45results about How to "Promote decentralization" patented technology

The invention relates to a method for preparing siloxane-modified thermoplastic material, which comprises the following steps: adding 100 weight parts of thermoplastic resin, 40-80 parts of high molecular weight siloxane, 20-40 parts of silicon resin, and 5-10 parts of compatibilizer into a blender, blending for 3-4min, then adding 10-25 weight parts of cross-linking agent and 0.01 -0.5 parts of hydrosilation catalyst, reacting and blending for 3-5min, discharging, cooling to the room temperature and obtaining a base stock; taking 100 weight parts of the base stock in the step one and 50-150 weight parts of thermoplastic resin for mixing uniformly, blending through an internal mixer or a double screw extruder and obtaining the siloxane-modified thermoplastic material. The cross-linking siloxane-modified thermoplastic material made by the invention has the advantages of higher heat resistance, excellent weather resistance, lower friction factor changing along with time, smooth surface, silk touch feeling and the like.

The invention discloses a method for preparing a polymer/inorganic nano particle composite material. The method is characterized by comprising the following steps: after mixing and pelleting a polymer and an inorganic nano particle according to a certain ratio, conveying aggregates through an extruder in a bidirectional stretching melt mixing and forming integrated device, preparing aggregates or a sheet through plasticizing and melting and under a bidirectional stretching-shearing acting force of a bidirectional stretching melt mixer, wherein the aggregates or the sheet is better in inorganic nano particle dispersing property, and excellent in performance. The polymer/inorganic nano particle composite material overcomes the defects of difficulty in dispersing and poor compatibility of the inorganic nano particle in a polymer melt; and the polymer/inorganic nano particle composite material has better mechanical property, barrier property, heat stability performance, and conductive property. The method is simple and easy to operate, simple in equipment, and convenient to produce in large scales.

The invention relates to a rubber piezoceramics damping vibration attenuation material and a preparation method thereof. In virtue of the combination of the elasticity of the rubber and the piezoelectric property of the piezoceramics, the rubber piezoceramics composite material is prepared by the method of rubber processing and polarizing. The method leads to the uniform dispersion of the piezoceramics in the rubber, properly solves the problem of interface combination between the piezoceramics and the rubber, and obtains the composite material that is characterized by compact structure, uniform dispersion and good sound-absorption performance.

The present invention discloses a glycidyl ether blocking long-chain polyether silane coupling agent, with the following general formula: (CH3)aSiX3-aCH2CH2CH2O(CH2CH2O)n(CH2CH(CH3)O)mCH2CH(O)CH2, in which n, m is 1-50 integer, X is Cl, -OCH3 or -OCH2CH3, and a is 0, 1, 2 or 3. The present invention provides the long-chain polyether silane coupling agent with glycidyl ether blocking. The glycidyl ether on its terminal which can react with the matrixes such as epoxy resin, polyurethane, etc., promotes the compatibility of nano-SiO2 with organic matrixes, and its polyether chain which can activate the encapsulation and surface of nano-SiO2, promotes the dispersion of nano-SiO2 in organic matrixes. Therefore, it largely increases the dispersion and stability of the nano-SiO2 in organic solvent, especially in organic polymer matrixes, such as epoxy resin and polyurethane.

The invention relates to a highly weather-resistant aesthetic resin. The highly weather-resistant aesthetic resin is prepared from the following components in parts by weight: 100 parts of a matrix resin, 0.1-5 parts of effect pigments, 1-10 parts of a weather-resistant modifier, 0.3-2.0 parts of a lubricating agent and 0.1-1.0 part of an antioxidant. The invention also provides a method for preparing the highly weather-resistant aesthetic resin. The invention has the advantages that the aesthetic resin prepared by the invention has excellent appearance, does not have any flow trace or weld line during injection molding, overcomes the defect in the prior art that the aesthetic resin is insufficient in weather resistance, greatly widens the application field and range of replacing spray with the aesthetic resin, really realizes a green, energy-saving and environmental-friendly spraying-free solution, and can be widely applied to the fields with particularly high weather resistance requirements, such as automobiles, household appliances, consumer electronics and the like.

The invention discloses a high-thermal-conductivity gel composition with excellent weather resistance. The high-thermal-conductivity gel composition comprises 100 parts of vinyl silicone oil, 5-20 parts of a cross-linking agent, 0-10 parts of a chain extender, 0.1-1 part of an inhibitor, 0.05-1 part of a catalyst, 2-10 parts of a coupling agent and 2000-3000 parts of thermal conductive powder. According to the invention, spherical heat-conducting powder with different particle sizes are compounded to endow heat-conducting gel with high heat conductivity; the cross-linking agent and the chain extender are matched for use to endow the heat-conducting gel with cross-linking density, and angular heat-conducting powder is added into the spherical heat-conducting powder, so that the sliding andcracking phenomena of the heat-conducting gel under high and low temperature impact are greatly improved while the heat conductivity coefficient is increased, the heat-conducting gel is endowed with excellent weather resistance, and the aging reliability and product competitiveness of the heat-conducting gel are improved.

The invention provides a glass fiber reinforced poly(ether-ether-ketone) 3D printing consumptive material and a preparation method thereof, wherein the glass fiber reinforced poly(ether-ether-ketone) 3D printing consumptive material is formed by mixing long glass fiber (GL), a poly(ether-ether-ketone) (PEEK) resin viscosity modifier, and a PEEK resin. The preparation method comprises: raw material drying, melting extrusion, cooling, traction, and winding. According to the present invention, by adding the PEEK resin viscosity modifier to the PEEK, the viscosity of the PEEK matrix resin can be effectively reduced so as to be suitable for the processing of the 3D consumptive material; the PEEK resin viscosity modifier is formed from the polyetherketoneketone liquid crystal polymer having the structure similar to the poly(ether-ether-ketone), such that the compatibility with the poly(ether-ether-ketone) matrix resin is solved due to the similar structure; and the PEEK is the special engineering plastic, and can be combined with the 3D printing molding method, such that the obtained material can be used for preparing the complex functional member so as to expand the material application field.

The invention relates to a catalyst for synthesizing gas light hydrocarbon and a preparation method of the catalyst. The problems that in the prior art, gas light hydrocarbon synthesizing reaction is strong-heat-release reaction, when a fixed bed is used, reaction heat removal is difficult, temperature runaway is prone to happening, and inactivation is prone to happening by means of the catalyst, and when a fluidized bed is used, product is not concentrated enough during distribution, and low-carbon olefin selectivity is low are mainly solved. Through the technical scheme that synthesized gas as the raw material makes contact with the iron-base fluidized bed catalyst, with the composition of chemical formula of Fe100KaZnbMncLadOx as the active component according to the atomic ratio, in a fluidized bed with alumina as the carrier to react and generate light hydrocarbon, the problems are well solved, and the catalyst can be used for industrial production of synthesizing gas light hydrocarbon in the fluidized bed.

The invention discloses a high-efficiency preparation method of lithium ion battery slurry. The high-efficiency preparation method of positive electrode slurry and negative electrode slurry of a lithium ion battery comprises: dry-mixing active materials, a binder and a conductive agent, gradually adding the dry mixed powder into a solvent in a stirring state through an oscillation method, and carrying out stirring under the conditions of a certain temperature, revolution and high-speed dispersion without vacuuming conditions to obtain slurry for coating. Through the preparation method, powderis uniformly and rapidly wetted so that stirring time is significantly shortened to only 1h, the production efficiency is significantly improved, the equipment energy consumption and equipment dependency are reduced and the labor cost is saved. The slurry has good consistency and stability. The prepared battery has good electrochemical performances. The method has high efficiency and is especiallysuitable for mass production.

The invention discloses a conductive polypropylene nano composite material comprising polypropylene, a conductive agent, a compatibilizer, a dispersant, a heat stabilizer and a processing aid, whereinthe conductive agent consists of compositions at least containing a first conductive component, the first conductive component is a metal-organic framework material MOFs, a metal ligand of the material is aluminum, and an organic ligand of the material is a polycarboxy aromatic compound. According to the conductive polypropylene nano composite material, the MOFs having the specific metal center and organic ligand as the first conductive component is added into the polypropylene material, carbon nanotubes, graphene, carbon fibers, conductive metal powder and the like are added as a second conductive component, a sulfobetaine having a specific structure is used as a dispersing agent for cooperation, and maleic anhydride grafted polypropylene having a specific grafting ratio is used as a compatibilizing agent to enhance the dispersion of the conductive agent in a resin matrix, and through the synergistic effect of the components, the polypropylene composite material has better conductivity.

The invention discloses a formula of an impact-resistant PVC (Polyvinyl Chloride) tubular product. The formula comprises the following components in parts by weight: 25-40 parts of ASA (Acrylonitrile Styrene Acrylate copolymer) resin, 3-5 parts of a lubricant, 5-10 parts of PE (Polyethylene) wax, 4-8 parts of ultrathin light calcium carbonate, 3-6 parts of a flame retardant, 5-10 parts of titanium pigment, 7-12 parts of titanium dioxide and 3-5 parts of magnesium hydroxide. The formula is further optimized, so that the dispersion of inorganic filler is accelerated in the processing process of the PVC tubular product to improve the fluidity of the PVC melt, the tensile strength and the breaking elongation can be further enhanced, and the deficiency that a polyethylene product is good in toughness and low in hardness when chlorinated polyethylene is used is solved.

A sintering-resisting loading type nanometer palladium catalyst and a preparing method and application thereof relate to a nanometer metal catalyst. The sintering-resisting loading type nanometer palladium catalyst contains active component acetylacetone palladium and carrier SiO2, and metal Pd occupies 0.5-5.0% of the sintering-resisting loading type nanometer palladium catalyst according to mass percent. The preparing method of the sintering-resisting loading type nanometer palladium catalyst includes steps: (1) SiO2 is selected to serve as the carrier, immersed into nitric acid solution and washed until the pH of SiO2 is 6.5-7.0, and then is dried; (2) Pd (acac) 2 compound is dissolved in acetylacetone or toluene solvents to prepare Pd (acac) 2 solution with mass concentration of Pd to be 0.26-1.04 mg/ml; (3) SiO2 obtained in the step (1) is immersed into the metal salt solution obtained in the step (2), and an initial catalyst is obtained after drying and roasting; and (4) the initial catalyst obtained in the step (3) is subjected to hydrogen gas reduction, and the sintering-resisting loading type nanometer palladium catalyst is finally obtained.

The invention discloses a high-impact PVC (polyvinyl chloride)/ABS (poly(acrylonitrile butadiene styrene)) tubing and a preparation method thereof. The tubing is prepared from a material A and a material B by steps of proportionally mixing, extruding and granulating. Since a formula is optimized further, dispersing of organic packing can be improved during processing of the PVC tubing, fluidity of PVC melt can be improved, tensile strength and elongation at break can be improved, and the defect of good ductility but low hardness of polyethylene products produced by the aid of chlorinated polyethylene is overcome. In addition, since components such as impact modifiers ACR, ACM (poly(acrylic acid ester rubber)), MBS (methacrylate butadiene styrene) and ABS resin are utilized in the formula, cold bending performance and impact resistance of the tubing produced according to the formula are improved.

The invention relates to an extraction device in magnetic mixing dispersion system adopting acidity hydrophobic ionic liquid with magnetic function as extractant. There is a reaction tank, of which the bottom middle part is concave. In the concave groove there is a vertical round Nd-Fe-B permanent magnet connected with the shaft of rotary motor. The outlet port for magnetic ionic liquid is set on the wall at one side of lower part of reaction tank. The inlet port for magnetic ionic liquid and inlet port for substance liquid are set on the wall at the other side. Magnetically stabilized bed coil is set on the outer side wall of upper part of reaction tank. Liquid inlet port of a ring dispersion device is docked with the port for substance liquid in the reaction tank. The magnetically stabilized bed coil controls mutual impact and condensation of magnetic ionic liquid pearls with dispersion phase. The extraction device realizes two operation states of one tower. Water solution in magnetic ionic liquid phase is in dispersion phase and ionic liquid in water solution phase is in dispersion phase. So entrainment phenomena are decreased. The device power is far lower than normal mixing device and energy consumption in extraction process is decreased.

The invention discloses a polyvinyl chloride (PVC) tube containing modified tree ash and a preparing method thereof. The PVC tube containing the modified tree ash comprises compositions of, by weight part ratio, 57-63 parts of SG-5 type PVC resin, 37-43 parts of polymethacrylate, 1.5-2 parts of poly-4-methyl-1-pentene, 1-3 parts of impact modifier ACR, 1.5-2 parts of Span60, 1.2-1.4 parts of calcium-zinc stabilizer, 1-3 parts of modified tree ash, 33-38 parts of superfine talcum powder, 0.6-0.8 part of resorcinol, 0.3-0.5 part of methacrylic acid emulsification, 1-3 parts of carbon black and 2-4 parts of silane coupling agent KH550. According to the PVC tube containing the modified tree ash and the preparing method thereof, a formulation is further optimized, the modified tree ash is added in the formulation, and therefore dispersion of inorganic fillers is promoted and fluidity of PVC fusant is improved during the manufacturing process of the PVC tube, and furthermore tensile strength and breaking elongation are improved, toughness is good and hardness is low. In addition, the preparing method is simple and effectively applied to every walk of life.

The invention discloses an intelligent electro-hydraulic lifting control device for a paddy field agricultural machine. The intelligent electro-hydraulic lifting control device comprises a detection module, a control module and an execution module. The control module makes an action judgment according to agricultural machine information acquired by the detection module and sends a signal. The execution module controls automatic lifting, lowering and leveling of agricultural implements. The detection module comprises an automatic driving controller, a wheel speed sensor, a body tilt angle sensor and a leveling cylinder displacement sensor. The control module comprises an electro-hydraulic lifting controller. The execution module comprises an electro-hydraulic lifting control valve, a pump,a hydraulic cylinder and a three-point suspension, and is used for executing instructions sent by the control module to control movement of the agricultural implements. The agricultural machine information includes a straight travelling signal, a turning and reversing signal and an agricultural implement leveling signal. The invention further discloses an intelligent electro-hydraulic lifting control method for the paddy field agricultural machine. Straight travelling of the paddy field agricultural machine, the tilling depth of the agricultural implements during turning and reversing, and automatic leveling of the agricultural implements in a paddy field can be controlled.

The invention relates to a method for preparing high-content natural lutein ester rapidly. Natural lutein ester crystals are prepared by using solvents with different properties to form a ternary solvent system, taking marigold ointment with the lutein ester content being 20 to 40 percent as a raw material and washing and filtering under the relative pressure of 0 to 1 Mpa. The lutein ester prepared by the method has high flowability and is loose crystals, and the crystal powder after drying is orange and bright. The process is simple, the washing efficiency is high, extremely short time is consumed, the obtained lutein ester has high purity, the used solvents can be recycled, and the method is suitable for large-scale industrial production.

The invention discloses a high-voltage cable stabilizer and a preparation method thereof. A vinyl aromatic ketone compound and inorganic nanoparticles are subjected to a coupling reaction to prepare inorganic nanoparticles modified by a coated silane coupling agent and a grafted voltage stabilizer vinyl aromatic ketone compound, and the voltage stabilizer is used as a surface modifier and interacts with the modified nanoparticles through Van der Waals' force or chemical bonds. The dispersion of the nanoparticles is enhanced, the migration and precipitation of the voltage stabilizer are inhibited, the synergistic effect of the voltage stabilizer and the nanoparticles is obtained, the breakdown characteristic, the conductivity characteristic and the space charge characteristic of the polymerinsulating material are improved, and the capacity of the polymer insulating material for inhibiting electric branches and water branches is enhanced.

The invention provides paint and a preparation method thereof and belongs to the technical field of paint preparation. The paint is prepared from raw materials in parts by weight as follows: natural resin, synthesized resin, pigments, filler, a solvent and an additive, wherein the filler is a mixture of diatomite or titanium dioxide with the size smaller than 100 nm, tourmaline and zinc oxide nanopowder, and the additive is a formaldehyde scavenging agent. The method comprises steps as follows: (1) the natural resin and the synthesized resin are mixed with the solvent, and a mixed solution is obtained; (2) the pigments and the filler are added to the mixed solution and stirred with a blender, and a mixture is obtained; (3) the additive is added to the mixture, the mixture is vacuumized and then stirred continuously, and the required paint is obtained. The preparation process of the paint is simple, and the paint has the functions of removing formaldehyde volatilizing from paint and plates and improving the air quality and is low in preparation cost. The paint is prepared from the resin serving as a base material, the pigments and the filler through dispersion and coupling treatment, namely, through mechanical stirring.

The invention discloses a park grade thermosetting negative ion powdery paint, which comprises the following raw materials in parts by weight: 50 to 62 parts of polyester resin with terminal carboxyl groups, 3 to 5 parts of hydroxyalkyl amide curing agent, 7 to 8 parts of negative ion additive, 0.2 to 0.5 part of dispersant, 0.7 to 1 part of levelling agent, 0.3 to 0.5 part of degassing agent, and 25 to 35 parts of filler and pigment. The invention also relates to a preparation method and applications of the provided paint. The paint has the basic functions of powdery paint, also has the function of releasing park grade negative ions in a long term, and thus has a vast market application prospect.

The invention discloses a fibrous filler modified polycarbonate composite and a preparation method thereof. The composite comprises first polycarbonate, second polycarbonate, a fibrous filler and a dispersing agent. The specific dispersing agent and the second polycarbonate are used in a conventional fibrous filler modified polycarbonate system in a matched manner; by utilizing the dispersing agent of which one molecular chain contains two different types of functional groups at the same time, the interface action and dispersion of the filler in the material can be controlled, so that the rigidity and toughness of the material are further improved at the same time; by utilizing the branched polycarbonate with specific branching degree, the dispersion of the fibrous filler in the resin canbe improved, and the processing fluidity of the composite can also be improved, so that the composite has higher melt index and is particularly suitable for preparing thin-wall products.

The invention relates to a catalyst for preparation of acetaldehyde through hydrogenation, and a preparation method and application thereof. The catalyst comprises an active metal, an auxiliary active component, a protective agent and a carrier in a mass ratio of (2-30): (1-20): (0.1-10): 100. Compared with the prior art, the catalyst provided by the invention is a non-noble metal catalyst which is good in activity and heat stability, low in cost, easy to reproduce and convenient for scale-up production and has been applied in the industry.

The invention discloses a wear-resistant and oil-resistant engineering sole material and a preparation method thereof. The wear-resistant and oil-resistant engineering sole material comprises, by weight, 40-70 parts of ethylene-vinyl acetate copolymer, 30-60 parts of synthetic rubber, 4.5-10.5 parts of nano filler, 18-45 parts of reinforcing agent, 5-15.5 parts of coupling agent, 1.4-3.4 parts ofcrosslinking agent, 2-5.5 parts of zinc oxide, 0.8-2.3 parts of stearic acid, 1-2.5 parts of zinc stearate, 4-11 parts of naphthenic oil and 0.5-2.2 parts of anti-aging agent. The wear-resistant and oil-resistant engineering sole material has the advantages that the oil-resistant mass change rate of the sole material reaches 5.1-8.8%, the volume change rate of the sole material reaches 9.1-11.8%,the DIN abrasion volume of the sole material reaches 54-82mm<3>, and the volume resistivity of the sole material reaches 10<6>-10<8> ohm*m; meanwhile, the sole material is excellent in mechanical performance, good in elasticity, good in damping performance and suitable for being used for producing soles used in working environments such as oil fields and kitchens.

The invention relates to a heavy hydrocarbon Fischer-Tropsch synthesis catalyst and a preparation method thereof. Since a Fischer-Tropsch synthesis reaction is a strong exothermic reaction, when a fixed bed is used, reaction heat is difficult to remove, temperature runaway is easily caused and a catalyst is easily inactivated and when a fluidized bed is used, selectivity of heavy hydrocarbon (hydrocarbons containing more than five carbon atoms) is low. By adoption fo the heavy hydrocarbon Fischer-Tropsch synthesis catalyst and the preparation method thereof, provided by the invention, all the problems in the prior art can be solved. According to the technical scheme, an iron-based fluidized bed catalyst is adopted, wherein at least one of Si and Al oxides is taken as a carrier of the catalyst and the active component of the catalyst contains a composition with the following chemical formula in atomic ratio: Fe100AaMnbCrcOx; and synthetic gas serving as raw material comes into contact with the iron-based fluidized bed catalyst in a fluidized bed to react under the conditions that the reaction pressure is 0.5-10MPa, the reaction temperature is 200-600 DEG C, reaction air speed is 100-8000/h and ratio of H2/CO in the raw material gas is (0.1-5.0):1, so as to generate heavy hydrocarbon. The heavy hydrocarbon Fischer-Tropsch synthesis catalyst can be applied to industrial production of fluidized bed Fischer-Tropsch synthesis reaction.

The invention discloses a metal cutting fluid with good rust prevention and mildewproof effects. The metal cutting fluid is characterized by being prepared from raw materials in parts by weight as follows: 6-8 parts of inositol hexaphosphate, 1-2 parts of 2-mercaptobenzothiazole, 1-2 parts of ditetradecyl thiodipropionate, 2-3 parts of EDTA (ethylene diamine tetraacetic acid) disodium salt, 5-7 parts of glycerin, 2-3 parts of monoethaneamine benzoate, 1-2 parts of a silane coupling agent KH-550, 1-2 parts of sodium carbonate, 4-6 parts of coconut oil, 2-3 parts of sodium alkyl benzene sulfonate, 1-2 parts of sodium hydroxide, 3-5 parts of polyether polyol, 5-7 parts of an auxiliary and 150-180 parts of water. The auxiliary added to the cutting fluid enhances the dispersion, lubrication and film-forming property of the cutting fluid; the added inositol hexaphosphate has excellent rust prevention capability, forms a compact monomolecular film on the surface of metal, effectively resists metal corrosion and rusting, has long maintaining time and remarkable effect and is non-toxic and environment-friendly; the added 2-mercaptobenzothiazole has good sterilization and corrosion resistance capability, invasion of microorganisms, bacteria and the like is resisted, deterioration is prevented, and the storage time is long; and the prepared cutting fluid has a wide application prospect.

The invention provides a graphene-modified heat-conducting and insulating nylon 6 material. The graphene-modified heat-conducting and insulating nylon 6 material is characterized by comprising the following components in percent by mass: 37-75.5% of high-flow nylon, 5-15% of glass fiber, 1-5% of basalt fiber powder, 5-10% of sulfonated graphene, 1-3% of nanometer molybdenum powder, 10-20% of ceramic powder, 0.5-2% of nanometer cellulose, 1-6% of lead nitrate and 1-2% of a processing aid. The invention further discloses a preparation method of the graphene-modified heat-conducting and insulating nylon material. The graphene-modified heat-conducting and insulating nylon material prepared according to the preparation method provided by the invention has an insulating property as well as highheat conductivity, and has the heat conductivity coefficient as high as 4 W/mk.

The invention relates to a concrete prefabricated bridge deck slab with a plasticizer, characterized by the following specific steps for manufacturing the concrete prefabricated bridge deck slab with the plasticizer: weighing 15-20 parts by mass of 2-acrylamido-2-methylpropanesulfonic acid, adding 150-160 parts by mass of water and stirring uniformly for later use; adding the prepared 2-acrylamido-2-methylpropanesulfonic acid water solution to a vessel, heating until the temperature rises to 42DEG C, and adding 5-6 parts of 2,2'-azobisisobutyronitrile and 2-3 parts of sodium thiosulfate; and continuing stirring, regulating the pH value to be equal to 6.5, after the temperature drops to 30DEG C, respectively adding 20-30 parts of methacryloyloxyethyl trimethyl ammonium chloride and 10-15 parts of hexafluorobutyl methacrylate, and uniformly mixing. The plasticizer in the concrete prefabricated bridge deck slab improves the surface polarity of cement particles in concrete, promotes dispersion of the cement particles, improves the liquidity of concrete, performs effective moisture holding on concrete, prolongs the setting time of concrete, enables complete hydration reaction of concrete, and improves the compression strength and tensile strength of a concrete slab.

The invention belongs to the technical field of lithium ion battery flame-retardant materials, and particularly relates to a lithium ion battery flame-retardant material for energy storage and a preparation method and application thereof. The lithium ion battery flame-retardant material for energy storage is prepared by blending a composite flame retardant, naphthenic oil, a coupling agent and polypropylene, wherein the composite flame retardant is prepared from polyphosphate, aluminum hydroxide and magnesium hydroxide; wherein the mass ratio of the polymeric phosphate to the aluminum hydroxide to the magnesium hydroxide to the naphthenic oil to the coupling agent to the polypropylene is (10-40): (10-30): (6-30): (5-20): (0.5-3): (95-105). According to the flame-retardant polypropylene material, the naphthenic oil wraps the periphery of the flame retardant, the effects of improving compatibility and promoting dispersion are achieved in the blending process, the dispersion uniformity degree of the composite flame retardant in a polypropylene matrix is improved, and the problem that in an existing flame-retardant polypropylene material, the dispersity of the flame retardant in the polypropylene matrix is poor is solved.

The invention relates to a preparation method of a three-dimensional porous antibacterial silk fibroin/graphene/titanium dioxide bone tissue engineering scaffold, comprising the following steps: 1) degumming silkworm cocoons and carrying out subsequent treatment to obtain a 1-4% aqueous solution of RSF; 2) ultrasonically dispersing a graphite oxide (GO) dispersion, titanium dioxide (TiO2) hydrosoland ethanol and blending, synthesizing rGO(at)TiO2 composite nanoparticles by a hydrothermal method, and washing and drying to obtain a powder; 3) ultrasonically dispersing the rGO(at)TiO2 powder inwater, and blending the rGO(at)TiO2 powder into the aqueous solution of RSF in 1); 4) concentrating the mixed solution in 3) until the mass percentage of RSF is 4-15%; 5) adding the aqueous solution of ethanol to the mixed solution of RSF/rGO(at)TiO2, carrying out mechanical stirring, and standing to form a gel; and 6) superfreezing the gel and freeze-drying to prepare the RSF/rGO(at)TiO2 three-dimensional porous tissue engineering scaffold. By using the rGO(at)TiO2 composite nanoparticles for synergetic enhancement of the RSF material, mechanical properties of the RSF scaffold are improved, and the scaffold also can be endowed with antibacterial property, osteoinductive capability and other functions.

The invention belongs to the technical field of graphene batteries, and particularly relates to a graphene battery conductive agent. The graphene battery conductive agent comprises the following raw materials in parts by mass: 5-15 parts of graphene, 6-15 parts of polyacrylonitrile fiber, 2-3 parts of triethylene tetramine, 60-80 parts of ethyl alcohol, 10-25 parts of acetone, 10-18 parts of butyrolactone, 1-5 parts of terbium oxide, 0.5-1 parts of titanium carbide and 5-8 parts of fluoroethylene carbonate. The graphene battery conductive agent can reduce the cost, can improve the dispersion of graphene, can improve the conductivity and the cycle life, and can improve the low-temperature performance.