2239 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 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 discloses a high-pressure sleeve sheath aging evaluation method and system based on feature unevenness, and belongs to the technical field of high-pressure sleeve operation and maintaining.The method comprises the steps that a to-be-tested high-pressure sleeve sheath is sampled, the interior of a sheath body is selected as a reference area, and meanwhile multiple aging feature areas on the surface of the sheath are selected as aging areas; repairing the sampled insulated damaged area, injecting a nano silicon dioxide modified silicone rubber filler, and performing ultraviolet curing; performing group degradation characteristic test and thermal stability characteristic test on the sampled sample to obtain aging characteristic parameters including characteristic peak absorptivity of each group and thermogravimetric residual rate parameters of different temperature points; taking the aging characteristic parameter of the reference area as a reference value, respectively calculating a single parameter deviation degree of each aging area, and calculating a comprehensive aging non-uniformity value; and according to a comparison result of the comprehensive aging non-uniformity value and a preset grading threshold value, outputting an aging grade of the high-voltage sleeve sheath and a corresponding operation and maintenance strategy.

The invention discloses a high-sensitivity tactile sensing system based on a magnetic cilia array, a sensor comprises the magnetic cilia array and a sensor array, and the magnetic cilia array is attached to the upper surface of the sensor array; the magnetic cilia array comprises a substrate and cilia structures which are orderly arranged and fixed on the substrate; the cilia structure is made of ecological silicone rubber mixed with magnetic powder, and a plurality of groups of sensors are adopted to form a sensor array to construct a sensing system. By optimizing the magnetization process, uniform distribution of the magnetic particles in each cilium is ensured, and the output stability and sensitivity of the sensor are improved; meanwhile, the multi-sensor array layout is adopted, and high-precision sensing of multi-dimensional tactile information such as pressure, direction and vibration is achieved.

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 relates to the technical field of silicone rubber, and discloses flame-retardant and heat-insulating silicone rubber and a preparation method thereof.The flame-retardant and heat-insulating silicone rubber is obtained by reacting a flame-retardant aid with hollow glass beads and then adding the reaction product, methyl vinyl silicone rubber, hydroxyl silicone oil, a reinforcing agent, a flame retardant and a vulcanizing agent into an open mill to be mixed and vulcanized. The flame-retardant auxiliary agent contains a siloxane structural unit and is grafted on the surfaces of the hollow glass beads, so that the compatibility between the flame-retardant auxiliary agent and the methyl vinyl silicone rubber is improved, the hollow glass beads are more uniformly dispersed in a silicone rubber matrix, a uniform heat insulation network is formed, the heat conductivity is reduced, and the heat insulation performance is improved. The flame-retardant auxiliary agent contains nitrogen-rich triazine groups, and generates nitrogen and other non-combustible gases during combustion, so that the oxygen concentration of the combustion atmosphere can be diluted, and the limit oxygen index, flame retardance and high-temperature resistance of the silicone rubber are improved.

The invention discloses a high-viscosity silicone rubber composite material and a preparation method thereof.The preparation method comprises the steps that a silicon-based polymerization solution and a silane raw material are mixed on the basis of a rotary dropper, and a silicon-based liquid compound containing a spiral laminated layer is obtained; the preparation method comprises the following steps: dispersing a nano-filler into a silicon-based liquid compound for synthesis treatment, carrying out crosslinking treatment on the obtained primary compound and peroxide to obtain a crosslinked compound, mixing the crosslinked compound with a fiber compound, and carrying out plasma treatment to obtain a fiber-reinforced compound; performing secondary cross-linking treatment on the fiber reinforced compound and a peroxide silicone oil solution in a vacuum high-temperature environment to obtain a secondary cross-linked compound; and immersing the secondary cross-linked compound into a turbid liquid containing nano aluminum oxide, and carrying out heating treatment to obtain a finished product of the high-viscosity silicone rubber composite material. According to the invention, the problem of compatibility between the filler and the matrix material is solved, the processability is improved, and the performance of the material in multiple aspects such as high temperature resistance and aging resistance is further improved.

The invention belongs to the technical field of flexible sensing, and particularly relates to a preparation method of an implantable flexible sensor and a bladder urine content wireless monitoring system based on the sensor and a radio frequency mechanism. Wherein the performance of the sensor is improved by utilizing a microporous structure, n-octane is added into TPU to form a porous dielectric layer through a method of different temperatures and different liquid solubility, and the second dielectric layer is added into TPU by using a core-shell structure of silver nanowires and titanium dioxide, so that the anti-interference performance of the pressure-volume sensor is remarkably improved. In addition, the overall structure of the sensor is designed into a semi-bent snake-shaped structure, and the sensor has good pressure-volume performance, sensitivity, restorability and anti-interference performance. The elastic silicone rubber is used for packaging, so that the biocompatibility and practicability of the material are improved, and unstable factors such as body fluid invasion are eliminated. Meanwhile, a wireless sensing system based on a radio frequency mechanism is designed and manufactured, the urine content of the bladder can be wirelessly known from the outside, and related work such as medical care can be helped.

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 relates to the field of organic silicon thermal management materials, in particular to a flexible insulating organic silicon thermal management composite material based on a phase change material and a preparation method thereof. The problem that the internal temperature of a battery formed by a common technology cannot be effectively controlled and distributed is solved. Comprising 20%-50% of silicone oil, 0.01%-0.1% of an organosilicon catalyst, 0-25% of a heat conduction filler, 25%-80% of a phase change material, 0%-5% of a flame retardant and 0.01%-0.05% of an inhibitor. The material has excellent mechanical property and heat-conducting property, can be suitable for complex working conditions, and has efficient heat management capability. The product is simple in formula and high in designability, and a polymer network constructed by organic silicon rubber can effectively prevent an internal phase change material from leaking under the action of temperature.

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 utility model relates to a windproof and anti-icing convenient insulating device capable of live working, which comprises a lower-end metal accessory, an insulating body is arranged on the upper part of the lower-end metal accessory, and an upper-end fitting is arranged on the upper part of the insulating body; the upper part of the upper-end fitting is connected with a gland through a rotating shaft; the buckling part of the upper end fitting and the gland is provided with an arc-shaped groove for installing a high-voltage wire, and the arc-shaped groove is a silicone rubber cushion layer. An operation screw rod penetrating through the gland is mounted at the end, far away from the silicone rubber cushion layer, of the upper-end fitting; and a compression spring is sleeved on the operation screw rod between the upper end fitting and the gland. According to the insulator, the diameter of the upper umbrella cover is increased, so that the influence of dust, foreign matters or icing in severe weather on the insulator is avoided; lines can be maintained by live-line operation, and safe operation and maintenance of the lines are facilitated; the wire fixing structure can effectively avoid the problems of wire loosening and wire insulating layer abrasion caused by strong wind.

The invention discloses a distributed cooperative control method and system for silicone rubber glass fiber sleeve production equipment, and relates to the technical field of industrial automation control. Through the block chain technology, the non-tampering and credibility of the data are ensured, the problems that in a traditional method, the data are prone to being tampered, and a trust mechanism is missing are solved, efficient cooperation and task distribution between devices are achieved in combination with a multi-agent system, device operation parameters are optimized, the production efficiency and product quality are improved, and the method is suitable for large-scale popularization and application. A virtual model is constructed by using a digital twin technology, simulation verification is performed on optimized parameters, the achievement of a production target is further ensured, and the system dynamically adjusts equipment operation parameters and enhances the flexibility and dynamic response capability of the system through a global optimization algorithm and a feedback control mechanism.

The invention discloses a dynamic silicone rubber microsphere and a preparation method thereof, and the preparation method comprises the following steps: injecting a polysiloxane solution containing dynamic bonds onto a super-amphiphobic coating to form a liquid column, spontaneously breaking under the driving of interfacial tension to form polymer liquid drops, heating to evaporate a solvent to form polymer microspheres, and drying to obtain the dynamic silicone rubber microsphere. And initiating crosslinking through ultraviolet irradiation to form the dynamic silicone rubber microspheres. A polar dynamic bond is introduced into the PDMS elastomer, so that the surface energy of the elastomer can be improved, the dynamic silicone rubber microspheres are prepared on the super-amphiphobic surface, the controllability of the form, size and distribution of a silicone rubber powder material is further realized, and a core material is provided for 3D printing of an elastomer polymer powder bed.

The invention relates to the technical field of polymer insulating materials, in particular to a flexible low-smoke halogen-free polypropylene insulating material and a preparation method thereof. The invention discloses an ultra-soft low-smoke halogen-free polypropylene insulating material, which comprises the following components in parts by weight: 50-80 parts of block co-polypropylene; 10 to 40 parts of organic silicon rubber; 0.06 to 0.24 part of a bis-2, 5 vulcanizing agent; the material further comprises an antioxidant, a compatilizer, a flame retardant, a flame retardant synergist, a lubricant and the like. The insulation material provided by the invention is good in flexibility and convenient to install and lay under the condition of ensuring that the polypropylene cable material meets flame-retardant energy absorption and electrical insulation properties. The preparation method of the insulating material adopts a dynamic vulcanization technology, and the organic silicon rubber is distributed in the polypropylene material in a'sea-island 'or'sea-sea' structure, so that the hardness of the matrix resin is reduced on the premise of ensuring the mechanical property of the material. Meanwhile, a surface modification mode of the flame retardant is optimized, so that the hardness of the material is further reduced. And the odor emission of the material in the production and use processes can be effectively reduced, so that the material is more environment-friendly.

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 an instrument capable of being separated through light control and a preparation method and application of the instrument, and belongs to the technical field of biomedical engineering and flexible electronics. The instrument capable of being separated through light control comprises a flexible substrate layer, an electrode layer and a gel integration layer, the preparation method comprises the following steps: (1) forming an electrode pattern on a silicon wafer through photoetching, and carrying out oxygen plasma treatment to prepare a hydrophilic surface; (2) spin-coating a water-soluble polymer solution to form a sacrificial layer; (3) spin-coating silicone rubber pre-polymerized liquid and curing to form a flexible substrate layer; (4) dissolving the sacrificial layer with water to realize demolding, and embedding a patterned conductive material into the surface to form an electrode layer; and (5) coating the photo-responsive adhesive hydrogel pre-polymerization liquid, and performing cross-linking curing to form a gel integration layer, thereby obtaining the photo-responsive adhesive hydrogel. Through integrated structural design and functional material integration, the brain-computer interface ECoG electrode with high flexibility, high adhesion, high conductivity and controllable debonding capacity and the like is provided, and a technical basis and an application platform are provided for a next-generation intelligent implantable brain-computer system.

The invention relates to an insulating material, in particular to a voltage-breakdown-resistant high-insulation EPDM material and application thereof, and the voltage-breakdown-resistant high-insulation EPDM material comprises the following components: modified silicone rubber, 4, 4 '-thiobis (6-tert-butyl o-cresol), a composite filler, a cross-linking agent, 4-isopropoxybenzoic acid and an EPDM matrix; according to the voltage-breakdown-resistant high-insulation EPDM material disclosed by the invention, the comprehensive performance of the material is greatly improved and the application field of the EPDM material is widened through the matching of all the components and the specific dosage ratio of the components. The modified silicone rubber is introduced, the modified silicone rubber is obtained by modifying vinyl-containing perfluoropolyether-b-polysiloxane, in the vinyl-containing perfluoropolyether-b-polysiloxane, a perfluoropolyether chain segment has extremely low surface energy and good chemical stability, and a polysiloxane chain segment endows the vinyl-containing perfluoropolyether-b-polysiloxane with excellent flexibility and electrical insulating property.

The invention discloses a battery module aerogel buffer heat insulation pad, and belongs to the technical field of new energy automobile battery heat management. According to the technical scheme, the battery module aerogel buffer heat insulation pad comprises an aerogel felt layer located in the middle, and double buffer frame structures and composite protective films are sequentially arranged on the two sides of the aerogel felt layer from inside to outside; the aerogel felt layer is composed of a nano SiO2 aerogel and graphene composite skeleton, the thickness is 1.5 mm + / -0.1 mm, the heat conductivity is less than or equal to 0.015 W / (m.K), and the addition amount of graphene is 1.5% + / -0.3% of the mass of the SiO2 aerogel; the double-buffer frame structure comprises an inner MPP honeycomb frame and an outer silicone rubber montmorillonite frame; through the composite design of the aerogel felt layer and the double-buffer frame structure, the temperature difference of cold and hot surfaces of more than or equal to 170 DEG C and the compression ratio of 25%-40% under 2MPa are realized under the thickness of 1.5 mm, meanwhile, the gradient buffer structure adapts to the expansion stress of the battery, and the composite material has the characteristics of realizing high-strength support, multi-stage buffer and flame-retardant phase change cooperative control in a thin structure.

The invention discloses a bacteriostatic silicone rubber material and a preparation method thereof. The material is prepared by taking methyl vinyl silicone rubber as a matrix and adding components including polysiloxane containing quaternary ammonium salt groups, nano zinc oxide / cerium oxide composite particles, polyethylene glycol monomethyl ether methacrylate and the like through an artificial intelligence optimization process. The preparation method comprises the following steps: preparing polysiloxane containing quaternary ammonium salt and trifluoropropyl through AI optimization; preparing nano zinc oxide / cerium oxide composite particles through AI control; mixing to prepare the antibacterial silicone rubber composition; carrying out AI optimization step-by-step curing molding; aI optimization ultraviolet grafting and plasma treatment are carried out for surface functionalization. The obtained material has excellent antibacterial durability, surface hydrophilicity, mechanical performance, anti-aging performance and biological safety, is high in batch consistency, and is suitable for long-term implanted medical instruments such as medical catheters and artificial blood vessels.

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 discloses a heat-insulating silicone rubber foam material with high elasticity and a preparation method thereof, and relates to the technical field of heat-insulating materials. The invention discloses a heat-insulating silicone rubber foam material with high elasticity. The high-temperature-resistant silicone oil composition is prepared from the following raw materials in parts by weight: 40 to 60 parts of vinyl-terminated phenyl silicone oil, 10 to 30 parts of nano silicon dioxide, 40 to 80 parts of modified fly ash hollow microspheres, 2 to 10 parts of cerium dioxide, 1 to 5 parts of sodium bicarbonate, 3 to 8 parts of self-synthesized single-hydroxyl-terminated single-hydrogen-terminated silicone oil, 5 to 15 parts of self-synthesized perhydrosilicone oil, 4 to 10 parts of diphenyl silanediol and 0.1 to 0.3 part of 1-ethynyl cyclohexanol. 0.3 to 0.5 part of a platinum complex catalyst, 0.5 to 1 part of an antioxidant 1010 and 0.5 to 2 parts of a coupling agent KH-560. The silicone rubber foam material prepared by the invention adopts a two-stage foaming and gradient curing process, combines the modified fly ash hollow microspheres and other fillers, has the advantages of high elasticity, good heat insulation property, aging resistance and the like, is environment-friendly in raw materials and stable in process, and is suitable for buffering and heat insulation between battery cells in the fields of new energy automobiles and energy storage.

The invention discloses a silica gel material with high tensile strength and a preparation method thereof, and the preparation method comprises the following steps: mixing fumed silica and a silane coupling agent, carrying out surface modification treatment to obtain a modified filler, and premixing methyl vinyl silicone rubber and hydroxyl silicone oil in mixing equipment to obtain a matrix mixture; the modified filler and the nano aluminum oxide are added into the matrix mixture in batches and are dispersed and blended through mixing equipment, so that uniform dispersion of the nano filler is realized, stress concentration is effectively reduced, and the tear resistance is improved; then the silica gel rubber compound is transferred into open type mixing equipment, a peroxide vulcanizing agent is added, thin-passing dispersion is carried out, a to-be-vulcanized rubber material is sequentially subjected to first-stage mold pressing vulcanization and second-stage post-vulcanization treatment, the high-tensile-strength silica gel material with a cross-linked network structure is formed, the cross-linking density is guaranteed, meanwhile, internal defects are eliminated, and the high-tensile-strength silica gel material with the cross-linked network structure is obtained. The tensile strength of the material is obviously improved; the uniformity and the aging resistance of the material are improved, and the silica gel material with high strength and high elasticity is obtained.

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.

A nonlinear crystal flexible clamping and temperature control device comprises a clamping seat, a top face clamping block, a side face clamping block, a stud, a compression spring, a nut, a window mirror pressing ring, a wave spring, a window mirror gasket, a window mirror, a window mirror limiting block, a nonlinear crystal, silicon rubber, a thermistor and a ceramic heating piece. The flexible clamping device exerts pre-tightening force on the nonlinear crystal in the horizontal direction and the vertical direction through the compression spring, and meanwhile flexible clamping of the nonlinear crystal is achieved in a silicone rubber dispensing fixing mode. The temperature control device achieves accurate control over the temperature of the nonlinear crystal in the mode that a thermistor collects temperature signals and a ceramic heating piece heats a clamping base. The flexible clamping and temperature control device disclosed by the invention has the characteristics of performing thermal expansion compensation on the nonlinear crystal, being high in mechanical resistance and temperature control precision, uniform in crystal heat distribution and the like.

The invention provides a preparation method of a low-interface thermal resistance carbon fiber composite material based on a low magnetic field orientation technology and carbon fiber orientation equipment. The preparation method comprises the following steps: performing surface modification on short carbon fibers by adopting a non-magnetic carbon fiber surface modifier; mixing and dispersing the surface-modified short carbon fiber, liquid silicone rubber and an auxiliary agent to obtain a carbon fiber composite material; calendaring the carbon fiber composite material to a specified thickness, coating the surface of a rotating table with the carbon fiber composite material for rotary orientation, and preliminarily adjusting the distribution of carbon fibers in the carbon fiber composite material; performing orientation arrangement on the carbon fibers in the carbon fiber composite material again by combining a gradient magnetic field lower than 1T with ultrasonic vibration, wherein the vibration direction of the ultrasonic vibration is consistent with the direction of the magnetic field; and carrying out heating curing molding on the oriented carbon fiber composite material to obtain the low-interface thermal resistance carbon fiber composite material. By regulating and controlling fiber arrangement in stages and combining ultrasonic vibration auxiliary dispersion, carbon fiber dominant direction arrangement is effectively achieved, and the magnetic field intensity requirement is lowered.

The invention discloses a preparation method of a smokeless flame-retardant fire blanket, and relates to the field of fire-fighting facilities, and the smokeless flame-retardant fire blanket is formed by compounding a surface layer, a middle layer and an inner layer; the preparation method of the smokeless flame-retardant fire blanket comprises the following steps: S1, preparing the surface layer: mixing the high-temperature-resistant silicone rubber with the solvent, the curing agent, the filler and the auxiliary agent, and uniformly stirring to form a silicone rubber coating solution; the high-temperature-resistant silicone rubber coating and the glass fibers are used as base materials, the inner layer is the macromolecular fire extinguishing material coating and has excellent fire extinguishing, heat insulating and high-temperature-resistant performance, the product is coated with multiple organic high-temperature-resistant silicone rubber, so that the organic high-temperature-resistant silicone rubber is tightly attached to the surfaces of the glass fibers, and a high-strength composite protective layer is formed; and a special polymer fire extinguishing material coating is further applied, and when exposed to open fire, the functional coating can quickly generate thermal decomposition reaction, release non-combustible gas and effectively reduce local oxygen concentration, so that the flame-retardant and fire-extinguishing effects are realized.

The invention discloses a biliary tract stent capable of being accurately released, which comprises a stent far end, a stent straight section and a stent near end which are connected in sequence, the number of layers of the stent is at least one, and the stent far end and the stent near end are made of materials with different colors. The number of layers of the stent is one, the materials of the stent far end, the stent straight section and the stent near end of the stent comprise but are not limited to silicone rubber, polyurethane, polyethylene, nylon or modified nylon Pebax, and the material hardness of the stent far end, the stent straight section and the stent near end of the stent ranges from Shore 25D to Shore 72D. Compared with a traditional stent of the same specification, the biliary tract stent capable of being accurately released has the advantages that the cross sectional area of an inner cavity is larger by 40%-100%, meanwhile, the inner surface of the stent is made of the super-smooth material, a biological membrane and bile mud are not prone to being attached, and the smooth time of the biliary tract stent is greatly prolonged.