8008 results about "Silicone oil" patented technology

The invention discloses a loess tunnel surrounding rock deformation monitoring method, and relates to the technical field of civil engineering and geological engineering, and the method comprises the steps: integrating a spiral winding type optical fiber sensor, a double-cavity humidity compensation vibrating wire sensor and a microseismic array, and capturing surrounding rock strain, vibration and geological activities; the vibrating wire sensor suppresses humidity interference through a silicone oil damping medium and self-adaptive excitation frequency, and the optical fiber sensor is fixed through a pre-embedded silica gel sleeve to adapt to surrounding rock deformation; edge computing nodes are deployed on the inner wall of the tunnel, an FPGA chip and a lightweight GRU model are integrated, optical fiber strain, a micro-seismic energy spectrum and laser point cloud displacement field data are fused in real time, the strain gradient is analyzed, and a crack propagation probability cloud picture is generated; redundant optical fiber link switching is combined with a six-degree-of-freedom mechanical arm to realize breakpoint self-repairing, and a self-cleaning air curtain is integrated to inhibit dust adhesion; and constructing a geological parameter library based on a BIM-GIS fusion platform, driving a finite element-discrete element coupling model to dynamically update boundary conditions, and predicting surrounding rock deformation and collapse risks.

The invention discloses silver-nickel conductive paste for a BC battery and a preparation method of the silver-nickel conductive paste, and belongs to the technical field of photovoltaic batteries. The silver paste comprises the following raw materials in percentage by weight: 39-69% of micron silver powder, 20-50% of modified nickel, 2-6% of glass powder, 0.1-10% of a dispersing agent, 0-1% of silicone oil and the balance of an organic carrier, the modified nickel is simple substance nickel powder subjected to modification treatment, and the modification treatment mode is surface organic modification and ball milling modification or surface inorganic modification and ball milling modification. The nickel powder is adopted to replace part of silver powder, the prepared conductive silver nickel paste is used for a BC battery, the cost is remarkably reduced, the reliability is high, and the conversion efficiency is superior to or equivalent to that of traditional all-silver electrode paste.

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 low-dielectric heat-conducting functional materials, in particular to a nano silicone rubber composite material as well as a preparation method and application thereof. According to the preparation method, a modified vinyl silsesquioxane coupling agent is taken as a bridge, and boron nitride nanosheets, silicon carbide nanowires and the modified vinyl silsesquioxane coupling agent are covalently connected through hydrolysis reaction, so that a heterostructure is constructed, and the nano heat-conducting filler is obtained; the preparation method comprises the following steps: dispersing a nano heat-conducting filler in vinyl silicone oil, and constructing a covalent cross-linked network through addition cross-linking reaction and curing treatment to obtain the nano composite silicone rubber material. According to the processing method, the filling amount, the dielectric constant and the dielectric loss can be reduced, meanwhile, the heat conduction capacity is improved, and the problems that in the prior art, the dielectric constant and the dielectric loss are low due to simple mixing of the boron nitride nanosheets and the silicon carbide nanowires are solved.

The invention belongs to the technical field of flame retardants, and particularly relates to a high-thermal-stability polyphosphate flame retardant and a preparation method thereof. The DOPO is modified through the polyethylene glycol acrylate, methyl methacrylate and dicumyl peroxide composite solution, double bonds of the polyethylene glycol acrylate and P-H bonds of the DOPO can be subjected to nucleophilic addition to form stable C-P bonds, and thermal migration of the DOPO is hindered; dOPO has polymerization double bonds of methyl methacrylate and long carbon chains of polyethylene glycol acrylate, so that the compatibility of the polyphosphate flame retardant and a polymer substrate is improved, and phase separation is avoided; maleic anhydride grafted silicone oil is connected to the surface of an amino modified gamma-cyclodextrin-modified DOPO inclusion compound, so that the polyphosphate flame retardant has high thermal stability and high compatibility after long-chain alkyl modification; amino groups in the modified gamma-cyclodextrin react with maleic anhydride grafted silicone oil to generate an amido bond cross-linked network, so that the thermal migration of DOPO is reduced together, and the high thermal stability of the polyphosphate flame retardant is improved.

The invention discloses one-step solvent-free methyl phenyl-terminated vinyl polysiloxane and silica gel, and the methyl phenyl-terminated vinyl polysiloxane is prepared by the following steps: adding octamethylcyclotetrasiloxane, octaphenylcyclotetrasiloxane and dimethyl-terminated vinyl silicone oil into a reaction container, and uniformly stirring; vacuumizing the reaction container, and introducing nitrogen to form an oxygen-free environment; heating the reaction container to 180-200 DEG C step by step, and adding a catalyst at 50-80 DEG C; the step-by-step heating comprises a first-stage pre-polymerization reaction at the temperature of 90 DEG C or below and a second-stage polymerization reaction at the temperature of 90 DEG C or above, and methyl phenyl vinyl-terminated polysiloxane is prepared. The high-temperature-resistant and high-pressure-resistant methyl phenyl silica gel is obtained by mixing methyl phenyl vinyl-terminated polysiloxane with an inhibitor, a cross-linking agent and a cross-linking catalyst, degassing, heating, cross-linking and curing, the performance requirements of high-power semiconductor devices on high-pressure resistance, high-temperature resistance and the like of packaging materials can be met, the product quality is stable, and the production efficiency is high.

The invention discloses a process for preparing graphene doped silicone rubber foam through supercritical foaming and silicone rubber foam, the process comprises the following steps: S1, adding methyl vinyl silicone rubber, fumed silica, hydroxyl silicone oil and reduced graphene oxide into an internal mixer, mixing while heating, and aging at normal temperature to obtain a rubber compound 1; s2, adding the rubber compound 1 and a vulcanizing agent into an internal mixer, and mixing at normal temperature to obtain a rubber compound 2; s3, the rubber compound 2 is placed in a press vulcanizer to be pre-vulcanized, and a to-be-foamed product is obtained; and S4, putting the to-be-foamed product into a supercritical foaming device for foaming, then heating and drying foam obtained after foaming, and then carrying out heat treatment to obtain the final graphene-doped silicone rubber foam. According to the invention, many defects in the prior art are successfully overcome, the silicone rubber foam with high strength, good thermal conductivity, excellent buffer performance, low density, high hardness and environmental friendliness is prepared, and the silicone rubber foam has a wide application prospect.

The invention relates to a mildew-proof silicone sealant with high curing rate and high adhesive strength, and belongs to the technical field of adhesives. The anti-mildew coating is prepared from alpha, omega-dihydroxy polydimethylsiloxane, dimethyl silicone oil, fumed silica, phenoxy resin coated nano calcium carbonate, a modified hydroxypropyl-gamma-cyclodextrin loaded mildew preventive, dibutyltin dilaurate, methyltrimethoxysilane and a curing accelerator. According to the mildew-proof silicone sealant with the high curing rate and the high adhesive strength, the surface drying time is 9-13 minutes, the 24-hour curing depth is 6.3-7.2 mm, the adhesive strength is 3.0-3.6 MPa, the tensile strength is 5.8-6.4 MPa, the shear strength is 3.0-3.9 MPa, the elongation at break is 410-457%, and the mildew-proof grade is 0 grade in 30 days, 60 days, 180 days and 360 days.

The invention relates to the field of textile materials, and provides an antibacterial breathable yarn obtained by blended spinning of polyester fibers, polyamide fibers, cotton fibers and elastic fibers. The polyester fiber is prepared through melt blending and spinning processes and comprises polyethylene glycol terephthalate slices, modified chitosan zinc oxide, an antioxidant 1010, a POE elastomer, polyether modified silicone oil and polyethylene glycol 200, and the modified chitosan zinc oxide is prepared by compounding chitosan cinnamyl aldehyde Schiff base and silane modified zinc oxide. The chitosan cinnamyl aldehyde Schiff base is prepared through a Schiff base condensation reaction of chitosan and cinnamyl aldehyde, and the silane modified zinc oxide is prepared from nano rod-shaped zinc oxide particles modified by isocyanate propyl triethoxy silane. The yarn has excellent antibacterial property, air permeability and flexibility and is further used for knitting antibacterial breathable socks, the knitting density of the sock bottom part is reduced to enhance the air permeability, the knitting density of the sock opening part is improved to improve the elasticity and the fitting degree, and the yarn has wide application value.

The invention relates to the technical field of daily chemicals, and provides shampoo and a preparation method and application thereof.The shampoo is prepared from, by mass, 3%-15% of a sulfate-free anionic surfactant, 8%-20% of an ampholytic surfactant, 0-5% of a nonionic surfactant, 0.3%-1% of a hair cationic conditioner and 0.1%-3% of emulsified silicone oil based on the total mass of the shampoo; the cationic conditioner for hair comprises a polyquaternium cationic polymer and cationic guar gum, and the mass ratio of the polyquaternium cationic polymer to the cationic guar gum is (1: 2)-(2: 1). According to the application, the polyquaternium cationic polymer and the cationic guar gum are selected as the cationic conditioner for hair, and the sulfate-free anionic surfactant and the emulsified silicone oil are matched, so that mild cleaning of scalp can be realized, water-oil balance of the scalp can be maintained, damage to hair scales can be reduced, and the combability and fluffy effect of the hair can be improved.

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 discloses a film-forming composition and a lip makeup product containing the same. The film-forming composition comprises the following components: phenyl silicone oil, wherein the phenyl silicone oil comprises two or more than two of diphenyl polydimethylsiloxane, trimethyl pentaphenyl trisiloxane, phenyl polytrimethyl siloxane and trimethyl siloxy phenyl polydimethylsiloxane; the viscosity of the phenyl silicone oil at the temperature of 25 DEG C is 50 mPa.s to 500 mPa.s; the film-forming agent comprises at least one of hydrogenated polyisobutene and polyisobutene; and the viscosity of the film forming agent at 75 DEG C is 1500 mPa.s to 2500 mPa.s. The mass ratio of the phenyl silicone oil to the film-forming agent is (2-5): 1. The film-forming composition provided by the invention is applied to a formula system of a lip makeup product, and the phenomena of cup staining, fading and the like of the lip makeup product can be reduced.

The invention relates to a high-temperature-resistant welding slag-resistant cable sheath material, and belongs to the technical field of sheath material preparation. The sheath material is prepared from the following raw materials in parts by weight: 80 to 100 parts of TPU, 20 to 40 parts of modified montmorillonite, 18 to 35 parts of cross-linked resin, 0.1 to 1.5 parts of a processing auxiliary agent, 2 to 6 parts of an assistant cross-linking agent and 0.1 to 0.5 part of a reaction type catalyst, the cross-linked resin is prepared by mixing hexamethylene diisocyanate tripolymer and alcoholic hydroxyl group double-terminated silicone oil according to a molar ratio of (1-1.5): 1 in a first organic solvent and under an organic tin catalyst and reacting. Through introduction of the modified montmorillonite, the cross-linked resin and the assistant cross-linking agent, an interpenetrating network is formed in the composite material, and through triple high-temperature-resistant modification of the high-temperature-resistant characteristic of the montmorillonite, the high-temperature-resistant property of a silane chain and the temperature-resistant property of the interpenetrating cross-linked network, the obtained composite material can resist the temperature of a welding slag spot, so that the service life of the composite material is prolonged. And the surface of the material is not melted.

The invention belongs to the technical field of silica gel foam materials, and particularly relates to high-reflection, high-temperature-resistant and heat-insulating ceramic silica gel foam and a preparation method of the high-reflection, high-temperature-resistant and heat-insulating ceramic silica gel foam. The ceramic silica gel foam is obtained by mixing vinyl silicone oil, fumed silica, a platinum catalyst, an inhibitor, hydroxyl silicone oil, hydrogen-containing silicone oil and a composite filler and then performing vulcanization treatment. Wherein the composite filler is composed of a heat reflection filler, a heat-resistant agent, hollow glass beads and low-melting-point glass powder, and each filler is white or transparent; the molar ratio of Si-H groups in the hydrogen-containing silicone oil to Si-OH groups in the hydroxyl silicone oil is (4-6): 1. Through formula design, the silica gel foam has high reflection capability and low heat conductivity coefficient, can keep a complete heat reflection surface at high temperature, is not easy to crack, effectively prolongs the high temperature resistance and heat insulation capability, and is suitable for battery thermal runaway protection. Meanwhile, the compression stress curve of the silica gel foam is gentle, and the silica gel foam has excellent buffering performance.

The present invention relates to the technical field of coatings. Disclosed are a coating composition having mold-proof and antibacterial properties and a preparation method therefor. The coating composition comprises the following raw materials: an acrylic resin emulsion, a curing agent, a coalescing agent, a defoaming agent, and a leveling agent, wherein the acrylic resin emulsion is prepared from an acrylate monomer, a cross-linking agent, and fluorine-containing silicone oil by means of free radical polymerization under the action of an initiator. A gemini-type quaternary ammonium salt functional group in the structure of the cross-linking agent can enable the coating to have good mold-proof and antibacterial effects, the presence of the ether bond can enable the coating to have better adhesive force, and the presence of the fluorine-containing silicone oil can enable a coating film formed by curing the coating to have a super-hydrophobic surface, thereby avoiding surface moisture which promotes bacterial growth and reproduction, and endowing the coating with antifouling and self-cleaning effects. In addition, the silicon-oxygen bond in the silicone oil can effectively enhance the heat resistance of the coating, thereby facilitating further application of the coating in indoor decoration.

The invention relates to the technical field of intelligent materials, in particular to low-temperature-resistant magnetorheological fluid and a preparation method thereof.The low-temperature-resistant magnetorheological fluid is prepared from, by weight, 60-75 parts of magnetic particles; 3 to 15 parts of modified magnetic particles; 10-25 parts of low-temperature-based carrier liquid, which comprises 40-60% of silicone oil and / or mineral oil, 20-30% of synthetic ester and 10-20% of poly-alpha-olefin; 0.1 to 1.0 part of a dispersant; 0.5 to 2.0 parts of an anticoagulant; wherein the modified magnetic particles are prepared by coating magnetic particles with SiO2 aerogel and grafting the coated magnetic particles with fluorine-containing silane; the preparation method comprises the steps that magnetic particles are sequentially subjected to silane coupling agent treatment, aerogel deposition and fluorine-containing silane gas-phase grafting, and modified magnetic particles are prepared; carrying out ultrasonic mixing on the base carrier liquid and an anticoagulant at 40-60 DEG C for 30 minutes; adding magnetic particles, modified magnetic particles and a dispersing agent, dispersing by adopting a micro-jet homogenizer, and then carrying out gradient cooling treatment. The low-temperature-resistant magnetorheological fluid has the effect of improving the low-temperature-resistant performance of the magnetorheological fluid.

The invention relates to the field of flame-retardant silicone rubber, and particularly discloses high-flame-retardant ceramic silicone rubber and a preparation method thereof. The high-flame-retardant ceramic silicone rubber is prepared from the following raw materials in parts by weight: 100 parts of silicone rubber, 10 to 20 parts of hydroxyl silicone oil, 5 to 10 parts of vulcanizing agent, 20 to 40 parts of low-melting-point glass powder, 3 to 5 parts of plasticizer, 2 to 7 parts of coupling agent, 10 to 20 parts of ceramic forming aid, 15 to 25 parts of white carbon black, 10 to 30 parts of modified expansible graphite and 10 to 20 parts of hydrophobic modified silicon dioxide aerogel. The silicone rubber comprises methyl vinyl silicone rubber and liquid silicone rubber in a mass ratio of 1: 0.5; the modified expandable graphite is prepared from expandable graphite, halloysite, dodecyl trimethyl ammonium bromide and hexadecyl trimethyl ammonium bromide according to the mass ratio of 10 to (1 to 2) to (0.1 to 0.2) to (0.1 to 0.2). The ceramic silicone rubber disclosed by the invention is good in high-temperature resistance, strong in flame-retardant capability and high in ceramic forming strength.

The invention provides a vehicle control method and device and a vehicle, the vehicle is provided with a silicone oil fan and a condensation fan, and the method relates to the field of vehicles. The method comprises the steps that if it is detected that a vehicle is switched from a high-load working condition to a parking working condition, the current parking state and the cabin temperature of the vehicle are obtained; based on the current parking state and the cabin temperature, the target rotating speed of an engine of the vehicle and the target duty ratio of a condensation fan are determined; controlling the silicone oil fan to operate through the target rotating speed, and controlling the condensation fan to operate through the target duty ratio so as to reduce the cabin temperature. According to the method, the control flexibility of the cooling fan in the vehicle can be improved, so that the cooling efficiency of a cabin is improved.

The invention provides a preparation method of a solvent-free defoaming agent with good stability, which comprises the following steps: (1) in a nitrogen atmosphere, mixing 60-70 parts by mass of allyl-terminated polyether, 8-10 parts by mass of antioxidant and 0.2-0.6 part by mass of platinum catalyst, heating to 55-58 DEG C, and uniformly stirring to obtain a mixture A; (2) adding 30-40 parts by mass of hydrogen-containing silicone oil and 4-9 parts by mass of a 4A molecular sieve into the mixture A, keeping the temperature at 80-100 DEG C, and stirring at a constant temperature for 2-3 hours to obtain a mixture B; and (3) adding 10-14 parts by mass of modified filler into the mixture B, and stirring for 30-50 minutes to obtain the solvent-free defoaming agent. The defoaming performance of the defoaming agent is improved by using specific raw material composition and proportion; by adding the modified filler, the defoaming agent can be better dispersed in a water-based or oil-based system, so that the use efficiency of the defoaming agent is improved.

The invention discloses a silicone oil clutch fan control method and device. The method comprises the steps that an engine air inlet temperature signal, a fan actual rotating speed signal, an engine cooling water temperature signal, an engine torque signal and an engine rotating speed signal are obtained; according to the engine air inlet temperature signal and the fan actual rotating speed signal, the engine air inlet temperature and the fan actual rotating speed are determined; according to the engine torque signal, the engine rotating speed signal and the cooling water temperature signal, the fan duty ratio needed by water outlet temperature cooling is determined, and according to the air inlet temperature signal, the fan duty ratio needed by air temperature cooling is determined; and determining a target fan duty ratio according to the fan duty ratio required for water temperature cooling and the fan duty ratio required for temperature cooling, determining a target rotating speed according to the target fan duty ratio, and controlling the fan to be adjusted to the target rotating speed from the actual rotating speed of the fan. The problems that in the prior art, due to the fact that an electronic control silicone oil clutch fan is imperfect in control strategy, heat of an engine is prone to being accumulated, cooling is not timely, oil consumption is high, and the engine breaks down are solved.

The invention discloses an anti-pollution flashover coating with arc durability, which comprises the following components in parts by weight: 100 parts of hydroxyl-terminated polydimethylsiloxane, 10-25 parts of dimethyl silicone oil, 5-15 parts of a phosphorus flame retardant, 8-20 parts of white carbon black, 5-15 parts of modified mica powder, 15-30 parts of modified calcium carbonate, 10-20 parts of modified glass powder, 5-12 parts of aluminum hydroxide, 5-10 parts of 1, 3-butanediol, 5-10 parts of a flame retardant, 1-5 parts of an anti-aging agent, 1-5 parts of an anti-aging agent, and 1-5 parts of an anti-aging agent. The invention discloses a high-temperature-resistant coating which is prepared from the following components in parts by weight: 0.5-2 parts of 1, 2-bis (trimethoxysilyl) ethane, 5-10 parts of potassium titanate whiskers, 2-6 parts of color paste, 50-150 parts of a solvent, 3-10 parts of a cross-linking agent, 2-6 parts of a silane coupling agent and 1-5 parts of a catalyst. The invention also provides a preparation method of the anti-pollution flashover coating with arc durability. By introducing the modified mica powder, the modified glass powder and the modified calcium carbonate with specific particle sizes and reasonable gradation, the proportion of the filler in the base rubber is ensured, so that the modified mica powder, the modified glass powder and the modified calcium carbonate form a compact and firm ceramic high-temperature-resistant and arc-resistant layer after encountering high temperature of an arc; and the purpose of improving the arc durability is achieved.

The invention discloses a temperature-resistant high-strength powder coating and a preparation method thereof, and belongs to the field of coatings. The invention relates to a temperature-resistant high-strength powder coating which is prepared from the following raw materials in percentage by weight: 40-50% of epoxy resin; 20-30% of polyester resin; 6-10% of a curing agent; 1-3% of a leveling agent; 1-2% of a filler; and the balance of pigment. According to the polyester resin, aliphatic diisocyanate reacts with polyether polyol and hydroxyl silicone oil to obtain a polyurethane prepolymer, and then the polyurethane prepolymer reacts with vinyl benzylamine, an acrylate monomer and an acrylic monomer to obtain the polyester resin. The powder coating has the advantage that the temperature resistance and the strength of the powder coating are improved.

The invention relates to the field of flame retardants, and provides a sepiolite-based flame retardant and a preparation method thereof, the sepiolite-based flame retardant comprises the following raw materials by weight: 30-50 parts of antimony trioxide, 10-20 parts of modified sepiolite, 4-10 parts of a heat stabilizer, 10-20 parts of methyl silicone oil, and 0.5-4 parts of a dispersant. The sepiolite-based flame retardant provided by the invention has good flame retardance and smoke suppression performance, and has better commercial application value.

The utility model relates to a reaction device capable of quickly heating, cooling and maintaining temperature. According to the reaction device, a three-way valve temperature control device consisting of a set of thermal medium circulator, a set of cold medium circulator, a control unit and two temperature control adjusting motor control three-way valve rotating devices is arranged on the reaction kettle, so that the temperature of the reaction kettle of the reaction device can be increased or decreased within half a minute (even shorter time); the problem that the reaction kettle cannot be rapidly heated and cooled in the reaction process is solved; for heat absorption and heat release experiments, the dynamic balance of the temperature can be maintained by setting a fixed reaction temperature; installation is simple, and operation is convenient; the problem of waste of water resources is solved; the temperature control range is wide, and when a water medium is used, the temperature control range is 1-95 DEG C; when a silicone oil medium is used, the temperature control range is-50 to 250 DEG C; the rotatable distillation head is mounted at the upper part of the reaction kettle and is directly rotated during use, so that the functions of condensation reflux and distillation extraction can be simultaneously realized.

The invention belongs to the technical field of heat-conducting materials, and provides liquid metal-based composite heat-conducting silicone grease as well as a preparation method and application thereof. The modified silicone oil, the liquid metal, the heat-conducting auxiliary filler and the hydrophobic fumed silica in a specific ratio are used as main components of the liquid metal-based composite heat-conducting silicone grease, and the liquid metal-based composite heat-conducting silicone grease prepared by the invention has high heat conductivity coefficient (up to 6.05-10.0 W / mk) and low heat resistance (as low as 0.01-0.03 DEG C * cm < 2 > / W), can maintain a good appearance in double-85, high temperature 125 DEG C and temperature cycle aging tests, and has a wide application prospect. Therefore, the structure is suitable for an assembly interface of a power module and a radiator with high-power heat dissipation requirements, and the heat dissipation efficiency is improved.

The invention provides a polyurethane material for leaking stoppage of coal mine spraying and a preparation method thereof, and belongs to the technical field of polyurethane. The preparation method comprises the following steps: pretreating a multi-walled carbon nanotube, coupling phytic acid and a silane coupling agent, reacting with UiO-66-NH2, coating the surface with a graphene oxide layer, mixing with polyether polyol, a catalyst and an antistatic agent, adding into water, adding a foaming agent and silicone oil, heating, stirring and mixing, transferring into a mold, adding diisocyanate, and after foaming is completed and the temperature of the material is reduced to room temperature, carrying out extrusion molding to obtain the composite material. And drying, heating and curing to obtain the polyurethane material for coal mine spraying air leakage stoppage. By adding the prepared wrinkled graphene oxide coated UiO-66-NH2 / modified multi-walled carbon nanotubes, the mechanical property and strength of the prepared polyurethane material for coal mine spraying air leakage stoppage can be obviously improved, the flame retardant property such as the oxygen index of the material is also obviously improved, the foam expansion is improved to a certain extent, the preparation method is simple, and the preparation method is suitable for industrial production. The flame-retardant and mechanical properties can be obviously improved, and the application prospect is wide.

The invention discloses a polyether siloxane defoaming agent for water-based paint and a preparation method of the polyether siloxane defoaming agent, and relates to the technical field of defoaming agents. The polyether siloxane defoaming agent for the water-based paint comprises the following raw materials in parts by weight: 60-75 parts of polyether modified silicone oil, 5-8 parts of silicon paste, 3-5 parts of a dispersing agent, 2-4 parts of silicon dioxide, 5-10 parts of an emulsifying agent and 2-5 parts of a surfactant. The polyether siloxane defoaming agent for the water-based paint, prepared by the invention, has good defoaming and foam-inhibiting properties and stability.

The invention discloses a silica gel material and a preparation method thereof, a silica gel tube, an implant and a preparation method and application thereof. The silica gel material comprises the following components in parts by weight: 100 parts of R-vinyl polysiloxane; 10 to 80 parts of a reinforcing agent; 0.000002 to 1 part of a catalyst; wherein R in the R-vinyl polysiloxane is substituted or unsubstituted straight-chain alkane or branched alkane of C1-C5, and substituted or unsubstituted aromatic hydrocarbon of C6-C20, and R in the R-vinyl polysiloxane is substituted or unsubstituted straight-chain alkane or branched alkane of C1-C5, or substituted or unsubstituted aromatic hydrocarbon of C6-C20; the content of vinyl in the R-vinyl polysiloxane ranges from 0.1 mol% to 0.5 mol%; the components contained in the reinforcing agent comprise hydrophilic groups; the content of Si-H groups in the hydrogen-containing silicone oil is 0.18 mol% to 1.6 mol%; the molar ratio of the Si-H group in the hydrogen-containing silicone oil to the vinyl group in the R-vinyl polysiloxane is (0.5-10): 1; optionally, the composition also comprises an inhibitor. According to the silica gel material provided by the invention, the permeability of water to the silica gel tube is increased while the mechanical property is met, so that the release amount of a medicine is increased, and the defect of low in-vitro release degree in the prior art is improved.

The invention provides a pouring sealant and a preparation method thereof. The pouring sealant comprises a component A, a component B, a component C and a component D, wherein the component A comprises hydroxyl-terminated polydimethylsiloxane, inorganic filler, phase change microcapsules and surface-modified hexagonal boron nitride nanosheets; the component B comprises dimethyl silicone oil, a silane cross-linking agent, a silane coupling agent and an organic tin catalyst. The pouring sealant provided by the invention can effectively prevent corrosive ions and the like in salt mist from entering a diode area of the junction box while ensuring the sealing performance of the diode of the junction box, prevents the phenomenon of corroding the diode, and controls the temperature rise of the junction box in operation through effective thermal management, so that the service life of the junction box is prolonged. And the service performance and the service life of the photovoltaic module junction box in an offshore environment are improved and prolonged.

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.