135results about How to "Solve reunion" patented technology

The invention belongs to but not limited to the technical field of electrode materials, and particularly relates to a high-tap-density lithium nickel manganese oxide positive electrode material, a preparation method and a lithium ion battery, the chemical general formula of the high-tap-density lithium nickel manganese oxide positive electrode material is LiNi < 0.5-x > Mn < 1.5-y > M < x > N < y > O < 4 >, 0.1, 0 < = y < lt >; 0.1, M and N are doping elements and comprise one or more of Mg, Co, Al, Zr, W, Sb, Ta and Ti; the material is micron-sized spherical secondary particles formed by stacking and aggregating nano-sized octahedral primary particles, and is uniformly dispersed without agglomeration; the spherical secondary particles are formed by mixing spherical secondary particles with large and small particle size distribution, and the average particle size range of the large particles is 3lt; d < 50lt >; the average particle size range of the small particles is 1lt; d < 50lt >; 2 [mu] m.

The invention belongs to the technical field of materials, and particularly relates to a modified TB polymer, a preparation method and application of the modified TB polymer in an aluminum alloy surface coating. The prepared modified TB polymer has a structure as shown in a formula I, is used as a flexibilizer component in an aluminum alloy surface coating, can provide a large number of hydrophilic hydroxyl or carboxyl groups which are easily subjected to an activation reaction with a metal surface, and improves the adhesive force of the coating; meanwhile, the group can also improve the dispersity of the filler, so that the coating is more uniform, the stress effect of the coating can be improved, and the coating has better flexibility. In addition, a modified TB polymer is introduced into the coating, so that the prepared coating is green and environment-friendly, excellent in salt fog resistance and chemical corrosion resistance, capable of adapting to a complex marine environment, capable of well protecting metal materials and capable of prolonging the service life of the metal materials. And # imgabs0 # I is adopted.

The invention discloses a composite regulation and control method for improving the performance of a laser additive manufacturing high-strength aluminum alloy, and relates to the technical field of laser additive manufacturing high-strength aluminum alloy materials, micron-sized ceramic particles and micron-sized AlMgScZr alloy powder are mixed, and ceramic particle reinforced aluminum-based composite powder is prepared. According to the composite material powder, the solidification structure is regulated and controlled through the characteristics of ceramic particles, stress concentration is reduced, and meanwhile the reinforcing phase particle aggregation phenomenon is avoided. The obtained composite material is excellent in quality and few in metallurgical defects in laser forming, and the density reaches up to 99.8% or above. By combining the optimized selective laser melting and heat treatment process, the room-temperature mechanical property of the prepared composite material part is remarkably improved, the tensile strength exceeds 540 MPa, the yield strength exceeds 490 MPa, and the elongation at break exceeds 10%.

The invention discloses a continuous automatic micro-nano metal powder production device and method. The continuous automatic micro-nano metal powder production device comprises an ultrasonic atomization system, a high-temperature pyrolysis system, a product collection system and a tail gas treatment system which are sequentially connected. The product collection system comprises a physical separation device and an electrostatic-magnetic field synergistic adsorption device; the electrostatic-magnetic field synergistic adsorption device comprises an electrostatic collection device and a magnetic field adsorption device arranged on the outer side of the electrostatic collection device. The electrostatic collection device comprises a positive electrode electric field arrangement mechanism and a negative electrode electric field arrangement mechanism, and the positive electrode electric field arrangement mechanism is arranged in a cylindrical inner cavity of the negative electrode electric field arrangement mechanism; the positive electric field arrangement mechanism comprises a trunk and a plurality of positive electrode plates distributed in the axial direction of the trunk. Metal powder is collected in a physical separation, high-voltage static electricity and magnetic field cooperation mode, the problems that nanoscale and micron-sized fine powder is prone to leakage and difficult to collect are effectively solved, the powder collection rate is increased, and effective recycling of products is ensured.

The present invention relates to the technical field of power cable manufacturing, and discloses a low-smoke halogen-free flame-retardant polyolefin sheathed power cable. The power cable outer sheath composite material comprises the following raw materials: metallocene linear low-density polyethylene, ethylene-vinyl acetate copolymer, high-density polyethylene, flame-retardant additives, high-temperature resistant components, antioxidants, cross-linking agents, and lubricants; by improving the flame retardant and high-temperature resistant properties of the polyethylene material, the prepared power cable has excellent mechanical properties, toughness, flame retardant properties, and high-temperature resistant properties, can work continuously and stably in a high-temperature environment, reduce the occurrence of fire accidents, and effectively prevent the spread of fire even in the event of a fire, and does not generate toxic hydrogen halide gas and thick smoke during combustion.

The invention mainly relates to the technical field of high-performance ceramic filler nano titanium dioxide, and discloses a preparation method of high-dispersion nano titanium dioxide, which comprises the following steps: slowly dropwise adding a pretreated titanium source into a mixed solvent to prepare a titanium source solution; the preparation method comprises the following steps: adding water and a mixed inhibitor into a reaction kettle, uniformly stirring, slowly dropwise adding the prepared titanium source solution into the reaction kettle, and continuously stirring in the dropwise adding process; cooling the product to room temperature, adding a dispersing agent, aging for a period of time, and slowly adding nano silicon dioxide sol; washing the aged product, and then carrying out vacuum drying treatment; and calcining the dried product at 300-350 DEG C for 1-1.5 hours, then heating to 480-550 DEG C, calcining for 2-2.5 hours, and controlling the heating rate to be 1.5-2 DEG C / min, thereby obtaining the nano titanium dioxide product with uniform granularity and high dispersity after calcining. According to the invention, through optimization of the preparation process, the particle size of the nano titanium dioxide is in a small range, and good particle size uniformity and dispersibility are still kept.

The invention belongs to the technical field of cultural relic protection, and particularly relates to a preparation method of an antibacterial hydrophobic coating for stone cultural relic protection. According to the method, an attapulgite / copper-iron prussian blue analogue / silver nano composite material is synthesized by adopting a simple wet chemical method and an electrochemical replacement method, in the preparation process, natural nano rodlike mineral attapulgite is used as a carrier, and prussian blue analogue nano particles are loaded on the surface of the carrier by adopting an in-situ precipitation method; the antibacterial property of the natural mineral material is effectively improved; furthermore, nano Ag is used for modifying the Prussian blue analogue, so that the killing effect of the composite material on bacteria and fungi can be effectively enhanced, the photo-thermal performance of the Prussian blue analogue can be improved, and the purpose of long-acting bacteriostasis is achieved; and finally, carrying out hydrophobic treatment on the coating by using fluorinated silane to obtain the antibacterial hydrophobic self-cleaning coating for protecting the stone cultural relics.

The invention belongs to the technical field of silicon nitride tape-casting blank waste recycling, and particularly relates to a silicon nitride tape-casting blank waste recycling method, a tape-casting blank and application, the silicon nitride tape-casting blank waste and a liquid medium are mixed according to the mass ratio of 10: (3-4), wet ball milling is conducted for 5-36 h, and slurry is obtained; wherein the particle size of a ball milling medium for wet ball milling is 8-12mm; the slurry is filtered and then subjected to tape casting, and a tape casting blank is obtained; according to the method, recycling of the waste materials can be achieved only by adopting a wet ball milling method, the cost is effectively reduced, the waste material recovery rate can reach 90% or above, the silicon nitride ceramic substrate prepared from the casting blank can meet the use requirement, the utilization efficiency of the silicon nitride casting blank waste materials is effectively improved, and the silicon nitride ceramic substrate has the advantages of being environmentally friendly and free of pollution. And the production cost is reduced.

The invention discloses a preparation method of a high-valence Nb < 5 + > doped H2TiO3 lithium ion sieve, and belongs to the technical field of preparation of inorganic materials. The method is simple and environment-friendly in process, free of organic matters and easy for large-scale production. The unique hollow structure and large specific surface area anatase type TiO2 are adopted as a titanium source, so that the specific surface area, porosity and particle dispersity of the H2TiO3 ion sieve are remarkably improved, adsorption active sites are increased, and the adsorption efficiency and capacity of lithium ions are improved; the structure of the lithium ion sieve is more stable by doping the titanium source with the hollow structure and Nb < 5 + >, and the dissolution loss rate of Ti < 4 + > is reduced. After multiple lithium ion adsorption / desorption cycles, the adsorption capacity of the lithium ion sieve is kept at a high level, and the dissolution loss rate of Ti < 4 + > is extremely low. The ion sieve has high adsorption efficiency, low solution loss rate and good cycle stability, is suitable for the fields of salt lake lithium extraction, lithium-containing wastewater treatment, lithium ion batteries and the like, can significantly improve the extraction efficiency and the battery performance, reduces resource waste and environmental pollution, reduces the production cost, and provides powerful support for technical progress and industrial development in related fields.

The invention relates to the technical field of preparation of silicon carbide ceramics, in particular to an in-situ reaction sintered silicon carbide ceramic and a preparation method thereof.The preparation method comprises the following technological stages which are conducted in sequence: S1, preparation of silicon carbide slurry, specifically, organic matter precursor raw materials are weighed according to the mass content percentage to form the silicon carbide slurry; s2, vacuum grouting: injecting the silicon carbide slurry in the vacuum grouting tank into the shaping mold from the bottom of the shaping mold to form a silicon carbide green body; and S3, in-situ reaction sintering is conducted, specifically, the silicon carbide green body is placed in a sintering furnace, heating, heat preservation and cooling are conducted on the silicon carbide green body in the argon atmosphere through a segmented temperature control technology, and the silicon carbide ceramic is obtained. The silicon carbide ceramic prepared by the method disclosed by the invention has relatively high density and excellent mechanical properties.

The invention discloses a high-efficiency flame-retardant artificial board, a flame retardant and a preparation method thereof. The flame retardant for the artificial board comprises a polyphosphate compound, ammonium borate, boric acid and delignified biomass cellulose in a mass ratio of 5: (3-5): (2-5): (2-4). According to the flame retardant, by means of the synergistic effect of the polyphosphate compound, ammonium borate and boric acid, the carbonization capacity of an artificial board under the high-temperature condition is remarkably enhanced, a compact carbon layer is formed, therefore, heat and oxygen transfer is effectively prevented, and the flame retardant effect is greatly improved. The oxygen index of the prepared environment-friendly efficient flame-retardant artificial board reaches 37% or above, toxic and harmful gas is not released in the combustion process, and the environment-friendly performance is good. The cellulose is used as a carrier of the flame retardant, and the oxidation resistance of the boric acid is combined, so that the mechanical property of the artificial board is improved, the thermal stability of the artificial board is improved, and the good balance of the flame retardant property and the mechanical property is realized.

The invention provides a preparation method of a chopped carbon fiber reinforced ceramic-based crucible material, and relates to the technical field of chopped carbon fiber reinforced ceramic-based crucible materials.The preparation method comprises the following steps that S1, chopped carbon fibers and ceramic matrix powder are subjected to dry mixing according to a preset proportion, and the chopped carbon fibers are preliminarily and evenly distributed in the ceramic matrix powder; s2, the carbon fibers obtained after dry mixing and ceramic matrix powder are mixed through a wet method, ball milling or homogenizing treatment is carried out in a liquid medium, the carbon fibers and the ceramic matrix powder are fully dispersed, and mixed slurry is obtained.According to the preparation method, oxidation treatment or acid pickling treatment or a metal coating technology is carried out on the surfaces of the short carbon fibers; according to the invention, the carbon fibers are added into the ceramic matrix, so that the interface bonding force between the carbon fibers and the ceramic matrix is obviously improved, the carbon fibers are uniformly dispersed in the ceramic matrix, the agglomeration problem of the carbon fibers is avoided, and the mechanical properties, including compressive strength, bending strength and thermal shock resistance, of the material are enhanced.

The invention belongs to the technical field of antibacterial materials, and particularly relates to a nano composite antibacterial agent for in-situ growth of a silver ion modified Prussian blue analogue on attapulgite as well as a preparation method and application of the nano composite antibacterial agent. According to the method, the attapulgite-silver ion modified prussian blue analogue nano composite antibacterial agent is synthesized by adopting a simple wet chemical method and an electrochemical replacement method, in the preparation process, natural nano rod-like mineral attapulgite is used as a carrier, and nano particle prussian blue and the nano rod-like attapulgite are combined by adopting an in-situ precipitation method; the antibacterial property of the natural mineral material is effectively improved; furthermore, the composite material is modified through silver nitrate by using an electrochemical replacement method, so that the killing effect of the composite material on bacteria and fungi can be effectively enhanced, and the purpose of long-acting bacteriostasis is achieved.

The invention relates to the technical field of insulator iron cap production, in particular to an insulator iron cap and a preparation method thereof.The preparation method comprises the steps that after a steel ladle is preheated, a part of spheroidizing agent and a part of nucleating agent are laid at the bottom of the steel ladle, and a TiC-SiC-Fe reinforcing material plate is laid at the top of the spheroidizing agent and the top of the nucleating agent; the remaining spheroidizing agent and nucleating agent are subjected to core wrapping with aluminum, and an aluminum core-spun yarn is obtained; the molten iron liquid is injected into a steel ladle, dross is skimmed after a reaction, then an aluminum core-spun yarn is fed into the steel ladle, the reaction is continued, dross is skimmed again after the reaction is finished, and enhanced molten iron is obtained; pouring enhanced molten iron into the mold, and carrying out solidification, cooling, demolding and fine finishing to obtain an intermediate casting; and carrying out hot-dip galvanizing treatment on the intermediate casting, and plating a corrosion-resistant zinc layer to obtain the insulator iron cap. The TiC-SiC-Fe reinforced material plate is used for refining grains, the nodulizing agent and the nucleating agent are added in batches, and the corrosion-resistant zinc layer is plated, so that the prepared insulator iron cap has excellent mechanical strength and corrosion resistance.

The invention relates to the technical field of high polymer materials, and discloses an antibacterial modified nano SiO2 grafted polystyrene composite material, styrene and an allyl amide imidazole monomer are used as polymerization monomers, imidazole-based polystyrene with a molecular side chain containing an imidazole functional group is obtained through polymerization, bromine atoms and tertiary amine of imidazole are subjected to a quaternization reaction, and the antibacterial modified nano SiO2 grafted polystyrene composite material is obtained. According to the preparation method, alkyl bromide modified SiO2 and imidazolyl polystyrene are subjected to quaternization reaction, so that long-chain alkyl imidazole quaternary ammonium salt is generated between the alkyl bromide modified SiO2 and imidazolyl polystyrene, polystyrene and nano SiO2 are organically combined through imidazole quaternary ammonium salt ionic bonds, the compatibility between polystyrene and nano SiO2 is improved, the problem of agglomeration of nano SiO2 is effectively solved, and the reinforcing effect of nano SiO2 can be better exerted; and the long-chain alkyl imidazole quaternary ammonium salt between the nano SiO2 and the polystyrene has excellent antibacterial property, so that the polystyrene material is endowed with excellent antibacterial property.

The invention relates to the field of cookware materials, and provides a cookware wear-resistant material and a preparation method thereof, and the material comprises the following components: a surface modified dumbbell-shaped silicon carbide filler, a porous silicon dioxide coated silver filler, polytetrafluoroethylene, methyl phenyl silicone resin, an antioxidant 1010 and deionized water. The dumbbell-shaped silicon carbide is prepared by ball milling, spray drying, sintering and hydrochloric acid treatment and then is modified by 3-aminopropyltriethoxysilane. The porous silicon dioxide coated silver filler is prepared by taking polystyrene latex as a template, preparing porous silicon dioxide through a sol-gel method and then reacting silver nitrate with ascorbic acid. The preparation method comprises the steps of dispersing, mixing, coating and curing, the obtained material has excellent wear resistance and antibacterial property and can be widely applied to cookware surface coatings, and the problems that a traditional cookware material is low in wear resistance and poor in antibacterial property are solved.

This invention relates to the field of thermal insulation materials, specifically to an inorganic silicon crystal fire-resistant thermal insulation material for fireproof air ducts and its preparation method. The material comprises inorganic silicon crystal powder, hollow microspheres, composite binders, reinforcing fibers, surface modifiers, nano-antibacterial agents, crack-resistant agents, flame-retardant synergists, and intumescent flame-retardant microcapsules. The inorganic silicon crystal powder is activated by calcination, the microspheres are pretreated with coupling agents and coated with silica sol, the binder is a compound type, the fibers are grafted, the antibacterial agent is loaded onto a carrier, and the flame-retardant microcapsules have a specific core and shell. All components work synergistically to ensure performance. This invention improves the material's fire resistance, thermal insulation, and mechanical properties, integrates antibacterial and flame-retardant functions, optimizes the process to ensure stable performance, reduces fire risk, and meets the high-performance and high-stability requirements of high-end building fireproof air ducts.

This application relates to the field of insulating materials, specifically disclosing a flexural insulating material, its preparation method, and a robot cable, comprising the following raw materials in parts by weight: 50-80 parts of low-density polyethylene, 30-40 parts of medium-density polyethylene, 30-40 parts of ethylene-tetrafluoroethylene-perfluoropropyl vinyl ether terpolymer, 1-20 parts of filler, 3-8 parts of compatibilizer, 0.1-5 parts of crosslinking agent, and 0.1-5 parts of co-crosslinking agent. This invention addresses the performance shortcomings of existing insulating materials, achieving a balance of flexural resistance, abrasion resistance, insulation stability, and excellent flexibility, thus meeting the stringent requirements of high-frequency cables used in robots / manipulators.

This invention discloses a method for preparing interface-reinforced niobium pentoxide / porous graphene and its energy storage application. The method involves adding porous graphene oxide during the solvothermal synthesis of a niobium pentoxide precursor to obtain a composite precursor of niobium pentoxide and porous graphene oxide. This precursor is then annealed under a protective atmosphere to obtain the interface-reinforced niobium pentoxide / porous graphene composite material. The composite material obtained by this invention exhibits excellent performance as an electrochemical energy storage material. Furthermore, the preparation method of this invention is simple to operate, requires no complex equipment, and is easily controlled, making it suitable for mass production.

This invention discloses a dual-mode synergistic composite photocatalyst, its preparation method, and its application in styrene-acrylic emulsion coating compositions, belonging to the field of architectural coating technology. The dual-mode synergistic composite photocatalyst possesses a TiO2@dense SiO2@mesoporous SiO2-MnO2-GQDs three-layer core-shell structure. The styrene-acrylic emulsion coating provided by this invention utilizes the aforementioned dual-mode synergistic composite photocatalyst, and innovatively employs a yellowing-resistant composition composed of hollow titanium dioxide-supported phenyltriazole particles, a sulfonic acid-grafted hindered amine light stabilizer, and nano-zinc oxide. This composition synergistically inhibits yellowing of the paint film through enhanced UV absorption and improved interfacial compatibility. The styrene-acrylic emulsion coating provided by this invention successfully solves the two major problems of traditional photocatalytic coatings: "purification depends on light" and "self-catalysis leads to yellowing of the paint film." It can efficiently degrade formaldehyde under both light and dark conditions and exhibits excellent yellowing resistance.

The application discloses an organic amine modified HMS molecular sieve and application thereof in carbon dioxide capture, and specifically relates to the following steps: first, preparing mesoporous molecular sieve HMS, which contains two kinds of pore structures, 4.5-8.0 nm and 11.5-17.5 nm respectively, and a single wide diffraction peak is presented at 2theta=2.6 degrees in X-ray powder diffraction; then, grafting amino silane on the surface of the mesoporous molecular sieve HMS; and finally, immersing the mesoporous molecular sieve HMS in an organic amine solution to obtain a multilevel organic amine modified HMS molecular sieve. The synthesis method is simple, the carbon dioxide adsorption efficiency is high, and the thermal stability is good.

The application provides a kind of hydrophilic tubular membrane, including support layer and separation layer successively from inside to outside;The pore size of the support layer is 0.5-1.5 μm, the pore size of the separation layer is 30-80 μm, and the support layer and the separation layer are diffused and intertwined at the interface, forming a continuous gradient structure without obvious interface.The separation layer contains modified nanosilica by silane coupling agent.The application effectively reduces the mass transfer resistance by gradient structure, significantly improves the hydrophilicity and anti-pollution performance of the membrane surface by using modified nanosilica, and has strong interlayer bonding strength, which is suitable for high-pollution industrial wastewater treatment and other fields.

The invention discloses a lithium battery solid electrolyte and a production process thereof, and relates to the technical field of solid lithium batteries. The preparation method comprises the following steps: firstly, carrying out condensation reaction on carboxymethyl nano cellulose and amino silane, and grafting terminal alkynyl of oxalate to prepare high-conductivity cellulose; then fluorine ions are doped with graphene oxide quantum dots, and the fluorine-doped graphene oxide quantum dots are combined on the high-conductivity cellulose through functional groups, so that the transmission capability of Li < + > on an interface is effectively improved, local Li < + > aggregation and lithium deposition current are reduced, and the stability of the electrolyte is improved. Secondly, crosslinking a pyrrole monomer with the hybridized high-conductivity cellulose, and then carrying out in-situ polymerization, so that the hybridized high-conductivity cellulose and pyrrole are staggered to form a nano net-shaped structure; then polypyrrole and polyvinylidene fluoride are blended and combined by utilizing hydrogen bond acting force to prepare the composite solid electrolyte membrane, and the composite solid electrolyte membrane has the advantages of both polypyrrole and polyvinylidene fluoride, so that the electrolyte membrane is stable and has high conductivity. The electrolyte prepared by the invention has the effects of ionic conductivity and high stability.

The invention provides a method for constructing high-performance GWamp by using a hybrid heterogeneous fiber filler. The invention discloses a CF-coated PEEK composite material and a preparation method thereof. According to the invention, the high-performance GWamp is constructed by the hybrid heterogeneous fiber filler; a preparation method of the CF-coated PEEK composite material comprises the following steps: carrying out heat treatment on carbon fibers, adding the carbon fibers subjected to heat treatment into a solution containing nickel sulfate, nickel chloride, boric acid and lauryl sodium sulfate, and carrying out nickel plating to obtain nickel-plated carbon fibers; nickel-plated carbon fibers are added into a benzoxazine / acetone solution, then graphene and carbon nanotubes are added and stirred, and finally the nickel-plated carbon fibers are transferred to a drying oven to be subjected to thermocuring after a slightly wet state is obtained through vacuum filtration; curing to obtain a hybrid filler; mixing the hybrid filler and polyether-ether-ketone, and carrying out hot compression molding to obtain GWamp; the invention relates to a CF-coated PEEK composite material. According to the invention, the agglomeration problem of the nanofiller in the polymer is solved, the problems of insufficient thermal conductivity and electrical conductivity of the carbon fiber are improved, and the high-cost-performance material with excellent thermal conductivity, electrical conductivity, EMI shielding, electric heating, mechanical properties and the like is prepared.

The invention discloses a preparation method of a carbon cage-in-cage / carbon coated nickel composite material with infrared stealth performance, an obtained product and application. The preparation method comprises the following steps: preparing nickel microspheres; roasting the nickel microspheres and urea in an inert atmosphere to obtain an NC / Ni composite material; and the NC / Ni composite material is placed in diluted hydrochloric acid for acid etching, and the cage-in-cage / carbon-coated nickel composite material is obtained. The obtained composite material is of a carbon-coated nickel modified carbon micron cage-coated nano cage structure, the process is simple, the cage-in-cage structure of the carbon cage can be accurately controlled, the defect that nickel elementary substances are easy to agglomerate is effectively overcome, and the composite material has good conductivity, electromagnetic wave absorption performance and low infrared emissivity and can be applied to the field of electrochemistry. Wide application values are realized in the fields of infrared stealth, electromagnetic wave absorption and the like.

This utility model discloses a mixing device for raw materials in the production of methyl cedarwood ether, including a mixing tank, a discharge port installed at the bottom of the mixing tank, and a support frame installed outside the mixing tank. It also includes a mounting plate fixedly connected to the outside of the mixing tank, a storage tank for storing raw materials installed on top of the mounting plate, a conveying assembly installed on the mixing tank, and a mixing assembly installed inside the mixing tank. The conveying assembly transports the raw materials from the storage tank into the mixing tank, and the mixing assembly mixes the incoming raw materials. By storing materials in multiple storage tanks for different categories, and coordinating with a conveying pump to synchronously transport raw materials according to a preset ratio with a conveying accuracy of ±1%, the proportions strictly meet production requirements. Simultaneously, the first spiral blade inside the conveying cylinder achieves synchronous pre-mixing, avoiding the problem of intervals in multiple feedings. Local concentration fluctuations of the raw materials are controlled within 5%, significantly reducing the occurrence of side reactions, and increasing the purity of the methyl cedarwood ether product to over 98%.

The invention relates to the technical field of electrical insulating materials for power transmission lines, and discloses a low-temperature-toughness durable high-hydrophobicity epoxy resin hybrid insulating material and a preparation method thereof. Comprising 50-100 parts of an epoxy monomer, 5-50 parts of a siloxane-based epoxy monomer, 30-80 parts of a curing agent, 8-20 parts of a polysiloxane modifier, 10-30 parts of a composite filler, 1-10 parts of an acid-base accelerator, 80-160 parts of aluminum hydroxide, 80-120 parts of silicon powder and 5-25 parts of a silane coupling agent. A chemical network structure on a molecular level is designed, a siloxane epoxy monomer with excellent low-temperature mechanical toughness and high hydrophobicity is introduced, a polysiloxane chain segment is subjected to modification treatment and chemically crosslinked with a functional group of a curing agent, the problem of interfacial compatibility is solved, a composite filler capable of improving compatibility is added, and the curing agent is prepared. According to a free radical reaction mechanism, the surface of the formed insulating material is subjected to rapid fluorination treatment, and the epoxy resin-based hybrid insulating material is endowed with mechanical toughness and lasting hydrophobic performance in a low-temperature environment.

The invention discloses nanometer graphene oxide and a preparation method thereof. The transverse size of the nanometer graphene oxide is 10-100 nm, and the thickness of the nanometer graphene oxide is 1-2.5 nm. The surface chemical structure meets the following conditions: a C1s peak is analyzed on the basis of X-ray photoelectron spectroscopy, the sum of the atomic percent content of hydroxyl and epoxy groups is not higher than 15%, and the atomic percent content of carboxyl is not lower than 6%. According to the structural design, the structural defect caused by excessive oxidation or reduction in a traditional method is avoided, and the chemical stability and the functionalization potential of the material are improved.

This invention discloses an organosilicon-modified acrylic resin coating, its preparation method, and its application, belonging to the field of surface protection technology. The organosilicon-modified acrylic resin coating of this invention comprises the following raw materials in parts by weight: 92-99 parts of organosilicon-modified acrylic resin and 1-8 parts of modified SiO2@FGO nano-hybrids. This invention achieves surface modification of graphene oxide using a silane coupling agent, and further obtains the coating through in-situ hydrolysis deposition and modification of SiO2 nanoparticles. The organosilicon-modified acrylic resin coating with composite nanofiller exhibits excellent resistance to chloride ion corrosion, carbonization, alkali resistance, weather resistance, and adhesion, and can be used for surface protection of marine reinforced concrete engineering projects.

The invention provides a catalyst for a high-performance proton exchange membrane fuel cell, the catalyst is a pomegranate-structured Pt particle catalyst, and pomegranate-structured Pt particles (PG Pt) are prepared by a water electrolysis method. On the premise that the mechanical strength is not reduced and the dispersion difficulty is not increased, the catalyst material of a pomegranate structure is provided, on the basis that the characteristic that the specific surface area of a granular catalyst is large is reserved, the catalytic efficiency is improved through the surface effect among a plurality of small particles, meanwhile, the Ostwald curing process is inhibited, and the stability is improved.