182 results about "Silica nanoparticle" patented technology

Methods and compositions including a CO2 foam treatment fluid having a plurality of functionalized silanol group silica nanoparticles the silanol group selected from the group consisting of an isolated silanol group, a vicinal silanol group, a geminaol silanol group, and any combination thereof; and a surfactant. The CO2 foam treatment fluids can be used for stimulation of subterranean formations for hydrocarbon production.

The invention relates to the technical field of high polymer materials, in particular to a corrosion-resistant cable sheath material and a preparation method thereof. The sheath material is prepared by taking an ethylene-octylene copolymer as a matrix and compounding functional fillers such as an aminated magnesium ion exchange A type molecular sieve, dopamine shell silicon dioxide nanoparticles and phenylboronic acid / octadecyl double-grafted silicon dioxide nanoparticles. Wherein the aminated Mg-A molecular sieve is used for efficiently capturing and fixing chloride ions through an ion-dipole effect and a hydrogen bond network; the dopamine shell layer silicon dioxide enhances the interface bonding strength through dual active groups of catechol and amido; phenylboronic acid / octadecyl double-grafted silicon dioxide constructs a dynamic boric acid ester cross-linked network and a hydrophobic barrier, and synergistic protection of crack self-healing and moisture barrier is achieved. The sheath material remarkably improves the long-term corrosion resistance and mechanical stability of the cable in a severe environment.

The application discloses iron oxide coated silica core-shell nanoparticles and a preparation method and application thereof. The iron oxide coated silica core-shell nanoparticles comprise silica nanoparticles as an inner core and iron oxide nanoparticles as an outer shell coated on the inner core surface of the silica nanoparticles; the particle size is 22-112 nm; and the particle uniformity is 0.08-0.3. The preparation method of the iron coated silica nanoparticles provided by the application adopts the measure of adjusting the pH of slurry for multiple times, avoids the agglomeration of nanoparticles in a solution near the isoelectric point, and is thus favorable for finally obtaining core-shell nanoparticles with uniform monodispersity. No surfactant is used in the preparation process, and there is no complicated post-treatment process, thereby reducing the production cost. The uniformly monodispersed nanoparticles prepared by the method have great potential in the field of chemical mechanical polishing.

A method for improving drug solubility and a drug composite material having improved solubility. The method comprises preparing a silica colloidal suspension from silica nanoparticles having a diameter between 2 nm and 100 nm; rapidly evaporating a solvent by means of controlling the temperature and pressure, so as to obtain a porous surface material with ultra-high density silanol groups retained on the surface; and loading drug molecules. By controlling the size of nanoparticles and the density of silanol groups, drug molecules can be effectively adsorbed under anhydrous conditions, and rapidly desorbed and released in an aqueous environment.

A nanoparticle-well treatment additive complex comprising an amine functionalized silica nanoparticle, and a well treatment additive, where the well treatment additive is releasably attached to an amine group of the amine functionalized silica nanoparticle is disclosed. Methods of using the amine functionalized silica nanoparticle is also disclosed.

This invention discloses a method for preparing a core-shell microneedle patch loaded with dual nanoparticles, comprising: preparing silica nanoparticles loaded with oxyhemoglobin and dihydroporphyrin e6; preparing calcium carbonate nanoparticles loaded with aPD-1 antibody; dispersing the silica nanoparticles loaded with oxyhemoglobin and dihydroporphyrin e6 in a polyvinyl alcohol solution to prepare the shell structure of the microneedles; preparing a polymer hydrogel; dispersing the calcium carbonate nanoparticles loaded with aPD-1 antibody in the polymer hydrogel to prepare the core structure of the microneedles; and casting the polyvinyl alcohol solution onto the backing of the microneedles to finally obtain the core-shell microneedle patch loaded with dual nanoparticles. The core-shell microneedle patch loaded with dual nanoparticles prepared by this invention can deliver nanoparticles to the tumor site, where the nanoparticles respond to the tumor microenvironment and activate the body's own immune system, thereby achieving a therapeutic effect on tumors.

The invention discloses a rare earth element modified nickel-based nano-catalyst and a preparation method and application thereof.The rare earth element modified nickel-based nano-catalyst comprises a carrier and an active component loaded on the carrier, and the carrier is cerium dioxide and yttrium oxide co-doped three-dimensional ordered silicon dioxide nanoparticles; the active component is metal nickel. The application refers to the application of the catalyst in preparation of synthesis gas through carbon dioxide methane reforming. According to the invention, rare earth element doped and modified three-dimensional ordered silicon dioxide nanoparticles are used as a carrier, nickel metal is loaded on the nanoparticles, and the problem of carbon deposition can be effectively reduced by adjusting the interaction of alkaline sites and oxygen vacancies on the surface of the catalyst and the metal carrier. The method provided by the invention is helpful for realizing industrialization of a carbon dioxide methane catalytic reforming reaction, realizing a carbon emission reduction target and solving a green electricity energy storage problem.

The application discloses a carboxyl modified nano oil displacement agent which is composed of a nano silicon dioxide skeleton and a functional group connected to the nano silicon dioxide skeleton, wherein the functional group is -RCOOM, R is CH2 or C2H4, and M is one of Li, K and Na. The application also discloses a preparation method of the carboxyl modified nano oil displacement agent, which comprises the following steps: (1) preparing a hydroxyl silicon dioxide nanoparticle dispersion liquid; (2) preparing an amino modified nano silicon dioxide solution, and obtaining amino modified nano silicon dioxide particles after first post-treatment; and (3) dispersing the amino modified nano silicon dioxide particles in water, adding a halogen acetic acid monovalent salt, and then performing reaction and second post-treatment to obtain the carboxyl modified nano oil displacement agent. The oil displacement system is composed of the carboxyl modified nano oil displacement agent, a polymer, a surfactant and water, wherein the carboxyl modified nano oil displacement agent accounts for 0.05-0.3%, the polymer accounts for 0.1-0.3%, the surfactant accounts for 0.1-1%, and the rest is water.

The invention discloses a porous breathable waterproof automobile tarpaulin material and a preparation method thereof.The preparation method comprises the steps that a polyester fiber membrane is modified through dopamine hydrochloride, the surface tension of a water solvent is regulated and controlled through a surfactant, so that a silicon dioxide precursor is dissolved and dispersed, and silicon dioxide nanoparticles grow on the surface of the modified polyester fiber membrane in situ; then adding a low-surface-energy modifier, namely super-hydrophobic silicon dioxide nanoparticles; and finally, drying the treated polyester fiber film in a heating environment and decomposing the surfactant to obtain the waterproof automobile tarpaulin material with the porous structure. According to the automobile tarpaulin, the porous structure of the polyester fiber film is kept, meanwhile, the waterproof performance is achieved, the automobile tarpaulin has the protection function and the air permeability, the problem that the quality of transported goods is reduced due to the fact that the tarpaulin is shielded is solved, and the application range of the automobile tarpaulin is widened. The waterproof material is synthesized and prepared by using water as a solvent, and the problems of flammable and explosive risks and environmental pollution caused by the use of an organic solvent are avoided.

The invention provides a preparation method and application of a ph response type raspberry-shaped nanoparticle emulsifier. Silicon dioxide nano-particles are subjected to surface modification, polystyrene is wrapped to form raspberry-shaped particles, and the surfaces of the silicon dioxide nano-particles are modified with ph response groups. The nano-particles modified by the pH response group can effectively emulsify and stabilize an oil-water system. The method has the advantages of easily available raw materials, low cost, simplicity and convenience in operation, good stability of the obtained emulsion and the like, and has a considerable application prospect in the field of emulsifiers.

The invention relates to a synthesis method and application of a double-layer thermochromic deformation hydrogel, according to the double-layer thermochromic deformation hydrogel, CMC is adopted to perform mechanical enhancement on original PNIPAm, LAP is adopted to perform photo-initiation on a monomer, and the price of CMC and LAP is far lower than that of functionalized silicon dioxide nanoparticles and AIBA in the prior art under the same usage amount. Meanwhile, drugs used in the process are free of volatility and corrosivity, and the safety degree is higher than that of acrylic monomers used in the prior art. Besides, the use temperature of a hydrogel device in the prior art is 60 DEG C and is high, while the double-layer temperature-sensitive hydrogel in the invention can be curled only at 40 DEG C, so that the hydrogel has more advantages in temperature. By adding CMC, the volume change of the hydrogel in the heating process is remarkably reduced, meanwhile, the mechanical property of the hydrogel is greatly improved, the mechanical property of the hydrogel is further improved through impregnation of zirconium ions, and the hydrogel has a wider application scene.

A process to remove H2S from a stream is described and claimed. The process comprises the steps of adding an amine-functionalized silica nanoparticle composition, and optionally a iriazine. The stream is selected from the group consisting of Oil streams, Gas streams, CO2 point source purification streams and Geothermal Energy System streams.

This invention relates to a high-temperature resistant industrial coating and its preparation method. The method includes: amylating Fe3O4 nanoparticles; grafting the amylated Fe3O4 nanoparticles with polybenzimidazole to obtain PBI-g-Fe3O4 composite particles; in-situ growing MOF to form polyMOF; and surface modification with a hydrophilic silane coupling agent to obtain a hydrophilic modified polyMOF; simultaneously, co-grafting silica nanoparticles with an aminosilane coupling agent and a long-chain alkylsilane coupling agent to obtain a synergist; finally, dispersing all components in an aqueous polyester resin varnish to prepare a composite coating. This invention achieves stable dispersion and strong interfacial bonding of polyMOF in aqueous polyester through a multi-level chemical bonding structure. The synergist synergistically provides curing and defoaming effects. The resulting coating exhibits grade 0 adhesion, excellent defoaming performance, a pencil hardness of 3H, and a temperature resistance limit of 640℃, showing broad application prospects in the field of high-temperature protection.

The invention discloses a reinforcing and protecting material for paper cultural relics and application of the reinforcing and protecting material. According to super-hydrophobic treatment liquid, silicon dioxide nanoparticles are modified through a silane coupling agent and a perfluoroalkyl trialkoxysilane coupling agent, an extremely low surface energy layer is constructed, and water is effectively prevented; the reinforcing treatment liquid adopts cellulose derivatives to form a hydrogen bond network with paper cellulose, so that the mechanical strength is remarkably improved. The hydrophobic property and the mechanical property are kept stable after dry-heat and damp-heat accelerated aging, and long-term preservation of cultural relics is facilitated. The design of the coating follows the principle of reversibility, the super-hydrophobic layer and the reinforcing layer are microcosmically firm and macroscopically integrally stripped, the super-hydrophobic layer and the reinforcing layer can be removed in a lossless mode through absolute ethyl alcohol and other mild solvents, the surface of the paper is restored to be close to the state before treatment, and a base material is not damaged or the appearance of the base material is not changed.

The invention relates to the technical field of biomedicine, in particular to a preparation method of sequential targeting mesoporous manganese oxide nano-enzyme and application of the sequential targeting mesoporous manganese oxide nano-enzyme in treatment of ischemia reperfusion induced acute kidney injury. Adding a potassium permanganate solution into the silicon dioxide nanoparticle dispersion liquid under ultrasonic waves, and carrying out alkali etching to obtain mesoporous manganese oxide nanoparticles (HMN); and after surface amination modification, connecting with a mixed PEG spacer layer, and reacting with thiolated SS31 and azidoacyl hyaluronic acid to obtain the nano-enzyme. The preparation can effectively penetrate through a damaged glomerulus filtration barrier and is passively enriched in a damaged kidney, damaged renal tubular epithelial cells over-express CD44 receptor mediated hyaluronic acid modified nano-particle endocytosis is enhanced, SS31 modified nano-particles achieve lysosome escape mitochondrial targeting in cells, the level of active oxygen in mitochondria can be reduced, and the activity of the mitochondria can be improved. The mitochondrial function is recovered, the renal function and tissue pathological injury are improved, and accurate anti-oxidation treatment on the acute kidney injury is realized.

The invention provides a Janus nanofiber membrane with hydrophobic / hydrophilic asymmetric wettability and a preparation method of the Janus nanofiber membrane. Silicon dioxide nanoparticles are formed on a polyurethane fiber membrane in situ, polyurethane electrostatic spinning is carried out by taking the silicon dioxide nanoparticles as a receiving substrate, and a hydrophobic polyurethane nanofiber layer is formed. The Janus nanofiber membrane has the advantages that the humidity regulation and control performance and the temperature regulation and control performance of the Janus nanofiber membrane are synergistically improved, the one-way water delivery capacity is achieved, the sunlight reflectivity and the intermediate infrared emissivity are greatly improved, the passive radiation cooling performance is good, the fiber orientation is regulated and controlled, the heat and humidity regulation and control performance, the sunlight reflectivity and the intermediate infrared emissivity of the Janus nanofiber membrane can be further improved, and the application prospect is wide. Therefore, the heat-insulating fabric can be applied to various application places.

The application discloses a kind of transparent anti-fog composite coating and its preparation method and application, belong to coating material technical field.The application is prepared with deionized water as solvent, respectively, and the mixture of two is obtained SiO2 / PAA anti-fog transparent composite coating with silica nanoparticle dispersion liquid and polyacrylic acid solution;Subsequently, substrate is cleaned, dried and is treated by plasma surface activation, and coating is added to the surface of pretreated substrate after using blade coating film, finally, transparent anti-fog composite coating is obtained in hot curing in air drying oven.The transparent anti-fog composite coating prepared by the application has good anti-fog performance, the average transmittance of visible light (380~750 nm) reaches 92%, has good durability and self-repairing function.The coating and its coated product can be applied in medical devices, optical devices, building and automotive glass and other fields.

The application discloses silica nano composite fertilizer, a preparation method and application thereof, and belongs to the field of nanobiotechnology. The silica nano composite fertilizer is prepared by taking modified dendritic mesoporous silica as a carrier and loading ionic compounds. The silica nanoparticles prepared by the application have excellent nanometer size, and the formed nano organic fertilizer can better help the transportation of element ions in plants. After modification, the loading and penetration guiding effect of the silica nanoparticles is improved, so that the yield and quality of vegetables are improved, the transportation performance of various elements in the vegetables is improved, and the utilization rate of element fertilizers is improved.

The application provides a catalyst and a preparation method and application thereof, relates to the technical field of catalysts, and comprises the following steps: (1) dispersing carbon nanospheres in a solvent, then adding tetrabutyl titanate and an ethanol aqueous solution, uniformly mixing, obtaining titanium dioxide coated carbon nanospheres, and through calcination, obtaining titanium dioxide hollow spheres; (2) dispersing the titanium dioxide hollow spheres in a solvent, adding silica nanoparticles, uniformly mixing, obtaining silica coated hollow spheres, and through calcination, obtaining a carrier; (3) immersing the carrier in a mixed solution containing chloroplatinic acid and nickel nitrate, obtaining a precursor solution; after the precursor solution is sequentially subjected to filtration, drying and a reduction reaction, the catalyst is obtained; and the mass ratio of Pt to Ni in the mixed solution is (1-2):(1-2). The catalyst provided by the scheme can reduce the cracking temperature in the cracking process of polysilane, further shorten the reaction time, and has low catalyst cost and good stability.

The application provides a fluorescent structural color anti-counterfeiting material and a preparation method thereof, and the preparation method comprises the following steps: preparing composite fluorescent particles of mesoporous silica microsphere loaded halogen perovskite fluorescent particles CsPbX3, wherein X is Br, Cl or I; mixing the composite fluorescent particles with monodisperse silica nanoparticles, resin, a solvent, an initiator and an additive to obtain a mixture, wherein the volume percentage of each component in the mixture is as follows: 25-65% of the nanoparticles, 35-75% of the resin, 0.01-10% of the initiator, and 5-90% of the solvent, and the mass of the composite fluorescent particles is 0.01-3% of the mass of the silica nanoparticles; performing rotary evaporation on the mixture under vacuum to obtain concentrated paint, and after photocuring or thermal curing, the anti-counterfeiting material is obtained. The anti-counterfeiting material of the technical scheme has the dual anti-counterfeiting effects of structural color anti-counterfeiting under natural light and fluorescent anti-counterfeiting under ultraviolet excitation.

The invention discloses a preparation method of silicon dioxide-gold core-shell nanoparticles, and belongs to the field of nano material preparation. The method comprises the following steps: preparing aminated silicon dioxide nanoparticles; preparing small gold nanocrystal seeds and adsorbing the small gold nanocrystal seeds on the surface of silicon dioxide; ascorbic acid or a salt thereof is used as a weak reducing agent, a chloroauric acid solution is slowly added, uniform growth of a gold shell is induced on the surface of a gold seed, and finally a complete core-shell structure is formed. According to the method, surface modification and adsorption are optimized, a weak reduction growth system is adopted, and growth kinetics is accurately controlled, so that the problems of uneven gold shell coating, complex process and poor reproducibility in a traditional method are effectively solved. The nanoparticles prepared by the method have the advantages of complete and smooth gold shell, accurate and controllable thickness (5-50nm), adjustable plasma resonance absorption, good monodispersity and the like, and have important application value in the fields of biomedicine and photoelectricity.

The invention discloses double-mesoporous silica nanoparticles for modifying ionizable amino and a preparation method and application of the double-mesoporous silica nanoparticles. The core technical process of the double-mesoporous silica nanoparticles comprises the following steps: firstly, synthesizing mesoporous silica through a double-template method of a block copolymer and a surfactant; then grafting ionizable amino to the surface of the mesoporous silica through a silane coupling agent; and finally, RNA is loaded on the modified mesoporous silica by electrostatic adsorption, and efficient tumor treatment is finally realized. The invention also discloses an application of the silicon dioxide nanoparticles in RNA delivery. The silicon dioxide nanoparticles prepared according to the method disclosed by the invention have high RNA loading efficiency and cell uptake efficiency. The double-mesoporous silica nanoparticles modified with ionizable amino groups have the advantages of large drug loading capacity, high cell uptake rate, high biocompatibility, simplicity in synthesis, mild reaction conditions, convenience in cutting and the like, and have a good application prospect.

The invention relates to aramid nanofiber reinforced silicon dioxide composite aerogel and a preparation method thereof. The method comprises the following steps: preparing aramid nano-fibers into dispersion liquid by adopting a mixed solution containing dimethyl sulfoxide and isopropanol; adding basalt nanosheets and methyltrimethoxysilane into the dispersion liquid, and uniformly mixing the basalt nanosheets and the methyltrimethoxysilane to obtain mixed sol; putting the mixed sol into a mold, sealing the mold by adopting a polytetrafluoroethylene film with micropores, then putting the mold into a low-concentration acetic acid aqueous solution for gelling, aging at room temperature, and then putting the mold into a high-concentration acetic acid aqueous solution for high-temperature aging to obtain high-temperature aged gel; the high-temperature aging gel is sequentially subjected to solvent replacement and supercritical drying, and the aramid nanofiber reinforced silicon dioxide composite aerogel is prepared. According to the preparation method, the composite aerogel assembled by aramid nanofibers, basalt nanosheets and silicon dioxide nanoparticles is prepared, and synergistic improvement of mechanical and thermal properties of the composite aerogel material is finally realized through pore size regulation and control and a multi-dimensional assembly strategy.

The invention discloses a super-hydrophobic-super-lipophilic metal-based SiO2-PDMS-FEVE separation mesh and a preparation method and application thereof.The method comprises the steps that a stainless steel mesh is cleaned and dried to serve as a substrate, PDMS and FEVE are dissolved in butyl acetate according to the volume ratio to prepare a composite resin solution, silicon dioxide nanoparticles are added for modification, PDMS and FEVE curing agents are added to prepare a hydrophobic modified solution, the hydrophobic modified solution is subjected to ultrasonic treatment, and the super-hydrophobic-super-lipophilic metal-based SiO2-PDMS-FEVE separation mesh is obtained. And spraying a substrate and then carrying out stepped high-temperature curing to obtain a finished product. The solution ratio provided by the invention can improve the oil-water separation effect, the raw materials are common and low in cost, the large-batch processing requirement is met, and the industrial application threshold is reduced; the finished product can efficiently separate various oil-water mixtures of ships, is adaptive to oil liquids with different viscosities, and is high in separation speed; the performance is not obviously attenuated after being recycled, and the composite material has excellent mechanical stability, chemical stability and self-cleaning function, can be stably applied in a complex ship environment for a long time, and meets the requirements of ship oily sewage treatment and oil spill treatment.

The invention relates to a composite liquid armor based on pure silica nanoparticles derived from sea sand and its production method. In our invention, composite liquid armor can be utilized in both military and civilian defense industries. Alongside its durability, the armor offers high performance, enables ease of movement, and features a lightweight, free-particle modular structure. By providing a domestic alternative, it reduces dependency on foreign technologies in this field.

1. A method for reducing the amount of HS in a liquid or gas stream, the method comprising: a) operating an industrial process having HS in a liquid or gas stream, or in both the liquid and gas streams associated with the industrial process, the industrial process comprising connecting pipes that allow liquids and gases to move from one location to another within the process; b) injecting a silica nanoparticle mixture into a liquid or gas stream, or in both the liquid and gas streams associated with the industrial process, the silica nanoparticle mixture being in a colloidal or dry state; and c) providing a material in the silica nanoparticle mixture to react with the HS to result in a reduction of HS in the liquid or gas product fluid. In certain embodiments, the silica nanoparticle mixture comprises silica nanoparticles, with or without a surface treatment, and one or more chemicals selected from the group consisting of triazines, alcohols, polyols, ketones, aldehydes, and hemiacetals.

A display device includes: a display panel configured to fold along a folding axis; and a protective member disposed on the display panel, wherein the protective member includes: a protective base layer; a hard coating layer including a polymer derived from a coating composition, wherein the hard coating layer is disposed on the protective base layer; and an antireflection layer including a high refractive index layer and a low refractive index layer disposed on the high refractive index layer, wherein the antireflection layer is disposed on the hard coating layer, wherein the coating composition includes a silsesquioxane-based resin, an oxetane-based resin, a photopolymerization initiator, and silica nanoparticles, and wherein a first weight of the silica nanoparticles is about 3 wt % to about 5 wt % based on a total weight of the coating composition.

The utility model relates to the technical field of PC plates, in particular to a PC sunlight plate with an anti-dazzle function. According to the technical scheme, the utility model relates to the PC sunlight plate with the anti-dazzle function, and belongs to the technical field of PC plates. According to the technical scheme, the device comprises a hollow honeycomb layer, a gradient refractive index composite layer and a microprism array. The honeycomb axis of the hollow honeycomb layer and the substrate form an inclination angle of 15 degrees, and the inner wall is coated with the titanium dioxide scattering layer, so that light rays can be effectively scattered, glare is reduced, and heat is insulated. The gradient refractive index composite layer is composed of an outer PC base material plate containing a benzotriazole UV absorbent, a middle PC base material plate doped with silicon dioxide nanoparticles in a gradient mode and an inner antistatic modified PC base material plate, and the gradient refractive index composite layer has the anti-ultraviolet function and the anti-static function. And microprism arrays with the height of 0.2 mm and the spacing of 0.5 mm are uniformly distributed on the PC board, so that the anti-dazzle effect is further optimized. According to the utility model, through cooperative operation of all the structures, excellent anti-dazzle, heat insulation, ultraviolet resistance, stable structure and other characteristics are realized.

This invention relates to the field of superhydrophobic composite coating technology, and discloses a method for preparing a SiO2-based bicovalent network superhydrophobic composite coating. This method uses tetraethoxysilane to synthesize silica nanoparticles to construct surface roughness, and utilizes the long fluorocarbon chain of perfluorooctyltriethoxysilane (POTS) to modify it with low surface energy. A silane coupling agent and aluminum nitrate are introduced to generate a Si-O-Si covalent network as molecular bridges and an Al-O-Al covalent network as a framework, respectively. An epoxy resin (EP) is used as a bonding layer to adhere the coating to a substrate. The SiO2-based bicovalent network superhydrophobic composite coating prepared by this method exhibits excellent superhydrophobicity, mechanical stability, chemical stability, and thermal stability, providing a simple manufacturing strategy for the industrial application of superhydrophobic materials.

The invention relates to the technical field of metal processing, and discloses a three-dimensional metal trademark manufacturing process which comprises the following steps: preparing a coating composition from the following raw materials: modified silicon dioxide nanoparticles, oxidized polyethlene wax emulsion and alkali-soluble acrylic resin emulsion; an aluminum alloy base material is selected, the back face of the aluminum alloy base material is milled to be thin, the front face is subjected to anodic oxidation and hole sealing treatment, and a coating composition is coated to form a protective coating; stamping forming is carried out, extrusion stamping is carried out through cooperation of corner heightening convex points of an upper die punch and corner deepening concave pits of a forming insert, and the base material is forced to plastically flow to fill character grooves; after forming, a top coating and surface metal are removed through CNC cutting, metal three-dimensional characters are reserved, and the remaining coating is cleaned and removed through a weak alkaline solution. The stress dispersion and lubrication performance of the coating is utilized, brittle cracking and whitening of the anodic oxide film in the stamping process are effectively prevented, and the three-dimensional metal trademark with the sharp contour, the complete side face oxidation and the highlight top face is obtained in cooperation with the cutting technology.