34results about How to "Improve surface structure" patented technology

The invention relates to the technical field of composite current collectors, and discloses a composite current collector. Comprising the following operation steps: S1, uniformly mixing thermal expansion microspheres and a polymer material, and performing melt extrusion and two-way stretching to obtain a current collector base film; s2, depositing a transition layer on each of the two surfaces of the current collector base film to obtain a composite collector film A; s3, depositing a metal layer on each of the two surfaces of the transition layer of the composite film A to obtain a composite film B; and S4, depositing a protective layer on each of the two surfaces of the metal layer of the composite film B to obtain the composite current collector.

The present application provides a water-resistant and impact-resistant potassium magnesium phosphate repair material, which belongs to the technical field of building materials. According to the mass fraction, the material includes: component A: 8-15 parts of acrylamide, 0.1-0.18 parts of initiator, 0.06-0.1 parts of cross-linking agent, 14-24 parts of solvent; component B: 50-90 parts of modified magnesium oxide, 25-30 parts of potassium dihydrogen phosphate, 1-5 parts of retarder, 0.4-1.2 parts of polyvinyl alcohol fiber; the modified magnesium oxide is obtained by treating magnesium oxide with water glass. The present invention not only improves the water resistance of potassium magnesium phosphate cement, but also optimizes the operability during the construction process. The prepared polymer-modified potassium magnesium phosphate repair material has high early strength and impact resistance, and can be widely used in highways, airport runways, military and other projects that require rapid repairs.

The invention relates to a method for preparing aniline through gas phase hydrogenation. The method comprises the following steps: reacting nitrobenzene and hydrogen under the action of a catalyst to obtain aniline, a carrier of the catalyst comprises modified silica gel, an active component of the catalyst comprises Cu, and an auxiliary active component of the catalyst comprises Co and / or Ce; the modification method of the modified silica gel comprises the following steps: carrying out alkali treatment on silica gel; the catalyst is prepared by the following steps: loading an active component Cu and an auxiliary active component on modified silica gel, and then carrying out heat treatment in an ammonia gas atmosphere to obtain the catalyst. The carrier silica gel of the catalyst is modified through alkali treatment, the surface and pore channel structure of the carrier is optimized, copper is used as an active component, Ce and / or Co are / is used as catalyst auxiliaries, and the catalyst is subjected to ammonia gas heat treatment modification; the catalyst is used for preparing aniline through gas-phase reduction of nitrobenzene and hydrogen, has excellent nitrobenzene conversion rate and aniline selectivity, and reduces the energy consumption and cost of aniline post-treatment.

The trash rack cleaning equipment for the water conservancy project comprises a trash rack, retaining walls are fixedly connected to the front face and the back face of the trash rack, cleaning devices are installed on the inner sides of the retaining walls, a driving device and a smashing mechanism are installed at the tops of the retaining walls, and the smashing mechanism comprises a fixing frame fixedly connected to the inner sides of the retaining walls; and crushing rollers are arranged on the front side and the rear side of the interior of the fixing frame, rotating rods are fixedly connected to the inner walls of the crushing rollers, the rear ends of the rotating rods are movably connected with the inner walls of the retaining walls through bearings, the front ends of the rotating rods penetrate to the front face of the retaining wall on the front side, and the crushing rollers can crush dirt when rotating mutually. When the trash rack cleaning device is used, under the action of the smashing mechanism and the conveying mechanism, trash hooked by the cleaning device can be smashed and conveyed, cleaning inconvenience caused by the fact that an existing trash rack cleaning device is not provided with an additional smashing mechanism and an additional conveying mechanism is avoided, and the trash rack cleaning device has the advantage of being convenient to use.

The invention discloses an anti-pollution flashover and anti-impact tempered glass insulator and a processing technology thereof.The processing technology comprises the steps that silicon dioxide, sodium carbonate, calcium oxide, magnesium oxide, cerium dioxide, niobium trioxide, scandium trioxide, tungsten carbide and nano boron nitride are evenly mixed according to the formula ratio and fused, and fused liquid is obtained; then slowly injecting the molten liquid into a mold preheated in advance in a nitrogen environment, molding, and demolding to obtain a blank; carrying out primary nitriding treatment, pulsed magnetic field treatment, toughening treatment, heat treatment and secondary nitriding treatment to obtain a toughened glass part; and finally, binding the iron cap, the toughened glass piece and the steel foot into a whole by using an adhesive to obtain the toughened glass insulator. The toughened glass insulator has excellent anti-pollution flashover and anti-impact performance.

The invention provides an electrolytic bath, an anode catalytic material and a preparation method and application of the anode catalytic material, and the anode catalytic material comprises a substrate which is an alloy containing a nickel element and an iron element; the surface of the substrate is coated with the nickel-rich oxide layer, the nickel-rich oxide layer comprises nickel oxide and / or nickel hydroxide, and the mass content of nickel elements in metal components of the nickel-rich oxide layer is larger than 70%.

The invention provides a recycling method for waste tire pyrolysis residues. The recycling method comprises the following steps: S1, firstly carrying out wire drawing on waste tires; s2, the waste tires obtained after wire drawing are put into a crushing unit to be crushed; s3, the crushed waste tires are added into a pyrolysis processor; s4, carrying out water cooling on solid slag generated by pyrolysis of the old tire to obtain a primary carbon black material; s5, mixing the black primary material and a desulfurizing agent according to the mass; s6, washing: adding the crude carbon black into a granulating agent, and washing in a washing solution; s7, granulation: conveying the carbon black slurry into a granulator through a screw conveyor, extruding, forming and discharging; and S8, drying and discharging. S9, compounding the dried and discharged carbon black with water, a water reducing agent and cement; and S10, vibrating, stirring and forming.

The invention discloses a preparation method of a silicon carbide coating on the surface of a graphite base. The preparation method comprises the following steps: (1) carrying out ultrasonic cleaning on the graphite base; (2) dispersing graphite powder, silicon powder and silicon carbide powder into a polyvinylpyrrolidone aqueous solution to obtain a coating solution; (3) coating the surface of the graphite base with the coating liquid in the step (2), and drying; (4) placing the graphite sagger filled with the solid silicon material in a vacuum siliconizing furnace, placing the graphite base on a bracket in the graphite sagger, and carrying out gas-phase siliconizing treatment; the solid silicon material is a mixture of silicon and silicon dioxide; (5) the graphite base subjected to siliconing treatment is put into acid liquor to be etched; the preparation method is simple in process, the prepared silicon carbide coating is uniform in covering, excellent in adhesive force, high in density and low in cost, the oxidation resistance of the graphite base in a high-temperature environment is improved, and the service life of the graphite base in the high-temperature environment is prolonged.

The invention belongs to the field of materials, and particularly relates to a lightweight flame-retardant impact-resistant protective material and a preparation method thereof. According to the preparation method, based on lightweight design, phosphorus-containing organosilane functionalized hollow glass microspheres are compounded with shear hardening gels of different structures, so that the severe cold flow property of the shear hardening gels is improved, and meanwhile, the shear hardening gels are endowed with lightweight, flame-retardant and heat-resistant characteristics; meanwhile, the shear storage modulus and the energy absorption effect of shear hardening gel are improved by utilizing the particle enhancement effect and the hollow structure of the phosphorus-containing organosilane functionalized hollow glass microspheres, and the anti-impact flame-retardant composite material with the comprehensive properties of strain rate response, impact hardening, energy dissipation, flame retardance, heat insulation and the like is prepared.

The present invention provides a rare earth metal modified layered positive electrode material for sodium ion batteries and a preparation method thereof. The main structure of the rare earth metal modified layered positive electrode material for sodium ion batteries is an O3 phase, and the chemical formula is NaNi a Fe b Mn c Re d O 2 , 0.28≤a≤0.33, 0.28≤b≤0.33, 0.28≤c≤0.33, 0≤d≤0.05, Re represents a rare earth metal element; the layered positive electrode material includes spherical secondary particles, the secondary particles include a plurality of stacked flaky primary particles, part of the rare earth metal elements are distributed on the surface of the secondary particles in the form of rare earth metal oxides, and part of the rare earth metal elements are doped in the layered positive electrode material lattice in the form of rare earth metal ions. The positive electrode material provided by the present invention is modified based on rare earth metal elements, and has good sphericity and rich pore structure. The battery containing the positive electrode material exhibits excellent rate performance and good cycle stability.

The invention relates to the technical field of membrane separation, in particular to a composite ultrafiltration membrane based on blending modification and surface modification and a preparation method and application thereof. The method comprises the following steps: firstly, preparing a polydopamine functionalized multi-walled carbon nanotube through oxidation cross-linking auto-polymerization and adhesion of a dopamine compound in an aqueous solution; dissolving a film-forming polymer, a pore-foaming agent and the prepared polydopamine functionalized multi-walled carbon nanotube in an organic solvent, degassing, and preparing a blend film by adopting a non-solvent induced phase separation method; the prepared blended membrane is sequentially and alternately immersed in a tannic acid solution and an aluminum salt solution, a tannic acid-aluminum ion metal phenolic aldehyde network layer is formed on the surface of the blended membrane through a coordination-driven layer-by-layer self-assembly method, and the composite ultrafiltration membrane is obtained. The composite ultrafiltration membrane prepared by the invention has high flux, high selectivity and excellent anti-pollution performance, and is especially suitable for treating and recycling wastewater containing organic macromolecules such as protein, colloid and the like.

The invention provides a method for removing a lignocellulose hydrolysate inhibitor by using chitosan, and belongs to the technical field of biomass processing and utilization, and the method comprises the following steps: soaking crushed poplar in a dilute acid solution according to a solid-to-liquid ratio of 1: 7, adding chitosan into the solution, and carrying out a high-temperature reaction; after the reaction is finished, cooling a reaction system to room temperature, and carrying out solid-liquid separation to obtain a pretreated solid and a diluted acid pretreatment solution; rinsing the pretreated solid, washing the substrate with distilled water until the pH value is close to neutral, and rinsing for three times to obtain a pretreated material; according to the method, chitosan is added in the pretreatment process, so that dilute acid pretreatment inhibitors are reduced, and meanwhile, the problems that fermentation inhibitors challenge microbial fermentation and the enzyme digestibility of pretreated solids is limited under various pretreatment intensities in dilute acid pretreatment are solved. And the characteristics of the pretreated material are improved, the cellulose accessibility is improved, the surface structure is improved, and better conditions are provided for further utilization of biomass.

The present invention relates to a positive electrode active material and a method for preparing the same. The method for preparing a positive electrode material of the present invention includes the steps of mixing a transition metal precursor and a lithium raw material and primarily sintering the mixture to prepare a lithium nickel-based oxide in the form of single particles or quasi-single particles, secondarily sintering the lithium nickel-based oxide in the form of single particles or quasi-single particles, and mixing the secondarily sintered lithium nickel-based oxide and a boron raw material and then heat-treating the mixture to form a coating layer.

The invention discloses a high-performance stainless steel oxygen evolution electrode and its application. The electrode is prepared by the following steps: step 1: pre-treating the surface of the stainless steel to remove impurities on the surface; step 2: placing the stainless steel treated in step 1 in a chloride solution, using a constant current density method to use the stainless steel as an anode for anodic corrosion for 2 to 5 minutes, and then cleaning and drying the stainless steel to obtain an anodic corrosion stainless steel electrode; wherein the concentration of chloride in the chloride solution is 3 to 5 wt%, and the current density during anodic corrosion is 300 to 500 mA / cm 2 ; Step 3: placing the stainless steel electrode treated in step 2 in an alkaline solution, using the stainless steel as an anode for electrolysis, to obtain the stainless steel oxygen evolution electrode; wherein the concentration of the alkali in the alkaline solution is 1 to 2 mol / L, and the current density during electrolysis is 400 to 600 mA / cm 2 , the electrolysis time is 1 to 3 hours.

The invention relates to the field of concrete and oil-gas field development well cementation, in particular to a preparation method, a product and application of a pH-responsive slow-release early strength agent. The preparation method of the pH-responsive slow-release early strength agent comprises the following steps: carrying out pore expansion treatment on porous silicate minerals, adding the pore-expanded silicate minerals into an inorganic salt solution, and carrying out vacuumizing-vacuumizing operation to obtain loaded silicate minerals; adding the loaded silicate mineral into a cationic polyelectrolyte solution for coating to obtain a silicate mineral A; and adding the silicate mineral A into the anionic polyelectrolyte solution for film coating, and repeating the steps of film coating in the cationic polyelectrolyte solution and film coating in the anionic polyelectrolyte solution. The pH response slow-release early strength agent has alkali response behavior, can improve the early strength of set cement, has no negative influence on the thickening performance, and overcomes the defects of the existing early strength agent for deepwater well cementation.

The invention discloses a preparation method and application of sodium hydroxide-carbon dioxide co-modified biochar, which comprises the following steps: preparing biochar by using cellulose crystal as a raw material, impregnating the biochar with sodium hydroxide, carrying out high-temperature heat preservation in a carbon dioxide atmosphere to prepare modified biochar, and applying the modified biochar in adsorption and degradation of tetracycline. When tetracycline is adsorbed, the modified charcoal is directly used, and when tetracycline is degraded, the modified charcoal is combined with sodium persulfate; the preparation method is simple, wide in raw material source and easy to popularize and use.

The invention belongs to the technical field of material science and engineering, and discloses calcining equipment for preparing high-purity tantalum oxide, which comprises a workbench, a fluotantalic acid solution produced by a tantalum-niobium liquid-liquid extraction method is used as a raw material, ammonia water and ammonia gas are used for neutralizing and precipitating, and the high-purity tantalum oxide is prepared by controlling different factors such as ammonia water concentration, tantalum liquid concentration, ammonia flushing speed and neutralizing temperature. Tantalum oxide particles are produced, then the produced tantalum oxide particles are poured into the spherical shell, the calcining crucible is started, heat conduction is conducted on the tantalum oxide particles in the spherical shell through temperature rising of the calcining crucible, and therefore the tantalum oxide particles are calcined, meanwhile, the motor is driven, and the motor drives the rotating shaft and the spherical shell to rotate; in the rotating process of the spherical shell, the tantalum oxide particles can be subjected to rolling heating at the bottom of the inner wall of the spherical shell, the calcining effect on the tantalum oxide particles is improved, the tantalum oxide particles can be heated more uniformly, the conversion efficiency of the tantalum oxide particles can be increased, and the surface structure of the particles can be optimized.

This invention provides a silicon-based anode composite material, its preparation method, and its application. The silicon-based anode composite material comprises a silicon-based core, a boronoxy lattice stabilizer, and an inert material. At least a portion of the boronoxy lattice stabilizer is embedded in the lattice structure of the silicon-based core, and the inert material coats the surface of the silicon-based core. This invention helps improve the initial coulombic efficiency and cycle performance of the silicon-based anode composite material.

The invention discloses a natural gas steam reforming hydrogen production solid base catalyst and a preparation method and application thereof.The preparation method comprises the steps that firstly, a mineral carrier is subjected to doping modification of a metal gadolinium element through hydro-thermal treatment, carrier material powder is obtained, then mixed slurry of a forming auxiliary and nickel and potassium precursors is prepared, and the solid base catalyst is obtained; and finally, adding the mixed slurry into the carrier material powder, and carrying out extrusion molding, curing, drying and roasting to obtain the solid base catalyst. The natural gas steam reforming hydrogen production solid base catalyst prepared by the invention has the characteristics of low reaction temperature, high activity, excellent carbon deposition and coking resistance, long-period operation stability and the like, and is suitable for being applied to a natural gas steam reforming hydrogen production process.

The invention provides a high-voltage sodium ion positive electrode material as well as a preparation method and application thereof. The chemical general formula of the high-voltage sodium ion positive electrode material is Na < x > Ni Mn M < c > O < 2 >-Na < y > Ni < d > Fe < e > Mn < f > N < g > O < 2 >-M < e >, wherein Na < x > Ni Mn M < c > O < 2 > is a P2 type inner core, Na < y > Ni < d > Fe < e > Mn < f > N < g > O < 2 > is an O < 3 > type outer core, and M < e > is a coating substance. The material characteristic with high voltage can be obtained through the P2-type inner core, the P2-type inner core is further coated with the O3-type outer core, high capacity can be provided through specific cooperation of the inner core and the outer core, meanwhile, the structure stability of the inner core can be kept, and the surface of the outer core is further coated with a layer of oxide, so that the performance of the capacitor is improved. The sodium carbonate can react with the residual sodium source on the surface, reduces the residual sodium on the surface, is beneficial to the processing performance of the material, effectively protects the surface of the material, and enables the material to have the characteristics of high capacity, high voltage and long cycle.

The invention provides a perovskite solar cell and a preparation method thereof. The method comprises the following steps: preparing a first carrier transport layer on the surface of one side of a conductive surface of a transparent conductive substrate; performing laser treatment on the surface of one side, far away from the transparent conductive substrate, of the first carrier transport layer by adopting a surface laser source to obtain a modified first carrier transport layer; the projection area of the surface laser source is 1-10000 mm < 2 >; the first carrier transport layer is a hole transport layer or an electron transport layer; and sequentially preparing a perovskite active layer, a second carrier transport layer and a metal electrode layer on the surface of one side, far away from the transparent conductive substrate, of the modified first carrier transport layer to obtain the perovskite solar cell. The first carrier transport layer is subjected to laser processing, the surface structure of the first carrier transport layer can be improved, and the modified first carrier transport layer is obtained, so that the energy level matching and the carrier mobility between the modified first carrier transport layer and the perovskite active layer are improved, and the photoelectric conversion efficiency of the perovskite solar cell is further improved.

The electrochemical etching method comprises the following steps: carrying out constant-current electrodeposition in an electroplating solution by taking a nickel-iron metal salt containing a pore-forming agent as the electroplating solution, taking a nickel net as a working electrode and taking a platinum sheet as a counter electrode to ensure that the deposition rate is kept unchanged; the nickel net material loaded with the porous ferro-nickel alloy deposition layer is obtained; cleaning and drying; carrying out fast firing treatment by using a high-temperature furnace to improve the stability of the catalyst layer; in a two-electrode system, prepared hydrochloric acid is used as an etching solution, the obtained electrode is used as a working electrode, a platinum sheet is used as a counter electrode, constant-current etching is carried out, it is guaranteed that the etching rate is kept unchanged, and an etched porous electrode finished product is obtained. Compared with the prior art, the problems that a traditional porous electrode is insufficient in catalytic area and poor in surface bubble removal structure are solved; the preparation method is suitable for industrial large-scale production, simple in preparation process, good in repeatability and stability and low in cost.

The invention provides a preparation method of a solar cell, and the method comprises the steps: forming a first transition layer, a first conductive amorphous silicon layer and a first protection layer on the front surface of a substrate in a patterning manner, and forming a front surface passivation contact structure which is locally passivated; depositing a second protection layer on the front passivation contact structure and the residual area on the front of the substrate at the same time, and removing the second protection layer plated on the back side in a winding manner; depositing a second transition layer, a second conductive amorphous silicon layer and a third protective layer on the back surface of the substrate from which the second protective layer is removed; forming a water film on the third protective layer on the back surface of the substrate; removing the second conductive amorphous silicon layer and the third protection layer which are arranged on the side surface and are plated on the front surface in a winding manner under the condition that the third protection layer on the back surface of the substrate has water film protection; and further removing the second transition layer wound and plated on the front surface and the second protection layer on the front surface by adopting a cleaning process. According to the technical scheme, the photoelectric conversion efficiency of the cell is improved, and the high efficiency and reliability of the manufacturing process are ensured.

The invention belongs to the technical field of photocatalysis, and particularly relates to a graphite-phase carbon nitride photocatalyst based on a nitrogen-defect sulfur-doped coupled S-type homojunction as well as a preparation method and application of the graphite-phase carbon nitride photocatalyst. N-defect g-C3N4 (NA-DCN) and S-doped g-C3N4 (NA-SCN) are respectively constructed through nitric acid assisted treatment, and directed migration of photon-generated carriers is realized by using an S-type homojunction interface so as to inhibit recombination; stable interface bonding is formed through component proportion optimization, and the specific surface area and the number of active sites of the material are synchronously increased. Finally, through multi-dimensional structure regulation and control, the problems that the g-C3N4 is limited in photoresponse range, fast in carrier recombination and difficult in consideration of catalytic activity and stability are synchronously solved, the photocatalytic hydrogen production performance of the g-C3N4 is remarkably enhanced, and a reliable technical scheme is provided for large-scale application of an efficient carbon nitride-based photocatalytic material.

The utility model discloses an electronic connecting line for preventing misinsertion, which relates to the technical field of electronic connecting lines and comprises a connecting end and a plugging end, one side of the connecting end is connected with the plugging end, one side of the plugging end far away from the connecting end is provided with an interface assembly, and the left side and the right side of the connecting end are symmetrically provided with fixing structures. According to the electronic connecting wire capable of preventing offset insertion and wrong insertion, the connecting block is arranged in the butt joint plug, and structures matched with the connecting block are arranged on the two sides of the interior of the inner socket in a matched mode, so that when the insertion end is horizontally inserted into the interface assembly, the situations of wrong insertion and offset can be effectively avoided; meanwhile, the fixing structures on the two sides of the connecting end are matched with the structures of the connecting blocks arranged on the two sides of the inner inserting opening, so that structural buckling is completed, structural looseness after the inserting end and the interface assembly are in butt joint can be prevented to a certain extent, and the structural stability is ensured.

The invention belongs to the technical field of solid-phase heavy metal treatment, and particularly relates to a sodium hydroxide modified biochar composite material as well as a preparation method and application thereof. Comprising the following steps: cutting an agricultural waste material into pieces, cleaning, drying, sealing, standing, introducing an inert atmosphere, carrying out a pyrolytic reaction, cooling, grinding, and sieving to obtain a biochar crude product; mixing the biochar crude product with a sodium hydroxide solution, oscillating, filtering to remove liquid and leave a solid, cleaning the solid until filtrate is neutral, and drying to obtain a sodium hydroxide modified biochar composite material; wherein the solid-to-liquid ratio of the biochar crude product to the sodium hydroxide solution is 1g: (5-10) mL; the concentration of the sodium hydroxide solution is 1.0-4.0 mol / L; the sodium hydroxide modified charcoal composite material can be used for adsorbing and passivating heavy metals (Cd, Pb, Cr and As) in a compost system, and has the advantages of low cost, good effect, high operability, no secondary pollution, environment beautification and the like.

The invention discloses a pig iron analysis sample drilling method which comprises the following steps: respectively processing an upper plane and a lower plane which are parallel to each other on the upper surface and the lower surface of a pig iron, drilling a sampling hole in the upper plane and / or the lower plane through a drill bit, taking out scrap iron, and taking the scrap iron as a component detection sample. According to the pig iron analysis sample drilling method provided by the invention, the sample preparation efficiency is improved, the sample preparation cost is reduced, and the accuracy and stability of a detection result are improved.

The invention relates to the technical field of fabrics, and discloses a method for preparing an antibacterial and compliant fabric. The invention uses p-aminostyrene, dicyandiamide, didodecylamine and the like as raw materials, and undergoes a series of reactions to obtain an intermediate 2. The amino group contained in chitosan is subjected to an amidation reaction with 4-chlorobutyric acid under the catalysis of EDC to obtain chlorinated chitosan. The chitosan and the intermediate 2 are subjected to a quaternization reaction, and modified chitosan is obtained under the acidification of hydrochloric acid, thereby obtaining modified chitosan fiber. Finally, the chitosan and cotton fiber are blended into yarn to obtain an antibacterial and compliant fabric. The invention has the advantages that the chitosan structure, the quaternary ammonium salt structure and the guanidine hydrochloride structure are all antibacterial structures, so that the prepared fabric has better antibacterial performance. Meanwhile, the modified chitosan can form a lipid film on the surface of the chitosan, so that the fabric has better compliant performance, and the comfort level of the fabric is further improved.

The invention provides a method for preparing porous ceramic through sol modified SiC particle photocuring, which comprises the following steps: forming a layer of uniform SiO2 coating on the surface of the SiC particle through sol treatment, then preparing the modified SiC particle into photocuring printing slurry, using the photocuring printing slurry to manufacture a SiC green body with a complex shape, and finally preparing the porous SiC ceramic through degreasing and sintering processes. And the SiO2 coating not only can improve the photocuring printing performance of the SiC particles, but also effectively prevents Al and SiC from directly reacting to generate a harmful phase Al4C3 in the subsequent metal infiltration process. The method is simple in process, controllable in parameter, stable and reliable, the obtained porous SiC ceramic has a continuous three-dimensional pore structure, the pore structure and the size are suitable for aluminum melt flowing and complete filling, and the porous SiC ceramic can be used for preparing a high-fraction SiC / Al composite material with a complex structure and has good application prospects. And the application of the photocuring printing technology in the fields of deep-color ceramic printing and complex-structure SiC / metal composite material manufacturing is expected to be widened.

The application discloses a preparation method and a preparation system for high-dispersion silicon dioxide for winter tires, and comprises the following steps: S1: solid sodium silicate is put into a static autoclave, steam is added to pressurize to 0.8-1.0 MPa and pressure is kept for 2 hours to obtain concentrated water glass; S2: the concentrated water glass is added with water to prepare a sodium silicate solution with a silicon dioxide content of 20-25 wt%, the sodium silicate solution is statically stored in a storage tank for more than 10 days, and then filtration is performed; and S3: sucrose fatty acid ester and concentrated sulfuric acid with a mass concentration of 98% are added into the sodium silicate solution, and the mixture is reserved after reaction. The silicon dioxide prepared by the application is specially used for winter tires, has high dispersion, uniform particles and good surface structure, can endow the winter tires with more excellent comprehensive performance, and sucrose fatty acid ester is added as a reaction regulator, so that the product has more excellent structural performance.