33results about How to "Reduce Shrinkage Problems" patented technology

The invention discloses a preparation method of a wide-temperature-range multistage phase-change temperature-adjusting asphalt mixture. The preparation method comprises the following steps: respectively preparing a plurality of different composite organic eutectic phase-change materials; a plurality of different composite organic eutectic phase-change materials are compounded according to different proportions to obtain the wide-temperature-range multistage phase-change material. The wide-temperature-range multi-stage phase-change material is doped into an asphalt mixture according to the mass ratio of 3%-5%, and the wide-temperature-range multi-stage phase-change temperature-adjusting asphalt mixture is formed. The wide-temperature-range multi-stage phase-change temperature-adjusting asphalt mixture disclosed by the invention can continuously play a phase-change heat storage function in a high-temperature environment in summer, and achieves the effects of delaying the pavement temperature change rate, reducing the pavement maximum temperature, delaying the daily maximum appearance time, reducing the pavement surface temperature and improving the pavement temperature. Therefore, the urban heat island effect can be relieved, and the pavement durability is prolonged.

The invention belongs to the technical field of aqueous zinc metal batteries, provides a composite negative electrode material for an aqueous zinc metal battery and a preparation method thereof, and aims to improve the cycle performance of the aqueous zinc metal battery and promote commercial application of the aqueous zinc metal battery. The composite negative electrode material is of a three-layer coating structure and is composed of zinc powder, carbon balls and bismuth nanosheets, the carbon balls are of an egg yolk shell structure, the zinc powder is coated with the carbon balls, and the surfaces of the carbon balls are coated with the bismuth nanosheets; the unique structure of the composite negative electrode not only can provide a rich continuous interface to promote efficient transfer of electrons, but also can reduce volume expansion and shrinkage generated in the repeated electroplating / stripping process of zinc metal, so that the electric contact loss of the zinc negative electrode is effectively inhibited; and the outer bismuth nanosheet not only can inhibit the hydrogen evolution reaction of a zinc metal / electrolyte interface, but also can enhance the transmission of ions in the electrochemical process, and induce the Zn (002) crystal face to be deposited on the surface of the electrode, so that the formation of zinc dendrites can be effectively inhibited through the plane deposition mechanism.

The invention relates to high-valued resource utilization of solid wastes in the field of buildings, in particular to an all-solid-waste high-ductility low-shrinkage geopolymer concrete material and a preparation method thereof. Comprising the following raw materials in parts by mass: 615 to 1230 parts of coal gangue powder, 0 to 615 parts of fly ash, 123 to 492 parts of an alkali activator, 369 to 443 parts of fine aggregate, 24.6 to 98.4 parts of a shrinkage reducing agent, 12.3 to 24.6 parts of a water reducing agent, 6.15 to 12.3 parts of hydroxypropyl methyl cellulose, 369 to 418 parts of water and 19.5 to 26 parts of fibers. The concrete developed by the invention integrates high ductility, low shrinkage and strength grade not lower than C35, can be used for pouring and repairing flexural members and road and bridge deck concrete in the civil engineering field, reduces the maintenance frequency of the members, prolongs the service life of the structure, and reduces the maintenance cost; and moreover, resource high-value utilization of industrial solid waste and building solid waste can be realized, and carbon emission is reduced.

The invention discloses a straw powder filled biodegradable composite material and a preparation method thereof, and relates to the technical field of biodegradable composite materials, the preparation method of the biodegradable composite material comprises the following steps: S1, pretreating straw; s2, impurities are removed through winnowing; s3, removing magnetic impurities; s4, cleaning and drying; s5, performing high-pressure steam treatment; s6, drying in the oven and crushing again; s7, adding into a high-speed mixer and mixing; s8, extruding the biodegradable composite material, and cooling and shaping the biodegradable composite material; and S9, cutting and polishing are conducted, and performance testing is conducted. The biodegradable composite material is prepared from agricultural waste, waste accumulation is reduced, sustainable development is promoted, the straw powder filled biodegradable composite material has biodegradability, high strength and good processability, and the straw powder filled biodegradable composite material is suitable for large-scale production. The problems of reducing agricultural wastes, enhancing mechanical properties and environmental protection performance, improving processability and reducing raw material cost can be solved.

The invention relates to the field of constructional engineering materials, in particular to a preparation method of multi-active-center synergistic flow-state solidified soil, which ensures the uniformity and stability of materials by accurately controlling the particle size of construction waste and the proportion of high-temperature treated sludge. The construction waste is mixed with the high-temperature sterilized sludge, so that the fluidity and self-compaction of the solidified soil are improved, the construction period is shortened, the cost is reduced, and the environmental pollution is reduced. The FAU / carbon composite material enhances the early strength and bearing capacity of the solidified soil, shortens the solidification time and enhances the impermeability. The montmorillonite soil improves the workability and environmental adaptability of the solidified soil, absorbs excessive moisture, reduces shrinkage and cracking, and improves the freeze-thaw resistance. Through the synergistic effect of the two components, stress transmission and dispersion are promoted, effective transmission of heat is improved, the mechanical property and the heat-conducting property of the fluid-state solidified soil are enhanced, the engineering efficiency and the environmental adaptability are improved, and an economical and practical solution is provided for the engineering environment.

The invention belongs to the field of medical rubber materials, and particularly relates to a vulcanization preparation process of a medical puncture-resistant rubber gasket. A vulcanization preparation process of a medical puncture-resistant rubber gasket comprises the following steps: S1, raw rubber raw material preparation: crushing and mixing raw rubber raw materials to be vulcanized into raw rubber powder, removing impurities, and sieving; the raw rubber raw materials comprise halogenated butyl rubber, polyisoprene rubber and epichlorohydrin rubber; s2, preparing a rubber compound; the preparation method comprises the following steps: preheating an internal mixer to 80-100 DEG C, adding 80-90 parts by weight of raw rubber powder into the internal mixer, and refining at 115-125 DEG C for 5-9 minutes; adding 12-22 parts by weight of a modified composite filler, 2-6 parts by weight of zinc oxide, 1-3 parts by weight of stearic acid, 3-8 parts by weight of a crosslinking auxiliary agent and 0.5-1.2 parts by weight of an anti-aging agent, and mixing for 18-22 min; s3, calendaring and sheet discharging: calendaring and molding the rubber compound obtained in the step (2) to obtain a rubber compound sheet; s4, prevulcanization: putting the rubber compound sheet calendered in the step (3) into a mold cavity of a press vulcanizer, and carrying out under-vulcanization production to obtain a preformed sheet; the preformed rubber sheet in the step (4) and an organic solvent are subjected to cleaning treatment and drying and then put into a vulcanization mold to be subjected to vulcanization forming, the rubber gasket is obtained, the vulcanization temperature ranges from 140 DEG C to 150 DEG C, and the vulcanization time ranges from 3 min to 7 min. In order to solve the problem that the use performance of a medical rubber gasket is affected due to the fact that the medical rubber gasket is needled to fall scraps and is poor in rebound resilience, the invention provides the vulcanization preparation process of the medical needling-resistant rubber gasket.

The utility model provides a concrete crack prevention curing device which comprises a roller, the two ends of the roller are rotationally connected with fixing shafts, and the side walls of the fixing shafts are fixedly connected with supporting rods. The top end of the supporting rod is rotationally connected with a spraying pipe, and a plurality of atomizing nozzles are mounted on the side wall of the spraying pipe; the top end of the supporting rod is in threaded connection with the screw rod, and the supporting rod abuts against the side wall of the spraying pipe; fixing rods are symmetrically arranged on the side wall of the supporting rod, and the bottom ends of the fixing rods are connected with a plastic cloth layer. The curing device for concrete crack prevention has the advantages that the plastic film is convenient to lay, and the interior of the plastic film is kept moist.

The utility model relates to the technical field of material drying, and discloses a building material drying device which comprises a drying box, a first feeding port is formed in the front end of the drying box, a second feeding port is formed in the rear end of the drying box, heating boxes are fixed to the two sides of the drying box correspondingly, heaters are installed in the heating boxes, and a rotating shaft is arranged in the center of the interior of the drying box; rotating frames are fixed to the outer walls of the two ends of the rotating shaft, and a plurality of material positioning frames are arranged on the inner walls of the ends, close to each other, of the two rotating frames at equal intervals. The feeding ports are formed in the two sides of the drying box, building materials which are well dried in the drying box can be conveniently and rapidly replaced, the working efficiency is improved, through combined arrangement of the rotating frame and the material positioning frame, a plate is placed on the rotating frame, and the two ends of the plate are clamped and positioned through the material positioning frame; the multiple plates can be pushed to rotate synchronously along with rotation of the rotating shaft, at the moment, the heater works for heating, the plates are exposed in a high-temperature environment, and water in the building plates can be rapidly removed.

The utility model discloses a kind of drying setting devices, including drying mechanism, moving mechanism and rotating mechanism, drying mechanism is equipped with drying chamber, moving mechanism can enter and exit drying chamber, rotating mechanism includes driving part, clamping piece and first support, driving part is installed on moving mechanism, the output end of driving part is connected with clamping piece, and clamping piece can be driven to rotate, clamping piece can fix the one end of the cylinder body coated with carbon fiber, first support is movably installed on moving mechanism, and first support is used to support the other end of cylinder body. It solves the problem that the cylinder body coated with carbon fiber is directly placed in the drying oven for drying in the prior art, and uneven heating of carbon fiber is prone to occur.

The invention relates to the technical field of lithium ion batteries, in particular to a battery diaphragm, a preparation method of the battery diaphragm and a lithium ion battery, and the battery diaphragm comprises a flexible film substrate, and a ceramic coating and a polydopamine coating which are sequentially arranged on the surface of the film substrate from inside to outside. According to the technical scheme, the ceramic coating and the polydopamine coating are compounded on the membrane substrate, so that the electrolyte affinity and the thermal stability of the battery diaphragm can be effectively improved, and the electrochemical performance and the use safety of a battery can be improved.

The invention discloses a betaine composition with an antihypertensive effect and a preparation method thereof, and belongs to the technical field of pharmaceutical compositions.The preparation method comprises the steps of tablet core preparation, primary coating liquid preparation, secondary coating liquid preparation, primary coating and secondary coating; the step of preparing the primary coating liquid comprises the steps of preparing a filling agent and performing primary mixing; the step of preparing the secondary coating solution comprises the steps of preparing a supramolecular composition and performing secondary mixing; according to the prepared betaine composition, the problem that the blood pressure is too low after the prepared betaine composition is used can be avoided by controlling the release speed of the angiotensin converting enzyme inhibitor, and the prepared betaine composition is good in storage resistance, high in percent of pass and suitable for industrial production. And the content difference of the angiotensin converting enzyme inhibitor in the prepared betaine mixture is small.

The present application relates to the technical field of 3D printing concrete, and discloses a preparation method of 3D printing concrete mixed with plant fibers, which comprises the following steps: step 1, soaking and drying the plant fibers treated with water glass in saturated limewater; step 2, blending the plant fibers with sulphoaluminate cement; step 3, preparing alkali-activated 3D printing concrete and pumping it by taking 30-50 parts of water glass, 20-40 parts of sodium hydroxide, 100-200 parts of limestone powder, 1000-1200 parts of sand, 100-200 parts of extra-fine sand, 400-500 parts of mineral powder, 50-150 parts of rice husk ash, 20-40 parts of hydroxypropyl methyl cellulose, 220-300 parts of water and 5-10 parts of water reducing agent according to mass fraction; step 4, forcibly stirring the concrete and adding the product obtained in step 2; and step 5, printing the concrete and spraying a setting agent between the concrete layers. The present application helps to improve the constructability of 3D printing concrete and reduce its shrinkage.

This application relates to the field of activated carbon fiber technology, specifically disclosing a method for preparing highly adsorbent activated carbon fibers. This application uses oxidized modified viscose fiber as a precursor, which is then activated by plasma and subsequently seeded with nanocrystals to form a carbon-silicon composite intermediate. After carbonization, the silica is removed by hydrofluoric acid etching, resulting in a relatively continuous hierarchical porous structure. Plasma post-treatment is then used to adjust the surface properties of the activated carbon fiber surface and the pores. Compared to activated carbon fibers prepared using conventional phosphoric acid activation methods currently available on the market, the activated carbon fibers obtained in this application improve the mass transfer efficiency of macromolecular pollutants through their hierarchical porous structure. Furthermore, the pores, after plasma post-treatment, can fully utilize their adsorption and binding capacity for polycyclic aromatic hydrocarbons (PAHs). Therefore, the activated carbon fibers obtained in this application have a higher adsorption capacity for PAHs.

The invention discloses a spinning machine with a dust removal function, and relates to the technical field of machining, the spinning machine comprises a spinning machine main body of a rectangular frame structure, and the outer wall of the top end of the spinning machine main body is rotatably connected with a feeding device used for smoothly and continuously unwinding roving or other semi-finished products; the inner wall of the top end of the spinning machine body is fixedly connected with a plurality of traction wheels used for stably pulling raw materials into a follow-up device from a feeding device through friction force or mechanical force, and the lower end of the feeding device is rotationally connected with a plurality of traction devices used for lengthening and thinning rough yarn to the fineness needed by spun yarn. The spinning machine comprises a spinning machine body, a rotary friction twisting mechanism is arranged on the inner wall of one side of the spinning machine body, a surface expanding heavy twisting mechanism is arranged at the center of the upper end of the spinning machine body, and a distance adjusting and controlling mechanism is arranged at the rear end of one side of the spinning machine body. The friction force between the fibers can be further increased.

The invention provides powder containing a bridge structure, a preparation method of the powder, application of the powder in anti-darkness liquid foundation and a product, and relates to the technical field of cosmetics. The invention provides a powder containing a bridge structure, the powder comprises submicron polymer spheres, a coloring agent, a powder modifier, a surface gloss treating agent and an antioxidant, and the powder can be used for preparing an anti-darkness liquid foundation. The anti-darkness liquid foundation composed of water, the bridge-type structure powder prepared by the invention, a film-forming agent, an emulsifier, an oil phase component, a matrix and other components can achieve the makeup feeling of good anti-darkness effect and no powder floating during makeup.

This invention relates to a multipath adaptive full-focus ultrasound imaging method for corner areas of composite materials. The method includes: acquiring full-matrix ultrasound data of the corner area of ​​the composite material; constructing a quasi-P-wave group velocity sound velocity model based on the characteristic parameters of the composite material; constructing a surface-layered discrete model with a local coordinate system, and abstracting it into a directed graph G based on the quasi-P-wave group velocity sound velocity model; searching for a set of candidate propagation paths from array elements to arbitrary nodes in the directed graph G, and constructing multiple full-focus imaging TFM images based on the candidate propagation paths and the full-matrix ultrasound data; calculating path score factors based on the multiple full-focus imaging TFM images, and performing pixel-by-pixel weighted fusion of the multiple full-focus imaging TFM images based on the path score factors to obtain a fused imaging result. Compared with existing technologies, this invention has advantages such as strong adaptability and improved focusing stability and imaging reliability in corner areas.

What is proposed is a method for protecting cathode blocks of aluminium electrolyzers having prebaked anodes, the method comprising providing a mixture of a refractory material with a binder, applying said mixture as a coating on the surface of the cathode blocks giving consideration to the cell bottom wear profile, and drying said coating. As the refractory material, use is made of a bimodal or polymodal mixture of titanium diboride powders or titanium diboride powder, the granulometric composition of which has a bimodal or polymodal particle size distribution. As the binder, use is made of sulfonated reaction products of naphthalene with formaldehyde having a coke residue of at least 30% by weight; after drying, a layer of graphite powder is applied to the coating surface as protection against oxidizing during commissioning, thus forming, upon heating of the cell bottom, an aluminium-wettable TiB2-C composite coating.

The invention discloses a powder material, a preparation method thereof and an electrode material. The powder material comprises a raw material and a refiner, the refiner comprises at least one of silicon, aluminum oxide, cerium oxide, titanium dioxide, lanthanum oxide, silicon dioxide, zirconium dioxide, nickel oxide, iron oxide, silver, aluminum and iron; the raw material comprises silicon; or a combination of silicon and aluminum; the addition amount of the refiner is 0.01%-2% of the mass of the raw materials. The novel refiners are adopted, the grain size of the powder material can be effectively refined, and the refiners are easy to obtain.

The present invention belongs to the technical field of gypsum building materials, and in particular discloses a lightweight gypsum self-leveling mortar with high volume and low shrinkage. The lightweight gypsum self-leveling mortar with high volume and low shrinkage improves the water-to-material ratio of the gypsum self-leveling mortar from 0.3 to 0.5 in the prior art to 0.6 to 1.35 by optimizing the amount of water reducing agent, optimizing the viscosity and amount of water retaining agent, thereby reducing the material consumption of the gypsum self-leveling mortar from 12.5 kg to 16 kg to 6 kg to 10 kg per square meter when constructing a 1 cm thickness, greatly improving its volume, and greatly reducing the shrinkage; and under such a high water consumption, the product still does not have water seepage and stratification. It not only solves the problem of hollowing and cracking that may be caused by existing products in the later stage, but also solves the problem that products prepared by adding lightweight aggregates are prone to stratification and water seepage and lack of strength on the surface during construction on the construction site, and balances the comprehensive performance requirements of the gypsum self-leveling mortar such as light weight, high volume, and no water seepage in actual construction, and significantly reduces the material cost.

The invention provides a lithium ion battery positive electrode doping screening method and device, and the method comprises the steps: firstly, determining an experiment effective doping element and a positive electrode material, and screening to-be-selected elements according to a preset index; then, constructing an LNMO initial model of the positive electrode material, and generating a plurality of first doping models in combination with the to-be-selected elements; then, a second doping model is screened out by calculating the voltage and the volume strain ratio of the battery; then, the doping concentration and the capacity retention ratio are evaluated, and a third doping model is further screened out; and finally, comprehensively considering the synthesis difficulty and the preparation cost of the doping material, and finally determining a target doping model. According to the method and the device, a plurality of key factors including voltage, strain, concentration, capacity, cost and the like can be comprehensively considered, and the optimal doping scheme is efficiently screened out, so that the energy density and the structural stability of the lithium ion battery positive electrode material are improved, and the requirement of a high-performance battery is met.

The invention discloses durable concrete and a preparation method thereof, and relates to the technical field of concrete. According to the invention, mesoporous silica fibers are modified, the surfaces of the mesoporous silica fibers are aminated, and then amino groups on the mesoporous silica fibers and methoxyl groups on hydroxypropyl methyl cellulose are subjected to Mannich reaction chemical bonding to form a three-dimensional fiber structure net, so that the performance strength of the concrete is enhanced, slow loss of water is ensured, and the thermal expansion coefficient of the concrete is reduced; the high-strength anti-cracking effect of the concrete is achieved, so that the concrete is very durable; secondly, carboxyl of modified graphene and aminopropyl of octa-aminopropyl polyhedral oligomeric silsesquioxane are reacted and combined to prepare a hybrid filler, so that the dispersity of graphene is solved, various properties of the concrete are enhanced, the graphene interacts with a three-dimensional fiber structure net, the hydrophobic effect is achieved, meanwhile, the wear resistance of the concrete can be improved, and the service life of the concrete is prolonged. Therefore, the effect of longer service time is achieved. The concrete prepared by the invention has the effects of hydrophobicity, cracking resistance and high durability.

The invention belongs to the technical field of oil-gas exploration and development, and discloses an anti-CO2 gas channeling plugging agent and a preparation method thereof.The preparation method comprises the steps that 100 parts by mass of epoxy resin and 12-16 parts by mass of diluent are added into a reaction container and mixed to be uniform, then deoxygenization is conducted, and reaction liquid is obtained; the preparation method comprises the following steps: mixing diethylenetriamine, methylene dicycloalkyl amine and m-phenylenediamine to obtain a curing agent, and then adjusting the pH value to 6-7 to obtain a mixed solution; and adding 15-20 parts of the mixed solution into the reaction solution, and reacting while heating to obtain the blocking agent for resisting CO2 gas channeling. The blocking agent for resisting CO2 gas channeling has the advantages of being good in fluidity, high in compressive strength, sufficient in toughness reserve, high in corrosion resistance and low in elastic modulus.

The application relates to a preparation method of a high-reliability MLCC, and belongs to the technical field of electronic ceramic original devices. The MLCC after glue removal is subjected to heat treatment, the inner electrode layer is partially oxidized, and then sintering is performed; the oxidation layer on the surface of the inner electrode can improve the sintering shrinkage temperature, delays the shrinkage of the inner electrode layer, and through limiting the temperature and holding time and other parameters in the heat treatment process, the continuity and flatness of the inner electrode layer are improved, and the product performance of the MLCC is improved; the method does not need to modify the MLCC raw materials and manufacturing equipment, and can realize higher capacity and pressure resistance of the MLCC product by adopting a traditional sintering mode, and has a wide application prospect in the preparation of electronic materials.

The application belongs to the technical field of silicon carbide ceramic preparation, and particularly relates to a silicon carbide ceramic slurry based on DIW-3D printing, a silicon carbide ceramic product and a preparation method. The silicon carbide ceramic slurry is prepared from raw materials including the following components and weight contents: silicon carbide mixed powder 60-100 parts, thermosetting resin 10-40 parts, dispersing agent 5-15 parts and thermal initiator 0.01-1 part. The application realizes the application of DIW-3D printing in the preparation of silicon carbide ceramic through the synergistic effect of double-particle-size SiC grading, introduction of B4C sintering aid, special resin and dispersant system, thermal initiation and solidification, DIW rheological design and gas pressure sintering, saves the material cost in the manufacturing process, prepares a silicon carbide sample with excellent mechanical properties, and further widens the development of silicon carbide ceramic.

The utility model relates to the technical field of injection molding, and discloses an injection mold structure for umbrella-rib-shaped products made of PP (polypropylene) materials, which comprises a lower mold and an upper mold arranged on the right side of the lower mold. According to the injection mold structure for the umbrella-rib-shaped product made of the PP material, a segmented injection technology is adopted, two groups of hot runners are arranged in each group of independent cavities, the injection process is divided into a plurality of stages, the injection speed and pressure are adjusted according to filling requirements of different areas, uniform flowing of the PP material in a complex umbrella rib structure can be ensured, and the production efficiency is improved. A plurality of small runners are arranged in the mold, and particularly the tiny runner design is adopted at the detail part of the umbrella rib, so that the PP material can uniformly flow in a complex cavity, and the phenomenon of unsmooth flow or incomplete injection molding is avoided; the problems that a traditional mold is poor in fluidity, incomplete in filling, long in forming period and prone to buckling deformation in the injection molding process are solved.

This invention proposes a low-shrinkage photocurable elastic resin composition based on synergistic compensation and its application. The resin composition has low viscosity and excellent photocurable printing properties. During molding, the non-reactive diluent is volatilized first by a simple stepwise heating of the printed model, and then the temperature is raised to the foaming temperature to cause the thermally expanding microspheres to expand and foam. At this temperature, the chain extender is further condensed. Through the synergistic effect of the non-reactive volatile diluent and the thermally expanding microspheres, physical compensation for curing shrinkage is achieved, which can meet the requirements of both low shrinkage and high elasticity. The method is simple and easy to implement and suitable for industrial applications.

The invention discloses a production method for preparing autoclaved aerated concrete from solid waste tail gas powder, and relates to the technical field of concrete production.The production method of the autoclaved aerated concrete comprises the following steps that S1, large-particle impurities in the solid waste tail gas powder are screened out; s2, scrap iron, plastic and wood chips are removed; s3, humidity detection and evaluation are carried out; s4, screening treatment is conducted, and drying is conducted; s5, the dried solid waste tail gas powder is screened, ground and screened; s6, measuring the chemical composition of the solid waste tail gas powder; s7, adding an air entraining agent into the solid waste tail gas powder, the siliceous material and the calcareous material; s8, designing a three-factor three-level orthogonal test; and S9, post-treatment is carried out. According to the method, large-particle impurities in the solid waste tail gas powder are screened out, scrap iron, plastic and wood chips in the solid waste tail gas powder are removed, the solid waste tail gas powder can be purified, resource recycling is achieved, the quality of the autoclaved aerated concrete is improved, and the production cost is reduced.

The invention provides an all-solid-state battery and a manufacturing method thereof, and belongs to the technical field of solid-state batteries, the all-solid-state battery comprises a positive electrode, a negative electrode and a solid-state electrolyte, the positive electrode comprises a positive current collector and positive active slurry, the negative electrode comprises a negative current collector and negative active slurry, and the solid-state electrolyte is prepared from electrolyte slurry. The positive active slurry, the negative active slurry and the electrolyte slurry all comprise lithium titanate intercalated graphite, a binder, a conductive agent and a solvent, and the mass ratio of the lithium titanate intercalated graphite in the positive active slurry, the negative active slurry and the electrolyte slurry is 4.5-5.5%; the preparation method of the lithium titanate intercalated graphite comprises the following steps: adding graphite into an ammonium sulfate aqueous solution with the mass fraction of 45-50%, then sequentially adding potassium permanganate and lithium titanate, stirring for 60 minutes in a constant-temperature water bath, washing with water, then soaking for 2-3 hours until the pH value is 6.0-7.0, filtering, drying in a drying oven at the temperature of 60-70 DEG C, and calcining and puffing in a muffle furnace at the temperature of 550-600 DEG C to obtain the lithium titanate intercalated graphite. According to the invention, the capacity retention ratio of the prepared all-solid-state battery can be effectively improved, and the cycle service life of the all-solid-state battery is prolonged.

The invention relates to a prestressed concrete beam preparation method, which comprises: S1, mixing and stirring cement, fly ash, fine aggregate and coarse aggregate to obtain a dry material; s2, mixing nano silicon dioxide, natural zeolite and water, and performing ultrasonic dispersion to obtain dispersion liquid; mixing and stirring the dry material and the dispersion liquid to obtain a wet material; s3, adding a water reducing agent into the wet material, and stirring to obtain concrete slurry; s4, the concrete slurry is poured into a post-tensioned prestressed concrete beam mold, then primary curing is conducted, a concrete beam blank is obtained, and the curing temperature ranges from 35 DEG C to 55 DEG C; after prestress is applied to the concrete beam blank, a prestressed concrete beam blank is obtained; and S5, the prestressed concrete beam blank is subjected to secondary curing at the curing temperature of 40-65 DEG C, and the prestressed concrete beam is obtained after curing. The problems that in the prior art, a concrete beam deforms and cracks more after being used for a long time, the early strength of the concrete beam is increased slowly, and the cost of the concrete beam is too high are solved.

The invention discloses a preparation method of cellulose / nano-zinc oxide composite aerogel, and belongs to the field of functional materials. The preparation method comprises the following steps: modifying nano zinc oxide with a silane coupling agent, and dissolving cellulose in a pre-cooled aqueous solution of sodium hydroxide and urea to obtain a cellulose solution; adding the modified nano-zinc oxide particles into a cellulose solution in a stirring state to obtain a cellulose / nano-zinc oxide mixed solution, then performing directional freezing, replacing the formed gel with ethanol, and washing with deionized water to remove redundant solvent until the pH value is equal to 7 to obtain the cellulose / nano-zinc oxide composite hydrogel. And drying in a freeze dryer to obtain the cellulose / nano-zinc oxide composite aerogel. The interior of the prepared aerogel has an orderly-arranged directional pore structure, and the aerogel has the advantages of being good in mechanical property, hydrophobic property and heat-insulating property.