3331 results about "Modified carbon" patented technology

The invention provides a road construction project carbon emission ratio toughness analysis method, and belongs to the technical field of carbon emission, machine learning and big data analysis and mining, and the method comprises the steps: obtaining a historical change trend of a carbon emission ratio from historical data of a road construction project, and constructing a dynamic change model of the carbon emission ratio in combination with real-time monitoring data; determining the influence degree and the action mechanism of the interference factors on the carbon emission ratio dynamic change model by analyzing the interaction relationship between the carbon emission ratio and the interference factors; key fluctuation characteristics are extracted from the corrected change trend of the carbon emission ratio, and whether fluctuation of the carbon emission ratio exceeds an acceptable range or not is judged in combination with a preset threshold value; if the fluctuation of the carbon emission ratio exceeds a preset threshold value, performing noise reduction processing on the data by adopting an adaptive filtering algorithm to generate noise-reduced carbon emission ratio data; and training the segmented analysis result by adopting a random forest model in a machine learning algorithm to generate a prediction model of the carbon emission ratio.

The invention provides a modified three-dimensional porous carbon-based silicon-carbon negative electrode material and a preparation method thereof, and belongs to the technical field of lithium ion battery negative electrode materials. The preparation method comprises the following steps: mixing an organic carbon source and a conductive agent in a solution, and sequentially drying, curing and carbonizing the obtained mixture under an inert gas condition to obtain a modified carbon precursor; carrying out activating treatment on the modified carbon precursor under an inert gas condition to obtain a modified three-dimensional porous carbon skeleton; under the condition of protective gas, introducing silane gas into the modified three-dimensional porous carbon skeleton, and carrying out vapor deposition to obtain a silicon / modified three-dimensional porous composite material; and under the condition of protective gas, introducing carbon source gas into the silicon / modified three-dimensional porous composite material, and carrying out vapor deposition to obtain the modified three-dimensional porous carbon-based silicon-carbon negative electrode material. The prepared modified three-dimensional porous carbon-based silicon-carbon negative electrode material is low in expansion rate, good in cycle performance and excellent in conductivity.

The invention belongs to the technical field of polymer plastic materials, and particularly relates to a high-temperature-resistant anti-corrosion polytetrafluoroethylene material and a preparation method thereof. The polytetrafluoroethylene is prepared from the following raw materials in parts by weight: 50 to 60 parts of polytetrafluoroethylene, 5 to 10 parts of fluorinated modified graphene oxide, 3 to 5 parts of aluminum powder, 5 to 8 parts of modified silicon carbide fiber, 3 to 5 parts of silane modified nano silicon dioxide, 2 to 3 parts of polyphenylene sulfide, 2 to 3 parts of polyimide, 0.5 to 0.8 part of dispersing agent and 0.5 to 1 part of antioxidant. The heat conduction performance and the interface bonding force are improved through the fluorinated modified graphene oxide, the impact resistance and the wear resistance are enhanced through the silicon carbide fibers, and the corrosion resistance and the wear resistance are improved through the aluminum powder; silane modified silicon dioxide enhances the mechanical property of the composite material by improving the dispersity of the filler, and PPS and PI interact with the surface of the filler through polar groups in molecular chains, so that the interface strength is improved, and the toughness and the thermal stability are improved.

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

The invention relates to the technical field of epoxy resin composite materials, in particular to an epoxy resin-based composite material and a preparation method thereof. The epoxy resin-based composite material comprises modified carbon fibers and an epoxy resin base material impregnated on a modified carbon fiber matrix, and the epoxy resin base material comprises the following raw materials in parts by weight: 80-100 parts of epoxy resin, 4-18 parts of a toughening elastomer, 24-45 parts of a curing agent and 1-3 parts of an accelerant. The carbon fibers are subjected to surface grafting hyperbranched molecular modification, so that the interface action between the modified carbon fibers and an epoxy resin matrix can be remarkably enhanced, and meanwhile, the high strength and high temperature-resistant stability of the carbon fibers are utilized, so that the epoxy resin-based composite material has good toughening, reinforcing and temperature resistance improving effects.

The invention relates to the technical field of polymeric membrane materials, and particularly discloses an antistatic polyethylene composite membrane and a preparation method thereof. Comprising the following raw materials in parts by weight: 100 parts of low-density polyethylene, 5-9 parts of high-density polyethylene, 10-20 parts of maleic anhydride grafted polyethylene, 8-15 parts of a polyvinyl alcohol modified material, 3-5 parts of antistatic modified carbon black, 0.5-1 part of an antioxidant and 1-2 parts of a dispersing agent, the polyethylene composite film has excellent dispersibility, can effectively enhance the mechanical properties of the polyethylene composite film through the synergistic effect of physical filling and chemical grafting, forms a layer of conductive network structure, namely a conductive film, on the surface of the material through the combined effect of the polyethylene composite film and the antistatic agent, prevents the generation and accumulation of static electricity, and has good compatibility among the raw materials. And the material has excellent mechanical property and antistatic property.

The invention relates to a shielding material for a high-voltage cable, in particular to a semiconductor shielding material, a semiconductor shielding layer and a preparation method of the semiconductor shielding layer. According to the invention, a certain amount of modified carbon nanotubes are added on the basis of the raw materials of the existing polymer semiconductor shielding layer added with carbon black, and the modified carbon nanotubes are used for replacing part of carbon black, so that the polymer semiconductor shielding layer with good conductivity and high interface smoothness is prepared. The surface of the modified carbon nanotube is grafted with organic silicon and a polar ethylene polymer, so that the dispersity of the modified carbon nanotube in a polymer semiconductor shielding material system and the compatibility of the modified carbon nanotube with the resin surface are improved; the viscosity of a polymer semiconductor shielding material system under high shear strength is greatly reduced, so that the flowability of the system is greatly improved; the semi-conductive shielding material which is suitable for HV and EHV cables and has super smoothness and strong conductivity is obtained.

The invention relates to high-temperature-resistant flame-retardant smoke-suppressing silicone rubber and a preparation method thereof. The silicone rubber comprises the following components in parts by weight: 50-70 parts of methyl vinyl silicone rubber; 5-10 parts of an organosilicon compound; 10-20 parts of an inorganic metal oxide; 20 to 30 parts of modified carbon black; 20 to 30 parts of a compound flame retardant; 4-6 parts of a vulcanizing agent; the modified carbon black is silanized carbon black; the compound flame retardant is formed by inserting zinc borate into graphite layers. Compared with the prior art, the obtained silicone rubber has good high-temperature stability and excellent aging resistance, through synergistic compounding of the modified carbon black, the compound flame retardant and the metal oxide, the effects of smoke suppression, flame retardance and high temperature resistance are achieved, the mechanical property of the silicone rubber is remarkably improved, and the service life of the silicone rubber is prolonged. The application range of the silicone rubber product is wider, and the economic value is good.

The invention discloses a high-flexibility winding-resistant robot cable, and relates to the technical field of robot cables, the robot cable comprises a plurality of cable cores, the cable cores are wrapped by a belting layer, a twisting gap of the cable cores is filled with a filler, the belting layer is wrapped by a shielding layer, and the shielding layer is wrapped by an outer sheath layer; the outer sheath layer is prepared from the following components: 80-100 parts of PVC resin, 30-60 parts of nitrile rubber powder, 20-30 parts of a polyolefin thermoplastic elastomer, 10-30 parts of trioctyl trimellitate, 5-15 parts of dioctyl sebacate, 5-25 parts of aluminum hydroxide, 8-15 parts of carbon black, 10-20 parts of modified carbon fiber, 3-6 parts of a heat stabilizer, 1-3 parts of an antioxidant and 1-3 parts of a lubricant; optimized balance of flexibility, bending resistance, mechanical strength and environmental adaptability is achieved, and a high-performance and long-service-life key component is provided for modern industrial automation and robot application.

The invention relates to the technical field of high polymer materials, and particularly provides a self-repairing type UV curing alumite color layer coating and a preparation method thereof. The water-based ink is prepared from, by weight, 30-50 parts of polyurethane acrylic resin, 10-25 parts of modified acrylic oligomer containing dynamic covalent bonds, 2-5 parts of photoinitiator, 3-8 parts of hydrophobic modified nano filler and 1-3 parts of cross-linking agent, and the dynamic covalent bonds are selected from at least one of hydrazide bonds, boric acid ester bonds and Diels-Alder bonds. By introducing a gradient energy collaborative network of dynamic covalent bonds and quadruple hydrogen bonds, rapid self-repairing of the coating at normal temperature and thermal triggering recombination of deep damage are achieved, and meanwhile through the micro-phase separation design of the hydrophobic core-shell filler and the graft modified silicon carbide nanowires, the hydrolysis resistance is improved.

The invention relates to the field of composite materials, and discloses an unmanned aerial vehicle carbon fiber shell preparation method, which comprises: carbon fiber surface modification treatment: carrying out surface cleaning, activation, chemical plating and surface functional modification on carbon fibers; preparing a resin matrix: mixing epoxy resin with a flexible toughening agent, a nano filler and a curing agent, and carrying out vacuum defoaming; carbon fiber laying: laying the modified carbon fiber cloth according to a set angle and sequence; vacuum bag forming: performing vacuum sealing on the laid carbon fiber composite material; and hot-pressing and curing: curing the composite material in an autoclave under the process conditions of set temperature, pressure and time. Through collaborative design of interface modification, matrix enhancement and process optimization, the comprehensive performance of the composite material is improved, so that the requirements of the unmanned aerial vehicle shell for high strength, fatigue resistance and impact resistance are met.

The invention provides conductive paste for a heterojunction solar cell and a preparation method of the conductive paste, and belongs to the field of conductive paste. The spherical nano-silver, the silver nanowires and the silver nanosheets are introduced, a three-dimensional conductive network is formed through three metal shapes, the conductivity of the paste is remarkably improved, high stability is kept in long-term use through the synergistic effect, and degradation of the conductivity is avoided; the carbon nanotubes are modified through mixed acid and a coupling agent, so that the dispersity is improved, the interface bonding force is enhanced, and the conductivity and mechanical strength of the slurry are improved; according to the graphene, the dispersity and compatibility are improved through introduction of sulfydryl, and the conductivity is restored through reduction of sodium borohydride; silver-coated silicon carbide is used as a filler to improve conductivity, retain hardness of silicon carbide, enhance wear resistance of the slurry and prolong service life; through the synergistic effect of the modified carbon nanotubes, the modified graphene and the silver-coated silicon carbide, the paste shows excellent performance in the aspects of conductivity, thermal stability and mechanical strength.

The invention relates to the technical field of woven ceramic materials, in particular to a high-toughness woven ceramic material and a preparation method thereof, and the high-toughness woven ceramic material comprises the following raw materials in parts by weight: 30-40 parts of diopside, 20-30 parts of quartz, 10-15 parts of silicon carbide, 7-11 parts of boron nitride, 6-10 parts of a modified carbon nanotube reblended admixture, 5-7 parts of an intercalated synergistic supplement, 4-6 parts of aluminum oxide, 10-15 parts of water and 3-5 parts of a sodium dodecyl benzene sulfonate solution. According to the high-toughness woven ceramic material, the diopside is matched with the quartz, the silicon carbide, the boron nitride and the aluminum oxide raw materials, the blending and matching effects of the raw materials are optimized by improving the interfacial activity of the sodium dodecyl benzene sulfonate solution, and meanwhile, the added modified carbon nanotube reblended admixture and the intercalated synergistic supplement are used for carrying out coordination and synergistic effects, so that the high-toughness woven ceramic material is prepared. The durable usability of the product is enhanced, the fracture toughness of the product is excellent, the scrubbing-resistant and corrosion-resistant stability effects are remarkable, and the performance improvement effect of the product is remarkable.

The invention relates to the technical field of tungsten alloy, and discloses a tungsten alloy material and a preparation method thereof.The tungsten alloy material comprises, by mass, 90-100 parts of modified tungsten powder, 8-10 parts of nickel powder, 5-7 parts of iron powder, 4-6 parts of cobalt powder and 1-3 parts of modified carbon fibers. The nickel powder, the iron powder and the cobalt powder in the molten state permeate into the tungsten powder through pores evenly distributed in porous carbon on the surface of the modified tungsten powder to form a uniform and compact alloy material, and the situation that due to the large melting point difference between the tungsten powder and the nickel powder, the iron powder and the cobalt powder, the nickel powder, the iron powder and the cobalt powder are distributed unevenly in the tungsten alloy material, and the mechanical strength of the alloy material is reduced is avoided; the pretreated silicon carbide whiskers are adhered to the surface of the carbon fiber loaded with the graphene oxide to form modified carbon fiber, so that interface stress can be absorbed and dispersed, stress concentration is reduced, cracks and debonding phenomena at an interface are prevented, and the mechanical performance of the tungsten alloy material is enhanced.

The invention discloses preparation and application of a diatomic catalyst modified carbon felt electrode. The preparation method of the modified carbon felt electrode comprises the following steps: dissolving bismuth salt, cobalt salt and urea in water to obtain a complexing solution; immersing the carbon felt substrate subjected to acid activation into a complexing solution for soaking treatment, then taking out the carbon felt substrate, and drying to obtain a precursor-loaded carbon felt; and sequentially carrying out primary heating, cold shock and secondary heating treatment on the precursor-loaded carbon felt, and cooling to obtain the Bi-Co diatom modified carbon felt electrode. The carbon felt electrode can be applied to an all-vanadium redox flow battery. The innovation point of the invention lies in that through the synergistic effect of double atoms and the mutual cooperation of the nitrogen-doped carbon substrate, the intrinsic activity bottleneck of the traditional catalyst is broken through, the comprehensive advantages of high catalytic activity, excellent stability and low cost are achieved, and a new technical solution is provided for the high performance and large-scale application of the flow battery.

The invention discloses a modified carbon-coated sodium manganese ferric phosphate pyrophosphate / sodium ferric phosphate pyrophosphate positive electrode material as well as a preparation method and application thereof, and relates to the technical field of new energy materials. The preparation method comprises the following steps: preparing MnFe-MOF from a manganese source, a first iron source and a first organic ligand under a hydrothermal reaction; a second iron source, the MnFe-MOF and a second organic ligand are subjected to a hydrothermal reaction, and MnFe-MOF / Fe-MOF is obtained; uniformly mixing with a sodium source and a phosphorus source, and sintering to obtain a positive electrode material; and carrying out high-temperature gas-phase etching treatment to obtain the fluorine-doped carbon-coated modified sodium manganese ferric phosphate pyrophosphate / sodium ferric phosphate pyrophosphate positive electrode material. The material disclosed by the invention has a coating modified structure, so that an interface side reaction caused by direct contact between sodium ferromanganese phosphate and an electrolyte can be effectively avoided, a manganese dissolution phenomenon is reduced, and the structural stability of the material is improved; and meanwhile, the material has high conductivity, excellent structural stability, excellent long cycle life and excellent rate capability.

The invention discloses a composite rubber material with wear resistance and high tear strength and a preparation method of the composite rubber material, and belongs to the technical field of rubber material processing. The technical problem that the enhancement effect of the filler on the wear resistance, tear resistance and mechanical strength of a rubber matrix needs to be further improved exists in the prior art. The composite material comprises the following components in parts by weight: 100-110 parts of internal mixed rubber, 1-2 parts of a vulcanization accelerator and 2-3 parts of a vulcanizing agent, modified polybutadiene is reinforced by aramid pulp, modified carbon black and modified graphene to prepare composite polybutadiene, and then styrene butadiene rubber is reinforced and modified by the prepared composite polybutadiene and silicone rubber to prepare the composite material. By improving the degree of crosslinking between material molecules and optimizing material composition, the wear resistance and tear resistance of the composite rubber material are effectively improved, and the mechanical property of the composite rubber material is also improved.

The invention discloses a uniform carbon-coated lithium iron phosphate positive electrode material and a preparation method thereof, and relates to the technical field of lithium iron phosphate positive electrode materials, the uniform carbon-coated lithium iron phosphate positive electrode material comprises lithium iron phosphate matrix particles, the lithium iron phosphate matrix particles are coated with a composite carbon layer, and the composite carbon layer is doped with cerium modified tantalum carbide nanocrystals; the preparation method of the cerium modified tantalum carbide nanocrystal comprises the following steps: dissolving pentaethoxy tantalum and cerous nitrate in ethylene glycol, adding urea as a precipitator, and synthesizing a Ta-Ce-O precursor through a microwave-assisted solvothermal method; the Ta-Ce-O precursor and phenolic resin are mixed and then subjected to ball milling and sintering, and the cerium modified tantalum carbide nanocrystal is obtained. By introducing a small amount of cerium modified tantalum carbide nanocrystals into the composite carbon layer for many times, uniform coating of the composite carbon layer can be realized, and the electrochemical performance of the lithium iron phosphate positive electrode material is enhanced.

The invention belongs to the technical field of fuel cell electrode material preparation, and particularly relates to a carbon electrode material for a polypyrrole modified bio-based fuel cell and a preparation method of the carbon electrode material. Comprising the following steps: modifying rice hull low-temperature carbonized powder by sequentially adopting POSS (Polyhedral Oligomeric Silsesquioxane) containing unipolar functional groups and POSS containing polypolar functional groups to obtain modified low-temperature carbonized powder; and carrying out in-situ polymerization on a pyrrole monomer on the surface of the modified low-temperature carbonized powder, and carrying out high-temperature carbonization and hydrofluoric acid corrosion to obtain the polypyrrole modified bio-based fuel cell carbon electrode material. The polypolar functional group POSS not only is beneficial to the in-situ polymerization reaction of pyrrole, but also can form a continuous macromolecular chain, and a net structure is formed on the surface of the whole material. The effect of the unipolar functional group POSS is to improve the stability of the low-temperature carbonized powder in the high-temperature carbonization process, and more importantly, the unipolar functional group POSS is to provide a channel for subsequent hydrofluoric acid corrosion, etch away non-conductive substances and improve the conductivity and specific surface area of the carbon electrode material.

The invention relates to the field of mortar, and discloses environment-friendly waste tire particle modified premixed mortar and a preparation method thereof. The environment-friendly waste tire particle modified premixed mortar is prepared from the following raw materials in parts by weight: 350 to 420 parts of cement, 100 to 150 parts of fly ash, 150 to 220 parts of modified waste tire particles, 10 to 25 parts of modified carbon nanotubes, 500 to 700 parts of fine aggregate, 4 to 7 parts of a water reducing agent, 15 to 20 parts of an early strength agent, 2 to 5 parts of a photoinitiator, 1 to 3 parts of a defoaming agent, 0.4 to 1 part of a thickening agent and 190 to 275 parts of deionized water. The modified waste tire particles are obtained by introducing a plurality of crosslinking sites on the surfaces of the waste tire particles by utilizing semi-closed isophorone diisocyanate; the modified carbon nanotubes are prepared by forming polydopamine through in-situ auto-polymerization of dopamine, then performing in-situ growth of nano silicon dioxide and further introducing fluorine-containing long chains and sulfydryl groups, and the mortar is endowed with excellent mechanical strength and impermeability by adding the modified waste tire particles and the modified carbon nanotubes.

The invention relates to the technical field of nylon 6, and discloses a carbon nanotube grafted ABS modified nylon 6 composite material, acylating chlorinated carbon nanotubes and lysine are subjected to an amidation reaction, double bonds on ABS and double bonds on maleic anhydride are combined, anhydride modified ABS and amino modified carbon nanotubes are subjected to a ring-opening reaction, and the carbon nanotube grafted ABS modified nylon 6 composite material is obtained. The carbon nanotubes are grafted to the ABS, agglomeration of the carbon nanotubes is avoided, the carbon nanotubes can form a uniform network structure under the action of external force, a large amount of external force is absorbed, the toughness of a matrix is improved, a large amount of carboxyl introduced to the surface of the ABS plastic and amide groups in the nylon 6 matrix are subjected to hydrogen-bond interaction, a three-dimensional hydrogen-bond network is formed, and the toughness of the matrix is improved. According to the present invention, the compatibility and the interfacial force between the nylon 6 and the carbon nano-tube grafted ABS are improved, such that the nylon 6 and the carbon nano-tube grafted ABS can be uniformly distributed so as to form the sea island structure, and can buffer more stress effects under the action of the external force, such that the obtained composite material has excellent toughness.

The invention discloses high-thermal-conductivity carbon black and a preparation method and application thereof, and relates to the technical field of carbon black modification.The preparation method of the high-thermal-conductivity carbon black comprises the following steps that carbon black is subjected to oxidation treatment, silanization treatment and tannic acid coating treatment, and modified carbon black is obtained; preparing a graphene / boron nitride / modified carbon black multi-dimensional filler; carrying out primary modification on the graphene / boron nitride / modified carbon black multi-dimensional filler by adopting lignin, polyvinylpyrrolidone and samarium chloride, and then carrying out secondary modification by adopting 6-aminocaproic acid to obtain the high-thermal-conductivity carbon black. The high-thermal-conductivity carbon black prepared by the invention not only has good dispersity, but also can well improve the thermal conductivity and mechanical properties of a rubber matrix.

The invention relates to the technical field of high polymer materials, and discloses a PPE material based on carbon nanotubes and a preparation method thereof. The PPE material prepared by the invention is prepared from the following raw materials in parts by weight: 50-70 parts of polyphenyl ether resin, 8-15 parts of high impact polystyrene, 8-12 parts of modified carbon nanotubes, 5-9 parts of a modified flame retardant, 1-2 parts of a compatilizer, 0.5-1.5 parts of an antioxidant and 0.5-2 parts of a lubricant, the material is an antistatic and flame-retardant material based on carbon nanotubes. Wherein the modified carbon nanotubes can improve the conductivity of the matrix so as to improve the antistatic performance, and the modified flame retardant can have a synergistic effect with phosphate groups in the modified carbon nanotubes so as to significantly improve the flame retardant performance of the matrix.

The invention relates to the technical field of automobile tires, and discloses a new energy automobile tire self-repairing sealing material adhered with mute cotton. The preparation method comprises the following steps: adding a modified polyurethane adhesive, C5 petroleum resin and a modified carbon nanotube filler into absolute ethyl alcohol, mixing to obtain a self-repairing liquid, adhering polyurethane cotton to the upper part of the self-repairing liquid, and drying to obtain the new energy automobile tire self-repairing sealing material adhered with the mute cotton. Disulfide bonds, boric acid ester bonds and imine bonds introduced into polyurethane through a chain extension reaction and diselenide bonds introduced into carbon nanotubes all belong to dynamic covalent bonds, so that the self-repairing performance of the material is improved; by introducing a rigid benzene ring and naphthyl aromatic structure, the mechanical property of the self-repairing sealing material is improved; the carbon nano tube can play a role in skeleton supporting in a polyurethane matrix, and the mechanical property of the material is further improved by introducing an adamantane rigid structure into the carbon nano tube.

The invention discloses a tungsten alloy material containing a silicon carbide reinforced Al2O3-SiO2-based multiphase ceramic coating and a preparation method of the tungsten alloy material, and belongs to the field of ceramic material preparation. The method comprises the following steps: ball-milling and mixing powder raw materials containing modified silicon carbide, aluminum oxide, silicon dioxide and lead oxide with a solvent, and defoaming to obtain ceramic slurry; the ceramic slurry is brushed on the surface of a tungsten alloy matrix subjected to surface pretreatment, and after drying, vacuum sintering is performed to obtain the tungsten alloy. The compact silicon carbide reinforced Al2O3-SiO2-based multiphase ceramic coating is introduced to the surface of a tungsten alloy matrix, the hardness, the high-temperature oxidation resistance and the high-temperature carburization resistance of a tungsten alloy material are remarkably improved, the stability of the coating can be improved through the silicon carbide distributed in a dispersed point shape, the thermal expansion coefficient of the coating is evenly reduced, and the hardness, the high-temperature oxidation resistance and the high-temperature carburization resistance of the tungsten alloy material are improved. The thermal expansion coefficient difference value between the multiphase ceramic coating and a tungsten alloy matrix is reduced, and the thermal shock resistance of the coating is improved.

The invention relates to the technical field of carbon nanotube materials, in particular to high-dispersity carbon nanotube slurry and a preparation method thereof. Ammonium chloride, sodium azide, novolac epoxy resin and carbon nanotubes are added for modification treatment, and the modified carbon nanotubes are obtained. Then, a silane coupling agent KH550, an MXene material, a palmitic acid solution, 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxysuccinimide are added and mixed, and the modified MXene material is obtained. And performing ultrasonic dispersion on polyvinylpyrrolidone, N-methyl pyrrolidone, the modified carbon nanotubes and the modified MXene material to obtain the composite conductive filler. The finished product is obtained by adding the surfactant, the deionized water and the composite conductive filler. The finished product prepared by the method has good conductivity and dispersity, so that the finished product has a wide application prospect in the technical field of carbon nanotube materials.

The invention provides a low-smoke halogen-free flame-retardant cable material and a preparation method thereof, and belongs to the field of cable materials. The low-smoke halogen-free flame-retardant cable material is prepared from the following chemical components: 32 to 40 parts of nitrile rubber, 22 to 27 parts of natural rubber, 8 to 12 parts of benzoxazole-siloxane copolymer containing phosphate dynamic bonds, 13 to 15 parts of core-shell-sheath three-stage structure flame retardant, 4 to 6 parts of hexaphenoxy cyclotriphosphazene modified carbon nanotubes, 2 to 3 parts of europium-doped mesoporous cerium dioxide and 3 to 4 parts of nano zinc oxide. The composite material is prepared from the following components in parts by weight: 3 to 4 parts of carbon nanotube grafted montmorillonite hybrid, 2 to 3 parts of lubricant, 0.8 to 1.2 parts of cross-linking agent, 0.3 to 0.4 part of accelerant, 0.4 to 0.6 part of dicumyl peroxide and 0.1 to 0.2 part of antioxidant. Unification of high flame retardance, low smoke, excellent mechanical property and processability of the cable material is realized.

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

The invention provides a perfluoroether rubber sealing element and a preparation method thereof, and the preparation method comprises the following steps: taking tetrafluoroethylene and perfluoroalkyl vinyl ether as comonomers, and carrying out emulsion polymerization under the condition of a vulcanization point monomer and a chain transfer agent to obtain raw perfluoroether rubber; the preparation method comprises the following steps: mixing the raw perfluoroether rubber, the carboxyl fluorinated modified carbon nanotubes, a filler, a vulcanizing agent and an accelerant, and performing first-stage vulcanization and second-stage vulcanization to obtain the perfluoroether rubber sealing element. According to the perfluoroether rubber sealing element and the preparation method thereof provided by the invention, the compressive deformation resistance of the perfluoroether rubber sealing element is improved by adding the carboxyl fluorinated modified carbon nanotubes, so that the sealing element is ensured to meet the sealing requirement of semiconductor equipment.

The invention discloses a polyvinyl alcohol composite film as well as a preparation method and application thereof in food coloring detection. The polyvinyl alcohol composite film is prepared from raw materials including phenylboronic acid modified carbon dots and polyvinyl alcohol through a thermocuring reaction, a phenylboronic acid group on the surface of the phenylboronic acid modified carbon dot and polyvinyl alcohol form a reversible covalent bond crosslinking point based on boric acid ester so as to form a dynamic three-dimensional network, and the structural formula of the phenylboronic acid modified carbon dot is # imgabs 1 #. The phenylboronic acid modified carbon dot is simple in process, easy to process and form and simple and convenient to use; compared with the prior art, the carbon dots modified by phenylboronic acid groups and the polyvinyl alcohol are added, the crosslinking effect between the carbon dots modified by the phenylboronic acid groups and the polyvinyl alcohol is remarkably enhanced, the mechanical strength and water resistance of the composite film are improved, the food coloring detection capacity of the composite film is improved, and in addition, the composite film further has the characteristic of being capable of being reprocessed, so that the composite film has wide application value.