651 results about "Phosphazene" patented technology

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 belongs to the technical field of lithium ion batteries, and provides an electrolyte additive composition, an electrolyte containing the electrolyte additive composition, and a preparation method and application of the electrolyte additive composition. The electrolyte additive composition comprises an aluminum alkoxide compound and a phosphazene compound, the structure of the phosphazene compound is shown as a formula I, and R1-R6 are independently selected from fluorine, alkoxy or phenoxy. The electrolyte containing the additive composition has good thermal stability and flame retardance under high voltage, and the safety of the battery is greatly improved; in addition, the electrolyte additive composition can inhibit hydrolysis of LiPF6, so that generation of HF and side effects caused by HF are reduced. # imgabs0 #

A full-bio-based flame-retardant material and a preparation method therefor. The composition of the full-bio-based flame-retardant material comprises a hexaldehyde bio-based phosphazene monomer, and a castor oil polyamine and / or a furyl diamine, wherein the molar ratio of the total amino groups in the castor oil polyamine and furyl diamine to the aldehyde groups in the hexaldehyde bio-based phosphazene monomer is 1 : (0.8-1.2). The full-bio-based flame-retardant material is a full-bio-based material, and the mechanical and the flame-retardant properties thereof can be adjusted and controlled by adjusting the content of the castor oil polyamine and furyl diamine to adapt to the different requirements of different products for the flame-retardant material. Moreover, the full-bio-based flame-retardant material further has self-repairing, reprocessing and degradability properties.

The invention relates to the technical field of electric wire materials, in particular to a preparation process of a high-strength halogen-free flame-retardant electric wire. According to the preparation method, the polyolefin flame-retardant microspheres are obtained by adding propenylated cyclotriphosphazene, propenylated phosphaphenanthrene, methyl methacrylate, lauroyl peroxide, polyvinyl alcohol and deionized water. The flame-retardant modified boron nitride nanosheet is prepared by the following steps: firstly, preparing a flame-retardant modified boron nitride nanosheet, and then adding hydroxylated boron nitride, gamma-glycidyl ether oxypropyl trimethoxy silane and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, so as to obtain the flame-retardant modified boron nitride nanosheet. An ethylene-vinyl acetate copolymer, polyolefin flame-retardant microspheres, flame-retardant modified boron nitride nanosheets, an antioxidant and a lubricant are mixed and react, and the high-strength halogen-free flame-retardant protective sleeve is obtained. And wrapping the periphery of the copper core wire with the high-strength halogen-free flame-retardant protective sleeve to obtain a finished product. The finished product prepared by the invention has excellent flame retardant property and high strength, thereby having a wide application prospect in the technical field of electric wire materials.

The invention relates to the field of cables, and discloses a modified polyvinyl chloride composite material for cables and a preparation method thereof.The composite material comprises low-density polyethylene, polyvinyl chloride, ethylene-vinyl acetate copolymer, nitrile rubber, modified graphene oxide, modified nano calcium carbonate and auxiliaries; the modified graphene oxide is prepared by reacting acylating chlorination of graphene oxide with an anti-aging derivative, the anti-aging derivative is prepared by reducing a benzoxazole-containing intermediate generated by a reaction of 2-amino-4-bromophenol and 4-cyanobenzaldehyde to obtain an aminated benzoxazole-containing intermediate, then the aminated benzoxazole-containing intermediate reacts with p-phenylenediamine, and then the product reacts with 3-(3, 4-dichlorophenyl)-1, 2, 3-triazole-3-one to obtain the anti-aging graphene oxide. 2, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride is subjected to a reaction to prepare the product. And the modified nano calcium carbonate is prepared by reacting phosphonitrilic chloride trimer with an amino silane coupling agent and 2-amino benzoxazole-5-borate and then grafting on the surface of the nano calcium carbonate. The composite material prepared by the invention has excellent flame retardance, heat resistance and long-acting oxidation resistance.

The invention discloses a high-performance fluororubber sealing material and a preparation method thereof, and relates to the technical field of fluororubber. The high-performance fluororubber sealing material comprises the following components in parts by weight: 100 parts of raw fluororubber, 20-35 parts of modified fluororubber, 4-8 parts of maleic anhydride grafted ethylene propylene diene monomer, 20-35 parts of a reinforcing agent, 2.5-3.5 parts of a vulcanizing agent and 4-8 parts of an auxiliary agent. Wherein the modified fluororubber is prepared by reacting amino-containing perfluoropolyether, amino-terminated cyclotriphosphazene and epoxy-terminated liquid fluororubber; the reinforcing agent is obtained by uniformly mixing polydopamine coated silicon dioxide and carbon black and then modifying the mixture with (3, 3, 3-trifluoropropyl) methyldimethoxysilane. By combining the modified fluororubber, the maleic anhydride grafted ethylene propylene diene monomer and the reinforcing agent, the processability, the mechanical property, the high temperature resistance and other properties of the fluororubber are effectively enhanced synergistically.

The invention relates to the technical field of fibers, and discloses a high-elasticity polyurethane flame-retardant fiber, a preparation method and application of the high-elasticity polyurethane flame-retardant fiber to a telescopic electric wire. The preparation method comprises the following steps: by using 1, 1, 3, 3-tetramethyldisiloxane as a bridging agent through hydrosilylation reaction, connecting allyl modified DOPO with allyl phenoxy cyclotriphosphazene to prepare a flame retardant with three flame-retardant elements of phosphorus, nitrogen and silicon at the same time; the preparation method comprises the following steps: preparing a polyurethane urea solution by a method of adding 4, 4-diphenylmethane diisocyanate in batches, introducing a flame retardant, mixing the polyurethane urea solution with an antioxidant, a dyeing assistant and a delustering agent, and carrying out dry spinning to obtain the high-elasticity polyurethane flame-retardant fiber. The polyurethane fiber has excellent flame retardant property and heat resistance, and good mechanical property and resilience, and can be applied to telescopic electric wires.

The invention relates to the technical field of refractory materials, in particular to a waste magnesia-calcium brick-containing refractory material and a preparation method thereof, and the waste magnesia-calcium brick-containing refractory material comprises the following components: composite aggregate, calcium aluminate cement, urea resin-aluminum dihydrogen phosphate, active alpha-Al2O3 micro powder, silica micro powder and sodium tripolyphosphate. In the room-temperature spraying maintenance and low-temperature working stage, hydration of free CaO in the waste magnesia-calcium bricks and erosion of OH <-> are prevented through the hydrophobic effect of fluorinated polyphosphazene and modified zirconium oxide sol, and the compatibility and wettability of the composite aggregate and cement paste are improved through carboxylic acid groups of carboxyethyl silanetriol and polyethylene glycol monomethyl ether. According to the present invention, with the temperature rising, the aluminum dihydrogen phosphate forms the viscous liquid phase to wrap the aggregate so as to provide the temporary protection, the temperature continues to rise, the zirconium oxide and the nanometer Al2O3 react with the CaO and the MgO to generate the CaZrO3 and the MgAl2O3, the aluminum dihydrogen phosphate reacts with the nanometer Al2O3 in the system to generate the AlPO4, and the CaZrO3, the MgAl2O3 and the AlPO4 form the multi-phase fire-resistant structure so as to further improve the fire resistance of the fire-resistant material;

The invention discloses flame-retardant recyclable compressible biodegradable cellulose aerogel and a preparation method and application thereof.The preparation method comprises the following steps that 1, phosphorus / nitrogen-containing bridged organosiloxane and tetraethyl orthosilicate are added into bacterial cellulose dispersion liquid and stirred to be uniform, and a milk white dispersion solution is prepared; (2) heating, curing, pre-freezing and freeze-drying the milky white dispersion solution to obtain the flame-retardant recyclable compressible biodegradable cellulose aerogel, and the phosphorus / nitrogen-containing bridged organosiloxane is prepared by carrying out a reaction on phosphonitrilic chloride trimer and 3-aminopropyltriethoxysilane. The prepared cellulose aerogel is excellent in flame retardance, heat insulation and cyclic compression performance, and has a feasible application prospect in the aspect of radiation refrigeration.

The invention relates to the technical field of electric power facilities, in particular to a high-strength flame-retardant fireproof cable and a preparation method thereof. The phosphonitrile flame retardant is prepared by adding phosphonitrilic chloride trimer, phenylphosphonic acid, triethylamine and melamine. Then, 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, the modified carbon nanotubes and the flame-retardant modified halloysite nanotubes are used as main raw materials, and the flame-retardant filler is prepared. The preparation method comprises the following steps: mixing polyolefin, a phosphazene flame retardant, a flame-retardant filler, talcum powder, gum and stearic acid, fully stirring and melting to obtain a sizing material, and carrying out crosslinking, granulation and molding on the sizing material to obtain the cable protection sleeve. And wrapping the outermost layer of the cable with the cable protection sleeve to obtain a finished cable. The finished cable prepared by the invention has good flame retardance and mechanical strength, so that the cable has a wide application prospect in the technical field of electric power facilities.

The invention discloses an indoor flame-retardant insulated flexible wire and a preparation method thereof, belongs to the technical field of flexible wires, and is used for solving the technical problem that the insulating property and flame-retardant property of an indoor flexible wire in the prior art need to be further improved. The cable comprises a wire layer formed by twisting a plurality of copper wires, an insulating layer and an outer sheath layer, a modified aminating agent taking a siloxane chain segment as a main body is prepared, polyvinyl chloride is aminated and hybridized with a space chain segment of the polyvinyl chloride at the same time, after phosphorus-hydrogen addition and surface modification, the hybridized polyvinyl chloride is obtained, and through sodium hypophosphite and 1, 2, 4-trimethyl-1, 3-pentanediol, the flame retardant is added to the polyvinyl chloride, so that the cable is formed. The preparation method comprises the following steps: carrying out phosphorus-hydrogen addition on 2, 3-dihydroxystyrene to obtain a modified cross-linking agent, forming a spherical structure by the modified cross-linking agent and phosphonitrilic chloride trimer under triethylamine and ultrasonic conditions, carrying out surface modification to obtain flame-retardant microspheres, and carrying out melt extrusion on the modified cross-linking agent and phosphonitrilic chloride trimer as main materials and auxiliary materials of an outer sheath layer to finally prepare the flame-retardant insulated flexible wire.

The present application relates to the field of polymer composite materials, and more specifically, it relates to a fluorine-free flame retardant PC material and a preparation method thereof, which is composed of the following raw materials in weight percentage: 10-15% silicon PC, 0.1-1% anti-aging agent, 2-6% fluorine-free flame retardant, and the balance is PC; the fluorine-free flame retardant is composed of at least three of polydiphenyloxyphosphazene, tetraphenyl bisphenol A diphosphate, polydimethylsiloxane, and methacrylate-based phenyl polymer complex. When polydiphenyloxyphosphazene, tetraphenyl bisphenol A diphosphate, polydimethylsiloxane, and methacrylate-based phenyl polymer complex are compounded, a synergistic effect is achieved, and the silicon PC is combined to make the prepared PC material have better flame retardant properties, light transmittance, anti-aging properties, and physical properties.

The invention relates to the field of fabrics, in particular to a breathable composite fabric and a preparation process thereof.The breathable composite fabric is characterized in that base cloth and a reinforcing layer are subjected to composite crocheting through polyester fibers to obtain a fabric body, and then the fabric body is transferred to protective finishing liquid to be subjected to padding treatment; bamboo charcoal fibers and cotton fibers are blended to serve as warps, the cotton fibers serve as wefts, and the warps and the wefts are interwoven to form base cloth; bamboo charcoal fibers are selected as warps, polyester fibers are selected as wefts, and the warps and the wefts are interwoven to form a reinforcing layer; the preparation method comprises the following steps: modifying chitosan with acrylic acid to obtain soluble N-carboxyethyl chitosan; the preparation method comprises the following steps: quantitatively modifying vanillin methacrylate by gelatin, modifying the gelatin by dopamine, and then grafting hexaborophosphazene; the preparation method comprises the following steps: by taking zinc acetate as a zinc source and cellulose nanocrystals as a template, carrying out in-situ polymerization-precipitation to obtain composite cellulose nanocrystals, carrying out dopamine polymerization to obtain polydopamine-coated composite cellulose nanocrystals, and then grafting hexaborophosphazene to obtain the modified cellulose nanocrystals.

The invention relates to an aliphatic copolyester elastomer and a preparation method thereof, and belongs to the field of high polymer materials. The elastomer is prepared through a series ring-opening copolymerization reaction of epoxide and cyclic anhydride, and the method comprises the following steps: under the action of a metal-free catalyst (a phosphazene ligand P1-tert-octyl / triethyl boron system) and an initiator (terephthalyl alcohol), carrying out a series ring-opening copolymerization reaction on epoxide and cyclic anhydride, the preparation method comprises the following steps: reacting epoxide (such as epoxypropane and allyl glycidyl ether) with aliphatic anhydride (such as glutaric anhydride) in a xylene solvent to generate a polyester prepolymer retaining an active end; adding a second group of epoxide (such as cyclohexene oxide) and anhydride (such as tetrahydrophthalic anhydride and norbornene dianhydride), continuously reacting to form a block copolymer, and then crosslinking. The material performance can be regulated by changing the monomer combination, the atom economy is high, and the raw materials can be produced on a large scale. The process is simple and environment-friendly, and a new choice is provided for application of the degradable elastomer in the fields of medical treatment, environmental protection and the like.

The invention relates to the field of electric wires and cables, and discloses a high-temperature-oxidation-resistant flame-retardant electric wire and cable and a preparation method thereof.The sheath layer of the electric wire and cable comprises low-density polyethylene, nitrile rubber, natural rubber, ethylene-tetrafluoroethylene copolymer, modified multi-walled carbon nanotubes, modified nano titanium dioxide and auxiliaries; the modified multi-walled carbon nanotube is prepared by reacting an acylating chlorination multi-walled carbon nanotube with a polycyclotriphosphazene derivative; the polycyclotriphosphazene derivative is prepared by reacting hexachlorocyclotriphosphazene with p-aminodiphenylamine and then taking diphenyl dihydroxysilane as a linker; the modified nano titanium dioxide is prepared by the following steps: substituting phenylphosphoryl dichloride with phloroglucinol, then sequentially substituting with 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride and 3-aminopropyltriethoxysilane, and grafting an obtained antioxidant phosphorus-containing coupling agent with nano titanium dioxide. The sheath layer material prepared by the invention has excellent high-temperature oxidation resistance, flame retardance, wear resistance and heat resistance.

The invention belongs to the technical field of polyurethane materials, and particularly relates to a tripolyphosphazene derivative and a preparation method and application thereof, castor oil-based phosphorus-containing polyester polyol and a preparation method thereof, and a flame-retardant polyurethane material. The tripolyphosphazene derivative provided by the invention has a structure as shown in a formula I. The tripolyphosphazene derivative provided by the invention does not contain metal elements, and has the characteristics of high catalytic efficiency, low reaction temperature and good selectivity when being used as a catalyst for preparing castor oil-based polyol. Meanwhile, the tripolyphosphazene derivative provided by the invention does not need to be subsequently separated when being used as a catalyst for preparing the castor oil-based polyol, can be used as a flame retardant for improving the flame retardant property of the castor oil-based polyol, has good compatibility with the castor oil-based polyol, and does not influence the performance of a subsequent polyurethane product.

The invention belongs to the field of flame retardance of high polymer materials, and relates to a preparation method of a metal organic framework polyphosphazene flame retardant and application of the flame retardant in PET flame retardant modification.The preparation method comprises the steps that a metal salt solution and a phytic acid solution are mixed according to the molar ratio of (3-15): 1, the pH is adjusted to 7-8, alcohol is added for a reaction, and phytic acid-based MOFs are obtained; mixing the phytic acid-based MOFs with a 4, 4 '-disubstituted diphenyl compound, triethylamine and alcohol to obtain a second mixed solution; hexachlorocyclotriphosphazene (HCCP) is mixed with the second mixed solution, the molar ratio of the 4, 4 '-disubstituted diphenyl compound to the HCCP is (2-4): 1, the mixture reacts at the temperature of 20-90 DEG C, and the phytic acid group MOFs (at) HCCP is obtained. HCCP is hybridized on the surface of phytic acid-based MOFs, and the flame retardant has excellent flame retardance and environmental protection performance by utilizing the char-forming catalytic capability of the phytic acid-based MOFs and the phosphorus-nitrogen flame retardance characteristic of HCCP.

The invention relates to the field of lithium metal batteries, and provides a lithium metal battery, a manufacturing method thereof and electric equipment, which are at least beneficial to realizing stable work of a high-voltage lithium metal battery in a wide electrochemical window. The manufacturing method comprises the following steps: forming an initial battery cell; injecting a first electrolyte containing lithium nitrate, a lithium salt and an ether organic solvent into the initial cell; performing a first formation process; injecting a second electrolyte containing fluoroethylene carbonate, a lithium salt, a cyclic phosphazene derivative and a nitrile organic solvent into the initial cell; wherein the structural formula of the cyclic phosphazene derivative is shown in the specification, or R1-R8 are independently selected from alkoxy, cyano-containing alkoxy or fluorine-containing alkoxy, and at least one cyano-containing alkoxy and one alkoxy or fluorine-containing alkoxy exist in R1-R6; and performing a second formation process.

The invention discloses an ultraviolet curing organic silicon conductive adhesive and a preparation method thereof, and relates to the technical field of conductive materials, the ultraviolet curing organic silicon conductive adhesive comprises the specific components of organic silicon matrix resin, a photosensitive curing agent, a conductive filler, a reactive diluent, a coupling agent and a thixotropic agent; the photosensitizer further comprises carborane cluster particles, a phosphazene silane nanocage, a sulfur-doped tungstate nanosheet, a potassium fluoride modified hollow graphene ball and an additive of a germanoxane photosensitizer. The material is prepared based on the materials. According to the preparation method, multiple functional additives are introduced into a traditional ultraviolet curing organic silicon conductive adhesive system, a multi-dimensional conductive path is constructed on the molecular and nanoscale, and the photocuring initiation efficiency and the interface stability are optimized, so that the prepared conductive adhesive not only realizes low resistivity, but also can be rapidly and deeply cured in an adhesive layer with relatively high thickness; and meanwhile, excellent damp-heat resistance and corrosion resistance are achieved.

The invention relates to the field of pipeline materials, and discloses a halogen-free flame-retardant MPP power pipeline material and a preparation method thereof.The pipeline material comprises polypropylene, modified multi-walled carbon nanotubes, a coating filler, a compatilizer and a lubricant; the modified multi-walled carbon nanotube is prepared by carrying out acylating chlorination on an oxidized multi-walled carbon nanotube by using thionyl chloride and then reacting with an aminated cyclotriphosphazene derivative; according to the aminated cyclotriphosphazene derivative, phosphonitrilic chloride trimer and 3, 5-di-tert-butyl-4-hydroxybenzylamine react to prepare a cyclotriphosphazene intermediate, the cyclotriphosphazene intermediate and N, N '-bis-(2, 2, 6, 6-tetramethyl-4-piperidyl)-1, 6-hexamethylenediamine are subjected to substitution to prepare a cyclotriphosphazene derivative, and then the cyclotriphosphazene derivative and 1, 6-hexamethylenediamine are subjected to substitution to obtain the aminated cyclotriphosphazene derivative. The coating filler is prepared by preparing modified lignin by combining 2, 2, 6, 6-tetramethyl-4-piperidinol and lignin and then preparing silicon dioxide-coated modified lignin by adopting a sol-gel method, and the pipe prepared by the invention has excellent mechanical properties, flame retardance, thermo-oxidative aging resistance and ultraviolet aging resistance.

The invention belongs to the technical field of sodium ion batteries, and particularly relates to a sodium ion solid electrolyte system, a battery and a preparation method thereof.The solid electrolyte system comprises a solid electrolyte membrane and a gel electrolyte formed by curing a gel electrolyte precursor solution, and the solid electrolyte membrane is prepared from a polymer matrix and an inorganic solid electrolyte, sodium salt, a plasticizer and a first solvent; the inorganic solid electrolyte comprises an oxide electrolyte; the gel electrolyte precursor solution is prepared from the following raw materials: a monomer, sodium salt, an auxiliary agent, an initiator and a second solvent; the auxiliary agent is prepared from one or more than two of ethoxypentafluorocyclotriphosphazene, hexafluorocyclotriphosphazene, pentafluorophenoxy cyclotriphosphazene, triethyl phosphate and trimethyl phosphate. The solid electrolyte membrane disclosed by the invention has relatively high ionic conductivity and dendritic crystal resistance, and the gel electrolyte can improve the interface problem of the sodium-ion solid-state battery and reduce the liquid injection amount of the battery, so that the safety performance of the sodium-ion solid-state battery is improved.

The invention discloses a polyamide composition and a preparation method thereof. The polyamide composition is prepared from the following raw materials: PA66 resin, low dielectric glass fibers, PPO-g-MAH, a polyborosiloxane polymer, hexaphenoxy cyclotriphosphazene, functionalized POSS (Polyhedral Oligomeric Silsesquioxane), a DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) flame retardant and a high-temperature-resistant antioxidant. The polyamide composition has excellent mechanical properties, flame retardancy and low dielectric properties, and can be widely applied to the communication field requiring halogen-free flame retardancy.

The invention provides a battery, the battery comprises a negative plate, a positive plate and an electrolyte, the negative plate comprises a negative current collector and a negative active layer located on the surface of one side or two sides of the negative current collector, the negative active layer comprises a silicon-based material, and in the negative active layer, the weight ratio of silicon element is 2-45%; the electrolyte comprises difluoroethylene carbonate, fluoroethylene carbonate and a phosphazene compound, and in the electrolyte, the weight ratio of the difluoroethylene carbonate to the fluoroethylene carbonate is 0.002-0.4; the molecular structure of the phosphazene compound comprises cyano groups and phosphorus atoms, and the weight ratio of the phosphazene compound in the electrolyte is 0.1-5%. According to the battery, a firm and flexible SEI film can be formed on the surface of the silicon-based negative electrode, repeated breakage of the SEI film is reduced or even avoided, meanwhile, the concentration of HF can be reduced, the internal short circuit and self-discharge risks of the battery are reduced, and the long-cycle stability and the high-temperature cycle performance are improved.

The invention discloses a resin composition for a benzocyclobutenyl cyclotriphosphazene copper-clad plate as well as a preparation method and application of the resin composition, and belongs to the field of electronic resin synthesis. Comprising 20-33 parts by weight of benzocyclobutenyl cyclotriphosphazene, 67-80 parts by weight of hydrocarbon resin, 0.0-0.22 part by weight of an initiator, 25-53 parts by weight of a filler, and a first solvent accounting for 34-36 wt% of the total weight of the benzocyclobutenyl cyclotriphosphazene, the hydrocarbon resin and the filler, when the resin composition for the copper-clad plate is applied to the preparation of the copper-clad plate, the resin composition is firstly prepared into a resin glue solution, then glass fiber cloth is impregnated in the resin glue solution, and the halogen-free flame-retardant copper-clad plate is prepared through the steps of baking, sheet overlapping, hot pressing, cooling and pressure relief. The resin composition for the copper-clad plate has excellent flame retardant property, dielectric property, heat resistance and the like under the interaction of benzocyclobutenyl cyclotriphosphazene and hydrocarbon resin, and can endow the copper-clad plate with excellent flame retardant property, dielectric property, heat resistance and the like.

The invention relates to the technical field of rubber modification, in particular to a method for enhancing thermal stability and oxidation stability of ethylene propylene diene monomer rubber by using functionalized h-BN nanosheets. Comprising the following steps: S1, preparing a hydroxylated h-BN nanosheet; s2, synthesizing phosphazene modified boron nitride, namely purifying hexachlorocyclotriphosphazene for later use, then weighing 1g of h-BN-OH powder, grinding, pouring the powder into a three-necked flask containing 100ml of acetone, carrying out ultrasonic stirring for 2 hours, then adding 0.8 g of 4, 4-dihydroxybiphenyl, continuously stirring for 10 minutes, dropwise adding an acetone solution of HCCP and 5ml of triethylamine, adding tannic acid after reaction, cooling to room temperature after the reaction is finished, and filtering to obtain the phosphazene modified boron nitride. Washing and drying to obtain phosphazene modified boron nitride; and S3, preparing the phosphazene modified boron nitride / EPDM composite material. Through the synergistic effect of P / N groups and phenolic hydroxyl groups in the phosphazene modified boron nitride, the phosphazene modified boron nitride can achieve an excellent flame retardant effect under the condition of low flame retardant additive amount, and the use amount of the flame retardant is remarkably reduced.

The invention discloses a polyphosphazene flame-retardant electrolyte, a lithium ion battery containing the electrolyte and a preparation method of the lithium ion battery, and belongs to the technical field of lithium ion batteries. The electrolyte comprises a lithium salt, an organic solvent, a cosolvent, an additive, a cross-linking agent, a polymer monomer and a polymerization initiator, and is prepared in an in-situ or ex-situ polymerization mode. According to the polymer electrolyte or gel electrolyte provided by the invention, on the basis of various flame-retardant mechanisms of a phosphazene structure and a polymer network structure of a three-dimensional network structure, the overall thermal stability is improved, the intrinsic safety of a battery is improved, the safety risk caused by abuse, overcharge and overdischarge, needling, collision and the like is reduced, and the service life of the battery is prolonged. And a new direction is provided for further developing a multi-element composite flame-retardant material and promoting the safety of a lithium ion battery.

The invention discloses a smoke-suppression flame-retardant ecological board and a preparation method thereof. The ecological board comprises a base material, a flame-retardant adhesive layer and a facing layer which are sequentially stacked, wherein the flame-retardant adhesive layer is prepared from the following raw materials: 100 parts of urea-formaldehyde resin, 10-15 parts of a phosphorus-nitrogen composite flame retardant and 5-10 parts of flame-retardant filler; the preparation method of the phosphorus-nitrogen composite flame retardant comprises the following steps: carrying out an aminomethylation reaction on p-hydroxybenzoic acid, ethanolamine and paraformaldehyde which are used as raw materials in a molar ratio of 1: (1-1.2): (2-2.2) to prepare a Mannich base intermediate; and carrying out substitution reaction on the Mannich base intermediate and phosphonitrilic chloride trimer serving as raw materials according to the molar ratio of (3-7): 1. The phosphorus-nitrogen flame retardant disclosed by the invention is high in content of phosphorus and nitrogen elements and uniform in distribution ratio, and has more excellent synergistic smoke suppression and flame retardant effects compared with an existing physical compound system.

The invention discloses a bio-based core-shell flame retardant, a preparation method thereof and a preparation method of a composite material. A novel biomass-based polyphosphazene flame-retardant microsphere (PHRB) is prepared based on a condensation reaction of biomass resveratrol and phosphonitrilic chloride trimer, a self-sacrifice template method is further adopted, three-dimensional (3D) cobalt layered double hydroxide (Co-LDH) grows on the surface of the microsphere in situ, and the 3D bio-based Co-LDH-PHR flame retardant with a core-shell structure is successfully constructed. The bio-based core-shell flame retardant obtained in the invention has good thermal stability, high residual carbon content, high flame retardant efficiency and good compatibility with a base material, and the flame-retardant polyurea composite material prepared from the bio-based core-shell flame retardant as a raw material still has excellent mechanical properties. The bio-based core-shell flame retardant disclosed by the invention is wide in raw material source, relatively low in cost, simple in synthesis mode, convenient to operate and easy for large-scale production.

The flame-retardant polycarbonate resin composition containing (A) 100 parts by weight of polycarbonate resin (component A); and with respect to (A); (B) (B-1) 1 to 30 parts by weight of ABS resin (component B-1-1), 1 to 10 parts by weight of methyl methacrylate-butadiene-styrene copolymer (component B-1-2), (B-2) 1 to 100 parts by weight of aromatic polyester resin (component B-2), or (B-3) 0.1 to 160 parts by weight of inorganic filler (component B-3); (D) 1 to 45 parts by weight of phosphazene (component D) containing 98.5 mol % or more of phosphazene cyclic trimer; and (E) 0.05 to 4 parts by weight of anti-drip agent (component E), and a molded product thereof, which has excellent impact strength, flame retardancy, and durability.

The invention provides a high-safety flexible pole piece, a preparation method and a flexible lithium ion battery, the pole piece comprises a current collector and a coating arranged on the surface of the current collector, the coating comprises a flexible isolation structure and a plurality of electrode units, the flexible isolation structure constructs a plurality of accommodating areas isolated from each other on the surface of the current collector, the number of the electrode units is multiple, and the flexible isolation structure is arranged in the accommodating areas. The plurality of electrode units are respectively and independently arranged in different accommodating areas. According to the invention, accurate prevention and control of thermal runaway are realized through the electrode structure design of partition isolation and a material system with multiple hydrogen bonds synergistic effect. The electrode is divided into independent units by the flexible isolation structure, so that heat spreading is effectively blocked; and a hydrogen bond network formed by the hydroxyl-containing comonomer I, PI, PET and hexaphenoxy cyclotriphosphazene significantly enhances the interface stability and flame retardant efficiency of the electrode and the isolation structure, and improves the intrinsic safety of the battery while ensuring the flexibility of the battery.