83 results about "Methylsilane" patented technology

The invention relates to the technical field of batteries, in particular to a battery and a power utilization device, and the battery comprises a positive pole piece, a negative pole piece and electrolyte; the positive pole piece comprises a positive current collector and a positive active layer arranged on at least one surface of the positive current collector, the positive active layer comprises a positive lithium supplement agent, and the positive lithium supplement agent comprises at least one of lithium ferrite and lithium nickelate; the electrolyte comprises a first additive, the first additive comprises a compound with a structure shown in a formula (I), R1, R2 and R3 are respectively and independently selected from one of allyl, divinyl methyl silane, vinyl dimethyl silane or trivinyl silane, and at least one of R1, R2 and R3 is selected from one of divinyl methyl silane group, vinyl dimethyl silane group or trivinyl silane group. By adding the first additive into the electrolyte, dissolution of iron ions or nickel ions in the lithium supplement agent is inhibited, the structural stability of the positive electrode lithium supplement agent is enhanced, and the cycle life of the battery is prolonged.

This invention relates to the field of electrochemical energy storage technology, specifically disclosing a locally high-concentration electrolyte and its preparation method. The electrolyte uses methoxytrimethylsilane and 2,2,2-trifluoroethyl methanesulfonate as the base solvent, ethoxy(pentafluoro)cyclotriphosphazene or 1,1,1,3,3,3-hexafluoroisopropyl methyl ether as the functional diluent, and is compounded with specific proportions of sodium bis(trifluoromethanesulfonyl)imide, sodium hexafluorophosphate as the main salt, and vinyl sulfate and siloxane polymer additives. Through the synergistic effect between the components, while ensuring high ionic conductivity and excellent wettability, it also significantly improves the stability of the negative electrode interface, providing key material support for the development of high-energy-density negative electrode-free sodium metal batteries, and showing broad application prospects in large-scale energy storage, portable electronic devices, and other fields.

The application provides a method for improving the mechanical properties of ceramic matrix composites, and relates to the technical field of ceramic matrix composite preparation. The method uses polymethylsilane (PMS) as a ceramic precursor, silicon carbide powder as a filler, divinylbenzene (DVB) as a cross-linking agent, introduces boron nitride as a sintering aid and a second-phase toughening component, and is prepared through six core processes of constant-temperature mixing under nitrogen protection, carbon fiber cloth vacuum impregnation, laminating exhaust forming, tungsten bead weight matching shaping, two-stage gradient sintering and multiple precursor impregnation and densification to obtain high-performance continuous carbon fiber reinforced silicon carbide composite materials. The sintering promotion effect and dispersion toughening mechanism of boron nitride are used, and the optimized forming process of layer-by-layer exhaust and weight matching shaping is used to effectively reduce the porosity of the matrix, and significantly improve the material density, bending strength and fracture toughness. The process parameters of the application are quantifiable and controllable, the batch stability is high, no special equipment is needed, and the application can be adapted to large-scale production.

The invention discloses a green synthesis method of electronic-grade methylsilane and hydrogen chloride based on an ionic liquid catalyst, belongs to the technical field of synthesis of organosilicon compounds and high-purity electronic special gases, and discloses a green synthesis method of electronic-grade methylsilane and hydrogen chloride based on an ionic liquid catalyst. Comprising the following steps of S1, catalyst preparation, S2, methylsilane and hydrogen chloride preparation, S3, product purification and S4, activated carbon regeneration, 1-ethyl-3-methylimidazole aluminum chloride as the catalyst has good thermal stability and catalytic activity, the risk of catalyst inactivation is avoided, the catalyst can be pumped into a reaction kettle, the whole process is operated in a closed mode, and operation is easy. The method is safe, reliable and environment-friendly, and meanwhile, regeneration and recycling of the activated carbon bring a better use prospect.

The utility model relates to chemical synthetic technical field, concretely is a kind of production system of industrial grade ethylsilane, including the ethylsilane production unit, heat exchange unit, gas-liquid separation unit, ethylsilane temporary storage tank connected in turn;Ethylsilane production unit includes hydrogen preheater, methylsilane preheater, ethylsilane reactor, wherein, hydrogen preheater and methylsilane preheater one end are all provided with inlet pipe, and other end is all connected with ethylsilane reactor, and ethylsilane reactor is connected with heat exchange unit;Heat exchange unit is also connected with hydrogen circulation unit and methylsilane circulation unit.Hydrogen recovery recycling, after a period of time, the hydrogen generated in the reaction process can meet the operation required of ethylsilane production unit, stop external hydrogen supply;Methylsilane recovery recycling, save material, reduce consumption.

The application provides a transparent flexible double-crosslinked silicon-based modified cellulose aerogel and a preparation method thereof. Vinyl silane and methyl silane are used as precursors, a double-crosslinked method of radical polymerization / hydrolysis polycondensation is adopted, a polysiloxane homogeneous sol is prepared, a cellulose gel is immersed in the homogeneous sol, and finally the supercritical drying process is performed to prepare the aerogel of the application. Due to the double-crosslinked structure of radical polymerization and hydrolysis polycondensation, the aerogel has good transparency and strength. Meanwhile, the introduction of methyl silane and the unique characteristics of cellulose endow the aerogel with good hydrophobic property and excellent flexibility. In addition, the aerogel material has an extremely low thermal conductivity, and the heat preservation and insulation performance is far superior to that of traditional heat preservation materials, so that the aerogel has a broad application prospect in the fields of heat preservation and insulation and transparent glass.

The invention discloses a preparation process of electronic-grade bis (diethylamino) silane, and relates to the technical field of chemical synthesis. The preparation process of the electronic-grade bis (diethylamino) silane at least comprises the following preparation steps: dehydrating monosilane through a low-temperature adsorption tower to obtain dehydrated monosilane, and separating heavy components from diethylamine through a molecular sieve membrane to obtain purified diethylamine; reacting the dehydrated monosilane with the purified diethylamine in the presence of a palladium-loaded catalyst to obtain crude bis (diethylamino) silane; and carrying out reduced pressure rectification on the crude bis (diethylamino) silane to separate low-boiling-point substances, and carrying out complexing adsorption on the low-boiling-point substances by using an ethylenediamine tetraacetic acid modified silica gel bed layer to remove metal ions so as to obtain the electronic-grade bis (diethylamino) silane. The purity of the prepared electronic-grade bis (diethylamino) silane is greater than or equal to 99.9995%, the chloride ion content is less than or equal to 20ppb, the total amount of metal impurities is less than or equal to 8ppb, the reaction yield is greater than or equal to 91%, and the comprehensive energy consumption is reduced by more than 50%.

This invention belongs to the field of organosilicon thermally conductive materials, and provides a liquid silicone rubber system for thermally conductive pads and its preparation method. The system comprises vinyl-terminated dimethyl polysiloxane, MQ / phenyl-enriched pre-crosslinked polysiloxane microgel, vinyltrimethoxysilane-modified hexagonal boron nitride, alumina, trimethylsilane-terminated dimethylsiloxane-methylhydrosiloxane copolymer, 1,3-divinyl-1,1,3,3-tetramethyldisiloxane zero-valent platinum complex, and 1-ethynyl-1-cyclohexanol, forming a two-component packaging. This system is advantageous in balancing thermal conductivity, electrical insulation, flowability, defoaming, softness and fit, and long-term stability, making it suitable for the preparation of thermally conductive pads.

The application discloses a kind of anti-fake color-changing ink and printing process for flat paper to print two-dimensional code, belong to the technical field of ink for anti-fake.The anti-fake color-changing ink according to weight fraction, including: acrylic emulsion 35-40 parts, polyurethane emulsion 15-20 parts, bisphenol A type epoxy resin 5-8 parts, thermochromic material 6-10 parts, hydrogel coated thermochromic material 2-5 parts, temperature-sensitive color-changing capsule 5-8 parts, scratch-resistant additive 2-3 parts, first coupling agent 1-2 parts, second coupling agent 1-2 parts, leveling agent 0.5-0.8 parts, defoaming agent 0.3-0.5 parts, stabilizer 0.5-0.8 parts, first crosslinking agent 2-3 parts, methylsilane 1-2 parts, wax emulsion 1-2 parts, wetting agent 2-3 parts, preservative 0.1-0.5 parts and deionized water 15-20 parts;The hydrogel coated thermochromic material is acrylamide-based hydrogel coated thermochromic material.The anti-fake color-changing ink can simultaneously realize the promotion of anti-precipitation, high adhesion, scratch resistance, high-temperature aging resistance by the synergy of hydrogel coated thermochromic material and scratch-resistant additive.

The invention discloses a mirror-polished thin ceramic rock plate and a preparation method thereof, and relates to the field of ceramics. When the mirror-polished thin ceramic rock plate is prepared, octamethylcyclotetrasiloxane, 3-dimethylaminopropyl (dimethoxy) methylsilane and vinyl pentamethyldisiloxane are subjected to a reaction, and polysiloxane is prepared; acrylic acid-2-hydroxyethyl ester and cyanuric chloride react to prepare a cross-linking agent, polysiloxane, the cross-linking agent, chloropropane and methyl iodide react to prepare a hydrophobic antibacterial coating material, the hydrophobic antibacterial coating material and a photoinitiator are evenly mixed, then the surface of a ceramic rock plate is coated with the mixture, and ultraviolet curing is conducted to prepare the hydrophobic antibacterial ceramic rock plate. The mirror-polished thin ceramic rock plate prepared by the preparation method disclosed by the invention has good antibacterial property and hydrophobic property.

The invention belongs to the technical field of chemical vapor deposition, and particularly relates to a method for synthesizing methylsilane to grow a 4H-SiC single crystal by using an ionic liquid catalyst, which comprises the following specific steps: step 1, taking high-purity methyltrichlorosilane (MeSiCl3) as an initial raw material, the preparation method comprises the following steps: reacting a raw material with an ionic liquid catalyst 1-ethyl-3-methylimidazole aluminum chloride [EMIM] [AlCl4] in a specific molar ratio to synthesize electronic-grade methylsilane, synthesizing the electronic-grade methylsilane by using the ionic liquid catalyst, and realizing high-efficiency and high-quality crystal growth by using an accurately controlled adsorption purification and crystal growth process. Particularly, the infrared thermometer is arranged in the HTCVD equipment, and the measurement accuracy of the infrared thermometer reaches + / -1 DEG C, so that the infrared thermometer plays a key role in monitoring the temperature control in the crystal growth process, and the uniformity and repeatability of crystal growth are ensured.

This application discloses a flame-retardant molded silicone rubber and its vulcanization method. The silicone rubber comprises the following raw materials in parts by weight: 100 parts of raw silicone rubber, 1.5-3.5 parts of curing agent, 20-30 parts of flame-retardant filler, and 10-20 parts of flame retardant. The flame retardant comprises paraformaldehyde, an aminosilane coupling agent, and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide in a molar ratio of 1-1.6:1:1-1.2. The paraformaldehyde and aminosilane coupling agent undergo nucleophilic addition to obtain an N-hydroxymethylsilane intermediate. The N-hydroxymethylsilane intermediate then undergoes a condensation reaction with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to obtain the final product. This application aims to solve the problems of poor compatibility between traditional flame retardants and the silicone rubber matrix, easy agglomeration and precipitation, which lead to deterioration of the mechanical properties and insufficient flame-retardant stability of silicone rubber.

This invention provides a composite flame-retardant material formed by combining organosilicon resin and hybrid flame-retardant particles. The organosilicon resin is formed by the hydrolysis and condensation of a mixture of organosilicon monomers. The organosilicon monomer mixture includes monomethylsilane monomer, dimethylsilane monomer, monophenylsilane monomer, and diphenylsilane monomer. The hybrid flame-retardant particles include nanoparticles modified with a mercaptosilane coupling agent. The surface of the mercaptosilane coupling agent-modified nanoparticles is grafted with phosphonic acid groups. Compared with the prior art, this invention introduces phosphorus by grafting phosphonic acid groups onto the surface of the mercaptosilane coupling agent-modified nanoparticles, thereby improving the flame-retardant performance by combining phosphorus with silicon, while reducing the silicon content and avoiding its impact on mechanical properties. This allows the composite flame-retardant material to be used for surface flame retardancy of polyurethane materials, improving their flame-retardant efficiency and smoke suppression effect without affecting the inherent properties of the polyurethane material.

The invention relates to the technical field of rubber pads, in particular to a coupling rubber pad and a preparation method thereof.Copolymerized epichlorohydrin rubber and homopolymerized epichlorohydrin rubber are compounded to serve as a rubber pad base material, compound rosin is introduced to serve as a tackifier, an acrylate group is introduced into rosin, hydrogenated rosin-based acrylate is obtained, copolymerization is initiated through light, and the coupling rubber pad is prepared. Grafting double-bond terminated poly (carbamate-urea) and 3-acrylamido phenylboronic acid to obtain composite rosin; due to the introduction of double-bond terminated poly (carbamate-urea), the rubber pad has certain self-repairability, and the durability and fatigue resistance of the rubber pad are improved; 3-acrylamido phenylboronic acid is introduced, so that the biocompatibility of the rubber pad is improved; carbon black is subjected to modification treatment, the carbon black is subjected to double bond treatment through vinyl trimethylsilane, then a salicylaldehyde derivative containing double bonds and ammonium is grafted through light click, modified carbon black is obtained, and therefore the service life of the coupling rubber pad is prolonged.

The invention provides a preparation method of a C / SiC ceramic composite material, and belongs to the technical field of ceramic-based composite materials. The preparation method comprises the following steps: mixing boron nitride nano powder, polyol, diisocyanate, an emulsifier and water, and reacting to obtain boron nitride-loaded polyurethane microspheres; mixing the boron nitride-loaded polyurethane microspheres, polymethylsilane and carbon source resin to obtain mixed resin; and under the protection of inert gas, adding the mixed resin into a container filled with a carbon fiber woven body, and sequentially carrying out impregnation, curing treatment and cracking treatment to obtain the C / SiC ceramic composite material. Boron nitride is introduced into the composite material, when the composite material is under the oxygen-containing high-temperature scouring condition, boron nitride can absorb heat and decompose, chemical bond recombination occurs, the defect repairing effect is achieved, and the composite material has good toughness and self-repairing capacity and shows excellent tensile strength and impact resistance.

The invention discloses polymethylsilane capable of regulating and controlling the C / Si atomic ratio and a preparation method and application thereof.The preparation method comprises the steps that metal sodium is cut and crushed, and metal sodium fragments are obtained; adding the metal sodium fragments into an organic solvent, and heating until the metal sodium is in a molten state to obtain a mixture; stirring and cooling the mixture to obtain a sodium sand mixture; mixing methyl dichlorosilane, allyl methyl dichlorosilane, tetrahydrofuran and 15-crown ether-5, and then dropwise adding the mixture into the sodium sand mixture to react; the sodium sand in the preparation method has the characteristics of uniform particle size, high activity and clean surface; tetrahydrofuran and 15-crown ether-5 are added into dichloromethylsilane and allyl methyldichlorosilane, so that the single electron transfer rate of metallic sodium to dichloromethylsilane can be increased, the reaction activation energy can be reduced, the reaction efficiency can be improved, the molecular structure can be optimized, the loss of carbon elements can be made up, and the problem that PMS is rich in silicon after pyrolysis can be solved.

The invention belongs to the field of daily chemicals, and discloses an anti-wrinkle composition based on lipidosome delivery, which comprises the following components by weight: 0.1-1 part of a Chrysanthemum indicum extract; 0.1 to 1 part by weight of dipalmitoyl hydroxyproline; and 0.1 to 1 part by weight of methylsilanol mannuronate. According to the composition, dipalmitoyl hydroxyproline, a stellera chamaejasme extract and methylsilanol mannuronate serve as active ingredients, liposome serves as a carrier, and the anti-wrinkle effect can be achieved to the maximum extent. Meanwhile, the invention further discloses the lipidosome, application of the lipidosome and cosmetics.

This invention belongs to the field of carbon fiber composite technology, specifically relating to a method for preparing silicon carbide fibers based on modified methylsilane. The method includes: low-temperature copolymerization of polymethylsilane, divinylbenzene, and phenyltrichlorosilane under a platinum-based catalyst to obtain a crosslinked modified precursor; melt spinning the precursor to obtain a precursor fiber; subjecting the precursor fiber to gradient-temperature ammonolysis in a mixed atmosphere of ammonia and inert gas, achieving curing through a dual mechanism of surface chemical ammonolysis and internal thermal crosslinking; and heating the cured fiber in an inert atmosphere to 1200°C, then switching to a nitrogen-containing atmosphere, and continuing to heat to 1200–1600°C for high-temperature crystallization sintering. This invention avoids the high-temperature performance degradation problem caused by the introduction of oxygen elements in traditional air crosslinking, while simultaneously generating a silicon nitride protective layer during high-temperature pyrolysis, improving the fiber's thermal shock resistance, oxidation resistance, and high-temperature mechanical stability.

The invention discloses an eyebrow pencil, and belongs to the field of cosmetics. The eyebrow pencil aims at solving the problem that an existing eyebrow pencil cannot give consideration to long-acting makeup keeping, smooth smearing and low irritation. The eyebrow pencil refill composition comprises a composite film forming system, a solvent and a solvent, wherein the composite film forming system is composed of polyesteride-5, trimethylsiloxy silicate and trimethyl pentaphenyl trisiloxane according to a specific weight ratio; the compound wax-based framework system is composed of ozokerite, oxidized polyethlene wax and Japanese wax; the specific skin feeling conditioning agent is a vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane cross-linked polymer; the plant-derived bioactive compound is prepared from herba centellae, herba portulacae and zanthoxylum piperitum fruit extracts; a colorant and a volatile solvent are also included. Through the synergistic effect of all the components, the eyebrow pencil has excellent water-proof, oil-proof, migration-resistant and makeup-keeping performance, excellent smearing smoothness, good mechanical strength and low irritation, is suitable for sensitive skin, is simple in preparation method and is suitable for industrial production.

The invention relates to the technical field of organic silicon emulsion preparation, and discloses stable organic silicon emulsion as well as a preparation method and application thereof. According to the method, hydroxyl-terminated polymethylsilicone oil is used as an organic silicon matrix, hydroxypropyl-beta-cyclodextrin is used as a biomass hydrophilic modifier, self-made glyceryl ether modified methylsilane is matched, a prepolymer is prepared through compound modification, then the prepolymer and a compound emulsifier aqueous solution are mixed and emulsified, and finally a finished product is obtained through crosslinking curing of an initiator. The problems that an existing organic silicon emulsion is prone to layering and demulsification, poor in compatibility and single in function are solved through a double stabilization mechanism of physical anchoring and chemical crosslinking, and the product keeps a uniform state in a complex environment and has the multiple functions of softness, lubrication, film forming and the like. The preparation process is simple and mild, raw materials are easy to obtain, complex purification is not needed, and the method is suitable for large-scale production and can be widely applied to the fields of textiles, cosmetics, personal care, medicine and industry.

The invention relates to a process for depositing a silicon carbide coating on the surface of a graphite piece, which is characterized by comprising the following steps: S1, placing the cleaned graphite piece in a deposition chamber, closing the chamber, and vacuumizing; s2, depositing a transition layer on the surface of the graphite piece, S3, introducing double precursor gases, hydrogen and argon into the deposition chamber, and depositing on the surface of the transition layer to obtain a silicon carbide layer; s4, stopping introducing the gas, carrying out heat preservation for a period of time, then bombarding the surface by using inert gas plasma for etching, and continuously carrying out heat preservation to obtain a product; the double precursor gas comprises methyl trichlorosilane and methylsilane. The method has the effect of improving the bonding strength of the silicon carbide coating and the surface of the graphite piece.

The invention relates to the technical field of aerogel materials, and discloses a chitin aerogel heat insulation felt and a preparation method thereof.The chitin aerogel heat insulation felt is prepared by the steps that vinyl silane, methylsilane and chitin are prepared into homogeneous sol, then a needled glass fiber felt is immersed in the homogeneous sol, and then aging and drying are conducted to obtain the chitin aerogel heat insulation felt; wherein the homogeneous sol comprises vinyl silane, methylsilane, chitin and a catalyst, and an opacifying agent and a dispersing agent are also added. The aerogel material has good toughness and extremely low heat conductivity coefficient, and the thermal insulation performance is far better than that of a traditional thermal insulation material, so that the aerogel material has wide application prospects in the fields of thermal insulation of high-temperature pipelines and cold insulation of refrigeration houses.

The invention discloses a high-strength tungsten-copper alloy and a preparation method thereof, and relates to the field of alloys. When the high-strength tungsten-copper alloy is prepared, tungsten, copper and cerium are subjected to mixing, ball milling, pressing and compression molding, and a tungsten-copper alloy matrix is prepared; the preparation method comprises the following steps: reacting vinyl (chloromethyl) dimethylsilane with 4-methylaminopyridine to obtain a pyridine monomer; the preparation method comprises the following steps: reacting N, N-diethylallylamine with 2, 6-di-tert-butyl-4-bromomethylphenol to prepare an anti-aging monomer; mixing an anti-aging monomer, a pyridine monomer, butyl methacrylate, N, N-dimethylformamide, the initiator solution and the emulsifier solution to prepare a surface treatment solution; the preparation method comprises the following steps: treating a tungsten-copper alloy matrix with nitric acid, smearing a surface treatment solution on the surface, curing, and carrying out surface treatment with dimethyldimethoxysilane to obtain the high-strength tungsten-copper alloy. The high-strength tungsten-copper alloy prepared by the invention has waterproof and anti-aging capabilities.

The invention discloses a refractive and transparent raw material based on siloxane compounding and a preparation method of the refractive and transparent raw material. Comprising phenyl polytrimethylsiloxane, a VP / eicosene copolymer, diphenyl polydimethylsiloxane, hydrogenated polyisobutene, trimethyl pentaphenyl trisiloxane, trimethyl silane oxygen phenyl polydimethylsiloxane, a VP / hexadecene copolymer, polyisobutene and diisostearyl malate. According to the invention, a unique refraction system can be formed in lip and base products by reasonably proportioning a plurality of organosilicon compounds and copolymers with different refraction characteristics. The components can scatter and reflect light from multiple angles, so that the skin and the lips present natural, soft and layered gloss, and the refraction and transparency effects of the product are remarkably improved.

The invention discloses a method for preparing silicon carbide single crystals from methylsilane, and relates to the technical field of preparation of silicon carbide single crystal materials, silicon carbide of different crystal forms can be prepared, the pressure in a vapor deposition chamber is adjusted to 0.1 E-3 to 10 kPa, vacuumizing treatment is carried out, a low-pressure environment is beneficial for reducing collision and interference of gas molecules, and the silicon carbide single crystals are prepared. Methylsilane is added into the silicon carbide seed crystal, so that the reaction efficiency is improved, the purity of the product is favorably improved, and the methylsilane can decompose and provide silicon and carbon elements required by growth of silicon carbide to react with the silicon carbide seed crystal under the conditions of high temperature and specific atmosphere, so that the silicon carbide single crystal grows on the surface of the seed crystal; an operator can effectively control the growth environment of crystals by controlling parameters such as the proportion, the temperature and the vacuum degree of methylsilane and argon and adjusting reaction conditions, so that high-purity and low-defect-density silicon carbide single crystals are obtained, silicon carbide single crystals with different crystal forms can be prepared, and specific requirements in different application fields are met.

The invention discloses a device and a method for preparing methyl silane standard gas in hydrogen, and relates to the technical field of preparation of methyl silane standard gas in hydrogen, the method for preparing methyl silane standard gas in hydrogen comprises the following steps: a gas cylinder is subjected to heating and vacuumizing cleaning treatment, the heating temperature is 80 DEG C, and the vacuum degree is lt; 5P, secondary treatment of the gas cylinder: the gas cylinder is vacuumized, and the vacuum degree is lt; 5 Pa, weighing the mass of the gas cylinder, introducing 5N methylsilane and 5N hydrogen through a gas distribution busbar, weighing the mass of the gas cylinder again, repeating the operation until the difference value between the mass of the gas cylinder and the mass of the gas cylinder weighed for the first time after secondary treatment of the gas cylinder is greater than or equal to 2 g, rolling and uniformly mixing, standing the gas subjected to rolling and uniformly mixing overnight for 8-12 h, and cooling to room temperature. Due to the design of the VCR interface, the gas cylinder can be mounted and dismounted more simply, conveniently and quickly, and meanwhile, gas distribution is performed by a weighing method, so that the proportion of each component can be accurately controlled.

The invention relates to a mono-boratriazole compound as well as a synthesis method and application thereof, positive ion boron-nitrogen alkyne and (trimethylsilyl) diazomethane are subjected to cycloaddition reaction, trimethylsilyl is migrated from carbon atoms to nitrogen atoms to form a positive ion mono-boratriazole framework, trimethylsilyl and counter ions are further removed by using alkali, and the mono-boratriazole compound is obtained. The mono-boratriazole compound is obtained. The mono-boratriazole compound disclosed by the invention has a wide application prospect in the fields of metal coordination reaction, reverse cyclization ring-opening reaction and preparation of unsaturated boron compounds.

The invention relates to the technical field of self-repairing coatings, in particular to a self-repairing silicon-based water-based coating and a preparation method thereof. The self-repairing silicon-based water-based paint is prepared from the following raw materials in parts by mass: 5 to 15 parts of water-based fluorine-containing hydroxyl acrylic emulsion, 10 to 20 parts of water-based epoxy resin emulsion, 5 to 15 parts of hydroxyl-terminated polydimethylsiloxane, 1 to 5 parts of activated graphene oxide, 1 to 5 parts of micro-nano silicon dioxide, 1 to 2 parts of catalyst, 5 to 10 parts of methoxytrimethylsilane and 1 to 4 parts of diamino type silane coupling agent. 0.5 to 1.5 parts of amino-terminated polyamidoamine, 10 to 20 parts of aliphatic modified isocyanate curing agent and 0.5 to 1 part of triethylene tetramine. After the coating is damaged, rapid self-healing can be achieved, the coating has good self-repairing performance, and the preparation method is simple and suitable for large-scale application and popularization.

The application discloses a purification method of tetramethylsilane, which comprises the following steps: S1, pre-purification treatment is performed on tetramethylsilane raw materials to obtain tetramethylsilane crude product; S2, the tetramethylsilane crude product is mixed with a catalyst, heated, and catalytic reaction is generated so that isopentane in the tetramethylsilane crude product is converted into isoamylene to obtain an intermediate product; and S3, rectification treatment is performed on the intermediate product to remove isoamylene in the intermediate product, and purified tetramethylsilane is obtained. According to the purification method of tetramethylsilane, most of the easily separated impurities in the tetramethylsilane raw materials are removed through pre-purification treatment, then the tetramethylsilane crude product is mixed with a catalyst, and the difficult-to-separate isopentane impurities are converted into isoamylene under the catalytic action of the catalyst; the boiling point of isoamylene is greatly different from that of tetramethylsilane, so the isoamylene is removed through rectification, and finally the purified tetramethylsilane is obtained.