791 results about "Fumed silica" patented technology

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 application discloses a kind of ship super-long anticorrosion special nano powder coating, preparation method and application, belong to ship heavy anticorrosion material technical field.The preparation method of the ship super-long anticorrosion special nano powder coating is as follows: epoxy resin, graphene modified epoxy resin, core-shell structure ZnO@SiO2, modified 2,5-dimercapto-1,3,4-thiadiazole, borosilicate glass powder, flaky boron nitride, silane coupling agent modified silica, phenolic amine curing agent, 2-ethyl-4-methylimidazole, fumed silica, defoaming agent, ultraviolet absorber, high-temperature pigment are put into stirrer and stirred for 20-30min, then melt extrusion is carried out through double screw extruder, the extrusion temperature is 90-110 DEG C, grinds and sieves, and the ship super-long anticorrosion special nano powder coating is obtained.The coating prepared by the application has good anticorrosion performance and can be applied in the field of ship metal surface corrosion protection.

The invention relates to the technical field of films, in particular to a high-surface tension aluminized base film and a preparation method thereof. The method comprises the following steps: grafting modified fumed silica with a silane coupling agent KH-570, and grafting a ternary polymerization shell layer composed of 2-acrylamide-2-methylpropanesulfonic acid, lauryl methacrylate and glycidyl methacrylate on the surface of the modified fumed silica to obtain organic anti-sticking silica; secondly, synthesizing an aromatic sulfonated polyester prepolymer, loading nano titanium dioxide, and carrying out melt blending extrusion with polypropylene to form polar cluster polypropylene master batches; and finally, blending polypropylene resin, the master batch and maleic anhydride grafted polypropylene, and carrying out melt extrusion, air cooling and slow cooling and two-way stretching molding. The obtained base film is high in surface tension, high in aluminized layer adhesive force, excellent in oxygen and water vapor barrier property, good in thermal stability and suitable for the field of high-end packaging.

The invention discloses a water-based single-component super-amphiphobic refrigeration coating, a coating and a preparation method of the coating, and relates to the technical field of coatings. 20-35 parts of a second filler; 5-10 parts of a third filler; 20-35 parts of a film-forming substance, 1-9 parts of an auxiliary agent and 3-50 parts of water; the first filler comprises fluorine-containing silane modified fumed silica; the second filler comprises at least one of long-chain silane modified precipitated barium sulfate, long-chain silane modified calcium carbonate and long-chain silane modified hollow glass beads; the third filler comprises an infrared emission filler treated by an organic silicon modifier. By modifying the filler, the purposes of stable dispersion and functional synergy of low-surface-energy substances and high-proportion inorganic nano filler in a water-based system are achieved.

The invention relates to a composite powder explosion suppressant for suppressing aluminum hydride explosion and a preparation method of the composite powder explosion suppressant, belongs to the technical field of explosion suppressants, and solves the problems of single action mechanism, high required explosion suppression concentration, low efficiency and the like of a traditional explosion suppressant. According to the solution, the composite powder explosion suppressant for suppressing aluminum hydride explosion is prepared through raw material pretreatment, powder mixing and drying in sequence, and the composite powder explosion suppressant is prepared from the following components in parts by mass: 10.2 to 30.2 parts of melamine cyanurate, 20.4 to 40.6 parts of monopotassium phosphate, 15.2 to 25.2 parts of potassium bicarbonate, 8.4 to 13.2 parts of aluminum hydroxide, 6.8 to 11.1 parts of zinc borate, 5.0 to 9.0 parts of fumed silica and 2.0 to 5.3 parts of calcium silicate. The explosion suppressant can act on different combustion areas and combustion stages in the aluminum hydride explosion process, the physical and chemical explosion suppression effects of all the components of the explosion suppressant are fully exerted, and meanwhile, efficient explosion suppression of aluminum hydride explosion can be achieved through the synergistic effect of all the components.

The invention relates to the technical field of shield tunnel construction, and discloses a shield tunnel segment joint waterproof material and a waterproof structure, the shield tunnel segment joint waterproof material comprises a component A and a component B; the component A comprises the following component: 30-40 parts of liquid polysulfide rubber; 5 to 10 parts of a fluorinated polyurethane prepolymer; 1-5 parts of a silane coupling agent; 3-5 parts of fumed silica; 8-15 parts of hollow glass beads; 10 to 15 parts of nano calcium carbonate; 0.5 to 2 parts of polytetrafluoroethylene micro powder; 0.1 to 1 part of ettringite; the component B comprises the following component: 1-5 parts of manganese dioxide; and 5 to 10 parts of dioctyl phthalate. By utilizing the characteristics that the sealing gasket has excellent fluidity during injection and can be automatically cured into a high elastomer within a set time, a pre-installed sealing gasket can be replaced by adopting an innovative injection process, and the construction difficulty faced by high-precision shield segment assembly in a high-water-pressure environment is effectively solved.

The invention provides a high-performance concrete anticorrosive paint and a preparation method of a coating, and relates to the technical field of building materials and corrosion prevention. The coating is composed of a component A and a component B, the component A comprises epoxy resin, a composite solvent, an organic solvent, a dispersant, fumed silica and a leveling agent, and the component B comprises an epoxy hardener, a conductive polymer dispersion liquid and an organic solvent. The composite solvent is formed by compounding one or more of orthotitanate, phosphate and orthosilicate with an ester, ketone, alcohol, aromatic hydrocarbon, aliphatic hydrocarbon or ether organic solvent. The preparation method of the anticorrosive coating comprises the following steps: preparing the component A and the component B, mixing to form a coating, applying the coating to the surface of concrete, and curing. The coating is compact in structure and strong in adhesive force, can obviously improve the durability and corrosion resistance of concrete in extreme environments such as high salinity and high acid, and is particularly suitable for infrastructure protection in coastal and heavy corrosion industrial areas.

The application belongs to the technical field of functional coating materials, and particularly relates to a kind of super-hydrophobic solution based on fumed silica and its preparation method and application, comprising: step one, 20-200nm fumed silica nanoparticles are dispersed in ethanol / water mixed system, and sodium dodecyl benzene sulfonate is added to prevent agglomeration;Step two, under the catalysis of ammonia, tetraethyl orthosilicate and 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane are added dropwise in sequence for fluorination modification;Step three, fluorinated silica nanoparticle suspension is prepared by ultrasonic-assisted reaction;Step four, the solution is sprayed onto the surface of ceramic substrate with micro-nano structure to form a coating;Step five, strong adhesion without adhesive is realized by mechanical anchoring effect.The application realizes super-hydrophobic performance of 153±0.5° high water contact angle and physical adhesion stability under 100-200g load by the synergistic effect of nanoparticle size effect and substrate surface topological structure, low surface energy of fluorinated alkyl chain and Cassie-Baxter air cushion layer effect, and is especially suitable for self-cleaning surface, anti-icing coating and marine corrosion prevention field.

The invention relates to a wear-resistant waterproof cable sheath material and a preparation method thereof, and belongs to the technical field of cable materials. The cable sheath material is prepared by self-making a modifier and blending the modifier with a fumed silica modified filler modified by a perfluoroalkyl silane coupling agent, FEP and polyethylene. Perfluoroalkyl of the modified filler and FEP cooperate to improve the water resistance and corrosion resistance of the material; the modifier can enhance the polarity of a polyethylene matrix, forms polarity gradient matching with other components of the system, enhances the interfacial compatibility, and improves the mechanical properties of the material; a benzotriazole structure in the modifier can prevent the material from being damaged by ultraviolet irradiation; besides, during combustion, phosphorus in the material forms a carbon layer on the surface, nitrogen in benzotriazole serves as a foaming agent to expand the carbon layer, efficient flame retardance is achieved synergistically, the material has excellent ultraviolet resistance and flame retardance, and the service life of the material is prolonged.

The invention relates to the technical field of protective film preparation, and particularly discloses an antistatic silica gel protective film and a preparation method thereof.The protective film comprises a base material layer and an antistatic coating coated on the surface of the base material layer; the base material layer is prepared from methyl vinyl silicone rubber, modified fumed silica, a compound antistatic agent A and a vulcanizing agent, and the antistatic coating is prepared from a compound antistatic agent B and water-based acrylic resin. The preparation method comprises the following steps: banburying, calendering and vulcanizing a compound antistatic agent A, methyl vinyl silicone rubber and modified fumed silica to form the base material layer; and finally, mixing the compound antistatic agent B with water-based acrylic resin to prepare an antistatic coating solution, coating the surface of the base material layer with the antistatic coating solution, and drying and curing to obtain a finished product. The silica gel protective film prepared by the invention has excellent antistatic property, mechanical property, adhesive force and high light transmittance, and is suitable for the fields of electronic equipment screens, optical lenses and the like.

The invention belongs to the technical field of composite polyurethane materials, and discloses a groutable high-bonding-strength composite polyurethane material and a preparation method thereof. The composite polyurethane material is prepared from the following raw materials in parts by mass: 15 to 20 parts of hydrophilic polyurethane grouting liquid, 15 to 20 parts of cement, 5 to 8 parts of silica powder, 8 to 10 parts of polyurethane diluent, 2 to 3 parts of titanate coupling agent, 0.5 to 1 part of fumed silica, 1 to 2 parts of rubber powder, 0.2 to 0.4 part of water reducing agent and 0.5 to 0.8 part of catalyst. According to the composite polyurethane material, the waterborne polyurethane-cement-silica powder is taken as main materials and matched with the functional auxiliaries, and through the synergistic effect of the multiple components, the composite polyurethane material has high permeability, rapid curing, strong adhesion and long-acting durability at the same time, and shows remarkable advantages in leakage treatment of underground engineering, tunnels and building foundations.

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 silicone rubber composite material, a silicone rubber-based high-voltage-resistant high-damping composite phase-to-phase spacer and a preparation method thereof, and belongs to the technical field of power transmission line galloping prevention. The composite phase-to-phase spacer is composed of a high-damping silicone rubber composite material and a structural component. The silicone rubber composite material comprises 100 parts of methyl vinyl silicone rubber, 20-40 parts of phenyl silicone rubber, 30-60 parts of fumed silica, 15-40 parts of organosilicon elastomer micro powder, 20-50 parts of modified sericite, 5-15 parts of carbon nanotubes, 10-30 parts of high rubber powder, 10-30 parts of calcined kaolin, 2-4 parts of diphenyl silanediol, 3-8 parts of phenyl silicone oil and 1.5-3 parts of a peroxide vulcanizing agent. The spacer has high damping performance (tan [delta] gt; 0.45, effective damping temperature range gt; -120 DEG C), high pressure (gt; 35 kV / mm) and strong anti-galloping capability, and the galloping phenomenon of the power transmission line under the action of deicing and wind load can be effectively inhibited.

The invention provides an organic silicon pouring sealant for a new energy automobile heater and a preparation method thereof, the organic silicon pouring sealant comprises a component A and a component B, the mass ratio of the component A to the component B is 1: 0.9-1.1; the component A comprises the following components in percentage by mass: 35%-45% of double-end vinyl silicone oil; 3-5% of modified silicone oil; 10%-20% of spherical silica powder; 35-45% of aluminum hydroxide; 0.1%-0.3% of fumed silica; 1%-2% of a molecular sieve; 0.3%-0.5% of a platinum catalyst; 0.1%-0.3% of carbon black; wherein the modified silicone oil is vinyl alkoxy terminated silicone oil. According to the technical scheme provided by the invention, hydroxyl silicone oil is subjected to alkoxy and vinyl end-capping modification, so that the organic silicon pouring sealant can form good bonding sealing with an aluminum alloy matrix and an electronic component when being cured at normal temperature, does not have obvious smell, and is convenient to use.

The invention relates to the technical field of special cables, and discloses a high and low temperature resistant composite insulating layer cable and a preparation method thereof.The cable comprises a conductor core and a composite insulating layer wrapping the conductor core, and the composite insulating layer comprises a high temperature resistant heat conduction core layer and a low temperature resistant elastic layer; the high-temperature-resistant heat-conducting core layer is prepared from the following raw material: polyamide acid; hexagonal boron nitride; alpha-phase silicon carbide; the preparation method comprises the following steps: adding gamma-amino propyl triethoxy silane; nano barium titanate; the low-temperature-resistant elastic layer is prepared from the following raw materials: vinyl terminated polydimethylsiloxane; performing hydrophobic treatment on fumed silica; a Karstedt catalyst; a hydrogen-containing silicone oil crosslinking agent; the average particle size D50 of the 1-ethynyl-1-cyclohexanol and the alpha-phase silicon carbide is 0.5 to 2 mu m. According to the invention, by adopting a microwave selective heating and interlayer heat conduction mechanism, efficient and high-quality integrated curing of the composite insulating layer is realized.

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.

A silicone rubber insulator shed material, and a silicone rubber insulator and a preparation method therefor and an application thereof. The components of the silicone rubber insulator shed material comprise silicone rubber, iron oxide, nano-montmorillonite, fumed silica, aluminum hydroxide, a silane coupling agent, a vulcanizing agent, and hydroxy silicone oil, wherein the iron oxide and the nano-montmorillonite can slow down the thermal oxidation decomposition of the silicone rubber, thus improving the hydrophobicity, hydrophobic mobility and hydrophobic recovery of the silicone rubber composite insulator, thereby solving the technical problem in the prior art that the aging decomposition resistance of silicone rubber needs to be improved.

The invention relates to a self-cleaning anticorrosive material and a preparation method thereof, and belongs to the technical field of anticorrosive materials. The preparation method comprises the following steps: preparing a self-made modifier, modifying high-density polyethylene through the modifier to obtain modified high-density polyethylene, and blending the modified high-density polyethylene with polydimethylsiloxane and fumed silica to obtain the self-cleaning anticorrosive material. Nano silicon dioxide particles can be fixed on the surface of high-density polyethylene through silicon-oxygen-silicon covalent bonds and are similar to the main chain structure of polydimethylsiloxane, so that the three phases have good interfacial compatibility, and the polydimethylsiloxane has excellent chemical inertness and hydrophobicity, so that the surface of the high-density polyethylene is protected. After being blended with polyethylene, the material has good hydrophobicity, so that the self-cleaning anti-corrosion characteristic is realized.

The invention discloses flame-retardant tracking-resistant silicone rubber as well as a preparation method and application thereof. The flame-retardant tracking-resistant silicone rubber comprises the following components in parts by mass: 100 parts of methyl vinyl silicone rubber; 30 parts to 45 parts of fumed silica; 4 to 8 parts of hydroxyl silicone oil; 0.4 part to 0.8 part of hydrogen-containing silicone oil; 1-3 parts of a vulcanizing agent; 2 to 5 parts of a layered nano material modified by a nitrogen-containing organic silicon boron compound; and 10 ppm to 20 ppm of an organic platinum catalyst. The flame-retardant tracking-resistant silicone rubber disclosed by the invention has the advantages of excellent flame retardance, tracking resistance, mechanical property, processability, thermal stability and the like, has a wide application prospect in the fields of extra-high voltage power transmission and transformation, special equipment, new energy automobiles and the like, and is simple in preparation method, easily available in raw materials, low in cost and suitable for industrial production. The method is suitable for large-scale industrial production and application.

The invention relates to the technical field of preparation of chlorosulfonated polyethylene gloves, and discloses a chlorosulfonated polyethylene glove and a preparation method thereof, the glove is prepared from the following raw materials: chlorosulfonated polyethylene rubber, a composite rubber matrix, a reinforcing filler, a functional additive, a vulcanization system, an anti-aging agent and fluorosilicone resin; by adding the nano titanium dioxide, the fumed silica and the zinc oxide, the barrier property to grease and organic solvents is remarkably improved, meanwhile, the fluorosilicone resin is compounded with a rubber matrix due to the oleophobic and hydrophobic characteristics, a double-effect barrier is formed, and the problem that single chlorosulfonated polyethylene insufficiently protects part of solvents is solved; the composite antioxidant 1010 and the ultraviolet absorbent UV-531 have a synergistic effect, the antioxidant 1010 inhibits thermo-oxidative aging, the UV-531 efficiently absorbs ultraviolet bands, and the weather resistance of fluorosilicone resin is combined, so that the degradation rate in ultraviolet radiation and high-temperature environments is remarkably reduced, and the service life of the glove is prolonged.

The invention discloses an organic silicon defoaming composition for an anti-cancer drug and a preparation method of the organic silicon defoaming composition, and relates to the technical field of defoaming agents. The organic silicon defoaming composition is prepared from the following raw materials in parts by weight: 60 to 70 parts of polyether modified silicone oil, 10 to 15 parts of fumed silica, 4 to 6 parts of a surfactant, 3 to 6 parts of a dispersing agent, 1 to 2 parts of a thickening agent, 5 to 8 parts of a stabilizer and 20 to 30 parts of deionized water. The organic silicon defoaming composition prepared by the invention has good defoaming and foam-inhibiting performance, dispersing performance and high-temperature stability.

The invention discloses an antibacterial coating which comprises a component A and a component B. The component A comprises the following raw materials in parts by weight: 40-60 parts of epoxy resin, 15-35 parts of polyamide resin, 5-10 parts of tea tree essential oil, 1-3 parts of di (2-ethylhexyl) phthalate, 1-2 parts of fumed silica, 1-2 parts of acrylate, 1-2 parts of sodium phosphate and 1-2 parts of polyvinyl ether. The component B comprises the following raw materials in parts by weight: 20-30 parts of modified nano zinc oxide, 40-60 parts of an antibacterial curing agent, 15-20 parts of butanol and 2-10 parts of acetone. The weight ratio of the component A to the component B is 8: (2-4), and the water-resistant coating is excellent in mechanical property, high in adhesive force and good in water resistance.

The invention relates to the field of sealing materials, in particular to a heat-resistant and oil-resistant sealing gasket for an engine and a preparation method of the heat-resistant and oil-resistant sealing gasket. The liquid silicone rubber is prepared from the following raw materials in percentage by weight: 60-80% of a liquid silicone rubber base material, 15-28% of an oil-resistant heat-resistant base material, 0.1-3% of a cross-linking agent, 0.1-0.6% of a catalyst and the balance of a processing aid, the oil-resistant and heat-resistant base material is prepared from an inorganic filler, aramid pulp, polyhedral oligomeric silsesquioxane-alcoholic hydroxyl group, an activation dispersant and a double-active-group-epoxy silane coupling agent; the activation dispersant is a trihydroxymethyl caprolactone cross-linked polymer and / or bis (pinacol) borate; and the inorganic filler is composed of a plurality of components selected from fumed silica powder, nano-scale ceramic powder and zinc borate nano-powder. The oil-resistant and heat-resistant base material obtained by the scheme interacts with the silicone rubber base material, so that the prepared heat-resistant and oil-resistant sealing gasket for the engine has better comprehensive performance.

The invention discloses an environment-friendly anti-icing and deicing coating as well as a preparation method and application thereof, and aims to solve the problems of low efficiency, high corrosivity, serious environmental pollution and the like in the traditional anti-icing and deicing technology. The coating material is prepared from the following components: deionized water, polyvinylpyrrolidone, propylene glycol, glycerol, fumed silica, granular silica, ethanol, potassium acetate and a waterborne polyurethane coating. The invention further provides a preparation method of the coating material, and the coating material is applied to anti-icing of metal and plastic substrates and has dual functions of preventing icing and rapidly removing ice. The coating has the advantages of being good in durability, environmentally friendly, free of corrosion to base materials and the like, is particularly suitable for anti-icing protection of equipment such as rails, wind power blades and cables, remarkably improves the operation and maintenance efficiency of key facilities and equipment, reduces the maintenance cost and has important economic and social benefits.

The invention relates to a double-self-repairing hydroxyl acrylic coating and a spraying process thereof, and belongs to the technical field of coatings. Comprising 50 to 60 parts of a hydroxy acrylic resin-furan modified copolymer, 5 to 10 parts of a maleimide compound, 3 to 8 parts of propylene glycol methyl ether acetate, 5 to 10 parts of dimethyl carbonate, 5 to 8 parts of polyurethane microcapsules, 5 to 7 parts of carbon black, 2 to 5 parts of modified titanium dioxide, 0.8 to 1.2 parts of a modified polyether siloxane leveling agent and 0.2 to 0.4 part of an organic bismuth-zinc composite drier. 2 to 5 parts of fumed silica; and 1 to 2 parts of nano montmorillonite. The paint provided by the invention can form a uniform and continuous coating on the surface of a base material. When the coating is damaged by scratches and the like, self-repairing can be achieved through double mechanisms. According to the spraying process, the polyurethane microcapsules and the matrix resin are separately mixed, and breakage caused by direct mixing of the microcapsules and the resin can be effectively avoided.

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 high-elasticity anti-aging foamed silica gel sealing element, and belongs to the technical field of sealing materials. The silicone rubber is prepared from raw materials including methyl vinyl silicone rubber, fumed silica, hydroxyl-terminated polydimethylsiloxane and the like according to specific parts by weight through the processes of mixing, foaming vulcanization and the like. The apparent density of the sealing element is 0.3-0.6 g / cm < 3 >, the Shore A hardness is 25-45 degrees, the tensile strength is larger than or equal to 2.5 MPa, the elongation at break is larger than or equal to 350%, the performance retention rate is high after the sealing element is aged for 1000 h at the temperature of 150 DEG C, and the sealing element has excellent elasticity and aging resistance. The surface of the anti-slip sealing gasket can be provided with anti-slip textures to meet sealing requirements in the fields of automobiles, electronics and the like, and is long in service life and high in practicability.

The invention discloses an explosion-proof coating as well as a preparation method and application thereof. The raw materials of the coating comprise a component A and a component B, and the mass ratio of the component A to the component B is (100: 100)-(100: 50); wherein the component A is prepared from the following components in parts by weight: 70 to 90 parts of epoxy resin, 3 to 8 parts of reactive diluent, 2 to 6 parts of silane coupling agent and 0.5 to 3 parts of fumed silica; and the component B comprises the following components in parts by weight: 30-60 parts of a nano reinforced curing agent, 5-30 parts of aluminum hydroxide, 8-15 parts of ammonium polyphosphate, 3-10 parts of expanded graphite, 3-8 parts of zinc phosphate, 3-12 parts of hollow glass beads, 3-15 parts of hexagonal boron nitride, 3-10 parts of silicon carbide whiskers, 2-5 parts of graphene dispersion liquid, 5-10 parts of a solvent, 0.2-1.5 parts of a dispersing agent and 0.1-1 part of a defoaming agent. The coating disclosed by the invention has the functions of toughening, flame retardance, heat conduction and non-combustible gas release, and can be applied to flame-retardant and explosion-proof products.

The invention discloses a preparation method of a warm-keeping and health-care composite fabric, and relates to the technical field of functional fabrics. The preparation method comprises the following steps: firstly, combining fumed silica with graphene oxide hydrogel to prepare mixed aerogel; the mixed aerogel is combined with allyl trichlorosilane, and is grafted to a macromolecular chain of polypropylene through maleic anhydride, so that the compatibility is improved, and the agglomeration problem is solved; secondly, calcining tourmaline, then directly carrying out quenching hydration modification, combining Si-OH groups on the surface with active groups in a polyester molecular chain, and spinning into hollow fibers; the mixed aerogel can absorb far infrared rays dissipated and emitted by the modified tourmaline, and the aerogel absorbing the far infrared rays can generate a resonance effect and a warm effect and permeate into the deep layer of the skin; the modified tourmaline has the capability of generating negative ions, and the gull rock powder is added for combined action, so that the antibacterial effect is achieved by destroying the structure of bacteria, and the health-care effect is achieved. The composite fabric prepared by the invention has warm-keeping and health-care effects.

The invention discloses a water-based organic silicon coating and a preparation method thereof, the water-based organic silicon coating is prepared by reaction of an organic silicon prepolymer and hydrogen-containing silicone oil, the organic silicon prepolymer is prepared by reaction of a siloxane reactant and a vinyl silane reactant, and no Si-H bond structure exists in the organic silicon prepolymer. The invention develops a synthetic route for preparing the metal protection type water-based organic silicon coating through two components, the number of Si-H bond structures in the reaction is reduced by controlling the Si-H bond structures in the organic silicon prepolymer, coating bubbling caused by generation of gas is prevented, and the crosslinking density is reduced. An inorganic-organic polymer coating with a certain space structure is formed under the action of nano-scale fumed silica through addition reaction of an organic silicon prepolymer and hydrogen-containing silicone oil and hydrolysis-condensation reaction of methoxyl of the organic silicon prepolymer, so that the performance stability of a finished product of the coating is improved; and the coating has excellent mechanical property, anti-sticking property and anti-corrosion property.