4956 results about "Flame resistance" patented technology

The invention discloses a flame-retardant high-temperature-resistant fiber and a preparation method thereof, and relates to the technical field of fibers. When the flame-retardant high-temperature-resistant fiber is prepared, 1, 6-hexamethylenediamine, 1, 6-adipic acid, tetrahydrodifuran [3, 4-B: 3 ', 4'-D] furantetraone and a phosphorus-sulfur composite flame retardant are copolymerized to generate a polyamide-polyamide acid solution; 4-aminopyridine and the polyamide-polyamide acid solution are subjected to a reaction, and modified polyamide is prepared; the modified polyamide is subjected to melt spinning, and polyamide fibers are prepared; the preparation method comprises the following steps: pretreating nano titanium dioxide by using 4-bromobutyl trimethoxy silane to prepare modified nano titanium dioxide; mixing the modified nano titanium dioxide and ethanol to prepare a light-resistant antibacterial finishing agent; and carrying out post-treatment on the polyamide fiber by using an anti-light antibacterial finishing agent to prepare the flame-retardant and high-temperature-resistant fiber. The prepared fiber is excellent in comprehensive performance, particularly outstanding in flame retardance and high temperature resistance, and suitable for the fields of special protective clothing, high-temperature filtering materials and the like.

The invention discloses a high-bonding-strength flame-retardant composite current collector base film and a preparation method thereof. The high-bonding-strength flame-retardant composite current collector base film is prepared from the following raw materials in parts by weight: 100 parts of PP resin, 1.5 parts of a lubricant, 0.8 part of an antioxidant and 16 parts of reinforced flame-retardant composite particles, the reinforced flame-retardant composite particles are prepared by the following steps: S1, preparing amidated porous carbon microspheres; s2, compounding the amidated porous carbon microspheres with mica powder to prepare a composite carrier; s3, loading a flame retardant to prepare a flame-retardant compound; s4, in-situ grafting of maleic anhydride grafted polypropylene is carried out, and the reinforced flame-retardant composite particles are obtained. By adding the reinforced flame-retardant composite particles into the PP resin, the flame retardance and mechanical strength of the PP-based composite current collector base film and the interface bonding force between the PP base film and the metal conductive layer can be comprehensively improved.

The invention discloses a preparation method of an interface-modified flame-retardant polypropylene-based bamboo-plastic composite material. According to the method, a modification solution composed of a polyphenol component and a boron-containing component is adopted, bamboo powder is treated under the normal-temperature stirring condition, and the interface modified bamboo powder is successfully prepared. The mechanism is that polyphenol and a boron-containing component are subjected to a coordination reaction on the surface of bamboo powder, and a reversible borate dynamic covalent bond is constructed. The dynamic bond has a temperature response characteristic: reversible dissociation is realized during high-temperature processing, so that the melt viscosity of a composite system is reduced, and the processing fluidity is improved; the interface bonding force between the bamboo powder and the polypropylene matrix and the mechanical strength of the composite material are remarkably enhanced. In addition, the introduced boron element is used as an efficient flame-retardant component and promotes generation of a compact protective carbon layer during combustion, so that the flame-retardant property of the composite material is comprehensively improved.

The invention discloses a multi-element low-alloying high-speed extrusion flame-retardant magnesium alloy and a preparation method thereof. The alloy comprises the following components in percentage by mass: 0.5 to 2.0 percent of Al, 0.2 to 1.0 percent of Zn, 0.1 to 1.0 percent of Mn, 0.2 to 0.8 percent of Ca, 0.2 to 1.0 percent of heavy rare earth element Y, Er or Gd and the balance of Mg and inevitable impurities. Through the synergistic effect of non-rare earth elements Al, Zn, Mn and Ca and trace heavy rare earth elements, matching of low cost, good mechanical property and flame retardant property is realized. After the alloy is subjected to optimized bipolar homogenization heat treatment, the alloy can be subjected to extrusion production at the extrusion rate of 10-30 m / min. The room-temperature ultimate tensile strength is larger than or equal to 270 MPa, the yield strength is larger than or equal to 240 MPa, the ductility is larger than or equal to 12%, and the ignition point is larger than or equal to 850 DEG C. Important support is provided for propelling the magnesium alloy extrusion material to achieve equipment lightweight and low-carbon manufacturing in the fields of rail transit, aerospace and the like.

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

The invention discloses an anti-aging flame-retardant polyvinyl chloride material and a preparation method thereof. The anti-aging flame-retardant polyvinyl chloride material comprises the following raw material components in parts by weight: 100 parts of PVC resin, 0.6-2.4 parts of a lubricant, 15-27 parts of a plasticizer and 14-25 parts of a composite flame-retardant anti-aging reinforcing filler, wherein the composite flame-retardant anti-aging reinforcing filler is obtained by sequentially carrying out antioxidant loading and polymer grafting modification on a compound of graphene oxide, basic magnesium sulfate whiskers and mesoporous alumina. The prepared polyvinyl chloride has excellent aging resistance, flame retardance and mechanical strength, is good in thermal stability and excellent in comprehensive performance, and has a wide market application prospect.

The invention relates to the field of materials, in particular to a silicon dioxide aerogel composite thermal insulation material and a preparation method thereof. The silicon dioxide aerogel composite thermal insulation material is prepared by taking silicon dioxide aerogel, phenolic resin, a nano zirconium oxide graft and a locust bean gum graft as main raw materials and taking n-pentane, UV-327, hexamethylenetetramine and an antioxidant 1010 as auxiliary materials. The nano zirconium oxide graft and the locust bean gum graft are added into the silicon dioxide aerogel material, so that the prepared silicon dioxide aerogel composite material has excellent heat-insulating property, flame-retardant property and toughening effect, and the comprehensive requirements of the use scene of the silicon dioxide aerogel composite material on toughness and flame retardance are met; and the application market is expanded.

The invention discloses a flexible fireproof cable and a preparation method thereof, and belongs to the technical field of cables. The cable comprises a conductor, a mica insulation layer, a copper protection layer, a buffer layer and a cable sheath layer. The buffer layer is made of a polyurethane foaming material; the cable sheath layer is prepared from the following components in parts by weight: 80 to 100 parts of methyl vinyl silicone rubber, 18 to 20 parts of modified carbon black, 5 to 8 parts of titanium dioxide, 1 to 2 parts of platinum catalyst, 3 to 6 parts of hydroxyl silicone oil, 0.5 to 1 part of zinc stearate and 0.8 to 1 part of dicumyl peroxide. The modified carbon black is added into the raw materials of the sheath layer, so that the compatibility, the interface bonding force and the flame retardant property of the carbon black and a silicone rubber matrix are effectively improved, and the mechanical property, the wear resistance and the fireproof property of the cable sheath layer are remarkably enhanced.

The invention discloses a flame-retardant ABS (Acrylonitrile Butadiene Styrene) composition as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The flame-retardant ABS composition provided by the invention comprises the following components in parts by mass: 50-80 parts of ABS resin; 8 to 12 parts of styrene-acrylonitrile copolymer; 3 to 5 parts of styrene-acrylonitrile-maleic anhydride terpolymer; 2 to 6 parts of a fluorine-containing maleimide copolymer; 5 to 15 parts of graphite nanosheet modified high rubber powder; 12 to 18 parts of brominated flame retardant; 3-7 parts of a phosphorus-based flame retardant; 0.1-1 part of a processing aid; the phosphorus-based flame retardant is prepared from the following components in parts by mass: 80 to 95 parts of diethyl phosphinate; 0.3 to 3 parts of ethyl butyl phosphinate; 0.1 to 2 parts of ethyl phosphonate; and 5 to 20 parts of melamine polyphosphate. The flame-retardant ABS composition prepared by the invention is good in flame retardant property, good in welding strength and low in cost.

The invention relates to the technical field of cables, and particularly discloses a high-performance halogen-free flame-retardant flexible power cable. The high-performance halogen-free flame-retardant flexible power cable comprises a core layer, an insulating layer, a flame-retardant layer, a shielding layer and a protective layer which are arranged in sequence, the flame-retardant layer is prepared from the following raw material components in parts by weight: 30 to 40 parts of ethylene-vinyl acetate copolymer, 10 to 20 parts of polyolefin elastomer, 8 to 10 parts of microencapsulated ammonium polyphosphate, 2.5 to 4.5 parts of pentaerythritol, 20 to 30 parts of inorganic flame retardant, 5 to 8 parts of expansible graphite, 2 to 3 parts of diatomite, 0.5 to 1.5 parts of nano kaolin, 2 to 3 parts of zinc borate, 0.1 to 0.5 part of antioxidant and 0.5 to 1.0 part of lubricant. The cable provided by the invention not only has good flame retardant property, but also has certain flexibility.

The application provides a high-voltage cable preparation method and a high-voltage cable. The preparation method comprises the following steps: preparing modified polyvinyl chloride, wherein the modified polyvinyl chloride comprises polyvinyl chloride and a filler added into the polyvinyl chloride; taking 100 parts by weight of the polyvinyl chloride as a base material, and the filler comprises the following components in parts by weight: 1-2 parts of polyethylene, 2-3 parts of a filler, 2-3 parts of a lubricant and 2-5 parts of a toughening agent; extruding the modified polyvinyl chloride on the outer surface of a smooth metal sheath layer to form a modified polyvinyl chloride sheath, and the modified polyvinyl chloride sheath is bonded to the smooth metal sheath layer; and the smooth metal sheath layer is wrapped on the outer surface of a cable core. The high-voltage cable preparation method can greatly improve the flame-retardant performance of the high-voltage cable.

The invention relates to the technical field of polyethylene cables, in particular to a high-strength flame-retardant polyethylene cable and a preparation method thereof.The high-strength flame-retardant polyethylene cable is composed of a copper stranded wire core and a flame-retardant protective layer on the surface of the copper stranded wire core; the flame-retardant protective sleeve is made of a high-strength flame-retardant material; the high-strength flame-retardant material comprises the following components in parts by weight: 80-100 parts of low-density polyethylene, 5-10 parts of a flame retardant, 3-5 parts of a performance additive, 1-1.5 parts of filler, 0.1-0.2 part of a voltage stabilizer, 0.1-0.5 part of an antioxidant, 0.5-1 part of an initiator and 1-5 parts of a lubricant. The amino group on the surface of the silicon dioxide carrier treated by 3-aminopropyltriethoxysilane in the modification additive can be subjected to acid-base interaction with the phosphate group of APP to form chemical bridging; the interface bonding enables the APP and the modification additive to synchronously migrate to the surface of the material during combustion to cooperatively construct a protection layer, so that the problem of protection failure caused by migration rate difference of different flame retardants in a traditional flame-retardant system is solved, and the flame-retardant performance of the cable can be greatly improved.

The invention discloses a wear-resistant vehicle body film and a preparation method thereof, and relates to the technical field of films. The wear-resistant automobile body film prepared by the invention is prepared from polytetrahydrofuran ether glycol, isophorone diisocyanate, a catalyst, dihydric alcohol quaternary ammonium salt, a functional aid, modified silicon dioxide and a chain extender. The dihydric alcohol quaternary ammonium salt is obtained by reacting N, N '-dihexyl-N, N'-dimethyl propane-1, 3-diamine with monochloroacetone and then condensing with glycerol; the functional additive is obtained by reacting 2-boric acid thiophene-4-methyl acetate with 2, 7-dibromofluorene and then carrying out bromination hydrolysis; the modified silicon dioxide is obtained by reacting pretreated silicon dioxide with melamine and then reacting with sodium hypophosphite. The wear-resistant vehicle body film prepared by the invention has good anti-aging, wear-resistant, antibacterial and flame-retardant properties.

The invention relates to the field of current collector films, in particular to a high-temperature-resistant current collector base film and a preparation method thereof. The current collector base film is prepared from the following components in parts by weight: 75 to 85 parts of PET (Polyethylene Terephthalate) resin, 8 to 12 parts of high-temperature-resistant modifier, 5 to 8 parts of silane modified nano silicon dioxide, 0.5 to 1.5 parts of lubricant, 0.5 to 1.5 parts of stabilizer, 1 to 3 parts of nucleating agent and 0.2 to 1 part of antioxidant. According to the current collector base film, PET resin is used as a main material, a high-temperature-resistant modifier and silane modified nano silicon dioxide are added to serve as reinforcing modifiers, and meanwhile other auxiliaries are added. The prepared current collector base film has excellent high-temperature resistance and good mechanical strength, also has better flame retardance and excellent comprehensive performance, and is particularly suitable for preparing a composite current collector for a lithium battery with high safety and long service life.

The invention relates to the field of packaging materials, and discloses low-temperature heat-sealing water-based coated paper and a preparation method and application thereof.The water-based coated paper comprises a base paper layer and a water-based coating, and the water-based coating comprises water-based ethylene-acrylic acid copolymer emulsion, modified nano-silica, a coalescing agent and water; a cardanol derivative is introduced into the water-based ethylene-acrylic acid copolymer emulsion as a functional component; the cardanol derivative is prepared by reacting epoxidized cardanol with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and then grafting with acryloyl chloride. The preparation method comprises the following steps: reacting epoxidized cardanol with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide; the modified nano silicon dioxide is prepared by mixing aminated nano silicon dioxide and chitosan and adding a cross-linking agent prepared by grafting phytic acid and ethylene glycol diglycidyl ether. The water-based coating paper prepared by the invention overcomes the defects that the existing BOPP film is not environment-friendly, and the conventional coating paper is high in heat sealing temperature and easy to stick; meanwhile, good mechanical properties, water resistance and flame retardance are achieved.

The invention provides a flame-retardant magnesium alloy with efficient forming diversification and a preparation method of the flame-retardant magnesium alloy. The flame-retardant magnesium alloy comprises the following components in percentage by mass: 4.0-10.0% of Al, 0.2-1.6% of Ca, 0.01-0.5% of Mn, 0.1-1.5% of RE, less than or equal to 0.05% of inevitable impurities and the balance of Mg, and the added RE is one or any combination of Ce, Sm, La and Sr. The preparation method comprises the following steps: smelting and casting, granulating and pulping, and performing pressure injection molding. According to the preparation method, diversified efficient forming of complex curved surfaces, thin-wall parts, special-shaped components and the like can be achieved through cooperative regulation and control of components, the process and the structure, and the obtained flame-retardant magnesium alloy is compact in structure, has the multi-level structural characteristics including a spherical primary solid phase, a fine solidification secondary phase and a grain boundary net-shaped eutectic phase and meanwhile has good flame retardance and mechanical performance; the ignition point is 750-1200 DEG C, the yield strength is 130-200 MPa, the tensile strength is 230-300 MPa, the ductility is 5-20%, and the aluminum alloy is suitable for industrial production.

The invention belongs to the technical field of new energy materials, and particularly relates to siloxane crosslinking modified polyether solid electrolyte and a preparation method thereof. According to the solid electrolyte, the electrophilic ring-opening polymerization reaction of a polymer monomer with an epoxy group is utilized, siloxane is used as a cross-linking agent, polyether chain structures are connected together to form a cross-linked network structure, the ionic conductivity can be increased, and the mechanical strength and the high-temperature dimensional stability can be improved; the lithium ion transference number is increased, the polarization is reduced, and the battery rate capability is improved; the oxidation stability of the electrolyte is improved; the decomposition reaction of polyether at high temperature is inhibited; the thermal stability and the flame retardant property of the polymer electrolyte are remarkably improved, so that the safety of a solid-state battery is improved.

The invention relates to the technical field of preparation of building external wall thermal insulation materials, in particular to a building external wall thermal insulation board based on pearl wool and a preparation method of the building external wall thermal insulation board. The core layer is prepared from the following raw materials in parts by weight: 40 to 60 parts of pearl wool particles, 5 to 15 parts of graphene-loaded expanded graphite, 3 to 10 parts of nano silicon dioxide aerogel, 10 to 20 parts of ammonium polyphosphate, 5 to 12 parts of pentaerythritol, 3 to 8 parts of melamine, 15 to 25 parts of ethylene-vinyl acetate copolymer, 5 to 10 parts of maleic anhydride grafted polyethylene, 2 to 6 parts of nano montmorillonite and 1 to 5 parts of silicon carbide whisker; the composite material is prepared from the following components in parts by weight: 0.5-2 parts of a silane coupling agent KH560, 0.2-0.8 part of an antioxidant 1010, 3-8 parts of amino-terminated polyether and 0.3-1 part of a hindered amine light stabilizer 770. The thermal insulation board is excellent in thermal insulation, mechanical property and flame retardant property, good in weather resistance, stable in size and high in construction adaptability, pearl wool can be recycled, and the thermal insulation board has practical and environment-friendly values.

The invention discloses preparation and application of an environment-friendly P, N and Si synergistic flame retardant. According to the flame retardant (KDOPO-LDH (at) GO), a plurality of flame-retardant elements such as P, N and Si are integrated, so that an efficient synergistic flame-retardant system is constructed. Wherein the existence of the N element and the Si element effectively promotes the uniform dispersion of the flame retardant in an epoxy resin matrix; meanwhile, the unique molecular structure of the P-containing component endows the carbon-forming agent with excellent carbon-forming performance under a high-temperature condition. Through the synergistic effect of multiple elements, the flame retardant property of the epoxy resin is remarkably improved, and meanwhile, the good mechanical property of the material is effectively maintained. In addition, halogen-free and low-toxicity substances are mainly generated in the pyrolysis process of the flame retardant, and the green chemical concept is met.

The invention relates to the field of textile detection, and discloses a fabric flame retardance analysis method based on infrared thermal imaging sensing data, which comprises the following steps: performing non-contact temperature measurement on a fabric sample in a controlled heat shock disturbance field, acquiring an infrared imaging signal sequence, and performing energy projection rearrangement on the infrared imaging signal sequence; based on the discontinuous change of the energy flow density in the primary thermal behavior field, establishing a boundary disturbance model of a local overheating region, and comparing the morphological difference between a thermal expansion path and a radiation energy attenuation region; mapping the heat potential difference of each region in the critical response diagram into an energy constraint state inside the material, and deducing time bias distribution of energy conduction; introducing a spectrum equalization function under time offset distribution, and executing asymmetric compensation on local abnormal points of the infrared response data; and based on the decomposition threshold dynamic trajectory, calculating a flame-retardant response equilibrium rate and an energy flow retention rate, and forming a flame-retardant performance evaluation index. The method has the advantage of improving the accuracy of flame retardant detection.

The lithium secondary battery comprises a positive electrode, a negative electrode, a diaphragm and a polymer electrolyte, the polymer electrolyte contains the flame-retardant microcapsule, the flame-retardant microcapsule has a core-shell structure, a copolymer material containing one or more of an amide group, an ester group and an ether group is taken as a shell layer, and a flame retardant is taken as a core; the rupture collapse temperature of the flame-retardant microcapsule shell material is 60-120 DEG C, the melting point of the flame retardant is 20-120 DEG C, and the rupture collapse temperature of the copolymer material is higher than the melting point of the flame retardant. The lithium secondary battery disclosed by the invention has excellent flame retardance, the flame-retardant microcapsule added in the lithium secondary battery can be broken and collapsed when the battery is in thermal runaway, and the flame retardant is quickly released, so that the thermal runaway is actively defended in advance from the interior of the battery, and the electrochemical performance of the battery is not reduced.

The invention discloses a large-current-carrying-capacity flexible power cable, which belongs to the technical field of cable preparation, is used for solving the technical problem that the flame retardant property and the mechanical property of the power cable need to be further improved in the prior art, and specifically comprises a cable core, a wrapping layer, an insulating layer and a sheath layer which are sequentially arranged from inside to outside. The preparation method comprises the following steps: preparing alkoxy silane containing a benzocyclobutene group, preparing flame-retardant particles by using a sol-gel method, preparing modified polyurethane by using modified polysiloxane and 2, 5-furandimethanol as soft segments, naphthalene diisocyanate as a hard segment and trimethylolpropane as a chain extender, and preparing the flame-retardant flame-retardant polyurethane. The linear low-density polyethylene, the MAH-g-PE, the modified polyurethane, the flame-retardant particles and the auxiliary additive are melted and extruded outside the wire core to form the insulating layer, so that the power cable is obtained, the flame-retardant property of the power cable is effectively improved, and the mechanical property and the current-carrying stability of the power cable are also improved.

The invention relates to the technical field of high polymer materials, and particularly discloses a fluoride-free halogen-free flame-retardant polycarbonate material and a preparation method and application thereof.The fluoride-free halogen-free flame-retardant polycarbonate material is prepared from, by weight, 70-90 parts of polycarbonate resin, 8-15 parts of phosphorus-nitrogen flame retardant and 3-8 parts of silicon flame-retardant synergist, the composite material is prepared from the following raw materials in parts by weight: 20-30 parts of polypropylene, 2-5 parts of nano reinforcing filler, 0.1-0.5 part of hindered phenol antioxidant, 0.1-0.5 part of phosphite ester antioxidant and 0.1-0.5 part of pentaerythritol stearate. Through the synergistic effect of the composite flame-retardant system and the nanofiller, high flame retardance (UL94 V-0 level, 1.5 mm thickness), high heat resistance (the heat distortion temperature is greater than or equal to 130 DEG C) and excellent mechanical property are realized, the control is easy, the processing is stable, good balance of flame retardance and mechanical property is achieved on the premise of environmental protection, and the composite flame-retardant material is suitable for the fields of high-end household appliances and consumer electronics.

The invention discloses a phosphorus-sulfur synergistic flame retardant with high gas phase activity, a durable flame-retardant nylon fabric and a preparation method of the flame-retardant nylon fabric, and relates to the technical field of flame-retardant nylon fabric preparation.The preparation method of the phosphorus-sulfur synergistic flame retardant comprises the steps that 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and polyepoxide are mixed and heated to be molten for a reaction, and the phosphorus-sulfur synergistic flame retardant is obtained; obtaining an intermediate after the reaction is finished; the intermediate and a thiophenethiol derivative are subjected to a click chemical reaction, and a 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide derivative containing phosphorus and sulfur is obtained; the preparation method comprises the following steps: dissolving a 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide derivative containing phosphorus and sulfur into a mixed solvent of ethanol and water, so as to obtain the phosphorus-sulfur synergistic flame retardant with high gas phase activity. The raw materials are safe and environmentally friendly, the preparation method is simple, and the prepared flame-retardant nylon fabric is excellent in flame retardance and washing resistance and free of pollution in the using process.

The invention relates to a degradable composition and flame-retardant degradable plastic. The degradable composition comprises PLA particles, modified lignin and a bio-based flame retardant, wherein the modified lignin is obtained by grafting polycaprolactone on lignin and then forming a core-shell structure on the surface of silane coupling modified calcium carbonate; the preparation method of the bio-based flame retardant comprises the following steps: heating and dissolving chitosan in an acetic acid solution, introducing nitrogen, adding an initiator, then adding a DOPO derivative with double bonds at the tail end, MDO and AA, and carrying out a polymerization reaction to prepare the flame retardant. According to the scheme, the lignin-PCL / calcium carbonate core-shell toughening agent and the P-N synergistic chitosan flame retardant are prepared and are jointly added into the PLA, the compatibility with the PLA is good, the problem of high brittleness of the PLA can be effectively solved, the elongation at break is improved, meanwhile, the material is endowed with flame retardance, and the biodegradability of the PLA material can be well kept.

The invention discloses two-component addition type low-density liquid foaming silicone rubber and a preparation method thereof, and belongs to the technical field of silicone rubber preparation. Comprising a component A and a component B, the component A is prepared from the following components in parts by weight: 50 to 70 parts of vinyl terminated polysiloxane, 10 to 20 parts of vinyl hydroxyl silicone oil, 0.5 to 2 parts of platinum catalyst, 15 to 25 parts of HGM (at) PN-rGO / APP and 3 to 8 parts of methyl vinyl MQ resin; the component B is prepared from the following components in parts by weight: 50 to 60 parts of vinyl-terminated polysiloxane, 8 to 15 parts of hydrogen-terminated hydrogen-containing silicone oil, 10 to 20 parts of methyl-terminated hydrogen-containing silicone oil, 5 to 10 parts of hydroxyl-terminated silicone oil, 0.002 to 0.01 part of an inhibitor, 10 to 20 parts of fumed silica and 1 to 3 parts of a tackifier. The synergistic components in the HGM-coated PN-rGO / APP can greatly improve the flame retardant property of the silicone rubber, improve the compression strength and reduce the heat release rate at the same time.

The invention provides copolymerized flame-retardant nylon containing nitrogen and phosphorus as well as a preparation method and application of the copolymerized flame-retardant nylon. The copolymerized flame-retardant nylon containing nitrogen and phosphorus is formed by copolymerizing a structural unit I and lactam or copolymerizing the structural unit I, diamine and binary acid, the nitrogen and phosphorus-containing copolymerized flame-retardant nylon belongs to a halogen-free flame-retardant environment-friendly high polymer material and is intrinsic flame-retardant nylon, so that the problems of flame retardant migration, compatibility with a base material and the like do not exist, excellent flame-retardant performance can be achieved under the condition of relatively low introduction amount of a flame-retardant structural unit, and meanwhile, excellent mechanical property and spinnability can be kept.

The present disclosure provides a heat absorber with a low heat absorption starting temperature and excellent heat absorption amount, flame retardancy, and cushioning properties, and a secondary battery module including the heat absorber. The heat absorber includes a bag configured to be filled with a content, and a hydrogel to fill the bag as the content. The hydrogel has a three-dimensional network structure and is synthesized using a water-soluble organic monomer as a reaction material. The heat absorber is useful, in particular, as a heat absorber for secondary batteries.

The invention provides a preparation method of high-performance polyacrylonitrile pre-oxidized fibers, and belongs to the technical field of preparation of carbon filaments from polyacrylonitrile. The preparation method comprises the following steps: adding hydroxylated carbon nanotubes into deionized water, performing ultrasonic dispersion, adding a modifier and a catalyst, continuing ultrasonic dispersion, heating to 80-90 DEG C, performing constant-temperature reaction, fully washing with water, and drying to obtain modified carbon nanotubes; dispersing the modified carbon nanotube in an N, N '-dimethylformamide solution, adding an acrylonitrile monomer, hydroxyethyl acrylate and an initiator, copolymerizing to form a carbon nanotube / acrylonitrile copolymer, and spinning to obtain a carbon nanotube / acrylonitrile copolymer fiber; the carbon nano tube / acrylonitrile copolymer fiber is placed in a microwave treatment device, and a plurality of microwave generators are arranged in the microwave treatment device and are used for carrying out segmented pre-oxidation on the carbon nano tube / acrylonitrile copolymer fiber. The problems that an existing polyacrylonitrile fiber pre-oxidation technology is high in energy consumption and low in strength, poor in flame retardance and the like due to the difference between internal and external pre-oxidation effects can be solved.

The invention discloses a bionic anti-drag protective film based on a surface micro-nano structure and a preparation method of the bionic anti-drag protective film, and relates to the technical field of anti-drag film preparation. According to the preparation method, the high-strength nitrogen-containing thermoplastic polyurethane film layer with the flame retardant property is prepared, one layer is coated with the hyperbranched polyurethane coating, the drag reduction functional layer with the microstructure is formed through embossing and photo-thermal dual curing, and the hyperbranched polyurethane coating can form a high-density cross-linked network during curing, so that the drag reduction performance is improved; according to the present invention, the hyperbranched polyurethane coating material has characteristics of good mechanical property and good weatherability, the hyperbranched structure can assist in dispersion of shrinkage stress and maintenance of coating surface flatness during heating, and the hyperbranched polyurethane coating material further contains nitrogen rings so as to provide the coating material with certain fire resistance.