable in surface touch feeling, does not cause irritation or harm to skin, and is particularly suitable for places needing to frequently contact with the human bodies; therefore, the elastic floor tile material prepared based on silicone rubber modification has excellent physical and mechanical properties, excellent weather resistance, environmental protection, safety, diversified application scenes and personalized customization capability.