894 results about "Platinum catalyst" patented technology

The invention relates to the technical field of power transmission, in particular to a moisture-proof cable which sequentially comprises a conductive wire core, a gradient buffer layer, a dynamic sealing layer, a flexible supporting layer and a self-repairing sheath from inside to outside. A gradient buffer layer; the dynamic sealing layer is of a split type sealing structure formed by an outer ring surface sealing lip and an inner ring surface static sealing belt, the outer ring surface sealing lip is formed by embedding a polytetrafluoroethylene fiber reinforcing layer in a silicone rubber matrix, and the surface of the outer ring surface sealing lip is coated with a humidity response type graphene coating; the flexible supporting layer is formed by spirally winding a nickel-titanium alloy belt, and bionic fish scales are welded to the surface of the nickel-titanium alloy belt; the self-repairing sheath is characterized in that a hexagonal honeycomb structure is molded on the outer layer, hydroxyl-terminated polysiloxane and a platinum catalyst are contained in an A-type microcapsule, and modified epoxy resin is contained in a B-type microcapsule. The moisture-proof cable shows excellent corrosion resistance, moisture resistance and self-repairing capability in a humid environment, and can maintain good performance when subjected to external physical impact.

The invention discloses spherical aluminum oxide and a silicone rubber heat conduction composite material thereof, and belongs to the technical field of functional polymer materials. The spherical aluminum oxide is subjected to surface modification through an amphiphilic fluorosilicone heat conduction interface synergist; comprising the following raw materials in parts by weight: 100-200 parts of vinyl silicone oil, 1-6 parts of side hydrogen-containing silicone oil, 1-6 parts of end hydrogen-containing silicone oil, 0.2-2 parts of a platinum catalyst, 0.01-0.1 part of an inhibitor and 2500-6000 parts of amphiphilic fluorine-silicon heat-conducting interface synergistic spherical aluminum oxide powder. Through surface modification of spherical aluminum oxide, the prepared silicone rubber heat-conducting composite material realizes synergistic gain of heat conduction, insulation and flexibility, and can meet the requirements of multiple fields such as power battery pack heat dissipation gaskets, high-frequency circuit packaging and wearable equipment.

The invention relates to the technical field of silica gel cables, and discloses a silica gel cable with high reliability and high flexibility and a process thereof, and the silica gel cable comprises a conductor layer which is formed by hierarchically twisting a plurality of tinned copper wires with the diameter of 0.05-0.10 mm, and the twisting helical angle gradually changes from 25 degrees in the inner layer to 55 degrees in the outer layer; the insulating layer coats the conductor layer and comprises a silica gel material, a hydrogen-containing silicone oil cross-linking agent and a plasticizer, microcapsules with the particle size of 20-50 microns are dispersed in the silica gel material, a shell layer of each microcapsule is polyurethane, and a core layer of each microcapsule is a siloxane repairing agent containing a platinum catalyst; and a sheath layer. A hydrogen-containing silicone oil cross-linking agent in the insulating layer enables molecular chains to be cross-linked to form a net structure, the physical and chemical stability is enhanced, microcapsules are matched to endow a self-repairing function, a repairing agent is released when the cable is damaged, the self-repairing performance of the insulating layer is further guaranteed, damage is filled through a cross-linking reaction, insulation is recovered, the reliability of the cable is remarkably improved, and the service life of the cable is remarkably prolonged.

The invention relates to the technical field of fuel cells, and provides a preparation method of a fuel cell carbon-supported platinum catalyst, the catalyst and application, the preparation method comprises the following steps: S1, adding a platinum precursor solution and a carbon material into a solvent, dispersing, drying and grinding to obtain catalyst powder A; s2, performing primary microwave treatment on the catalyst powder A under inert gas to obtain catalyst powder B; and S3, mixing and grinding the catalyst powder B and the platinum precursor solid, and carrying out secondary microwave treatment under inert gas to obtain the carbon-supported platinum catalyst. The preparation method has the advantages that through two-step microwave treatment, the particle size of the platinum particles inside and outside the pores of the carbon carrier is accurately controlled under the condition that the high activity of the platinum particles is kept, so that the carbon-supported platinum catalyst has the advantages of high performance, high stability and durability, and meanwhile, the performance of the catalyst is not influenced under the low-humidity working condition.

The invention discloses a preparation method and application of a metal nitrogen-carbon loaded high-load platinum catalyst, and belongs to the field of four-electron oxygen reduction. The method comprises the following steps: firstly, dispersing a synthesized metal carrier in ethylene glycol, carrying out uniform ultrasonic treatment, dropwise adding a chloroplatinic acid solution, continuously carrying out uniform ultrasonic dispersion, dropwise adding sodium hydroxide until the pH value is 11, and stirring for 2 hours; reacting the reaction liquid in an oil bath at 125 DEG C for 3 hours, cooling to room temperature, adding hydrochloric acid to settle the reaction liquid, washing with a large amount of water, and drying in vacuum to obtain the target catalyst. According to the synthesis method, relatively environment-friendly solvents such as methanol and ethylene glycol are used, so that the pollution to the environment is reduced, the used raw materials are relatively cheap, the energy consumption in the preparation process is relatively low, and the production cost of the catalyst is favorably reduced. The prepared catalyst shows excellent oxygen reduction performance and has a good industrial prospect.

The invention discloses a hollow skeleton type drug-loading rod core as well as a preparation method and application thereof. The raw material composition comprises the following components in parts by weight: 1-1000 parts of active pharmaceutical ingredients; 100 parts of R-vinyl silicone rubber; 0.45 to 20 parts of hydrogen-containing silicone oil; more than or equal to 0.000002 parts of a catalyst; the content of vinyl in the R-vinyl silicone rubber is 0.1-0.5 mol%; the content of Si-H groups in the hydrogen-containing silicone oil is 0.18 to 1.6 mol%; the molar ratio of the Si-H group to the vinyl group is (0.5-20): 1. According to the invention, methyl vinyl silicone rubber, hydrogen-containing silicone oil, a platinum catalyst and other components are taken as a basic prescription of silicone rubber, and a model drug and the silicone rubber are mixed by using an extrusion technology to prepare the hollow skeleton type drug-loaded rod core. Advantages of traditional storage type implants and skeleton type implants are integrated, the production process is simple, the medicine application range is wide, the release amount is stable, and the release amount is large.

The invention provides a platinum-carbon catalyst taking hollow carbon nanospheres as a carrier and a preparation method of the platinum-carbon catalyst. The method comprises the following steps: adding a polymer monomer into a nano template dispersion liquid with a uniform size; then adding a proper amount of platinum salt into the solution to obtain a mixed solution, and stirring to react for 0.5-30 hours to obtain a reaction product; and annealing the reaction product, and then removing the nano template to obtain the platinum-carbon catalyst. The obtained platinum-carbon catalyst takes the hollow carbon nanospheres as a carrier and has a larger specific surface area, the platinum catalyst is loaded on the surfaces of the carbon nanospheres and can be in better contact with an electrolyte, and the obtained catalyst has good electrochemical activity and shows excellent electro-catalytic hydrogen evolution performance and oxygen reduction performance; and the related preparation method is simple and reliable, is suitable for preparation of an electrocatalytic hydrogen evolution electrode and an oxygen reduction electrode, and has a good application prospect in the fields of proton exchange membrane electrolytic cells, hydrogen fuel cells and the like.

The invention provides a membrane electrode, a preparation method thereof and a monocell, the membrane electrode comprises a double-cathode catalyst layer, a proton exchange membrane and a gas diffusion layer, the double-cathode catalyst layer comprises a first catalyst layer and a second catalyst layer; the first catalyst layer is connected with the proton exchange membrane, and the second catalyst layer is connected with the gas diffusion layer; the raw materials of the double-cathode catalyst layer comprise a platinum-containing catalyst and an ionomer; the particle size D50 of platinum in the first catalyst layer is smaller than the particle size D50 of platinum in the second catalyst layer. The double-cathode catalyst layer is arranged, and the particle size D50 of platinum in the first catalyst layer is smaller than the particle size D50 of platinum in the second catalyst layer, so that the utilization rate of the material is improved to the maximum extent, the cost is reduced, the performance and the overall durability of the membrane electrode are improved, and the membrane electrode has good development potential.

The invention relates to the technical field of silicone rubber preparation, in particular to high-flame-retardant insulating liquid silicone rubber and a preparation method and application thereof. The high-flame-retardant insulating liquid silicone rubber is prepared from the following raw materials in parts by mass: 60 to 75 parts of vinyl-terminated polydimethylsiloxane, 5 to 8 parts of methylhydrosiloxane, 20 to 24 parts of a flame retardant, 0.1 to 0.2 part of a platinum catalyst, 25 to 30 parts of modified silicon dioxide and 2 to 3 parts of a silane coupling agent, and the flame retardant is prepared by mixing decabromodiphenyl ethane and modified magnesium hydroxide. The high-flame-retardant insulating liquid silicone rubber not only has excellent flame retardance, insulativity, high-temperature-resistant stability and the like, but also has remarkable advantages in mechanical properties and environmental adaptability, and provides safer and more reliable material choices for related fields.

The invention discloses a flexible fireproof cable and a preparation method thereof, and belongs to the technical field of cables. The cable comprises a conductor, a mica insulation layer, a copper protection layer, a buffer layer and a cable sheath layer. The buffer layer is made of a polyurethane foaming material; the cable sheath layer is prepared from the following components in parts by weight: 80 to 100 parts of methyl vinyl silicone rubber, 18 to 20 parts of modified carbon black, 5 to 8 parts of titanium dioxide, 1 to 2 parts of platinum catalyst, 3 to 6 parts of hydroxyl silicone oil, 0.5 to 1 part of zinc stearate and 0.8 to 1 part of dicumyl peroxide. The modified carbon black is added into the raw materials of the sheath layer, so that the compatibility, the interface bonding force and the flame retardant property of the carbon black and a silicone rubber matrix are effectively improved, and the mechanical property, the wear resistance and the fireproof property of the cable sheath layer are remarkably enhanced.

The invention relates to the technical field of cables, in particular to a fire-resistant cable suitable for a fire environment heating condition and a preparation method of the fire-resistant cable. The fire-resistant cable comprises an insulating wire core, a fire insulation layer and a sheath layer which are arranged from inside to outside. The fire insulation layer is made of ceramic silica gel cement; the ceramic silica gel cement is prepared from the following components in parts by weight: 20-40 parts of ceramic silica gel, 100-120 parts of methyl vinyl silicone rubber raw rubber, 30-50 parts of white carbon black, 4-6 parts of glass powder, 30-40 parts of aluminum oxide, 20-30 parts of zinc borate, 1-3 parts of zinc oxide, 30-40 parts of mica powder, 7-10 parts of dimethyl silicone oil and 0.3-0.5 part of a platinum catalyst. According to the invention, the mechanical strength and flexibility of the cable at high temperature are improved, and the high temperature resistance and electrical insulation performance of the fire insulation layer and the insulating layer are enhanced.

The invention discloses a silica gel pad with high thermal conductivity and heat resistance and a preparation method thereof, and the method comprises the following steps: preparing a composite thermal conductive filler, mixing boron nitride nanosheets and graphene according to a certain mass ratio, adding a silane coupling agent, carrying out ball milling, adding spherical alumina, and mixing; preparing modified organic silicon resin, wherein methyl vinyl silicone rubber, hydrogen-containing silicone oil, a platinum catalyst and MQ silicon resin react to obtain the modified organic silicon resin; mixing and defoaming the modified organic silicon resin, the composite heat-conducting filler, the flame retardant and the antioxidant to obtain a heat-conducting silica gel mixture; preparing a reinforced base material, carrying out plasma treatment on glass fiber cloth, and then impregnating the glass fiber cloth with vinyl ester resin for pre-curing; and grinding the mixture by three rollers, coating the mixture on a reinforced base material, and heating and curing. The thermal conductivity of the obtained silica gel pad is 2.5-3.5 W / m.K, the volume resistivity is larger than 1012 omega.cm, the long-term heat-resistant temperature reaches 200 DEG C or above, the tensile strength is larger than 5 MPa, the peel strength is larger than 15 N / cm, and the silica gel pad has excellent thermal conductivity, insulativity, heat resistance and mechanical strength.

The invention belongs to the technical field of adhesive preparation, and particularly relates to a flexible epoxy adhesive modified organic silicon adhesive and a preparation method and application thereof.The flexible epoxy adhesive modified organic silicon adhesive is composed of a component A and a component B, the component A is prepared from 40-70 parts of vinyl-terminated silicone oil, 10-30 parts of hydrogen-containing silicone oil, 5-20 parts of filler, 1-5 parts of coupling agent and 1-10 parts of curing agent; and the component B comprises the following components in parts by weight: 60-70 parts of vinyl-terminated silicone oil, 5-20 parts of epoxy resin, 5-15 parts of a platinum catalyst, 1-5 parts of an accelerant, 1-5 parts of an inhibitor and 5-20 parts of filler. Epoxy resin is introduced into an organic silicon matrix and is matched with a toughening agent and a catalyst, so that efficient combination of a two-phase system is realized, and the adhesive which is stable in performance, high in adhesive force and excellent in flexibility is obtained and has excellent comprehensive performance and application prospects in electronic packaging, automobile part bonding and building sealing.

The invention provides a high-hydrophobicity anti-pollution flashover coating and a preparation method thereof, and relates to the field of coatings. The silicone rubber composition is prepared from the following raw materials in parts by weight: 80 to 100 parts of hydroxyl-terminated polydimethylsiloxane; 5 to 15 parts of modified nano silicon dioxide; 10 to 30 parts of a composite self-repairing microcapsule; 10 to 25 parts of a flame retardant; 3-8 parts of a cross-linking agent; 0.5-2 parts of a catalyst; 1-5 parts of an accelerant; 40 to 100 parts of a solvent; the modified nano silicon dioxide is fumed silica subjected to surface treatment by a fluorine-containing silane coupling agent and a platinum catalyst; the capsule wall of the composite self-repairing microcapsule is a polylactic acid-glycolic acid copolymer, and the capsule core of the composite self-repairing microcapsule is a mixed solution of a hydroxyl-terminated polydimethylsiloxane oligomer and methyltris (methylethylketoximino) silane. The coating has excellent hydrophobicity, weather resistance and targeted repair function.

The invention discloses silicon-based synthetic leather and a preparation method thereof. The synthetic leather comprises base cloth, a silicone rubber layer and a surface treatment layer, wherein the surface treatment layer comprises vinyl-terminated polysiloxane, hydrogen-containing polysiloxane, a reaction inhibitor, a platinum catalyst, silicon dioxide microspheres, hyperbranched vinyl polyurethane and cyclic siloxane; the molar ratio of vinyl in the vinyl-terminated polysiloxane to silicon hydrogen in the vinyl-terminated polysiloxane is 1: (1.05-1.12), and the hyperbranched vinyl polyurethane is prepared by carrying out condensation polymerization on polyol acrylate and isocyanate in the presence of a catalyst and then carrying out end-capping reaction with a vinyl end-capping agent. The formula of the surface treatment layer is optimized, the molar ratio of vinyl to silicon hydrogen is 1: (1.05-1.12), dense vinyl of hyperbranched vinyl polyurethane (HVPUA) reacts with residual Si-H, interface bonding is enhanced by combining amino silane grafting, and silicone oil precipitation is reduced synergistically.

The invention provides a low-compression-stress low-density heat-conducting gasket and a preparation method thereof.The heat-conducting gasket is prepared from, by weight, 100-300 parts of vinyl silicone oil, 1-3 parts of end chain hydrogen-containing silicone oil, 2-6 parts of side chain hydrogen-containing silicone oil, 0.2-0.6 part of platinum catalyst, 300-700 parts of heat-conducting filler, 0.1-0.5 part of coupling agent and 0.1-0.5 part of inhibitor. Wherein the vinyl silicone oil is prepared by matching two kinds of vinyl-terminated polydimethylsiloxane with different viscosities and vinyl contents; and the heat-conducting filler is a ternary combination of spherical aluminum oxide, spherical boron nitride and beta-type silicon nitride with a lubricating function. The preparation method comprises the following steps: adding the raw materials into stirring equipment, controlling the vacuum degree during stirring by adopting staged negative pressure, stirring under the conditions that the negative pressure is less than or equal to-0.095 MPa,-0.06 to-0.07 MPa and less than or equal to-0.095 MPa in sequence, fully mixing the materials, clustering, transferring to a calender, and carrying out high-temperature vulcanization molding at 120-140 DEG C. The heat-conducting gasket has the characteristics of low compression stress and low density, and the production efficiency is remarkably improved.

The invention relates to the field of new energy battery buffer parts, in particular to an anti-static foaming silica gel buffer part for a new energy battery and a preparation method of the anti-static foaming silica gel buffer part. The anti-static foaming silica gel buffer part is prepared by mixing and foaming anti-static mixed rubber, a foaming agent, hydrogen-containing silicone oil, an inhibitor and a platinum catalyst, the anti-static rubber compound is prepared from the following raw materials in percentage by weight: 37-50% of methyl vinyl silicone rubber raw rubber, 38-45% of white carbon black, 8-15% of anti-static filler and 1-3% of hydroxyl silicone oil; the antistatic filler is composed of an antistatic agent and a silane-containing active agent; the antistatic agent is composed of acetylene carbon black and a single-walled carbon nanotube. Under the action of the silane-containing active agent, the acetylene carbon black and the single-walled carbon nanotubes are interwoven to form a stable supporting antistatic skeleton structure, so that static electricity can be effectively conducted, static electricity accumulation is avoided, the structure is kept stable in long-term use, and the compression resilience and antistatic durability of the buffer part are ensured.

The invention discloses a bi-component heat-conducting gel and a preparation method and application thereof, the bi-component heat-conducting gel comprises a component A and a component B. The component A comprises the following components in parts by mass: 100 parts of vinyl silicone oil A; 500 to 1500 parts of a heat conducting filler A; 1000 to 2000 parts of diamond with a core-shell structure; 0.5 to 10 parts of a coupling auxiliary agent A; 0.1-5 parts of a platinum catalyst; the component B comprises 100 parts of vinyl silicone oil B; 10 to 25 parts of hydrogen-containing silicone oil; 500 to 1500 parts of a heat conducting filler B; 1000 to 2000 parts of diamond with a core-shell structure; 0.5 to 10 parts of a coupling auxiliary agent B; 0.01 to 2 parts of an inhibitor; wherein the shell layer of the core-shell structure diamond is a magnesium hydroxide layer, and the inner core of the core-shell structure diamond is diamond. The bi-component heat-conducting gel disclosed by the invention has excellent heat-conducting property, low friction coefficient and low abrasion to equipment or elements in an application process.

The invention discloses low-cost double-network fluorinated silicone rubber and a preparation method thereof, and relates to the technical field of fluorinated silicone rubber. The double-network fluorosilicone rubber comprises the following raw materials: vinyl silicone resin, vinyl fluorosilicone resin, hydrogen-containing fluorosilicone oil, a solubilizing monomer, a multifunctional acrylate monomer, a reinforcing filler, a structured control agent, a free radical thermal initiator, a platinum catalyst and an inhibitor. The double-network fluorosilicone rubber is formed by constructing a carbon-carbon chain network and a siloxane network, the tensile strength, toluene swelling resistance and ATF oil resistance at the high temperature of 150 DEG C of the fluorosilicone rubber are obviously improved, the preparation cost of the fluorosilicone rubber is reduced, and a favorable support is provided for widening the application field of the fluorosilicone rubber.

The invention discloses a mineral oil defoaming agent for water-based paint ink and a preparation method of the mineral oil defoaming agent, and belongs to the technical field of defoaming agents. A hydroxyl-terminated butenyl polymer and hydrogen-containing silicone oil are used for preparing a modified butenyl polymer under the condition of a platinum catalyst; and preparing the mineral oil defoaming agent from the obtained modified butenyl polymer, mineral oil, white carbon black, fatty acid metal soap and wax under the action of an emulsifier. The mineral oil defoaming agent prepared by the invention not only has the advantage of high defoaming speed of a conventional mineral oil defoaming agent, but also has improved compatibility and stability, is a defoaming agent with strong defoaming ability, good foam inhibition performance, good compatibility with paint and ink and reduced coating shrinkage phenomenon, and has good application prospects in the fields of paint and ink. The method has a wide application prospect especially in the field of home decoration water-based paint ink.

The invention discloses a heat-proof skirt which is of a single-layer or multi-layer structure, each single-layer material is formed by compositing quartz fiber cloth and coating when multiple layers are arranged, the heat-proof skirt is made of 6-8 single-layer materials, and the skirt edge is in a wave shape. The coating is prepared from the following raw materials in parts by weight: 4 to 6 parts of vinyl polysiloxane, 15 to 20 parts of hydrogen-containing silicone oil, 15 to 20 parts of ammonium polyphosphate, 10 to 15 parts of aluminum hydroxide, 5 to 8 parts of silicon dioxide, 0.005 to 0.02 part of a platinum catalyst and 30 to 40 parts of a solvent. The heat-proof skirt has contractility, and the influence on normal swinging resistance of the engine is reduced to the maximum extent.

The invention discloses a vanadium oxide-based supported platinum catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: a) carrying out high-temperature heat treatment on a V precursor to obtain orange V2O5 carrier powder; b) adding V2O5 powder, a Pt metal precursor and a sacrificial reagent into the solution, carrying out ultrasonic treatment, stirring, and reacting under the irradiation of a xenon lamp to obtain a dark brown suspension; c) centrifuging, washing, drying, grinding and roasting the dark brown suspension to obtain dark brown powder; and d) carrying out three times of high-temperature heat treatment on the dark brown powder under different protective gases, and sequentially carrying out three processes of oxidation, reduction and partial oxidation to obtain the vanadium oxide-based platinum-loaded catalyst. The catalyst prepared according to the invention is applied to a carbon monoxide oxidation reaction, and has the advantages of excellent catalytic performance, long-time stability and good recycling stability at a high space velocity.

The invention discloses two-component addition type low-density liquid foaming silicone rubber and a preparation method thereof, and belongs to the technical field of silicone rubber preparation. Comprising a component A and a component B, the component A is prepared from the following components in parts by weight: 50 to 70 parts of vinyl terminated polysiloxane, 10 to 20 parts of vinyl hydroxyl silicone oil, 0.5 to 2 parts of platinum catalyst, 15 to 25 parts of HGM (at) PN-rGO / APP and 3 to 8 parts of methyl vinyl MQ resin; the component B is prepared from the following components in parts by weight: 50 to 60 parts of vinyl-terminated polysiloxane, 8 to 15 parts of hydrogen-terminated hydrogen-containing silicone oil, 10 to 20 parts of methyl-terminated hydrogen-containing silicone oil, 5 to 10 parts of hydroxyl-terminated silicone oil, 0.002 to 0.01 part of an inhibitor, 10 to 20 parts of fumed silica and 1 to 3 parts of a tackifier. The synergistic components in the HGM-coated PN-rGO / APP can greatly improve the flame retardant property of the silicone rubber, improve the compression strength and reduce the heat release rate at the same time.

Novel compositions and systems for closure of wounds with antimicrobial effectiveness are disclosed. The compositions provide devices of improved flexibility and elasticity and are readily applied to wound sites or over wound closure devices. The present invention is also directed to a novel platinum catalyst for use in such compositions. The catalyst provides for rapid curing on topical surfaces such as skin and bonds to such surfaces in about 2-5 minutes.

The invention discloses high-temperature-resistant fluorine-modified estersil and a preparation method thereof, and relates to the technical field of organosilicon materials.The high-temperature-resistant fluorine-modified estersil comprises a group A and a group B. The group A serves as a main base material and functional filler and is used for providing a film-forming framework and the high-temperature-resistant characteristic; the group B is a cross-linking curing unit and is used for regulating and controlling the reaction rate and the final cross-linking density; the component A comprises the following raw materials: a fluorine-terminated vinyl estersil prepolymer, a vinyl estersil diluent, surface fluorinated nano silicon dioxide, spherical aluminum oxide, an antioxidant and a defoaming agent; the component B comprises the following raw materials: a hydrogen-containing silyl ester cross-linking agent, a platinum catalyst and an inhibitor. A fluorine-terminated structure is introduced into a vinyl estersil prepolymer, and surface fluorinated nano silicon dioxide and spherical aluminum oxide are adopted for synergistic filling, so that the thermal stability and interface bonding force of the material are improved; the obtained high-temperature-resistant fluorine-modified estersil can still keep excellent mechanical strength and electrical insulation performance under the condition of 250-300 DEG C, and has the characteristics of low surface energy and pollution resistance at the same time.

The invention relates to the field of flame retardants, in particular to flame-retardant silicon rubber, an organic silicon rubber flame-retardant aid and a preparation method. The flame retardant comprises the following components in parts by weight: 100 parts of polysiloxane; 50 to 400 parts of zinc-containing powder; 1-8 parts of a silane treating agent; and 100 to 2000 ppm of a platinum-containing compound. A platinum-containing compound, zinc-containing powder and a silane coupling agent are dispersed into polysiloxane to prepare paste, the ceramic forming ability of a platinum-containing catalyst is enhanced through the zinc-containing powder and the silane coupling agent, and the flame retardant effect of the platinum-containing compound is improved.

The invention relates to the technical field of organic silicon materials, and discloses high-thermal-conductivity low-dielectric organic silica gel and a preparation method and application thereof.The high-thermal-conductivity low-dielectric organic silica gel is prepared from a component A and a component B. The component A is prepared from, by weight, 35-45 parts of vinyl polysiloxane, 40-50 parts of vinyl silicone resin, 5-20 parts of modified boron nitride, 0.75-1.25 parts of a flatting agent, 1.5-2.5 parts of a defoaming agent and 0.05-0.15 part of a platinum catalyst; and the component B comprises the following components in parts by weight: 15-20 parts of vinyl polysiloxane, 60-85 parts of hydrogen-containing silicone oil and 0.05-0.15 part of an inhibitor. According to the scheme, a continuous and effective 3D heat conduction network is constructed through modified boron nitride, the heat conduction performance of the organic silica gel is improved, meanwhile, covalent interaction is formed between the modified boron nitride and other matrixes, interface bonding is high, the dipole polarization effect at an interface is reduced, the dielectric constant is reduced, and the organic silica gel is quite suitable for the field of electronic packaging.

The present invention discloses a waterborne polyurethane and silica gel composite biomimetic material, its preparation method and application, belonging to the technical field of biomimetic skin. The biomimetic material includes a silica gel layer and a polyurethane layer. The material of the silica gel layer includes two-component silica gel, and the material of the polyurethane layer includes double-bond terminated waterborne polyurethane. The preparation method of the biomimetic material is as follows: Spray the double-bond terminated waterborne polyurethane into a mold, heat and dry it to obtain a polyurethane layer; Spray a platinum catalyst on the surface of the polyurethane layer, then mix the A component and B component of the two-component silica gel evenly and pour them into the mold, oscillate and level them, and cure and form to obtain the waterborne polyurethane and silica gel composite biomimetic material; The biomimetic material has the characteristics of high peel strength, good environmental performance, good folding resistance, high wear resistance, good heat resistance, etc., and especially has a baby-like skin-friendly touch, and has broad application prospects in artificial skin, soft robots, wearable devices, prosthetic epidermis, etc.

The invention relates to the technical field of foaming materials, and particularly discloses a silicone rubber foaming material and a preparation method thereof. The silicone rubber foaming material is prepared from the following raw materials in parts by weight: 1-60 parts of hydroxyl silicone oil, 10-60 parts of vinyl silicone oil, 1-15 parts of hydrogen-containing silicone oil, 1-5 parts of methyl silicone oil, 0.5-1 part of an inhibitor, 0.25-0.5 part of a platinum catalyst, 5-15 parts of modified polysiloxane and 10-30 parts of white carbon black. The invention also provides a preparation method of the composition. Compared with the prior art, the silicone rubber foaming material prepared by the invention does not contain halogen and other harmful substances, does not cause secondary pollution in a combustion process, and can realize efficient balance of mechanical properties and flame retardant properties.

The invention discloses a solvent-free dealcoholization type anti-pollution flashover coating containing a hyperbranched cross-linking agent and a preparation method of the solvent-free dealcoholization type anti-pollution flashover coating, and belongs to the technical field of coatings. The solvent-free dealcoholization type anti-pollution flashover coating is prepared from the following components in parts by mass: 80 to 100 parts of alkoxy silicone oil, 40 to 75 parts of filler, 3 to 7 parts of hyperbranched cross-linking agent, 0.2 to 0.5 part of catalyst, 1 to 3 parts of curing accelerator, 0.5 to 3 parts of coupling agent and 60 to 100 parts of structure control agent, wherein the hyperbranched cross-linking agent is prepared from vinyl trimethoxy silane and trimethoxy hydrogen silane through a cross-linking reaction under the action of an oxidizing agent and a platinum catalyst. The self-made hyperbranched cross-linking agent is added into the solvent-free dealcoholization type anti-pollution flashover coating, so that the mechanical property of the coating can be effectively improved, and the coating has excellent electrical property, meets the requirements of spraying construction and meets the comprehensive performance requirements of the anti-pollution flashover coating.