1298results about "Fire extinguisher" patented technology

A long-term fire retarding biochemical liquid composition including: a dispersing agent realized in the form of a major amount of water, for dispersing alkali metal ions dissolved in the water; a major amount of a first fire retarding agent realized in the form of a primary alkali metal salt of a nonpolymeric saturated carboxylic acid, for example, tripotassium citrate, for providing metal potassium ions dispersed in the water when the at least one alkali metal salt is dissolved in the water to form a mixed retardant solution; a minor amount of a second fire retarding agent realized in the form of a secondary alkali metal salt of a nonpolymeric saturated carboxylic acid, for example, potassium, sodium, calcium and / or magnesium benzoate, for providing benzoate ions dispersed in the water when the secondary alkali metal salt is dissolved in the mixed retardant solution, for functioning as a secondary fire retardant agent.

The invention relates to a novel thermosensitive self-crosslinking hydrogel fire extinguishing agent and a preparation method thereof, belongs to the technical field of fire extinguishing agents, and solves the problems that in the prior art, a traditional water-based fire extinguishing agent is poor in surface adhesive force on combustible materials and low in fire extinguishing efficiency; and the gel type fire extinguishing agent is high in viscosity and difficult to convey and spray. The invention provides a novel thermosensitive self-crosslinking hydrogel fire extinguishing agent. The fire extinguishing agent is prepared from the following components in percentage by mass: 0.5 to 1.5 percent of modified carboxymethyl cellulose (E-CMC), 4 to 8 percent of polyethylene glycol (PEG), 5 to 30 percent of water-soluble flame retardant and pure water serving as a solvent. The fire extinguishing agent is good in fluidity at normal temperature, the viscosity is remarkably improved at 90 DEG C, the fire extinguishing agent can be attached to the surface of combustible materials easily, the fire extinguishing effect is good, and reburning is not prone to occurring; wherein the viscosity of the fire extinguishing agent corresponding to 1.0 wt% of E-CMC and 6wt% of PEG at normal temperature is less than 1600cp, the viscosity at 90 DEG C is more than 42000cp, and the fire extinguishing agent is suitable for fire extinguishing work of class-A fire disasters.

The invention discloses an aerogel fire extinguishing agent for fire fighting, a fire extinguishing device and a releasing method.The aerogel fire extinguishing agent for fire fighting is prepared from, by mass, 8-12 parts of silicon dioxide aerogel powder, 40-45 parts of perfluorohexanone, 1.5-2 parts of zinc molybdate, 0.8-1.2 parts of nano cerium oxide, 2-3 parts of hyperbranched polysiloxane and 0.2-0.3 part of 18-crown-6 ether. Solid-phase silicon dioxide aerogel powder is matched with liquid-phase perfluorohexanone, zinc molybdate, nano cerium oxide, hyperbranched polysiloxane, 18-crown-6 ether and the like are compounded to serve as auxiliaries, efficient fire extinguishing can be conducted on precise electrical elements, residues are few, loss of instruments and equipment is small, and the fire extinguishing agent is suitable for being applied to the electrical field.

The present invention discloses a perfluoromethylcyclohexanone microcapsule fire extinguishing medium and its preparation process, which relates to the field of fire fighting technology. A perfluoromethylcyclohexanone microcapsule fire extinguishing medium is composed of a core material and a shell material. The core material includes perfluoromethylcyclohexanone, silicon dioxide, and azobisisobutyronitrile. The shell material includes modified guar gum, acrylic resin, aluminum hydroxide, potassium nitrate, and an emulsifier. The modified guar gum is prepared by the following method: tetrahydrofuran, guar gum, and triethylamine are sequentially added into a reactor, stirred and mixed evenly, and then a tetrahydrofuran solution of diphenylphosphinyl chloride is added dropwise. After the addition is completed, the temperature is raised to 75-85°C and the reaction is carried out for 10-14 hours, followed by post-treatment to obtain diphenylphosphinyl chloride-modified guar gum. The present invention modifies guar gum with diphenylphosphinyl chloride and then uses the modified guar gum for the shell material of perfluoromethylcyclohexanone microcapsules, improving the fire extinguishing performance, heat resistance, and long-term stability of perfluoromethylcyclohexanone microcapsules.

The invention relates to the field of battery fire extinguishing agents, in particular to a hydrogel fire extinguishing agent for battery fire and a preparation method of the hydrogel fire extinguishing agent. The hydrogel fire extinguishing agent for the battery fire disasters has viscosity variability, the components of the fire extinguishing agent are screened and compounded, the thermal reversible gel and the thermal irreversible gel are added, and the slow carbon forming gel and the water-retaining agent glycerinum are further added; the hydrogel fire extinguishing agent is in a flowing state with high viscosity and high flowability at normal temperature, and the inactivator is quickly converted into a gel state with high adhesion and non-flowability when encountering high temperature, so that the use of the hydrogel fire extinguishing agent is facilitated; and the hydrogel fire extinguishing agent can be ensured to cover the battery in fire for a long time to prevent the battery from reburning.

The invention discloses forest steppe fire extinguishing barrier foam and a preparation method thereof.The foam is prepared from 5%-20% of a material A, 0.5%-0.8% of a material B, 1.8%-3% of a coagulant and the balance water through a foam generation system; the material A is prepared from 1 to 10 parts of organic aggregate and 100 to 200 parts of inorganic aggregate; the material B is composed of 2-7 parts of a composite surfactant and 1-6 parts of a cross-linking agent; the coagulant is carbon dioxide gas. The inorganic aggregate is condensed under the action of hydrogen ions generated by dissolution of carbon dioxide to form colloidal particles, the colloidal particles are polymerized and crosslinked with the organic aggregate to form a gel skeleton of a three-dimensional network structure, the foam is converted into gel foam, and a heat-insulating and anti-burning barrier layer is formed on the surface of a combustible. The fire extinguishing agent is high in fire extinguishing efficiency, good in heat insulation effect and environment-friendly, and has wide application prospects in forest and grassland fire disasters.

The invention discloses a temperature-responsive microcapsule fire extinguishing material as well as a preparation method and application thereof. The temperature-responsive microcapsule fire extinguishing material comprises a core structure and a shell structure, wherein the shell structure coats the core structure; the core structure comprises a fluorine-containing fire extinguishing agent; the shell structure comprises a high polymer material, a nano compound, a surfactant and a curing agent. According to the perfluorohexanone microcapsule fire extinguishing material, intelligent response release is achieved, the explosion temperature range can be precisely regulated and controlled to be 90-130 DEG C according to the applicable scene, it is ensured that the fire extinguishing agent is released at the critical moment, and the problem of too early or too late release is avoided.

The invention belongs to the field of novel fire extinguishing agents, and particularly relates to a preparation method of a temperature response type hydrogel fire extinguishing agent, which comprises the following steps: dissolving and uniformly mixing a temperature-sensitive agent, a flame retardant, a gelling agent and a cross-linking agent in water, and then adding an initiator to obtain a fire extinguishing aqueous solution; during fire extinguishing, an ignition point is heated to trigger the fire extinguishing water aqua to be gelatinized to cover the surface of a fire source, so that the effects of quickly cooling and isolating oxygen are achieved, and the fire extinguishing purpose is achieved. According to the hydrogel fire extinguishing agent, the gelation time can be adjusted by adjusting the concentration and temperature change of the flame retardant, the hydrogel fire extinguishing agent has very high flowability in a normal temperature state, resistance in a pipeline is reduced, the problem of pipeline blockage is further solved, and the hydrogel fire extinguishing agent has the advantages of being easy to prepare, convenient to use, high in fire extinguishing efficiency, resistant to after-combustion, low in smoke production rate, easy to clean after disasters and the like.

The invention relates to the technical field of fire prevention, in particular to a multi-core fire extinguishing microcapsule and a preparation method thereof. The multi-core fire extinguishing microcapsule provided by the invention comprises a microcapsule A, a shell material of the microcapsule A is melamine resin A, and a core material of the microcapsule A is a mixture of a microcapsule B and a fire extinguishing agent A; the shell material of the microcapsule B is melamine resin B, and the core material of the microcapsule B is a fire extinguishing agent B. The outer wall of the large-particle-size multi-core microcapsule is thin, a part of the fire extinguishing agent A is released at a relatively low temperature, the fire can be prevented from happening by timely cooling when the temperature rises and a fire risk occurs, and the inner small-particle-size microcapsule B can be broken and released at a relatively high temperature, so that the subsequent fire extinguishing performance failure caused by releasing a large amount of the fire extinguishing agent at one time at a certain temperature is avoided; and the fire extinguishing cycle use frequency is increased, and the requirements of more fire extinguishing scenes can be met.

The invention relates to a bio-based degradable UV-curable coating material for a microcapsule fire extinguishing agent, the microcapsule fire extinguishing agent and a preparation method and application of the bio-based degradable UV-curable coating material for the microcapsule fire extinguishing agent. The bio-based degradable UV-curable coating material for the microcapsule fire extinguishing agent is prepared from the following components in parts by weight: 100 parts of bio-based hyperbranched polyurethane / acrylate prepolymer; 10-150 parts of a reactive flame-retardant monomer, 0.1-5 parts of a photoinitiator and 0-70 parts of a solvent. The coating material for the microcapsule fire extinguishing agent is a thermal response type material, when the coating material is prepared into a shell layer of the microcapsule fire extinguishing agent and the environment temperature reaches a preset threshold value, the shell layer is rapidly broken due to thermal expansion coefficient difference and chemical bond fracture, internal fire extinguishing liquid is released, the process can be completed within 3 seconds or less, rapid response in the initial stage of a fire disaster is ensured, and fire extinguishing efficiency is improved. The thermal response speed is high, the microcapsule fire extinguishing agent can be rapidly broken in the early stage of a fire, rapid release of fire extinguishing liquid is achieved in the early stage of the fire, efficient fire extinguishing is achieved, a fire source is controlled in time, and fire spreading is effectively prevented.

The invention relates to the technical field of lithium ion battery fire extinguishing agents, in particular to a lithium ion battery fire extinguishing agent and a preparation process. The preparation process comprises the following steps: S1, biomass pretreatment: mixing 40-50 parts of chitin powder with a 2wt% sodium hydroxide solution according to a mass volume ratio of 1: 10, stirring at 60 DEG C for 1-2 hours, and centrifuging and freeze-drying to obtain a chitin crude product; dispersing the chitin crude product in deionized water, and carrying out ultrasonic treatment to obtain a cellulose suspension with the solid content of 1%; s2, cellulose modification: adding 15-20 parts of povidone into the cellulose suspension, and mixing and stirring at 60 DEG C for 1 hour to obtain a modified cellulose suspension; s3, introducing nano silicon dioxide; s4, preparing modified gel; and S5, cross-linking and drying.

The invention discloses a perfluorohexanone fire extinguishing agent and a preparation method and application thereof.The perfluorohexanone fire extinguishing agent is prepared from, by mass, 60-70 parts of perfluorohexanone microcapsules, 10-20 parts of aluminum hydroxide, 6-10 parts of graphite, 5-10 parts of titanium dioxide, 4-8 parts of ultraviolet absorbent, 2-6 parts of ammonium polyphosphate, 3-6 parts of calcium oxide, 1-3 parts of fumed silica, 1-3 parts of nano-silica and 1-3 parts of trimethyl phosphate. According to the formula and process of the fire extinguishing agent, through triple technical innovation of shell layer modification, nano compounding and supercritical deposition, the breakthrough of efficient explosion suppression, long-acting anti-after-combustion, low toxicity and environment friendliness of the fire extinguishing agent is achieved, and the industrial popularization potential is achieved.

The invention relates to the technical field of explosion suppression, in particular to a composite powder explosion suppressant and a design method and a preparation method thereof. The composite powder explosion suppressant is prepared from the following components in parts by mass: 20 to 25 parts of aluminum oxide, 10 to 20 parts of magnesium oxide, 20 to 30 parts of silicon dioxide, 1 to 3 parts of cerium oxide, 10 to 15 parts of potassium bicarbonate, 10 to 15 parts of sodium bicarbonate, 3 to 8 parts of gas-phase hydrophobic white carbon black and 2 to 6 parts of talcum powder. The composite powder explosion suppressant disclosed by the invention is high in explosion suppression efficiency; the metal oxide component screened through quantum chemistry calculation has good explosion suppression performance, and all the components in the composite powder explosion suppressant have a synergistic effect, so that hydrogen explosion can be effectively inhibited.

The present invention provides a fire extinguishing sheet suitable for productivity, mass production, and large-scale production, wherein the fire extinguishing sheet can be used in places, facilities, structures, etc., where a fire may occur, and has an initial fire extinguishing function. The fire extinguishing sheet according to the present invention contains a fire extinguishing agent that when a predetermined temperature is reached, thermally decomposes to generate a fire extinguishing component.

The invention discloses a new energy battery topological insulator fire extinguishing system and a chain reaction suppression method, and the fire extinguishing system comprises a detection module arranged in a battery module; the composite tank is internally provided with a topological insulator composite material, and the topological insulator composite material is a Bi2Te3-coated PFPE compound; and the high-pressure directional release device is connected with the composite tank. According to the invention, the Bi2Te3-coated PFPE compound is injected into the battery module through the high-pressure directional release device, so that a thermal runaway chain reaction can be effectively blocked, secondary reburning is avoided, and the use safety of a new energy battery is greatly improved.

The invention belongs to the technical field of fire-extinguishing building materials, and discloses a microencapsulated efficient automatic fire-extinguishing patch and a preparation method thereof.The fire-extinguishing patch contains a fire-extinguishing microcapsule, the fire-extinguishing microcapsule is of a double-layer structure, the inner layer contains gelatin, kaolin, perfluorohexanone, sodium hexametaphosphate, resorcinol and glutaraldehyde, and the outer layer contains gelatin, kaolin, perfluorohexanone, sodium hexametaphosphate, resorcinol and glutaraldehyde; and the outer layer comprises a vinylidene fluoride-acrylic acid copolymer and glutaraldehyde. According to the invention, the flaky kaolin is used for enhancing the formaldehyde-free phenolic aldehyde inner layer and the vinylidene fluoride-acrylic acid copolymer outer layer to form a double-layer shell layer with high air tightness, so that the compactness and long-term stability of the shell layer of the microcapsule are greatly improved.

The invention discloses a double-shell-layer fire extinguishing microcapsule. The double-shell-layer fire extinguishing microcapsule comprises a core material, a first shell layer and a second shell layer, wherein the core material is coated with the first shell layer, and the first shell layer is coated with the second shell layer. By optimizing the components of the core material, reducing the volatility of the core material, improving the coating rate and arranging the double-layer microcapsule structure, the first shell layer can be formed under the low-temperature condition and is excellent in compactness, escape of the core material in the reaction can be effectively reduced, the coating rate and the yield of the microcapsule are further improved, and after full crosslinking, the product yield is improved. The second shell layer can further improve the mechanical performance of the microcapsule, the hydrophobicity and compactness of the second shell layer are beneficial for preventing polyurea and melamine resin from absorbing water and deliquescing and preventing formaldehyde harmful substances from being continuously released, the safety of the microcapsule is improved, and the microcapsule has a wider application scene and can quickly respond to the fire temperature.

The present invention relates to an all-solid-state battery. The all-solid-state battery comprises a solid electrolyte layer comprising: a non-woven fabric formed of nanofibers; and a solid electrolyte filled in the non-woven fabric, wherein the nanofiber includes a fire extinguishing solution core and a polymer shell having a melting point (Tm) of 100-180 °C, and the amount of the non-woven fabric is 5-10 wt% on the basis of the total 100 wt% of the solid electrolyte layer.

The invention discloses wide-temperature-range self-repairing gradient ceramic fire extinguishing foam, a preparation method and application of the foam in an electrochemical energy storage device, and belongs to the technical field of new energy battery safety. Aiming at the technical bottleneck of a traditional fire extinguishing material in coping with a thermal runaway fire disaster of an electrochemical energy storage device, the defects of an existing material in the aspects of extreme temperature adaptability, electrolyte compatibility and long-acting flame retardance are overcome through unique three-layer gradient structure design and material innovation; the technical bottlenecks of wide temperature range stability, an intelligent response mechanism and after-combustion blocking capacity are broken through, the ultra-wide temperature range structural stability from-50 DEG C to 1600 DEG C is achieved, millisecond-level response to different electrolytes is achieved, and a self-repairing barrier after fire extinguishment can be built. The innovation point is that the gradient ceramic structure design, the dynamic response mechanism and the self-repairing circulating system are adopted, so that the equal-depth fire reignition rate of the lithium battery can be obviously reduced, and the application prospect is wide.

The invention relates to the technical field of fire extinguishing microcapsules, in particular to a high-airtightness perfluorohexanone fire extinguishing microcapsule and a preparation method and application thereof.The perfluorohexanone fire extinguishing microcapsule comprises a composite shell layer and a fire extinguishing core, and the composite shell layer is made of ethylene-vinyl alcohol copolymer resin and silicon dioxide nanoparticles; the fire extinguishing core is a perfluorohexanone fire extinguishing agent and is applied to preparation of indoor fire extinguishing pastes, fireproof coatings and polyurethane adhesive materials. According to the perfluorohexanone fire extinguishing microcapsule disclosed by the invention, the diffusion of low-polarity perfluorohexanone is effectively prevented by utilizing the strong hydrogen-bond interaction between hydroxyl groups in the ethylene-vinyl alcohol copolymer resin, and especially under the condition of relatively high temperature, the perfluorohexanone fire extinguishing microcapsule has a good fire extinguishing effect. The problem that an existing perfluorohexanone fire extinguishing microcapsule is poor in long-term air tightness under the condition of high encapsulation efficiency is effectively solved, and meanwhile harmful substances such as formaldehyde cannot be generated.

The invention provides energy storage battery immersed cooling liquid based on fluorinated nanofluid and a preparation method, and belongs to the technical field of heat management of energy storage equipment, the energy storage battery immersed cooling liquid comprises 74-84% of perfluoropolyether base liquid, 10-15% of surface modified boron nitride nanosheets, 5-8% of microencapsulated perfluorohexanone and 1-3% of polydimethylsiloxane modified silicon dioxide. Microencapsulated perfluorohexanone is integrated into the cooling liquid to achieve the dual functions of heat dissipation and fire extinguishment, and synergistic effects are generated in the aspects of heat conduction, insulation, fire extinguishment and the like through combined use of the perfluoropolyether base liquid, the surface modified boron nitride nanosheets, the microencapsulated perfluorohexanone and polydimethylsiloxane modified silicon dioxide and specific modification performance of the perfluoropolyether base liquid, the surface modified boron nitride nanosheets, the microencapsulated perfluorohexanone and the polydimethylsiloxane modified silicon dioxide. And experimental data can prove that the comprehensive performance of the material has substantive features and remarkable progress in the aspects of heat conductivity coefficient improvement, fire extinguishing time and the like.

A solid gel foam fire extinguishing agent includes a material A and a material B; the material A includes the following components in mass percentage: 18% to 25% of an inorganic silicate, 0.25% of sodium carboxymethyl cellulose, 0.25% of sodium alginate, 0.1% to 0.5% of xanthan gum, 0.5% to 1% of polyvinyl alcohol, 0.5% to 1.5% of sodium lauryl sulfate, 0.01% to 0.05% of dodecanol, 0.005% to 0.01% of disodium ethylenediaminetetraacetate, and water as a balance; and the material B includes the following components in mass percentage: 25% of sodium dihydrogen phosphate, 25% of acetic acid, 1% to 1.5% of fatty alcohol polyoxyethylene ether, 0.1% to 0.5% of 3% aqueous film-forming foam, 0.01% to 0.05% of the dodecanol, and water as a balance. The fire extinguishing agent exhibits advantages including low density, low oil wettability, high resistance, high adhesiveness, and foam collapse-resistant properties in fire resistance.

The present invention relates to the technical field of fire extinguishing agents for lithium-ion batteries, and particularly to a non-ionic fine water mist heat runaway suppression fire extinguishing agent and its preparation method and application. The non-ionic fine water mist fire extinguishing agent comprises the following components in mass percentages: 5.0-15% of non-ionic surfactant, 0.3-0.5% of modified nanoparticles, 2.5-4.0% of bio-based thickener, 0.5-1.5% of flavonoid compounds, 15%-20% of organic solvent, and the balance being deionized water. The fine water mist fire extinguishing agent provided by the present invention uses a non-ionic surfactant, which can significantly reduce the surface tension of water, enabling the fine water mist to better wet the surface of the combustible, and adding modified nanoparticles, flavonoid compounds and bio-based thickener therein, achieving excellent flame retardancy and wettability, improving the overall performance of the fine water mist fire extinguishing agent, and the fire extinguishing agent composition contains neither inorganic salts nor fluorine, being green and environmentally friendly with high fire extinguishing efficiency.

The invention relates to the technical field of lithium ion battery fire extinguishing agents, and discloses a compound lithium ion battery fire extinguishing agent and a preparation method thereof.The compound lithium ion battery fire extinguishing agent is prepared from, by mass, 30-35 parts of vermiculite, 5-7 parts of fire extinguishing filler, 6-8 parts of modified zeolite, 0.5-1 part of a stabilizer, 1.5-2 parts of a dispersing agent, 1-2 parts of a thickening agent, 1-3 parts of a foaming agent and 40-50 parts of water. The fire extinguishing filler can form a barrier layer on the surface of the battery to prevent oxygen and heat transfer and achieve the fire extinguishing purpose, and starch and polydopamine in the fire extinguishing filler can form compact carbon layers, so that wrapped combustible molecules are distributed among the carbon layers, oxygen is further isolated, and the fire extinguishing efficiency is improved; the modified zeolite can complete fire extinguishing through a physical and chemical synergistic effect, and can form silicon dioxide to be distributed on the surface of the zeolite in the fire extinguishing process, so that the situation that the zeolite is subjected to thermal shock and thermal stress to cause collapse of a zeolite framework and influence the fire extinguishing performance is avoided.

The invention discloses an environment-friendly plant-based fire extinguishing agent as well as a preparation method and application thereof, and the environment-friendly plant-based fire extinguishing agent comprises the following components in percentage by weight: 1%-5% of metal salt, 1%-5% of a high nitrogen and phosphorus compound, 0.1%-3% of a surfactant, 0.01%-0.1% of a foam stabilizer and the balance of fireproof wood flour fermentation liquor, the fireproof wood powder fermentation liquor is obtained by adding 2%-5% lime water which is 2-5 times of the weight of the fireproof wood into fireproof wood powder to be soaked and fermented for more than 48 hours. The environment-friendly plant-based fire extinguishing agent provided by the invention is prepared by adopting fire-retardant forest plants as raw materials through fermentation, chelation and nanocrystallization treatment, has better anti-after-combustion and foaming effects, does not cause environmental pollution compared with a traditional flame-retardant fire extinguishing agent, and is biodegradable and safer.

The invention provides a perfluoroethanone microcapsule and a preparation method thereof, and belongs to the technical field of fire extinguishing materials, the perfluoroethanone microcapsule comprises a core and a shell layer; the core comprises perfluorohexanone and fumed silica; the shell layer comprises isophorone diisocyanate, diethylenetriamine and a chlorine-containing monomer, and the isophorone diisocyanate, the diethylenetriamine and the chlorine-containing monomer are subjected to an interfacial polymerization reaction to form a polyurea-polyurethane hybrid network; the mass ratio of the shell to the core of the microcapsule is 1: (5-20); the anhydrous microcapsule core is constructed through an oil-in-oil type anhydrous interfacial polymerization system, so that the hydrolysis side reaction is fundamentally avoided, the microcapsule has higher stable encapsulation efficiency, and the reliability and long-term effectiveness of the product in the storage and use processes are ensured.

The invention discloses a fire extinguishing microcapsule and a preparation method thereof, and belongs to the technical field of fire extinguishing. The fire extinguishing microcapsule comprises a capsule core and a capsule shell, wherein the capsule core comprises a water-based fire extinguishing agent and a fluorine-based fire extinguishing agent which are mutually insoluble; the capsule shell is coated outside the capsule core; wherein the mass ratio of the water-based fire extinguishing agent to the fluorine-based fire extinguishing agent is K1, and K1 is larger than or equal to 0.5 and smaller than or equal to 2. The fluorine-based fire extinguishing agent is preferentially gasified to break through the capsule shell to be released due to the characteristics of low boiling point and high vapor pressure so as to quickly block the chain reaction of combustion, the water-based fire extinguishing agent is secondarily released after being heated and expanded, continuous cooling is realized through vaporization heat absorption, self-driven staged release is realized by utilizing the physical property difference of the fluorine-based fire extinguishing agent and the water-based fire extinguishing agent, and the overall fire extinguishing efficiency of the fire extinguishing microcapsule is improved.

The invention discloses a temperature-sensitive hydrogel fire extinguishing agent for lithium ion battery fire fighting and a preparation method. The temperature-sensitive hydrogel fire extinguishing agent is prepared from 100 parts of water, 0.5-5 parts of cellulose ether, 0.5-10 parts of natural polysaccharide, 1-5 parts of a fire extinguishing aid, 0.05-1 part of a biodegradable surfactant, 0.05-0.5 part of a preservative, 0.5-5 parts of inorganic filler and 5-15 parts of a tackifier. The preparation method comprises the following steps: uniformly stirring water, cellulose ether, natural polysaccharide and inorganic filler in proportion at a high speed under a heating condition, after all the components are fully dissolved or uniformly dispersed, continuously adding the fire extinguishing additive, the biodegradable surfactant and the preservative in proportion, and uniformly stirring again to obtain a component A; dissolving polyvinyl alcohol in water at 90-95 DEG C to prepare an aqueous solution serving as a component B; the component A and the component B are mixed in proportion. The fire extinguishing agent is low in raw material price and simple in preparation process, and has the characteristics of good fire extinguishing effect, high after-combustion resistance, biodegradability and the like.

The invention provides a temperature-sensitive hydrogel additive, a preparation method thereof and a hydrogel fire extinguishing agent. The temperature-sensitive hydrogel fire extinguishing additive comprises the following raw materials: a temperature-sensitive substance, a thickening agent, a cross-linking monomer, an initiator and a cross-linking agent in a mass ratio of (0.3-1.7): (0.2-0.9): (2-10): (0.1-0.3): (0.01-0.05), the temperature-sensitive substance is methyl cellulose and / or carboxymethyl cellulose, the thickening agent is carboxymethyl chitosan and / or chitosan, and the cross-linking monomer is acrylic acid. The temperature-sensitive type hydrogel fire extinguishing agent additive for the lithium battery fire disasters solves the problems that an existing fire extinguishing agent is weak in cooling capacity, low in fire extinguishing efficiency, poor in adhesiveness, high in reburning rate, not environmentally friendly in material and the like when coping with the lithium battery fire disasters, and can rapidly release water to absorb heat and cool under the high-temperature condition; meanwhile, a compact closed film layer is formed on the surface of the battery to isolate oxygen from being in contact with electrolyte, so that reburning is effectively prevented.

The invention discloses a special gradient flame-retardant explosion suppressant for a high-energy-density ternary lithium battery, and relates to the technical field of safety protection of new energy batteries, the gradient flame-retardant explosion suppressant comprises the following components by mass: 30% of trimethyl phosphate, 16% of dimethyl methylphosphonate, 13% of triphenyl phosphate, 32% of a solvent, and 9% of a composite stabilizer; the compound stabilizer is prepared from 2, 6-di-tert-butyl-4-methylphenol, diisooctyl adipate and dibutyl sebacate according to the mass ratio of 2 to 1 to 1. The invention also provides a preparation method of the gradient flame-retardant explosion suppressant. Through formula optimization, especially adjustment of the composite stabilizer and reinforcement of a raw material pretreatment process, the explosion suppressant can be stably stored and operated within the range of-40 DEG C to 50 DEG C, the application limitation in extremely cold and high-temperature areas is solved, and the explosion suppressant is suitable for most of extreme temperature environments in the world.