2101 results about "Silicone rubber" patented technology

The invention relates to a high / low-temperature-resistant wear-resistant tear-resistant fluorosilicone rubber compound and a preparation method thereof, and belongs to the technical field of special rubber materials, the high / low-temperature-resistant wear-resistant tear-resistant fluorosilicone rubber compound comprises the following components: raw fluorosilicone rubber, a reactive liquid rubber compatibilizer, a reinforcing filler, a tear-resistant aid, a high-temperature-resistant aid, a vulcanizing agent, an accelerant, an anti-aging agent and an anti-attrition filler, the provided reaction type liquid rubber compatibilizer contains vinyl carboxyl liquid fluorosilicone rubber, the tear-resistant auxiliary agent contains zinc polymethacrylate, the high-temperature auxiliary agent contains vinyl fluorosilane modified carbon nanotubes, and the anti-friction filler contains molybdenum disulfide and layered nano zirconium phosphate which are treated by oxygen plasma. The high and low temperature resistance stability, oil resistance, wear resistance and tear strength of the fluorosilicone rubber are synergistically improved by regulating and controlling the multi-cross-linked network structure of the fluorosilicone rubber, strengthening the interface action of the rubber and the filler and optimizing the composite vulcanization system, meanwhile, structuralization of a rubber compound is prevented by optimizing the preparation process, and the requirement for adaptability to severe working conditions is met.

The invention relates to the technical field of foamed silicone rubber surface detection, and discloses a foamed silicone rubber surface detection method based on image visual identification, which comprises the following steps: acquiring a color image of a foamed silicone rubber surface, carrying out graying and normalization processing, and generating a diffuse reflection effective detection area by using a polarization filter difference technology; color abnormity is detected based on an image gridding and gray statistical method, meanwhile, pore and microbubble defects are detected in combination with minimum value seed point extraction and an eight-neighborhood region growing algorithm, finally, various masks are fused, the defect area and number are counted, and a quality inspection report is generated; the method can effectively inhibit highlight interference and accurately identify uneven colors and pore microbubbles, the detection process does not need external training, calculation is efficient, and the method is suitable for rapid detection and quality control of surface defects of foamed silicone rubber.

The invention discloses a preparation method of flame-retardant silicone rubber resistant to long-term thermal aging, and relates to the technical field of high-molecular compound composition anti-aging rubber. The flame-retardant silicone rubber is prepared from the following components in parts by mass: 75 to 100 parts of methyl vinyl silicone rubber raw rubber, 18 to 28 parts of fumed silica, 20 to 35 parts of aluminum oxide trihydrate, 0.5 to 3 parts of platinum flame-retardant synergist, 2 to 5 parts of heat-resistant additive, 1.5 to 2.5 parts of structured control agent, 1 to 2 parts of cross-linking agent, 2 to 10 parts of anti-aging agent and 8 to 13 parts of fluorinated silicone rubber. Through a synergistic flame-retardant system, the silicone rubber disclosed by the invention shows obvious advantages in flame-retardant capability, can reach a higher flame-retardant grade, effectively delays flame propagation, and reduces the risk of fire disasters. The weather resistance of the silicone rubber is remarkably improved due to the ultraviolet absorption function and the anti-oxidation function of the anti-aging agent, so that the silicone rubber can effectively resist ultraviolet rays and oxidation under the long-term outdoor solarization condition, and the performance reduction and the appearance deterioration are reduced.

The invention discloses a co-extrusion shielding medium-voltage power cable, and relates to the technical field of cables, the outer side of an inner reinforcing rope is provided with a supporting flame-retardant assembly, the outer side of the inner reinforcing rope is sleeved with a reinforcing spiral, the outer side of the reinforcing spiral is sleeved with a heat conduction pipe, a flame-retardant bag is installed between adjacent supporting rods, and one side of a heat conduction film is bonded with a flame-retardant silica adhesive tape. According to the invention, the reinforced connecting rods embedded in the reinforced through holes can extrude the supporting rods to deform, so that bending is resisted, and excessive bending deformation is prevented; heat generated in the use process of the cable can be dispersed to other positions of the cable, local overheating of the cable is prevented, influences on other inner conductors are reduced due to various reasons such as cooling, fire extinguishing and keeping away of the inner conductors, it is guaranteed that the cable can work normally for a longer time, and the other normal inner conductors are protected.

The invention discloses a multi-mode three-dimensional tactile sensing device, method and system based on light reflection and resistance, and the device comprises a hemispherical flexible layer, four silicone rubber columns, a thermistor layer, a piezoresistive film layer composed of four piezoresistive sensing units, a light reflection film layer, an optical fiber sleeve, a transmitting optical fiber, and a receiving optical fiber. The top ends of the silicone rubber columns are connected to the lower portion of the hemispherical flexible layer and evenly distributed in four quadrant areas in the hemispherical flexible layer, the thermistor layer is located below the silicone rubber columns, and all the piezoresistive sensing units of the piezoresistive film layer are arranged below the thermistor layer and correspond to the silicone rubber columns in a one-to-one mode. The light reflecting film layer is located below the piezoresistive film layer, the optical fiber sleeve is arranged below the light reflecting film layer, and terminals of the transmitting optical fiber and the receiving optical fiber are coaxially arranged in the optical fiber sleeve at intervals, so that an optical fiber bundle is formed. The system is low in cost, wide in application scene and capable of achieving three-dimensional force and multi-mode sensing.

The invention discloses a temperature-resistant and wear-resistant three-layer insulated wire and a preparation method thereof, and relates to the technical field of cables. The preparation method comprises the following steps: extruding the inner layer material on the surface of the conductor material to form the inner insulating layer, extruding the modified silicone rubber on the surface of the inner insulating layer to form the middle layer, extruding the outer layer material on the surface of the middle layer to form the outer insulating layer, and curing to obtain the high-temperature-resistant flame-retardant cable material. Wherein the inner-layer material is prepared from low-density polyethylene, an antioxidant 1010, insulating particles, a voltage stabilizer and the like; the modified silicone rubber is prepared from silicone rubber, a boron nitride compound, modified magnesium oxide and the like; the outer-layer material is prepared from the inner-layer material and a boron nitride compound. Due to the introduction of the components such as the insulating particles, the voltage stabilizer and the boron nitride compound, the high voltage resistance, the aging resistance, the wear resistance and the temperature resistance of the crosslinked polyethylene insulated power cable are effectively improved. Therefore, the method has a wide application prospect.

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 provides a self-repairing hydrated salt phase change microcapsule as well as a preparation method and application thereof, and belongs to the field of phase change materials. The preparation method comprises the following steps: preparing a hydrated salt phase change material and sorbitol into eutectic melt by adopting a melting method; strontium carbonate, sorbitol grafted nano titanium dioxide, SiO2-coated silicone rubber microspheres, hollow Al2O3 microspheres, tannic acid microcapsules, alpha-zirconium phosphate, melamine polyphosphate, diethyl aluminum hypophosphite, carboxylated multi-walled carbon nanotubes, polydopamine modified boron nitride nanosheets and hydrophilic fumed silica are added into the eutectic melt, and blending is performed to obtain a core material; The preparation method comprises the following steps: adding strontium carbonate, sorbitol grafted nano titanium dioxide, SiO2-coated silicone rubber microspheres, hollow Al2O3 microspheres, tannic acid microcapsules, alpha-zirconium phosphate, melamine polyphosphate, diethyl aluminum hypophosphite, carboxylated multi-walled carbon nanotubes, polydopamine modified boron nitride nanosheets and hydrophilic fumed silica into the eutectic melt; bio-based polyurethane-polyurea is used as a shell material, the core material is coated in the shell to prepare the microcapsule, and the temperature of the coating operation is not higher than the phase change temperature of the hydrated salt phase change material; the surface is coated with a super-hydrophobic coating. According to the invention, a solid filler system is constructed, and a low-temperature preparation process is combined, so that the phase-change microcapsule with high performance, high reliability and high safety is developed.

The invention relates to the technical field of measuring devices, in particular to a three-dimensional laser measuring device based on motor detection. Comprising a rack and a microcontroller, and further comprises a moving frame, an electric rotary table and two mold pouring boxes are installed on the moving frame, a to-be-tested motor is arranged on the electric rotary table, an electric heater and a refrigeration module are installed on each mold pouring box, a cavity is formed in each mold pouring box, a turnover frame driven by a turnover motor is installed on a multi-axis mechanical arm, and the turnover frame is provided with a motor. The overturning frame is provided with an overturning clamp for overturning a motor to be tested, the multi-axis mechanical arm is provided with a reflective liquid storage box and a release agent storage box, the reflective liquid storage box and the release agent storage box are both provided with pump bodies, the liquid outlet ends of the two pump bodies are both communicated with spray heads through corrugated connecting pipes, and the two spray heads are both installed on the overturning frame. The beneficial effects of the invention are that through triple data fusion, silicone rubber reverse mold cyclic regeneration and full-process automatic integration, high-precision measurement of the to-be-measured motor during three-dimensional scanning is realized.

The invention discloses a rubber compound for aviation sealing elements and a preparation method thereof, and relates to the technical field of rubber compounds. The rubber compound for the aviation sealing element comprises the following raw material components in parts by weight: 30-50 parts of methyl vinyl phenyl silicone rubber; 50 to 70 parts of perfluoroether rubber; 20-30 parts of a compatible reinforcing agent; 10-20 parts of modified hydrogenated nitrile rubber; 4 to 6 parts of fluorinated graphene; 2-5 parts of a vulcanizing agent; and 2-5 parts of an anti-aging agent. The compatibility enhancer, the modified hydrogenated nitrile rubber and the fluorinated graphene are used for enhancing and improving the rubber compound, so that the comprehensive performance of the prepared rubber compound is more excellent, and the requirements of aviation sealing elements are met.

The invention provides a resistance-type flexible multifunctional sensor and a preparation method and application thereof. The sensor comprises a flexible fabric, a sensing layer attached to the surface of the flexible fabric and an electrode attached to the surface of the sensing layer. The sensing layer is of an intercalation structure formed by stacking and distributing graphene (GR), carbon nanoparticles (CNPs) and silicone rubber (SR). According to the resistive flexible multifunctional sensor and the preparation method and application thereof, the sensing layer of an intercalation structure formed by stacking and distributing the graphene, the carbon nanoparticles and the silicone rubber is adopted, measurement of pressure, strain and temperature can be achieved at the same time, and therefore the high-performance flexible multifunctional sensor is obtained; and a multi-mode sensing mode is expected to be provided for precise monitoring and somatosensory application.

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 polymer sealing ring and a preparation method thereof, and relates to the technical field of polymer materials. The high-temperature-resistant fluororubber sealing gasket is prepared from the following raw materials in percentage by mass: 30 to 50 percent of fluorinated modified silicone rubber, 15 to 25 percent of fluororubber, 7.2 to 16.4 percent of hybrid white carbon black, 2.5 to 6 percent of hydroxyl silicone oil, 8 to 11 percent of plasma fluorinated modified aluminum oxide, 4 to 8 percent of carbon black, 0.8 to 1.4 percent of palm wax, 0.8 to 1.4 percent of internal release agent, 1 to 2 percent of vulcanizing agent, 3 to 5 percent of triallyl isocyanurate and 0.5 to 1 percent of anti-aging agent. The fluorinated modified silicone rubber is prepared by grafting C2-18-perfluoroalkyl iodoethane on a silicone rubber side chain, so that the low temperature resistance of the silicone rubber is effectively improved, and the phenomenon that methyl vinyl silicone rubber is easy to crystallize at low temperature is successfully inhibited; the sealing ring material has good performance at high and low temperatures, and the use temperature range of the sealing ring material is effectively improved.

A silicone rubber with UV aging resistance and low water absorption and its preparation method and application are provided. The preparation method uses a coupling agent KH570 and glyceryl monostearate to perform modified treatment on titanium dioxide to obtain modified titanium dioxide, uses a surface-modified coupling agent A171 and glyceryl monostearate to perform modified treatment on fumed silica to obtain modified fumed silica, and further performs subsequent treatment on methyl vinyl siloxane raw rubber, silicone oil, aluminum hydroxide, the modified fumed silica, the modified titanium dioxide, zinc oxide, α-alumina, a coupling agent KH560, a defoamer, iron oxide and a vulcanizing agent to obtain the silicone rubber. The silicone rubber prepared by the preparation method has low water absorption and excellent aging resistance, and its mechanical and electrical properties are also superior.

The invention discloses a material flow rate control method and system for liquid silica gel injection molding, and the method comprises the following steps: S1, collecting temperature gradient distribution in an injection mold, silica gel initial viscosity and pressure intensity data in a mold cavity in real time through a multi-mode sensor network, and inputting the data into a pre-molding parameter model; s2, based on the pre-forming parameter model; s3, outputting a result according to the dynamic response equation; and S4, dynamically calibrating the regulation and control parameter set through a fuzzy neural network in combination with a closed-loop feedback mechanism, and driving an execution mechanism to adjust the silica gel injection rate based on the calibrated parameters. The industrial bottleneck of liquid silica gel injection molding flow rate control is systematically solved; the cooperative construction of the multi-modal sensing network and the multi-field coupling model breaks through the physical limitation of a traditional empirical formula, and realizes the improvement of the dynamic response precision under a complex working condition.

The invention discloses an ultrasonic flow meter, and relates to the technical field of fluid measurement, the ultrasonic flow meter comprises an external clamping type flow meter and a fitting mechanism, the fitting mechanism is arranged on the lower surface of the external clamping type flow meter, and the fitting mechanism comprises a silicone rubber bag fixedly connected with the lower surface of the external clamping type flow meter; a storage bag is fixedly connected to the front end of the outer clamping type flowmeter, the storage bag is communicated with the silicone rubber bag through a conveying pipe, the storage bag and the silicone rubber bag are both filled with a coupling agent, a first support is fixedly connected to the front end of the outer clamping type flowmeter, and a threaded rod is inserted into the middle of the first support in a threaded mode; the end, close to the storage bag, of the screw rod is rotationally connected with a pressurizing plate, the short arm ends of the first support are inserted into the two sides of the pressurizing plate correspondingly, and therefore the problem that the measuring precision is affected due to the fact that sound wave transmission of the ultrasonic flowmeter in the running state is unstable due to the change of the density of the contact face is solved.

The invention relates to the technical field of optical-mechanical structures, in particular to a secondary mirror supporting structure and a common-aperture optical system mounting method applying the same, and the secondary mirror supporting structure comprises a secondary mirror bracket, a secondary mirror frame and a flexible hinge; on one hand, through the epoxy glue injection hole and the silicone rubber injection hole, the stability of the angle posture of the secondary mirror can be improved in a manner of jointly fixing the secondary mirror by using epoxy glue and silicone rubber; on the other hand, the flexible hinge is used for elastically supporting the secondary mirror, stress caused by difference of thermal expansion coefficients of the secondary mirror and the secondary mirror frame can be absorbed, the stability of the angle posture of the secondary mirror is further improved, and actual experiment requirements are met.

The invention relates to the technical field of materials, and discloses silicone rubber for a flame-retardant functional cable accessory and a preparation method thereof.The silicone rubber is prepared by taking methyl vinyl silicone rubber as a base material and maleic anhydride grafted SEBS, a flame-retardant material and the like as auxiliary materials through mixing, extrusion and vulcanization processes, the flame-retardant material is of a fluorene-thioether alternating block structure, and the flame-retardant functional cable accessory has the advantages that the flame-retardant functional cable accessory is obtained; the structure of the flame retardant contains a large number of phosphorus flame retardant elements, fluorene heterocyclic rings can serve as a carbon source, sulfur and phosphorus elements can serve as acid sources, and secondary amine connected with the structure can serve as a gas source, so that the flame retardant has the characteristics of a three-source-integrated intumescent flame retardant, and can interact with a maleic anhydride grafted SEBS structure in the subsequent high-temperature vulcanization process; therefore, the purpose of effectively improving the flame retardant property of the silicone rubber by adding a small amount of the flame retardant is achieved, and the flame retardant long-term effect of the silicone rubber can be guaranteed. In addition, the fluorene heterocyclic ring is high in rigidity, and the mechanical strength of the silicone rubber can be improved to a certain extent.

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.

The invention relates to the technical field of wastewater multi-stage treatment, and discloses silicone rubber product production wastewater multi-stage treatment equipment based on environment-friendly popularization, which comprises a box body, an aerator and a filter plate arranged in the box body, a shaft sleeve connected in the box body in a sliding manner, and a barrier piece, a plugging piece and a storage pipe which are fixedly connected with a mounting plate, the filter plate is located above the aerator, and meanwhile, the blocking piece is pushed through accumulated particles, so that the blocking piece is temporarily communicated with the storage pipe, and the accumulated particles are discharged into the storage pipe. Through multistage wastewater treatment, wastewater subjected to interception treatment can better meet treatment requirements, meanwhile, a filter plate is arranged above an aerator for protection, the overall water quality purification level is effectively improved, and through cooperative work of a scraping strip and a plugging piece, automatic cleaning and collection of particles are achieved, frequent manual intervention is not needed, the cleaning efficiency is improved, and the treatment cost is reduced. Manual maintenance cost and equipment downtime are reduced, and continuous and efficient operation of the device is guaranteed.

The invention provides an anti-extrusion cable and a cable connection structure, and relates to the technical field of cables.The anti-extrusion cable comprises a cable body, the cable body comprises a middle sheath, a shielding layer, a plurality of guide cores, a filling layer and an inner insulating sheath, the guide cores are evenly arranged on the inner side of the middle sheath, and the shielding layer is arranged on the inner side of the middle sheath; the guide cores, the inner insulating sheaths and the shielding layers are arranged in a one-to-one correspondence manner, the inner insulating sheaths tightly wrap the outer sides of the guide cores, the shielding layers tightly wrap the outer sides of the inner insulating sheaths, and the filling layers are filled in gaps between the shielding layers and the middle sheath; a middle sheath of a cable main body is made of chloroprene rubber materials and provides stable support for an internal structure, a spiral spring steel wire fixedly sleeved on the outer side of the middle sheath can effectively disperse external extrusion acting force and improve the overall anti-extrusion performance of the cable, and a silicone rubber layer coated on the outer side of the steel wire is tightly attached to the steel wire and extends to the outer wall of the middle sheath to be in hot melting connection, so that the service life of the cable is prolonged. And extrusion impact can be buffered in an auxiliary manner.

The invention provides a damping liquid silicone rubber material which is obtained by curing a damping liquid silicone rubber raw material composition, and also provides damping liquid silicone rubber and a preparation method thereof. The hardness and strength of the liquid silicone rubber material are improved through filling of the MQ silicon resin and the high-white carbon black, meanwhile, a large number of interface areas are formed by the nano-particles and a matrix, microcosmic slippage of the interfaces is generated under the action of dynamic stress, mechanical energy is converted into heat energy through friction and viscous effects between the interfaces and molecular chains, and damping is improved; according to the invention, by introducing methyl-terminated vinyl silicone oil, a silicone rubber chain forms a large number of suspension chain structures, energy dissipation is enhanced, hydrogen-containing chain extension is carried out at a use end, a main polymer has a longer free molecular chain segment to generate a friction effect, and the damping performance of the liquid silicone rubber material is further improved. Experimental results show that the liquid silicone rubber provided by the invention has excellent damping, mechanical and other properties under high hardness.

The application discloses a multilayer fireproof material for a battery and a manufacturing method thereof, relates to the technical field of fireproof materials, and comprises a fireproof material base and a protective layer wrapped on the outer surface of the fireproof material base; the fireproof material base comprises a first glass fiber cloth layer, a ceramicized silicone rubber layer and a second glass fiber cloth layer from top to bottom; the multilayer fireproof material disclosed by the application has the advantages of remarkable fire-retardant and fireproof effects, good weather resistance and environmental protection performance, sufficient high-temperature flame impact resistance and good mechanical properties.

The invention discloses a temperature-resistant, flame-retardant and anti-corrosion composite material for a building as well as a preparation method and application of the composite material, and belongs to the technical field of polycarbonate building materials. The composite material is prepared from the following components in parts by weight: 60 to 80 parts of polycarbonate, 8 to 10 parts of a dispersing agent, 10 to 20 parts of epoxidized silicone rubber, 1 to 5 parts of benzotriazole, 1 to 5 parts of a flame retardant, 3 to 5 parts of a compatible aid, 0.3 to 0.5 part of an antioxidant, 0.2 to 0.5 part of a light stabilizer, 0.15 to 0.3 part of an anti-dripping agent and 0.2 to 0.4 part of a catalyst. According to the composite material, polycarbonate is used as a base material, the flame retardance and the corrosion resistance of the composite material can be remarkably improved by adding the epoxidized silicone rubber and the benzotriazole, the temperature resistance of the material is not obviously reduced, and the service life of the material is prolonged.

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 relates to the technical field of rubber materials, and provides a flame-retardant rubber hose and a preparation method thereof. The flame-retardant rubber hose comprises an inner rubber layer, a reinforcing layer and an outer rubber layer, and raw materials of the inner rubber layer and the outer rubber layer respectively and independently comprise the following components in parts by weight: 10-15 parts of MQ silicone rubber, 85-90 parts of nitrile rubber, 3-7 parts of 3-carboxyl-4-hydroxy-acetoacetanilide modified graphene, 35-45 parts of filler, 1-3 parts of an anti-aging agent, 5-10 parts of a plasticizer, 2-5 parts of an activating agent, 1-2 parts of a vulcanizing agent and 0.5-1.5 parts of an accelerant. According to the technical scheme, the problem that the rubber hose in the prior art is insufficient in mechanical property and flame retardant property is solved.

The invention provides two-component low-hardness silicone rubber based on a vinyl silicone oil / silicon dioxide composite material and a preparation process of the two-component low-hardness silicone rubber. By introducing modified silicon dioxide, a photoinitiator and a platinum catalyst and combining a dual cross-linking mechanism of ultraviolet curing and thermocuring, rapid curing and uniform deep cross-linking of the silicone rubber are realized. And the modified silicon dioxide adopts a core-shell structure design, so that the compatibility of the filler and a matrix is improved, and the mechanical property and long-term stability of the material are effectively improved. The prepared silicone rubber has low hardness, high tensile strength, excellent high temperature resistance and self-repairing capability, and is suitable for the fields of electronic packaging, medical instruments, automobile parts and the like. The process is simple and convenient, the curing speed is high, the product performance is excellent, and the industrial application value is wide.

The utility model provides a local resonance type phononic crystal primitive cell which comprises a silicon rubber base body serving as an outer ring, a steel scatterer is arranged in an inner cavity of the silicon rubber base body, and the steel scatterer and the silicon rubber base body are connected and fixed through a soft material wrapping layer. The four spring mass subsystems are nested in the steel scattering body; a soft material wrapping layer is arranged on the side wall of the inner cavity of the silicone rubber base body. According to the utility model, a plurality of complete and directional band gaps in a low-frequency range can be effectively formed, and low-frequency elastic waves are effectively inhibited; the hollow and height difference design is adopted among the external silicon rubber base body, the steel scatterer and the spring mass subsystem, so that the vibration damping material has a sufficient deformation space to play a vibration damping role; the steel scatterer, the spring mass subsystem and other structures ensure that the anti-vibration pad has an enough supporting effect, band gap regulation and control of the local resonance type photonic crystal can be effectively achieved through material selection flexibility, and low-frequency vibration control of different frequency bands is achieved.

The invention discloses a cable accessory insulation failure simulation analysis method based on a multi-physics field aging test, and belongs to the technical field of electric power analysis. Establishing a silicone rubber stress relaxation constitutive equation; establishing an interface defect probability density function; establishing an insulation failure criterion equation; combining a silicone rubber stress relaxation constitutive equation, an interface defect probability density function and an insulation failure criterion equation to obtain an electricity-heat-force combined aging simulation model, and outputting an interface pressure attenuation rate, a partial discharge initial probability and an insulation residual life three-dimensional cloud picture according to interface air gap electric field data and a critical aging state threshold value. According to the method, the electric-thermal-mechanical multi-physical field coupling model is constructed, and the influence of interaction of each physical field on insulation aging is comprehensively considered, so that the technical effect of accurately presenting the full view of the insulation aging process under multi-stress coupling is realized, and the problem that the insulation aging process under multi-stress coupling is difficult to accurately describe in the prior art is solved.