1520 results about "Silicon rubber" patented technology

The invention relates to the technical field of cables, and discloses a multi-layer composite wrapped high-temperature-resistant anti-aging cable which sequentially comprises a conductor, an insulating cable core, a shielding layer, an outer insulating layer, a fireproof layer, a heat insulation layer, a buffer cushion layer, an armor layer, an anti-aging layer and an outer sheath layer from inside to outside. The fireproof layer is formed by alternately laminating synthetic mica tapes and ceramic boron silicone rubber tapes, a reliable fireproof barrier is formed, and the heat insulation layer is arranged to achieve efficient heat insulation and stable structure through cooperation of gradient pore nano aerogel, ceramic silicone rubber round rods and phase change capsules. The buffering cushion layer is combined with the composite layer, the aluminum oxide hollow ball array and the composite capsule, so that the mechanical buffering and auxiliary heat insulation functions are achieved; the armor layer is woven by stainless steel fibers, the mechanical protection capability is improved, and the anti-aging layer is of a double-layer structure composed of montmorillonite composite fluororubber and an anti-oxidation layer, so that thermal oxidation aging is delayed.

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 relates to the technical field of conductive glue, in particular to polyurethane modified silicone rubber, sprayable conductive glue and a preparation method thereof. The polyurethane modified silicone rubber is prepared from the following components in parts by weight: 50 to 150 parts of vinyl silicone oil, 20 to 50 parts of polyurethane powder and 5 to 15 parts of compatilizer, the sprayable conductive glue comprises the following components in parts by weight: 20-40 parts of conductive particles, 5-15 parts of hydrogen-containing silicone oil, 50-150 parts of polyurethane modified silicone rubber, 1-10 parts of a coupling agent, 1-5 parts of a catalyst, 1-2 parts of an inhibitor, 40-90 parts of a diluent and 1-2 parts of a defoaming agent, compared with traditional silicone rubber, the polyurethane modified silicone rubber provided by the invention is high in mechanical strength and not easy to tear, when the polyurethane modified silicone rubber provided by the invention is used for preparing sprayable conductive glue, a conductive layer formed by the conductive glue is excellent in conductivity, and meanwhile, the mechanical property is also remarkably improved.

The invention discloses an industrial high-temperature-resistant cable, and belongs to the technical field of cables. The cable comprises a cable core and a sheath layer wrapping the cable core. The sheath layer comprises the following components in parts by weight: 32-38 parts of alkenyl polyvinyl chloride, 38-42 parts of methyl vinyl silicone rubber, 15-20 parts of modified basalt fibers, 1-2 parts of a vulcanizing agent, 6-10 parts of a plasticizer, 1-2 parts of a lubricant, 1-2 parts of a stabilizer and 0.3-0.8 part of an antioxidant. Functional modification is performed on the surface of the basalt fiber, so that the basalt fiber and a polymer matrix of the cable sheath can form a multi-layer and firm chemical structure, and the comprehensive performance of the sheath material is effectively improved.

The invention discloses a corrosion-resistant protective sleeve for an aluminum alloy cable and a preparation method of the corrosion-resistant protective sleeve, and belongs to the field of cable protective sleeves. The corrosion-resistant protective sleeve for the aluminum alloy cable is prepared from the following raw materials in parts by mass: 40 to 50 parts of ethylene propylene diene monomer, 15 to 25 parts of fluorinated silicone rubber, 5 to 10 parts of modified thiolated ethylene-vinyl alcohol copolymer, 8 to 15 parts of metal fluoride nanocrystal, 4 to 8 parts of vulcanizing agent, 3 to 8 parts of plasticizer and 3 to 5 parts of flame retardant. The two rubber matrixes are compounded to form a physical barrier layer to prevent corrosion media and water molecules from permeating, material pores can be filled with the metal fluoride nanocrystals, diffusion channels of the corrosion media are reduced, and hydrophobicity and corrosion resistance are improved through cooperation of the metal fluoride nanocrystals and the fluorinated silicone rubber. The modified thiolated ethylene-vinyl alcohol copolymer can improve the compatibility between rubber matrixes and form coordination with metal ions of the metal fluoride nanocrystals, so that the diffusion path of a corrosive medium is prolonged, and the corrosion of the corrosive medium is synergistically blocked.

The invention relates to the technical field of flexible sensors, in particular to a gradient hierarchical porous structure flexible piezoresistive sensor and a preparation method thereof. The sensor is of a laminated structure and comprises an upper flexible packaging protection layer, a lower flexible packaging protection layer, a conductive fabric electrode and a middle piezoresistive sensing layer, and a limiting frame is arranged on the periphery of the sensor. The sensing layer is prepared by adopting a 3D printing ink direct writing technology, and adopted printing slurry takes silicone rubber as a matrix and is uniformly mixed with expanded conductive microspheres and conductive filler. The printing wires are stacked in order to form a macroscopic gradient porous network structure; after the expanded microspheres are subjected to in-situ foaming, micro closed pores are formed in the material, and a rough microstructure is constructed on the surface of the wire material, so that hierarchical multi-scale regulation and control of a conductive network are realized cooperatively, contact sites are increased remarkably, and the sensitivity of the sensor is further improved effectively. The flexible piezoresistive sensor prepared by the invention has the advantages of high sensitivity, wide pressure detection range and high linearity, and has the commercial values of simple preparation process, high repeatability, lower cost and the like.

The invention discloses a dynamically vulcanized polyurethane silicone rubber composite material and a preparation method thereof, and belongs to the technical field of high polymer materials, and the dynamically vulcanized polyurethane silicone rubber composite material comprises the following components in parts by mass: 40-50 parts of flame-retardant polyurethane particles, 50-70 parts of raw silicone rubber, 2-5 parts of hydrogen-containing silicone oil, 10-20 parts of a compatilizer and 0.1-0.2 part of a platinum catalyst, the flame-retardant polyurethane particles are prepared by mixing thermoplastic polyurethane particles and flame-retardant reinforced powder; the flame-retardant reinforced powder is prepared by mixing flame-retardant composite powder with chitosan and then mixing the mixture with montmorillonite; the organophosphorus flame retardant is coated in the reinforcing filler, so that migration of the organophosphorus flame retardant in the polyurethane silicone rubber composite material is reduced, the influence of the organophosphorus flame retardant on the mechanical property of the polyurethane silicone rubber composite material is reduced, and the flame retardant property is improved; and montmorillonite and silicon dioxide as carriers can be used as reinforcing fillers to improve the mechanical properties.

The invention provides a silicone rubber material for a composite insulator and a preparation method thereof.The silicone rubber material is prepared from, by mass, 100 parts of vinyl-terminated polydimethylsiloxane, 12-16 parts of hydrophobic modified white carbon black, 3-5 parts of borate modified white carbon black, 5-7 parts of hydroxyl-terminated polydimethylsiloxane, 8-12 parts of polymethylhydrosiloxane and 0.001-0.005 part of a platinum catalyst, and 0.1-1 part of a light stabilizer. Through the synergistic effect of boric acid ester modified white carbon black and hydroxyl-terminated polydimethylsiloxane introduced into a silicone rubber system, an organic-inorganic composite interface structure with a reversible bonding characteristic can be constructed in the material, so that a polydimethylsiloxane chain segment can realize slow-release migration and dynamic compensation in a complex service environment; therefore, the hydrophobicity retentivity and the surface self-recovery capability of the composite insulator silicone rubber are remarkably improved.

The invention discloses a high-performance conductive adhesive doped with conductive nanoparticles, and belongs to the technical field of conductive adhesives. The high-performance conductive adhesive provided by the invention is prepared from the following raw materials in parts by weight: 50 to 100 parts of vinyl liquid silicone rubber, 100 to 400 parts of modified silver coated copper powder, 1 to 10 parts of nano silver powder I, 1 to 10 parts of epoxy silane modified prepolymer, 3 to 30 parts of hydrogen-containing silicone oil, 0.1 to 5 parts of platinum catalyst and 0.05 to 1 part of inhibitor. The silver-coated copper powder and the epoxy silane are modified, so that the conductivity and the binding power of the conductive adhesive are greatly improved, and the epoxy silane modified prepolymer can form strong covalent bond combination with the surface of an adhered object through a high-density epoxy group of the epoxy silane modified prepolymer; the nano-silver bulges on the surface of the modified silver coated copper powder increase the effective contact area and the number of contact points among the conductive filler particles, so that the conductive adhesive has the characteristics of high conductivity, low resistance, high adhesive strength and strong toughness.

The invention discloses a high-temperature-resistant high-stripping organic silicon pressure-sensitive adhesive and a preparation method thereof, and relates to a pressure-sensitive adhesive and a preparation method thereof. The invention aims to solve the problems of insufficient temperature resistance, low peel strength and poor binding force with a base material of the existing organic silicon pressure-sensitive adhesive. According to the invention, phenyl siloxane rubber, hydroxyl-terminated polysiloxane and methyl vinyl MQ silicon resin are used as basic raw materials, and polysilazane is used as a heat-resistant modifier to carry out heat-resistant modification on the chemical structure of the pressure-sensitive adhesive; a trifunctional allyl silane monomer is added in the film preparation process, so that the crosslinking density of the system is improved, and the heat resistance of the pressure-sensitive adhesive is further improved; the bonding force between the pressure-sensitive adhesive and a polyimide substrate is improved by adding the peroxysilane coupling agent, and the use of a primer in the coating process is omitted; by adding the hydroxyl MQ silicon resin and the phosphate adhesion promoter, the bonding strength of the pressure-sensitive adhesive is improved, and the high-temperature-resistant and high-stripping organic silicon pressure-sensitive adhesive is prepared. According to the invention, the high-temperature-resistant and high-stripping organic silicon pressure-sensitive adhesive can be obtained.

The invention relates to the field of high polymer materials, and discloses a preparation method of high-temperature-resistant oil-resistant special functional silica gel, which comprises the following steps: adding a thermoplastic polyester elastomer, fluorosilicone rubber and a macromolecular compatilizer into an extruder through a main feeding port, and carrying out melt blending; adding hydrogen-containing silicone oil, a platinum catalyst and an internal closed type cross-linking agent through a side feeding port, and carrying out distributed blending; under the condition that the temperature is higher than the deblocking temperature of the cross-linking agent, initiating the internal closed cross-linking agent to perform physical thermal cracking shelling and release cross-linking sites, and guiding hydrosilylation reaction to perform dynamic vulcanization; and after vacuumizing and exhausting, extruding and pelletizing to obtain the silica gel. Through cooperation of a space-time decoupling distributed feeding process and a non-toxic thermal deblocking cross-linking agent, catalyst poisoning caused by early-stage high-temperature shear consumption and by-products is avoided, a cross-phase covalent interlocking network is constructed at a polyester and fluorine-silicon two-phase interface, permeation of a non-polar solvent is hindered, and therefore the performance of the fluorine-silicon copolymer is improved. The volume swelling ratio of the material is reduced; and the high-temperature aging resistance is improved.

The invention belongs to the technical field of polymer composite materials, and particularly relates to an efficient flame-retardant low-toxic-gas-release silicone rubber composite material and a preparation method thereof. The high-efficiency flame-retardant low-toxic-gas-release silicone rubber composite material comprises the following components in parts by weight: 100 parts of methyl vinyl silicone rubber; 10 to 20 parts of ZIF-67 modified by polysiloxane; 5-10 parts of modified nano molybdenum oxide; 5 to 10 parts of melamine cyanurate; 40 to 50 parts of mesoporous SiO2 aerogel; 1-3 parts of hydroxyl silicone oil; 0.5 to 1.5 parts of a vulcanizing agent; and 0-5 parts of an auxiliary agent. The flame-retardant and smoke-suppression performance of the silicone rubber composite material is remarkably improved through material technology innovation, and meanwhile, the mechanical property and the high temperature resistance are improved.

The invention provides a tank-type circuit breaker AC / DC voltage withstand test electric field improvement method and device and a storage medium, and the device comprises an epoxy resin composite insulator embedded with an aluminum alloy spherical shell, and the spherical shell achieves the equipotential connection with the wire outlet end of a circuit breaker sleeve through conical surface cooperation. And the curvature radius is optimally designed to transfer an electric field peak value to an equatorial region. The spherical shell is coated with a semi-conductive silicone rubber layer with resistivity distributed in a gradient manner, and the outer insulator forms a multi-stage umbrella skirt structure. During installation, dimensional tolerance self-adaptive compensation is achieved through a cam locking mechanism of the floating flange, and the belleville spring set provides axial sealing pre-tightening force. The method comprises four core processes of composite structure coaxial installation, gradient electric field regulation and control, dynamic sealing locking and electric heating state verification. According to the scheme, an electrode structure is reconstructed to suppress point discharge, space charge accumulation is blocked through dielectric layer resistivity gradient distribution, the creepage distance along the surface is prolonged through the multi-stage umbrella skirts, and the technical defect that the safety distance is shortened by a traditional grading ring is overcome.

The invention relates to the technical field of fluorosilicone materials, in particular to a glass fiber sleeve with an excellent voltage resistance function and a preparation method of the glass fiber sleeve. The glass fiber sleeve with the excellent voltage-resistant function comprises a glass fiber sleeve and a composite coating coated on the outer side of the glass fiber sleeve, the composite coating is obtained by thermocuring a coating material; the coating material is prepared from the following raw materials in parts by mass: 50 to 100 parts of fluorinated silicone rubber emulsion, 1 to 5 parts of bis (3-aminopropyl) terminated polydimethylsiloxane, 0.5 to 1.5 parts of furfuryl alcohol resin, 1 to 5 parts of epoxy resin, 1 to 5 parts of activated nano silicon dioxide, 1 to 3 parts of boron nitride nanowire, 1 to 2 parts of dopamine hydrochloride, 1 to 2 parts of dispersing agent and 10 to 30 parts of solvent. The invention can effectively ensure that the coating forms a compact cross-linked structure in the curing process, and can enhance the adhesive force of the coating, weaken the temperature difference between the surface and the interior, inhibit the heat accumulation effect and delay the degradation of the insulating property.

The invention relates to the technical field of cable processing, and discloses a magnesium hydroxide-silicone rubber flame-retardant cable filling material and a preparation method thereof.The preparation method comprises the following steps that KH-570 hydrolysate is dropwise added into magnesium hydroxide dispersion liquid, and modified magnesium hydroxide is obtained through a reaction; dispersing the modified magnesium hydroxide, PCS and a first catalyst in an organic solvent, and reacting in an inert gas atmosphere for 2-4 hours to obtain PCS-coated magnesium hydroxide; modifying the PCS-coated magnesium hydroxide with a silane coupling agent to obtain modified PCS-coated magnesium hydroxide; silicone rubber, modified PCS coated magnesium hydroxide, fumed silica and hydroxyl silicone oil are mixed to form a rubber material; and adding a cross-linking agent and a second catalyst, and reacting to obtain the flame-retardant cable filling material. According to the invention, after magnesium hydroxide is coated with PCS, the silane coupling agent is adopted for modification, and when the material encounters high temperature or flame, a firm and compact ceramic protection layer can be generated, so that the effects of heat insulation, oxygen insulation and melting and dripping prevention are achieved.

The invention discloses a high-voltage motor pagoda structure direct insulation automatic detection device, which comprises a background system, a pagoda structure detection device and a display device, and is characterized in that the background system is electrically connected with the pagoda structure detection device and the display device; the appearance of the pagoda structure detection device is a pagoda structure, the upper end of the pagoda structure is a high-voltage current-limiting resistor fixedly sealed by a silicone rubber umbrella skirt structure, and the lower end of the pagoda structure is a metal shell. A motor running state input module, a relay output module, a microprocessor, a DC2500 / 5000V boosting module, a high-voltage isolation relay, a current sampling module and an analog-to-digital conversion module are arranged in the metal shell; the motor operation state input module, the relay output module, the microprocessor, the DC2500 / 5000V boost module, the current sampling module, the analog-to-digital conversion module and the high-voltage isolation relay are connected in sequence, and the device can automatically complete insulation resistance detection before the high-voltage motor is put into operation, does not need manual terminal disassembly and assembly, shortens the detection time, and improves the detection accuracy.

The invention relates to the technical field of external insulating materials for power equipment, in particular to silicone rubber, a preparation method thereof and application of the silicone rubber in a composite insulator. The silicone rubber is prepared from the following raw materials in parts by weight: 100 parts of methyl vinyl silicone rubber raw rubber, 5-20 parts of hydrophobic silicon dioxide aerogel powder, 3-15 parts of conductive and heat-conducting filler, 10-30 parts of modified aluminum hydroxide, 15-35 parts of fumed silica, 1-3 parts of a silane coupling agent and 2-5 parts of a structuring control agent, 1-4 parts by weight of a low surface energy auxiliary agent, and 0.5-2 parts by weight of a vulcanizing agent. The silicone rubber provided by the invention integrates long-acting hydrophobic anti-icing, active low-power-consumption ice melting and excellent arc ablation resistance, has long-term stability, and is especially suitable for high-voltage insulators in severe environments such as heavy ice areas and heavy dirty areas.

The invention discloses a novel insulating silicone rubber packaging material with a self-fusion characteristic, high voltage resistance and weather resistance. The material is prepared from raw methyl vinyl silicone rubber, fumed silica as a reinforcing filler, modified vinyl MQ silicone resin as a tackifier, hydroxyl silicone oil as a structure control agent, modified aluminum hydroxide and the like as raw materials, has a self-fusion characteristic, can be autonomously bonded to form a seamless insulating layer through contact pressing of two lap joint surfaces, and has the initial peel strength of 3.5 N / mm and the tensile strength of 95N / mm. The secondary fusion strength retention rate exceeds 90%; the power frequency withstand voltage under the thickness of 2mm is greater than or equal to 45kV, the power frequency withstand voltage under the thickness of 4mm reaches 66kV, and the volume resistivity is gt; and 1 * 10 < 12 > omega.m, which is improved by more than 50% compared with the traditional material. The product gives consideration to both mechanical performance and weather resistance, the thick wing-shaped sheet structure is adaptive to special-shaped equipment and can be installed in an electrified mode, and an innovative insulation protection scheme can be provided for power transmission and transformation equipment.

The invention discloses a visual tactile sensor, an electronic skin and a robot, relates to the field of sensors, and is used for improving the comprehensiveness and sensitivity of stress detection. The sensor comprises a magnetic film covering the top surface and the side surface, and the magnetic film is prepared by mixing magnetic powder and silicone rubber; the support supports the magnetic thin film, a magnetic display card and a light source are arranged in the support, the visual touch collector collects magnetic induction data and development data of stress of the magnetic thin film, and then the multi-mode pressure detection model analyzes the stress position and / or the stress size. The stress detection sensitivity is high, comprehensive detection of the top face and the side faces can be achieved, and the detection precision is high.

The invention relates to the technical field of cable manufacturing, and discloses a low-carbon environment-friendly low-voltage fireproof cable which sequentially comprises a cable core, a metal heat transfer layer, a ceramic halogen-free low-smoke heat insulation layer, a metal fire blocking layer and a halogen-free low-smoke outer sheath layer from inside to outside. The cable core comprises a plurality of insulating wire cores and a ceramic halogen-free low-smoke flame-retardant material filled in external gaps of the insulating wire cores, each insulating wire core sequentially comprises a conductor, a high-temperature-resistant mica layer and an insulating layer from inside to outside, the high-temperature-resistant mica layer is tightly coated on the surface of the conductor, and the insulating layer is coated on the surface of the insulating layer. The insulating layer is made of a ceramic silicone rubber material, and the ceramic halogen-free low-smoke flame-retardant material and the ceramic halogen-free low-smoke thermal insulation layer both contain inorganic filler capable of forming a ceramic hard shell at high temperature. According to the cable, by adopting a combined structure of the high-temperature-resistant mica layer and the ceramic silicone rubber insulating layer, the fireproof grade of the cable is improved.

The invention discloses a composite solder strip structure for BC battery interconnection and a preparation method thereof, and solves the problems of frequent short circuit, high cost, poor flexibility and low insulation reliability of existing BC battery interconnection. The composite welding strip comprises a composite metal core, a double-layer insulating layer and a segmented contact section. The metal core plated with the nickel-silver alloy is exposed by removing the insulating layer of the contact section, and the insulating layer is reserved in other areas; reel-to-reel rolling is combined with laser positioning in preparation, and insulating glue and a high-precision dispensing device are omitted. A polyolefin film and silicone rubber can be selected as an insulating film layer, the welding strip flexibility and the production adaptability are considered, the efficiency and the packaging yield are improved, through sectional type contact, double-layer insulating coating and laser positioning, different polarity contact short circuit is eradicated, interconnection production is stabilized, insulating glue and a high-precision point coating device are omitted, the assembly cost is greatly reduced, and the production efficiency is improved. And a stable barrier is constructed by the double-layer insulating film, so that the volume resistivity of the module is improved, the long-term service performance can be guaranteed, and the large-scale application of BC batteries is promoted.

The invention relates to the field of high polymer materials, and discloses a high-transparency and high-tear-resistance gas-phase silicone rubber composite material which is prepared by reacting raw materials containing the following components, the base rubber is an octamethylcyclotetrasiloxane (D4) monomer with the purity of more than or equal to 99.5%, and the content of hydrogen-containing siloxane impurities is less than or equal to 50ppm after vacuum distillation treatment; the nano filler is a core-shell type TiO2 coated SiO2 filler, the particle size of inner core TiO2 is 20 nm, the thickness of an outer shell SiO2 layer is 5-8 nm, the surface of the SiO2 layer is grafted with a silane coupling agent KH-570, and the grafting rate is larger than or equal to 85%; the flexibilizer is a hyperbranched organic silicon flexibilizer with the branching degree being greater than or equal to 80%; the initiator is a peroxide initiator DCP; the block ratio of the styrene-vinyl siloxane block copolymer is 3: 1, the shore hardness of the composite material is 70 degrees, the light transmittance is larger than or equal to 92%, and the tearing strength is larger than or equal to 35 kN / m. Compared with the prior art, the high-performance gas-phase silicone rubber provided by the invention has the advantages of high light transmittance and high tear strength, and has great technical value and economic significance.

The invention discloses a cold-resistant high-temperature-resistant hydraulic hose rubber material which comprises the following components in parts by mass: 65-75 parts of nitrile rubber, 5-15 parts of butadiene rubber, 5-10 parts of silicone rubber, 5-10 parts of ethylene propylene rubber, 5-10 parts of hydrogenated nitrile rubber, 10-15 parts of white carbon black VN3, 110-130 parts of carbon black N762, 5-8 parts of a plasticizer DOS, 5-8 parts of a plasticizer TP-90B, 3-5 parts of zinc oxide, 0.5-1.0 part of stearic acid, 1-2 parts of an anti-aging agent KY-405 and 1-2 parts of an anti-aging agent RD. The invention relates to an environment-friendly adhesive which is prepared from the following components in parts by weight: 0.5 to 1.0 part of microcrystalline wax Antilux 654, 3 to 5 parts of homogeneous resin 40MSF, 1.5 to 2.5 parts of sulfur, 1.0 to 1.5 parts of accelerant CZ, 1.5 to 2.5 parts of peroxide F40P-SP2, 0.5 to 1.0 part of assistant cross-linking agent SK8911D70 and 5 to 7 parts of Ricobond 1731HS. The material has excellent low-temperature bending property (less than or equal to-60 DEG C), hot oil resistance, thermal aging resistance and copper-plated steel wire bonding property, and is suitable for hydraulic hose manufacturing in an extreme environment.

The invention relates to a low-thermal-resistance phase change heat conduction material and a preparation method thereof, and belongs to the technical field of thermal interface materials. The phase-change-resistant heat conduction material comprises the following components in percentage by weight: 22 to 30 percent of porous BN-paraffin phase change agent, 8.5 to 10.2 percent of nano aluminum nitride, 3.5 to 4.1 percent of reactive diluent and the balance of room-temperature cured silicone rubber, according to the porous BN-paraffin phase change agent, porous BN serves as a carrier, phase change paraffin is packaged in pores, and compared with the prior art, the porous BN-paraffin phase change agent has the advantages that the pore wall of the packaged BN serves as a thermal bridge, the contact probability between the phase change agents is increased, rapid diffusion of heat in a composite material is promoted, phase change latent heat of the paraffin is fully released and conducted, and the phase change performance of the phase change agent is improved. Not only is the problem of paraffin leakage solved, but also the thermal resistance is obviously reduced.

The invention provides a composite material oil tank and a manufacturing method thereof, relates to the technical field of composite material oil tanks, and greatly simplifies the mold manufacturing and assembling process through the integrated design of a modular numerical control mold and a three-dimensional digital model. The die purchasing and processing cost is greatly reduced through partition die assembly and reuse of the supporting prosthesis, repeated investment of a special core die is avoided through accurate matching of the silicone rubber soft die and the air bag, and the laying quality of corners and narrow parts is improved. Through cooperation of two times of curing and a stepped lap joint structure, defects of fiber wrinkles, cavities, bridging and the like are effectively eliminated, and fiber continuity and resin bonding strength of a complex curved surface area are ensured. The finally formed composite material oil tank shell not only has excellent mechanical properties of high strength, high rigidity and light weight, but also has excellent sealing performance and durability, and an efficient and reliable solution is provided for large-scale application of a composite material oil tank with a complex structure.

The invention relates to the field of rubber composite materials, and particularly discloses a cold-resistant rubber composition and a preparation method thereof. The invention discloses a cold-resistant rubber composition. Comprising the following raw materials in parts by weight: 35-50 parts of natural rubber NR, 14-22 parts of epoxidized natural rubber ENR, 30-50 parts of butadiene rubber BR, 7-12 parts of a plasticizer, 2-6 parts of PVC modified silicone rubber, 4-7 parts of zinc oxide, 2-4 parts of stearic acid, 2-6 parts of nano clay, 1-2 parts of a silane coupling agent, 10-20 parts of white carbon black, 3.2-5.2 parts of an anti-aging agent, 0.5-2 parts of a homogenizing agent, 45-55 parts of carbon black, 1-3 parts of a vulcanizing agent and 0.5-1.2 parts of a vulcanization accelerator. And 0.1 to 0.4 part of scorch retarder. The cold-resistant rubber composition disclosed by the invention has relatively high tensile strength, heat aging resistance and wear resistance, is high in toughness, small in brittleness and not easy to harden and crack at low temperature, and shows excellent low-temperature impact resistance.

The invention provides a high-elasticity tear-resistant silicone rubber material and a preparation method thereof.The high-elasticity tear-resistant silicone rubber material is characterized by being prepared from, by mass, 100 parts of vinyl polysiloxane, 5-15 parts of phenylboronic acid end group modified polydimethylsiloxane and 1-5 parts of 2, 3-dihydroxypropyl disulfide, the adhesive comprises the following components in parts by mass: 10-30 parts of fumed silica, 1-5 parts of a cross-linking agent, 1-2 parts of a plasticizer and 0.001-0.005 part of a catalyst. By introducing the combination of phenylboronic acid end group modified polydimethylsiloxane and 2, 3-dihydroxypropyl disulfide, a dual dynamic covalent bond network with a stress triggering characteristic is constructed in a silicone rubber system, and when the material is subjected to external force, a disulfide bond is used as a sacrificial unit to preferentially break to dissipate energy and generate micro-voids, so that the stress triggering performance of the material is improved. And then stress-triggered boric acid ester bond dynamic recombination further disperses stress and stabilizes a micro-cavity structure, so that graded dissipation of energy is realized, crack propagation is reduced, and the elasticity and tear resistance of the material are improved.

The invention discloses a flexible self-powered triboelectric sensor, and belongs to the technical field of sensors, the flexible self-powered triboelectric sensor comprises a first silicone rubber layer, a hydrogel layer, a conductive silica gel electrode layer and a second silicone rubber layer which are sequentially arranged from top to bottom, the hydrogel layer is prepared from N-isopropylacrylamide (NIPAM), N, N-dimethylacrylamide (DMAA), N, N-dimethylacrylamide (DMAA), N, N-dimethylacrylamide (DMAA) and N, N-dimethylacrylamide (DMAA); n, N '-methylene bisacrylamide (MBA) and sodium alginate (SA) are copolymerized to form a three-dimensional network, in-situ embedding of biological source orange juice carbon dots is initiated through ultraviolet light, and the first silicone rubber layer, the hydrogel layer, the conductive silica gel electrode layer and the second silicone rubber layer are bonded and fixed on the periphery through silica gel. The invention discloses a green, safe and high-performance flexible triboelectric sensor, which realizes excellent electrical output through a simple process and is combined with an advanced signal processing technology to realize accurate recognition of multiple key physiological signals by a single sensor.

The invention relates to the technical field of composite materials, in particular to a silicone rubber composition and a preparation method thereof. The silicone rubber composition is prepared from the following raw materials in parts by weight: 100 parts of methyl vinyl silicone rubber, 25-35 parts of white carbon black, 2.8-3.0 parts of hydroxyl silicone oil, 1.1-1.2 parts of hydrogen-containing silicone oil, 0.8-1 part of a cross-linking agent, 20-30 parts of an additive A, 6-8 parts of an additive B and 1.5 parts of a silane coupling agent KH-550. The additive in the additive A is carbonized and forms an intumescent flame-retardant system in the reaction under the combined action of mannitol and bamboo fiber, and generates a flame-retardant gas during decomposition, so that the fire resistance and flame retardance of the silicone rubber composition can be effectively improved, and meanwhile, the additive B is capable of effectively improving the flame retardance of the silicone rubber composition based on the loading of blumea oil and chitosan quaternary ammonium salt. The blumea oil endows the material with an anti-aging function through the good anti-oxidation characteristic, so that the thermal stability and durability of the silicone rubber composition are effectively improved under the combined action of the additives.

The invention discloses an algicidal and bacteriostatic room temperature vulcanized silicone rubber insulating material and a preparation method thereof, and belongs to the technical field of electrical insulating materials. The material is composed of quaternary ammonium salt group-containing hydroxyl-terminated polysiloxane (QASPS) as a base adhesive, a solvent, a reinforcing filler, a cross-linking agent and a catalyst, wherein the QASPS is used for grafting a quaternary ammonium salt group derived from quaternization reaction of N, N-dimethyl octylamine and chloropropyl to a polysiloxane main chain through a covalent bond. Through molecular structure innovation, the antibacterial components are stably immobilized in a cross-linked network, and the problem that the insulativity is affected due to the fact that an antibacterial agent added in a traditional physical mode is easy to dissolve out is fundamentally solved. The prepared silicone rubber material has long-acting antibacterial property, excellent electrical insulation property and good mechanical strength, is particularly suitable for solving the problem of microbial aging on the outer insulation surface of power equipment in high-humidity areas such as tropical areas and subtropical areas, and ensures safe and stable operation of a power grid.