124 results about "Methylsilane" patented technology

The invention provides a sandwich-structure bidirectional film-forming composition and a preparation method and application thereof, and relates to the technical field of sunscreen, the preparation method comprises the following steps: mixing isododecane, trimethylsiloxy silicate ester and disteardimonium hectorite to obtain an oil phase mixture; mixing butanediol, the sodium hyaluronate cross-linked polymer and the like to obtain a water-phase mixture; homogenizing the oil phase mixture and the water phase mixture; performing curing reaction and homogenizing pretreatment. According to the sandwich structure disclosed by the invention, the disteardimonium hectorite is taken as a carrier, an oil phase forms an initial hydrophobic membrane, the oil phase expands when encountering water and sweat, sunscreen protection is synergistically enhanced, and the prepared composition of the sandwich structure is good in stability.

The invention relates to the technical field of cables, and provides a high-strength corrosion-resistant flexible cable which sequentially comprises a sheath layer, an insulating layer and a conductor from outside to inside, the sheath layer comprises the following components in parts by weight: 90 parts of composite polyvinyl chloride, 10-15 parts of high-density polyethylene, 6-12 parts of ethylene propylene diene monomer, 3-6 parts of ethylene-methyl methacrylate copolymer, 10-20 parts of filler, 1-2 parts of antioxidant, 2-4 parts of plasticizer, 15-18 parts of flame retardant and 0.5-0.7 part of vulcanizing agent; the preparation method of the composite polyvinyl chloride comprises the following steps: putting polyvinyl chloride into a plasma treatment device, vacuumizing, introducing a plasma gas source, and carrying out etching treatment to obtain the composite polyvinyl chloride, the plasma gas source comprises hexafluoroacetone and methylsilane in a volume ratio of (3-9): 1. According to the technical scheme, the problem of poor corrosion resistance of the cable sheath layer in the prior art is solved.

The invention belongs to the technical field of cosmetics, and particularly discloses a freeze-dried powder base solution and a preparation method thereof. The freeze-dried powder base solution comprises a component A and a component B. The component A is prepared from magnesium potassium fluosilicate, a filling agent, lauroyl lysine, titanium dioxide, CI 77492, CI 77491, CI 77499 and the balance water, butanediol, xanthan gum, a thickening agent, trehalose, polysorbate-60, an emulsifying agent a, phenyl polytrimethylsiloxane, isononyl isononanoate and a preservative. The component B is prepared from the following components: the balance of water, butanediol, a preservative, magnesium sulfate, an emollient, disteardimonium hectorite, phenyl polytrimethylsiloxane, isododecane, trimethylsiloxy silicate ester, an emulsifier b and PEG-10 (Polyethylene Glycol) polydimethylsiloxane. Various raw materials are mixed, so that the obtained liquid foundation has relatively good dispersity, has smooth and refreshing skin feeling, and is prevented from being thick, sticky and greasy.

The invention relates to the technical field of insulating paint, in particular to insulating paint capable of preventing bird damage and foreign matter lap joint and a preparation method of the insulating paint. The invention provides an insulating coating for preventing bird damage and foreign matter lap joint. The insulating coating is prepared from the following raw materials in parts by weight: 55 to 80 parts of methylsilane modified polyurethane liquid, 23 to 40 parts of polyamide fiber nano powder, 10 to 20 parts of organic silicon modified calcium lignosulphonate suspension, 8 to 10 parts of hydrophobic silicon dioxide, 2 to 5 parts of flatting agent, 1 to 2 parts of pigment, 3 to 5 parts of anti-aging agent and 10 to 15 parts of diluent. The insulating property of the coating is extremely high, the withstand voltage value per millimeter can reach 40kV and above, while the withstand voltage value per millimeter of a conventional insulating coating is generally 18kV; and the insulating paint is high in strength and good in toughness, and has good hydrophobicity and hydrophobicity migration.

The present invention relates to the field of skin cosmetics, and in particular to a soothing, long-lasting, sun-protective isolation cream and its preparation method. The isolation cream's raw materials include butylene glycol, isododecane, polydimethylsiloxane, ethylhexyl salicylate, phenylbenzimidazole sulfonic acid, butyloctanol salicylate, diisopropyl sebacate, diisopropyl adipate, vinyl polydimethylsiloxane / polymethylsilane silsesquioxane crosspolymer, ethylhexyl triazone, p-hydroxyacetophenone, disteardimonium hectorite, aluminum hydroxide, Piper mesenteriae leaf / root / stem extract, Gentiana scabra extract, and water. The isolation cream prepared by the present invention has good soothing, long-lasting, and sun-protective effects, as well as excellent free radical resistance and moisturizing effects. It is easy to apply and can improve skin gloss to a certain extent.

The invention relates to the technical field of cosmetics, and particularly discloses bright non-stick cup lip glaze and a preparation method thereof. The raw materials of the lip glaze comprise the following components in parts by weight: 15 to 40 parts of a solvent, 5 to 15 parts of an emollient, 30 to 70 parts of a film-forming agent, 2 to 20 parts of a brightener, 0.1 to 10 parts of a thickening agent, 3 to 10 parts of a coloring agent, 0.5 to 1.0 part of a preservative, 0.1 to 1.0 part of an antioxidant, 0.1 to 1.0 part of a cool feeling agent, 0.01 to 1.0 part of an active component and 0.01 to 1.0 part of an aromatic, wherein the film forming agent is prepared from an acrylic acid (ester) / polydimethylsiloxane copolymer, polymethyl silsesquioxane, trimethylsiloxy silicate ester and polypropyl silsesquioxane. The lip glaze provided by the invention is not easy to stick to a cup, is lasting, and also has a relatively good light effect.

The invention discloses a preparation method and application of a silicon-based functionalized fluorenyl polysubstituted acetylene copolymer and a gas separation membrane thereof. Belongs to the technical field of polymer material and gas separation. The invention provides a new thought for preparation of a high-permeability gas separation membrane material. The preparation method comprises the following steps: carrying out copolymerization on 1-phenyl-2-(7-trimethylsilyl-9, 9-bis (trimethylsilyl-fluorene-2-yl) acetylene and 1-phenyl-2-(7-trimethylsilyl-9, 9-dimethyl-fluorene-2-yl) acetylene under the catalysis of TaCl5-n-Bu4Sn, so as to prepare a copolymer with high molecular weight; the preparation method comprises the following steps of: carrying out film casting on a solution of the nano-silver oxide, and then carrying out desiliconization treatment by using normal hexane / trifluoroacetic acid to obtain a gas separation membrane with the thickness of 100-220 microns, the specific surface area of 298-492 m / g and the total pore volume of 0.134-0.299 cm / g. The prepared separation membrane has the advantages that the COpermeability is up to 36,900 Barrer, the Opermeability is 19,800 Barrer, the thermal decomposition temperature exceeds 420 DEG C, the separation membrane can be used for separating gases such as COO, ON and the like, the preparation process is simple and convenient, and the industrial potential is realized.

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 application relates to the technical field of fine chemical synthesis, and discloses a PDI catalyst for preparing cresol trisiloxane, a preparation method and a preparation method of cresol trisiloxane. Me PDI)FeBr2, sodium and nai are dissolved in an ultradry solvent, and the reaction is stirred under a nitrogen atmosphere; the reaction product is post-treated to obtain a PDI catalyst; 2-(2'-hydroxy-3'-methylethenyl-5'-methylphenyl) benzotriazole and the PDI catalyst are dissolved in an organic solvent, the temperature is increased to 50-60 DEG C, bistrimethylsiloxy methylsilane is added dropwise, and the reaction is preserved for 6-10 h; the organic solvent is removed by concentration under reduced pressure, and crystallization is carried out to obtain cresol trisiloxane. The iron complex catalyst is used to replace the traditional platinum catalyst, the material cost is reduced, the risk of heavy metal residue can be avoided, a small amount of the iron complex catalyst can be used, and higher catalytic activity and selectivity can be realized.

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 present invention provides a high-adhesion and high-water-resistant heat-sensitive anti-counterfeiting ink for printing, comprising the following components in parts by mass: 30-40 parts of acrylic emulsion, 10-20 parts of polyurethane emulsion, 1-10 parts of bisphenol A epoxy resin, 1-10 parts of thermochromic dye, 1-10 parts of heat-sensitive microcapsules, 1-2 parts of a first coupling agent, 1-2 parts of a second coupling agent, 2-3 parts of a wetting agent, 2-3 parts of a cross-linking agent, 1-5 parts of a fluorine compound modifier, 1-2 parts of methyl silane, 1-10 parts of a wax emulsion, and 1-2 parts of a second coupling agent. ‑2 parts, defoaming agent 0.2‑1 parts, leveling agent 0.5‑1 parts, preservative 0.1‑0.5 parts; wherein, the acrylic emulsion, polyurethane emulsion, first coupling agent and wetting agent are fixed in the network structure formed by the cross-linking agent, and the hydrophobic layer formed by the wax emulsion, and the fluorine compound modifier, second coupling agent, and methyl silane are fixed in the three-dimensional network structure formed by the cured epoxy resin. The fixed components interact with each other, effectively improving the adhesion and water resistance of the ink.

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 present invention belongs to the field of polymer materials and their application technology, and discloses a flame-retardant and antistatic hollow board packaging material, as well as its preparation and application. The preparation method comprises the following steps: catalytically polymerizing an epoxysilane monomer, a methylsilane monomer, and a hydrogen silane end-capping agent to obtain a hydrogen-terminated epoxy polysiloxane; then catalytically copolymerizing the reaction with an α,ω diene to obtain an epoxy polysiloxane-modified polyolefin elastomer solution; then adding a reinforcing filler surface-modified with an aminosilane coupling agent and an antistatic agent to react; after the reaction is complete, adding a flame retardant and a foaming agent, mixing, drying, and granulating to obtain a flame-retardant and antistatic hollow board packaging material. The special material of the present invention can be used for flame retardancy, antistatic properties, and reinforcement, toughening, and blending modification of polyolefin hollow board packaging materials.

The invention aims to provide an anaerobic ammonia oxidation reactor carrier, a preparation method thereof and an anaerobic ammonia oxidation reactor. The preparation method of the carrier comprises the following steps: A, preparing a polyvinylpyrrolidone aqueous solution with the mass ratio of (80-120): 1, adding carbon nanotubes into the polyvinylpyrrolidone aqueous solution, and uniformly dispersing to obtain a carbon nanotube dispersion liquid; b, adding the modified lepidolite slag into the carbon nanotube dispersion liquid, and performing ultrasonic dispersion to obtain composite dispersion liquid; c, adding methoxytrimethylsilane into an ethanol solution to obtain a treatment solution; and D, uniformly mixing polyurethane sponge and the composite dispersion liquid according to a mass ratio of 1: (40-60), adjusting the temperature to 70-90 DEG C, carrying out heat preservation stirring for 1-3 hours, then adding the treating fluid, continuously stirring for 3-5 hours, then filtering, placing in a drying oven, and drying to obtain the carrier. The carrier can promote growth and metabolism of microorganisms. The reactor provided by the invention can better treat wastewater with high ammonia nitrogen and high organic matter content.

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%.

The invention discloses an easy-to-clean rubber release agent and a preparation method thereof, and relates to the technical field of release agents. Comprising the following components in parts by weight: 200 to 250 parts of white oil, 10 to 40 parts of methylsilane, 10 to 40 parts of trimethylsiloxy silicon resin, 10 to 25 parts of polydimethylsiloxane, 10 to 15 parts of sodium dodecyl benzene sulfonate, 5 to 8 parts of triethanolamine dodecylbenzene sulfonate, 1 to 3 parts of modified polypropylene wax, 2 to 5 parts of heptadecafluorodecyl triethoxysilane, 1 to 4 parts of a regulator, 0.5 to 2 parts of an emulsifier and 1.5 to 2 parts of a stabilizer. 0.3 to 0.7 part of a catalyst; and 100 to 150 parts of deionized water. According to the invention, sodium dodecyl benzene sulfonate and triethanolamine dodecyl benzene sulfonate are designed, so that the easy-to-clean function of the rubber release agent is realized, the problem that the release agent is difficult to clean is solved, the adhesive force between a mold and a rubber product can be reduced, the demolding efficiency is improved, and the cleaning difficulty of the rubber release agent is reduced.

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 relates to a self-supporting diaphragm as well as a preparation method and application thereof. The self-supporting diaphragm comprises an electrode active material, a conductive agent, polytetrafluoroethylene and a polymethylsilane-olefine acid grafted copolymer in a mass ratio of (88-99): (0.1-10): (0.5-10): (0.1-10); the polymethylsilane-olefine acid grafted copolymer is of a flexible elastic structure and is used for forming a continuous three-dimensional network structure in the self-supporting diaphragm, so that the flexibility and the self-supporting property of the diaphragm are improved; the polytetrafluoroethylene is fiberized in the processing process to form a fiberized three-dimensional structure which is used for enhancing the mechanical strength and the structural stability of the self-supporting membrane; the conductive agent is uniformly distributed in the self-supporting membrane under the dispersion effect of the polymethylsilane-olefine acid graft copolymer to form conductive paths, and the fiberized three-dimensional structure formed by polytetrafluoroethylene is used as a'support 'to connect the conductive paths to construct a conductive network.

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.