78 results about "Silicon fluoride" patented technology

The invention relates to the technical field of industrial solid waste resource utilization, and particularly discloses a fluorine-containing silicon slag recycling process which comprises five steps of fluorine-containing silicon slag raw material pretreatment, acid leaching fluorine extraction, ammonium fluosilicate preparation, nanometer silica gel purification and wastewater recycling. Fluorine in the fluorine-containing silicon slag is converted into ammonium fluosilicate solid to be recycled, fluorine in the fluorine-containing silicon slag is converted into sodium silicate to be manufactured into nano silica gel to be recycled, only feeding reaction is needed in the whole process, then filtering is conducted, the technological process is simple, and the treatment efficiency of the fluorine-containing silicon slag is improved. 0.3 ton of ammonium fluosilicate (the market price is 8000 yuan / ton) and 0.2 ton of nano silica gel (the market price is 15000 yuan / ton) can be produced from each ton of fluorine-containing silicon slag, and huge economic value can be brought to factories.

The invention discloses a graphene-based high-strength heat-conducting film and a preparation method thereof, belongs to the technical field of heat-conducting film preparation, and aims to solve the technical problem that the strength and corrosion resistance of a heat-conducting film in the prior art need to be further improved. Graphene-aromatic phosphonate heat-conducting resin, maleic anhydride grafted fluorinated polyether-ether-ketone and fluorinated siloxane elastomer are jointly applied to membrane material preparation, so that the material forms a system with a continuous structure in the aspects of heat-conducting framework construction, interface connection and deformation slow release, the graphene-aromatic phosphonate heat-conducting resin provides a high-efficiency heat-conducting path, the maleic anhydride grafted fluorinated polyether-ether-ketone realizes stable interface bonding, and the fluorinated siloxane elastomer endows the membrane material with a structure retention capability under an external force and a medium environment. The obtained high-strength heat-conducting film has relatively high heat conductivity coefficient, strength and quality stability in an acid-base environment, and shows excellent comprehensive performance.

The invention belongs to the field of inorganic chemical industry, and particularly relates to a method and a system for efficiently utilizing a phosphate fertilizer byproduct, the method comprises the following steps: carrying out acidolysis on fluosilicic acid with the concentration of more than or equal to 45% wt and concentrated sulfuric acid to generate a mixed solution of silicon tetrafluoride gas and fluorosulfonic acid; the mass ratio of the fluosilicic acid to the concentrated sulfuric acid is controlled to be 1: (4-15); pyrolyzing the obtained fluorosulfonic acid to generate dilute sulphuric acid, hydrogen fluoride and water vapor, forming 98% concentrated sulphuric acid from part of dilute sulphuric acid and fuming sulphuric acid, drying hydrogen fluoride to obtain crude hydrogen fluoride gas, and condensing and rectifying to obtain anhydrous hydrogen fluoride; the rest dilute sulphuric acid is partially compounded and then returned for acidolysis, and the rest dilute sulphuric acid is used for producing white carbon black and flows back to a wet-process phosphoric acid system; and circularly absorbing the obtained silicon tetrafluoride gas by using secondary concentrated fluosilicic acid to obtain fluosilicic acid with the mass concentration of more than or equal to 45%, recycling the fluosilicic acid for acidolysis reaction, and modifying the concentrated by-product silicon dioxide to obtain the high-activity white carbon black. The problems of energy consumption and cost are solved, and efficient circulation and poly-generation of fluorine and silicon resources are achieved in the whole process.

The utility model discloses a self-extinguishing fluoride silicon oil insulation and aging experiment device, which comprises a container, two electrode assemblies and two locking screws, and is characterized in that the side wall of the container is convexly provided with two oppositely arranged mounting parts; the mounting part is provided with a mounting channel communicated with the interior of the container and a first threaded hole communicated with the mounting channel; the two electrode assemblies are in one-to-one correspondence with the two mounting channels, each electrode assembly is slidably mounted in the corresponding mounting channel, and one end of each electrode assembly extends into the container; the two locking screws are in threaded connection with the two first threaded holes in a one-to-one correspondence mode, so that after the electrode assembly slides to a set position, one end of each locking screw abuts against the electrode assembly to fix the electrode assembly. The electrode assembly is slidably mounted on the side wall of the container, only the electrode assembly needs to be pushed during adjustment, the container does not need to be opened, operation is easy, and use is convenient.

A method for forming a semiconductor device provides a substrate having a patterned structure containing a semiconductor material, wherein the patterned structure has a side profile including depressions, such as a patterned film stack, and a spacer layer conformally deposited on and within the depressions of the patterned structure; and a reaction layer formed on the spacer layer by reacting the surface of the spacer layer with a plasma-excited first etching gas, wherein the plasma-excited first etching gas contains fluorine, hydrogen, and nitrogen to form the reaction layer, and at least a portion of the reaction layer is removed by ion bombardment caused by exposure to a plasma-excited second etching gas. The spacer layer may be SiOCN. The reaction layer may be ammonium silicofluoride. The first etching gas may contain SF6, H2, and N2, or NF3, H2, and N2. The reaction and removal may be carried out at room temperature in the same chamber.

The application relates to a method and a preparation system for preparing hydrogen fluoride from fluosilicic acid, which comprises a reaction kettle, a hydrogen fluoride absorption tower, a condenser and a silicon tetrafluoride absorption tower which are sequentially communicated; a gas outlet of the reaction kettle is communicated with a gas inlet of the hydrogen fluoride absorption tower, and a gas outlet of the hydrogen fluoride absorption tower is communicated with a gas inlet of the condenser; the generated fluorosulfonic acid in the reaction kettle is introduced into a stripping tower, fluorosulfonic acid generated in a side reaction is re-generated into hydrogen fluoride, the generation of intermediate products is reduced, the process route of the application is free of waste residues and waste gas, and fluosilicic acid is effectively utilized.

The invention relates to a system and a method for recovering lead, tin and iron in water-quenched slag based on lead electrolysis of waste silicofluoride acid and secondary lead smelting. The system for recycling lead, tin and iron in the lead electrolysis waste silicofluoride acid and secondary lead smelting water quenching slag comprises a dissolving mechanism and a plurality of separating mechanisms arranged on the outer side of the dissolving mechanism, and the dissolving mechanism comprises a dissolving tank, a stirring assembly arranged in the dissolving tank and a temperature adjusting assembly arranged on the dissolving tank; and after the waste silicofluoride acid and the water-quenched slag are filled into the dissolving tank for reaction, the waste silicofluoride acid and the water-quenched slag are sequentially introduced into each separation mechanism for solid-liquid separation and precipitation reaction. The method for recycling lead, tin and iron in the water-quenched slag based on lead electrolysis of waste silicofluoride acid and secondary lead smelting comprises the following steps of a grinding procedure, a dissolving procedure, a separating procedure and a recycling procedure on the basis of the recycling system. The method solves the problems that solid and liquid waste in existing secondary lead smelting cannot be synergistically recycled, the recycling system and process are complex, the treatment difficulty is large, and the cost is high.

A degassing tower for preparing hydrogen fluoride relates to the field of hydrogen fluoride preparation, and is characterized in that a cylindrical mesh cage (2) is arranged in the middle of an inner cavity of a tower body (1), an auxiliary assembly (5) is arranged below the cylindrical mesh cage (2), a spraying assembly (3) is arranged above the cylindrical mesh cage (2) in the inner cavity of the tower body (1), and a driving assembly (4) is arranged at the top of the spraying assembly (3); according to the invention, the cylindrical mesh cage which can float and is used for more sufficient contact between the to-be-treated gas and the gathered liquid is arranged in the middle of the tower body, and the spraying assembly used for assisting adsorption of substances except hydrogen fluoride is arranged above the cylindrical mesh cage; the top of the spraying assembly is provided with the driving assembly which is used for rotating the spraying assembly to enable the spraying area of the spraying assembly to be more uniform and providing driving force for the auxiliary assembly, so that non-condensable gases such as sulfur dioxide and silicon tetrafluoride in a hydrogen fluoride gas mixture are removed; and the hydrogen fluoride gas is condensed to obtain a qualified anhydrous hydrogen fluoride product.

The application provides a high-voltage and high electrochemical performance electrolyte for a low-temperature lithium ion battery, a preparation method and application thereof, and belongs to the technical field of low-temperature lithium ion batteries.The electrolyte comprises the following components: a lithium salt, a base solvent and a non-solvated cosolvent; the base solvent is one or a combination of two or more of linear siloxanes or nitriles; the non-solvated cosolvent is one or a combination of two or more of fluorinated silanes or stannanes; and the volume ratio of the base solvent and the non-solvated cosolvent is 5-9:1-5.The pseudo-coordination bond between Sn (Si) in the non-solvated cosolvent and O (N) in the base solvent can be used to effectively adjust the solvation structure of the electrolyte, so that high ion conductivity at low temperature is achieved; and the prepared electrolyte is applied to a lithium ion battery, and exhibits excellent high-voltage and long cycle stability and other electrochemical performances at low temperature, so that the electrolyte has a good application prospect.

The invention discloses a two-component high-thermal-conductivity gel and a preparation method thereof, and belongs to the technical field of thermal interface materials, and the key point of the technical scheme is that the two-component high-thermal-conductivity gel comprises a component A and a component B, the component A is prepared from the following raw materials in parts by mass: 90 to 110 parts of phenyl vinyl siloxane, 2 to 4 parts of fluorinated silicon oil, 4.5 to 6 parts of hydrogen-containing silicone oil, 1700 to 1900 parts of heat-conducting filler, 8 to 12 parts of surfactant and 0.1 to 0.3 part of inhibitor; the component B is prepared from the following raw materials in parts by mass: 90 to 110 parts of phenyl vinyl siloxane, 2 to 4 parts of silicon fluoride oil, 1700 to 1900 parts of heat-conducting filler, 8 to 12 parts of surfactant and 1 to 3 parts of catalyst. According to the invention, through crosslinking density control and design of the interface controllable stripping layer, good balance between heat-conducting property and easy stripping property is realized, and the application reliability and the service life of the gel are obviously improved and prolonged.

The invention discloses a high-stability preparation process of an anti-aging silicone oil film, and relates to the technical field of preparation processes of silicone oil films, the anti-aging silicone oil film comprises the following raw materials by weight: 80-90% of silicone oil, 3-5% of a stabilizer, 1-2% of a cross-linking agent, and 5-10% of a solvent. The functional additive is prepared from the following components in percentage by weight: 1-3% of an anti-ultraviolet agent, 0.5-1% of an antioxidant, 1-2% of a nano material, 3-5% of polyurethane resin and 0.5-2% of fluorinated silane, and the stabilizer, the anti-ultraviolet agent, the antioxidant, the nano functional material and the fluorinated silane are synergistically introduced into a silicone oil system, so that systematic improvement of the anti-aging performance of the silicone oil film is realized; the process combination of pre-dispersion stirring, gradual heating crosslinking, deep vacuum degassing, double-layer coating film forming, constant-temperature curing and gradual cooling is adopted, so that the film layer structure is more compact, internal defects are remarkably reduced, and the mechanical strength and environment resistance of the film layer are enhanced.

The utility model discloses an optical lens structure with good stability, which comprises a lens main body, the lens main body comprises a resin matrix, an anti-blue-light layer, an antireflection film layer, a silicon fluoride layer and an anti-fog layer, the resin matrix is arranged at the bottommost position of the lens main body, the anti-blue-light layer is arranged above the resin matrix, the antireflection film layer is arranged above the anti-fog layer, and the anti-fog layer is arranged above the anti-blue-light layer. The anti-reflection film layer is arranged above the anti-blue light layer, the silicon fluoride layer is arranged above the anti-reflection film layer, and the anti-fog layer is arranged above the silicon fluoride layer; the metal film layer is arranged on the outer side of the lens main body; and the silica gel frame is arranged on the outer side of the metal film layer. According to the utility model, the integral structural integrity of the resin lens can be effectively improved, the structure is compact, the lens is prevented from being bent, and the higher definition of the resin lens is ensured.

The invention provides a preparation method of high-performance silicon fluoride aerogel, and relates to the field of aerogel preparation, and the preparation method comprises the following steps: S1, preparing sol: preparing a component A and preparing a component B; the component A is prepared by fully mixing a fluorine-free silicon source, a pre-hydrolyzed fluorine-containing organic silicon source, absolute ethyl alcohol and deionized water, then adding an acid catalyst, adjusting the pH value of the solution to 2.5-4.0, adding a regulator and carrying out constant-temperature hydrolysis; the component B is prepared by uniformly mixing deionized water with an ammonia source to obtain a basic catalyst solution; step S2, gelling; step S3, aging; and S4, performing supercritical drying. According to the method, silicate ester with a fluorocarbon bond is introduced as a carbon source, so that the water resistance of the silicon dioxide aerogel is effectively improved, corrosion of acid-base particles is hindered, and the heat conductivity coefficient of the aerogel is remarkably reduced.

The invention provides a preparation method and application of a modified EP-POSS film, and relates to the field of molecular material synthesis. Comprising the following steps: dissolving KH560 in xylene to obtain a mixed solution 1; isopropanol and a tetramethylammonium hydroxide aqueous solution are mixed and stirred, and a mixed solution 2 is obtained; dropwise adding the mixed solution 1 into the mixed solution 2, stirring, refluxing, distilling, washing, drying and grinding one by one to obtain EP-POSS white powder; the preparation method comprises the following steps: activating a base material, dropwise adding EP-POSS onto the base material, finally preparing a fluorinated silane-toluene solution, and grafting fluorinated silane onto the surface of EP-POSS through a vapor deposition method to obtain the modified EP-POSS film. The contact angle of the prepared modified EP-POSS film is far larger than that of a common EP-POSS material, and the modified EP-POSS film has excellent hydrophobicity, light transmittance and thermal stability. In addition, the invention further provides application of the modified EP-POSS film to the photovoltaic module, the output power of the photovoltaic module can be remarkably improved, and the influence of long-time sunshine and dust covering on the output power of the photovoltaic module is reduced.

The invention provides a preparation method of high-purity lithium sulfide, which comprises the following steps: (1) under the protection of inert atmosphere, mixing and dispersing silicon sulfide and lithium fluoride, transferring into a reactor, heating the material in the reactor to a certain temperature under the inert atmosphere, and keeping the temperature for a certain time for reaction to obtain a lithium sulfide crude product and silicon fluoride gas; and (2) dissolving the lithium sulfide crude product in an organic solvent, filtering to remove insoluble impurities, concentrating, and drying to obtain the high-purity lithium sulfide. The preparation method is simple and efficient, and the prepared lithium sulfide is high in purity.

The invention discloses an ozone oxidation catalyst for casting waste gas treatment and a preparation method thereof, and belongs to the technical field of waste gas treatment. The mordenite is used as a catalyst carrier, the fluorinated silane is loaded on the surface of the mordenite through a reflux liquid phase deposition method to construct a hydrophobic barrier, the modified mordenite is obtained, the ozone decomposition performance of the modified mordenite in a high-humidity environment is remarkably improved, and further in an intermittent micro-negative pressure environment, the ozone decomposition performance of the modified mordenite is improved. A transition metal oxide is loaded on the surface of the modified mordenite to obtain the ozone oxidation catalyst, and through optimization of a preparation process, namely roasting activation and intermittent micro-negative pressure treatment are combined with a proper proportion of metal oxide sol, the number and accessibility of active sites of the catalyst are enhanced, and the ozone catalysis performance of the catalyst is promoted to be further improved. The ozone oxidation catalyst is applied to the treatment of casting waste gas, especially toluene-containing waste gas, and can show efficient, stable and high-adaptability treatment effects under different working conditions.

The invention discloses a preparation method of high-purity silane suitable for a small experimental device, which comprises the following steps: sequentially connecting and arranging a main reactor, a second reactor, a condenser, a silane buffer tank, a booster pump and a silane steel cylinder, and injecting hydrogen, nitrogen and silicon tetrafluoride materials into the main reactor after passing through the same mass flow controller; then the material enters a second reactor through a gas phase outlet pipeline at the top of the main reactor, a gas phase outlet at the top of the second reactor is connected with an inlet at the bottom of a condenser, an outlet of the condenser is connected with a silane buffer tank, and an outlet pipeline is arranged at the top of the silane buffer tank; materials enter the booster pump through the outlet pipeline, are pressurized in the booster pump and then are fed into the silane steel cylinder to be stored, so that the complexity of the reaction device is simplified, the energy consumption is reduced, and the problems of huge device size, complex process conditions and the like are solved.

The application discloses a method for preparing white carbon black and ammonium fluoride from silicon tetrafluoride, wherein the silicon tetrafluoride gas enters an ammoniation reactor through the middle part, the carrier gas and the ammonia gas enter the ammoniation reactor through the bottom part, solid particles SiO2 and NH4F are generated, the carrier gas flows out from the top outlet of the ammoniation reactor and enters a separator, solid slurry is rapidly formed after being washed in the spray at the top inlet of the separator, and then the solid slurry is settled into the separator; inert solvents are added into the separator, and SiO2 and NH4F are separated by using the density difference. The application uses the SiF4 gas obtained by decomposing fluorosilicic acid or the by-product silicon tetrafluoride gas of phosphate fertilizer as raw materials to continuously produce high-quality white carbon black and ammonium fluoride, and the method is continuous, stable, simple, and has a long operation period, and effectively overcomes the defects of the existing intermittent process technology.

This invention relates to a chemical equipment, specifically a silicon tetrafluoride concentrator. The technical solution includes a main gas inlet pipe, characterized in that at least one set of spray cylinder sections are connected in series within the main gas inlet pipe. Each spray cylinder section includes vertical and horizontal sections. The vertical section has gas inlets and outlets at different heights. The gas inlet of the vertical section is connected to the main gas inlet pipe, and the gas outlet of the vertical section is connected to the inlet of the horizontal section. The top of the horizontal section has multiple spray mounting ports, into which spray pipes are inserted. The lower end of each spray pipe is connected to a nozzle, and the upper end is connected to a main liquid pipeline. This invention features simple structure, low equipment height, low investment and operating costs, sufficient gas-liquid contact, good concentration effect, corrosion and wear resistance, convenient maintenance, and stable and reliable operation.

The present invention relates to a pharmaceutical composition comprising a radiohybrid comprising a fluorinated silicon and a chelating group, wherein either the fluorine is 18 F, or the chelating group comprises a chelated radioactive metal, wherein the composition has a pH of 4.0-6.0 and further comprises: 0.1-200 mM citrate buffer; 1-100 mg / mL ethanol; and 5-10 mg / mL sodium chloride.

The utility model provides a multifunctional table top protection pad. The multifunctional table top protection pad comprises an anti-skid layer, a foaming layer, a heating layer and a wear-resistant layer, the anti-skid layer comprises a first surface and an opposite second surface, the foaming layer is located on the first surface of the anti-skid layer, the heating layer is located on the surface of the side, away from the anti-skid layer, of the foaming layer, and the wear-resisting layer is located on the surface of the side, away from the foaming layer, of the heating layer. A hydrophobic and oleophobic antibacterial coating is arranged on the surface of one side, far away from the heating layer, of the wear-resistant layer; wherein the anti-skid layer comprises a TPU film anti-skid layer, and mirror surface embossing is arranged on the second surface of the anti-skid layer; the foaming layer comprises a TPU foaming layer, the heating layer comprises an electric heating layer, the wear-resistant layer comprises a TPU film wear-resistant layer, and the hydrophobic and oleophobic antibacterial coating comprises a silicon fluoride coating. The table top protection pad is anti-slip, soft and comfortable, has a better heat preservation effect while being electrically heated, is environment-friendly, antibacterial and scratch-resistant, and effectively improves table top oil stains.

Embodiments of the present application provide a secondary battery, including: a positive electrode, a negative electrode, and a sulfide solid electrolyte, a molecular formula of the sulfide solid electrolyte being: Li a P 1‑b M b S c O d X e wherein 5

The invention discloses a method for preparing a silicon isotope and a boron isotope. The method comprises the following steps: purifying boron powder through a pretreatment process to obtain high-purity boron powder; vacuumizing the reactor to-0.08 MPa to-0.09 MPa, then introducing inert gas to replace air in the reactor, and carrying out reduction reaction on the high-purity boron powder and the high-purity silicon tetrafluoride gas rich in silicon-28 in the reactor to obtain a crude silicon-28 isotope product; the method comprises the following steps: removing impurities from a crude silicon-28 isotope product through plasma zone melting to obtain a silicon-28 isotope product, removing excessive silicon tetrafluoride from generated boron trifluoride gas through a low-temperature rectification process, preparing boron-10 and boron-11 isotopes, and returning the excessive silicon tetrafluoride to a system for recycling. The one-step coupling preparation technology of the silicon and boron isotopes is developed, the silicon-28 isotopic, the boron-10 isotope and the boron-11 isotope are prepared at the same time, efficient directional conversion of the silicon and boron isotopes is achieved, the production cost is further reduced, and the economic benefits of the process are remarkable.

The application discloses a closed loop process for synchronously increasing the value of silicon and fluorine components in silicon tetrafluoride, and belongs to the technical field of fluorine-containing silicon byproduct resource utilization. The steps are as follows: 1) mixing anhydrous alcohol with triethylamine, and introducing silicon tetrafluoride gas at 0-30 DEG C to generate alkyl orthosilicate and triethylamine monohydrofluoride; 2) distilling the reaction liquid to recover alcohol, performing vacuum rectification to obtain alkyl orthosilicate product, and separating to obtain triethylamine monohydrofluoride; 3) adding triethylamine monohydrofluoride into water, and performing heating reflux reaction with inorganic alkali or basic oxide to separate to obtain triethylamine crude product and fluorinated metal salt; 4) after dehydration rectification, the triethylamine crude product is recycled to step 1) with recovered alcohol; and the fluorinated metal salt is post-treated to obtain high-purity fluorinated metal salt. The process has low reaction temperature, high alkyl orthosilicate yield, recyclable triethylamine, all fluorine solidified into high-value-added products, no three-waste emissions, and can be continuously industrialized.

The application discloses a pavement embedded antiskid marking paint, a preparation process and a construction method, and belongs to the technical field of paint preparation. Firstly, alumina is treated by a solution and calcined to obtain alumina loaded nano zinc oxide powder, then the alumina loaded nano zinc oxide powder is subjected to aminoization pretreatment and reaction with hydrochloric acid dopamine to obtain core-shell type composite powder, and the surface polydopamine shell layer of the core-shell type composite powder can enhance the bonding force with a matrix and buffer stress; POSS and fluorinated siloxane modified waterborne polyurethane are compounded through a polymerization reaction to obtain modified polyurethane with the properties of oil stain resistance, waterproofness, weather resistance, stain resistance and mechanical properties; finally, the modified polyurethane, the core-shell type composite powder, nano titanium dioxide, aggregates and additives are mixed and placed to obtain the pavement embedded antiskid marking paint, and the pavement embedded antiskid marking paint has the properties of high adhesion, weather resistance, wear resistance, antiskid and corrosion resistance.

The invention belongs to the technical field of resource recovery and material preparation, and provides a method for preparing silicon powder by using an out-of-service wind turbine blade. By adopting the method disclosed by the invention, the silicon powder with higher purity and the resin with lower ash content can be recovered from the retired wind turbine blade. The method comprises the following steps that S1, the retired wind power blade is disassembled, and non-glass fiber composite material parts are removed; then crushing into fragments; s2, grinding the fragments; s3, carrying out first-stage reaction on the powder material in a mixed solution of hydrofluoric acid and an organic solution; then carrying out second-stage reaction to generate silicon tetrafluoride gas, and filtering feed liquid after the reaction to obtain solid-phase resin; collecting silicon tetrafluoride gas, introducing the silicon tetrafluoride gas into a weakly alkaline aqueous solution, stirring, and standing to obtain silicic acid precipitate; s4, filtering, washing and calcining the silicic acid precipitate to obtain a silicon powder crude product; and S5, purifying and drying the silicon powder crude product to obtain a silicon powder product.

The present disclosure belongs to the field of carbon material technology, and specifically relates to a method for preparing carbonaceous materials, carbonaceous materials, and applications. A carbonized material formed from biomass materials is sintered at high temperature in a difluorochloromethane atmosphere. During this process, difluorochloromethane decomposes to generate tetrafluoroethylene gas and hydrogen chloride gas, and tetrafluoroethylene generates octafluorocyclobutane, which reacts with silicon dioxide to generate silicon tetrafluoride, carbon dioxide, and carbon; the generated hydrogen chloride gas reacts with metal impurities at high temperatures to generate metal chlorides. The preparation method provided by the present disclosure can remove metal impurities such as iron and calcium while removing silicon dioxide, and does not require acid washing and alkali washing processes, and does not involve waste liquid treatment.

The invention discloses a vertical graphene skeleton confinement silicon fluoride-based composite material as well as a preparation method and application thereof, and belongs to the field of inorganic materials. Putting Si into a tubular furnace, and heating to 1000-1200 DEG C at the speed of 10 DEG C / min in an argon environment; converting the atmosphere into a hydrogen / methane mixture for reaction to generate Si (at) G; then mixing and grinding the Si (at) G and tetrafluoroterephthalic acid, transferring the mixture to a tubular furnace, and finally performing heat treatment in an argon atmosphere to obtain a Si (at) G-F composite material; the composite material is of a core-shell type compact structure, and the surfaces of silicon particles are coated with vertically growing graphene sheets (VGs) in a self-adaptive mode to form a tightly-crosslinked three-dimensional network; dispersed sphere-like particles are formed, and the surfaces of the particles are tightly coated with the corrugated graphene sheet layers; the vertical graphene framework confinement silicon fluoride-based composite material Si (at) G-F composite material disclosed by the invention shows excellent electrochemical performance, and a feasible new way is provided for the development of high-energy-density lithium ion batteries.

The invention provides an aerogel coating for an implant as well as a preparation method and application of the aerogel coating. According to the coating, polyvinyl alcohol with the alcoholysis degree being 98% or above serves as a matrix, a bio-based toughening agent and functional nano materials such as titanium dioxide or carbon nano tubes are compounded, surface hydrophobic modification and chemical crosslinking treatment are conducted through fluorination / silanization, and the coating is prepared through a double drying technology combining freeze drying and supercritical carbon dioxide drying. The porosity of the high-performance coating is higher than 90%, and the high-performance coating is of a bionic three-dimensional communicated nanometer pore channel structure. The coating can be firmly attached to the surface of a metal implant, keeps structural integrity and stable performance in a long-term implantation process in vivo, and has excellent biocompatibility, active antibacterial and antioxidant functions and capability of remarkably promoting tissue repair and integration; the key problems that an existing coating is prone to falling off, poor in-vivo stability and single in biological function can be effectively solved.

Disclosed are a wet coating agent for a vehicle with which the surface of a vehicle is conveniently coated by being sprayed onto the vehicle and being rinsed with high-pressure water, and a method for preparing the same. The wet coating agent for a vehicle contains decamethylcyclopentasiloxane, purified water, an alcohol-based nonionic surfactant, amodimethicone oil, and a fluorinated silane.