54 results about "Silicon fluoride" patented technology

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.

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 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.

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 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 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.

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 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.

The invention belongs to the technical field of medical instruments, and relates to an anti-adhesion hydrophobic sputum suction tube and a preparation method thereof. The method comprises the steps of preparation of anti-adhesion hydrophobic coating liquid, sputum suction tube coating and coating curing. The preparation of the coating liquid comprises the step of preparing amino silicon dioxide, fluorinated nano silicon dioxide and a silicon fluoride-polydimethylsiloxane (F-SiO-PDMS) composite solution. The silicon dioxide in the coating liquid can construct a micro-nano coarse structure; the perfluoroalkyl chain can provide extremely low surface energy and endow the material with hydrophobic and oleophobic characteristics; the polydimethylsiloxane has the advantages of flexibility, biological safety and low surface energy. When the coating liquid is applied to surface treatment of the sputum suction tube, all the raw materials have a synergistic effect, and finally the F-SiO-PDMS super-hydrophobic coating with a network structure is formed. The coating is high in bonding firmness, and the contact angle change is small after the coating is soaked for 24 h. During clinical use, the inner wall and the outer wall of the sputum suction tube body both have a good anti-adhesion effect, adhesion of sputum to the tube body is reduced, and therefore clinical operation difficulty and hospital infection probability are reduced.

The invention discloses a method for detecting pyrethroid by using silicon fluoride quantum dots, belongs to the technical field of fluorescence sensing, and designs fluorinated fluorescent silicon quantum dots (FSiQDs) for rapid and visual detection of pyrethroid. The preparation method comprises the following steps: taking fluorophenylhydrazine and N-(beta-aminoethyl)-gamma-aminopropyltrimethoxysilane (DAMO) as raw materials, and reacting at 175-225 DEG C for 4-9 hours to obtain the fluorophenylhydrazine-gamma-aminopropyltrimethoxysilane. Under excitation of 300-400 nm, the fluoro-functionalized silicon quantum dot fluorescent probe emits blue fluorescence (450 nm), fluorescence quenching occurs after the blue fluorescence reacts with pyrethroid hydrolysate 3-phenoxybenzaldehyde (3-PBD), and the quenching rate reaches 75%. The probe has high selectivity and has no interference on common pesticides, metal ions and biomolecules.

The invention discloses a silicon tetrafluoride resource utilization method, and relates to the field of silicon tetrafluoride resource utilization. The method comprises the following steps: S1, introducing silicon tetrafluoride into an ammonium bifluoride solution, and filtering to obtain ammonium fluosilicate precipitate and first filtrate; s2, adding a desilicication precipitator into the first filtrate, and filtering to obtain fluosilicate precipitate and second filtrate; s3, mixing the second filtrate with concentrated sulfuric acid, heating, evaporating and analyzing, absorbing the obtained gas with water to obtain hydrofluoric acid, and crystallizing and separating out the residual liquid to obtain ammonium salt. The whole process route is mild in reaction condition and high in safety coefficient; high temperature and external electric field are not needed, and energy consumption is low; no secondary waste is generated, and the comprehensive utilization degree of resources is high.

The invention relates to the technical field of lithium battery electrolyte materials, and particularly discloses an LATP solid electrolyte based on SiF4 coating modification and a preparation method of the LATP solid electrolyte in order to solve the problem that the form and chemical performance of lithium metal are unstable in an existing LATP solid electrolyte. The LATP solid electrolyte comprises an LATP electrolyte substrate and a SiF4 coating deposited on the surface of the LATP electrolyte substrate, the SiF4 coating is connected with the LATP electrolyte substrate through a Si-F bond, the fluorine concentration in the SiF4 coating is gradually decreased in a gradient mode in the direction from the surface layer of the SiF4 coating to the LATP electrolyte substrate, the fluorine concentration of the surface layer of the SiF4 coating is 20 at%, and the fluorine concentration of the surface layer of the SiF4 coating is 20 at%. And the internal fluorine concentration of the SiF4 coating close to the LATP electrolyte substrate is 5at%. The silicon fluoride functionalized interface layer is constructed on the surface of the LATP solid electrolyte to realize dual optimization of interface stability and ion transmission performance, and based on SiF4 coating modification, the LATP solid electrolyte realizes improvement of the stability of a lithium metal negative electrode through interface modification.

The application discloses a new method for extracting lithium and fluorine from alumina-silicon by ammonia distillation waste liquid residue and waste anti-seepage material synergic roasting, and belongs to the technical field of industrial solid waste resource utilization and lithium extraction. The method first carries out water immersion pretreatment on the waste anti-seepage material to effectively remove part of soluble fluorine, then mixes the water immersion residue with the ammonia distillation waste liquid residue in a certain proportion to carry out synergic roasting, realizes directional solidification of fluorine, aluminum and silicon and opens a channel for efficient leaching of Li and Na. After roasting clinker is treated by water immersion, high selective leaching of lithium and sodium is realized, while aluminum, silicon and fluorine are effectively inhibited in the leaching residue. The application fundamentally avoids the problems of difficult separation and equipment corrosion caused by hydrogen fluoride gas escaping and large amounts of silicon and aluminum dissolving out in the acid method process through two-stage fluorine removal and the synergistic effect of appropriate water immersion residue and ammonia distillation waste liquid residue. The process is simple, environment-friendly, high in lithium extraction efficiency, good in stability of solidified residue, and can realize synergic and efficient utilization and harmless treatment of the waste anti-seepage material and the ammonia distillation waste liquid residue.

The invention discloses a preparation method of an electronic paper microcup release agent, and belongs to the technical field of electronic paper manufacturing. The method comprises the following steps: adding a fluorinated silane coupling agent into anhydrous toluene, performing ultrasonic dissolution to prepare an organosilane solution with the mass concentration of 5-10wt%, and soaking a microcup template in the solution for 2 hours; taking out the template, and drying in a drying oven at 50-100 DEG C; and wiping with absolute ethyl alcohol and airing to obtain the surface-modified microcup template. Through a reverse fluorination modification scheme, a fluorinated silane coupling agent is used for reversing the hydrophilic property of the surface of the template to the hydrophobic property through a self-assembled single-layer structure, so that the surface energy is effectively reduced, and the problems of incomplete demolding and surface adhesion in microcup electronic paper manufacturing are solved. The method has the advantages of few process steps, easily available raw materials and no need of complex equipment, is suitable for batch template treatment, and has good large-scale production application value.

The application belongs to the technical field of resource recycling and material preparation, and provides a method for preparing silicon powder by using retired wind power blades. The method can recycle silicon powder with high purity and resin with low ash content from the retired wind power blades. The method comprises the following steps: S1, disassembling the retired wind power blades, removing the non-glass fiber composite material parts, and then crushing into fragments; S2, grinding the fragments; S3, carrying out the first stage reaction of the powder material in a mixed solution of hydrofluoric acid and an organic solution; then carrying out the second stage reaction to generate silicon tetrafluoride gas, filtering the material liquid after the reaction to obtain solid-phase resin; collecting the silicon tetrafluoride gas, stirring and standing in a weak alkaline aqueous solution to obtain a silicon acid precipitate; S4, filtering, washing and calcining the silicon 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.

A method for producing a halogenated alkene, the method comprising converting a halogenated alkane represented by formula (1) into a halogenated alkene represented by formula (2) and a compound represented by formula (3) in a gas phase in the presence of silicon oxide and an alkali metal element. R1-R3 each independently represent a hydrogen atom, a fluorine atom, a methyl group, a fluorinated methyl group, an ethyl group, or a fluorinated ethyl group, and the number of carbon atoms in each of formulae (1)-(3) is 2-4.

The application relates to the technical field of silicon direct bonding chip process technology, in particular to a silicon direct bonding chip barrier structure and a dry etching method. The method sets the target thickness of a top silicon layer of a silicon direct bonding chip as a predetermined thickness range; a three-stage etching process is used to etch the top silicon layer, the three stages include a starting stage, a main etching stage and an endpoint control stage; in the main etching stage and the endpoint control stage, the intensity change of a silicon fluoride compound characteristic peak is monitored in real time through an optical emission spectrum monitoring system; when the absolute value of the second derivative of the intensity change of the characteristic peak is greater than a set threshold value, the endpoint control stage is triggered; in the endpoint control stage, a pulse process of a fluorocarbon-containing gas is introduced, and the etching power is gradually reduced to realize the gradient reduction of the etching rate, so that the problems of large thickness deviation and insufficient sidewall angle in the etching of the silicon direct bonding chip are solved.