306 results about "Perfluoropolyether" patented technology

The invention discloses a perfluoropolyether blended PEGDE-based solid electrolyte and a preparation method thereof, and belongs to the technical field of lithium metal battery solid electrolyte materials. Adding SnCl4 and TAA into the nanocellulose precursor solution, stirring, carrying out suction filtration, and drying to obtain a SnS2 (at) NC support layer; and mixing and stirring PEGDE, LiDFOB, LiTFSI and PFPE to obtain PEGDE-based solid electrolyte slurry, coating the SnS < 2 > (at) NC supporting layer with the PEGDE-based solid electrolyte slurry, and performing in-situ polymerization in a drying oven to obtain the PEGDE-based solid electrolyte. The ultrathin perfluoropolyether blended PEGDE-based solid electrolyte prepared based on PEGDE in-situ polymerization and perfluoropolyether blending and in combination with nanocellulose enhancement has the advantages of stable anode interface, high mechanical strength, high decomposition voltage and high ion transference number.

The invention provides chlorotrifluoroethylene continuously prepared based on a microchannel reactor and a preparation method of the chlorotrifluoroethylene, and the chlorotrifluoroethylene comprises the following raw materials in parts by weight: 1, 1, 2-trifluoro-1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 The low-temperature refrigerant refrigerant is prepared from the following components in parts by weight: 90 to 100 parts of 1, 2-trichloroethane, 1 to 5 parts of a zinc fluoride induced palladium-copper bimetallic catalyst, 8 to 15 parts of a cyclohexyl dimethyl ether-formic acid composite hydrogen donor, 0.5 to 2 parts of trifluoroacetic anhydride, 0.1 to 0.5 part of a perfluoropolyether lubricant, a proper amount of a low-temperature mixed refrigerant and 15 to 20 percent by weight of diluted hydrochloric acid. According to the invention, the preparation efficiency and product purity of chlorotrifluoroethylene can be improved, and stable operation of the preparation system and reasonable treatment of byproducts can be guaranteed.

The application discloses an aluminum alloy surface fine polishing polishing composition, polishing liquid and application thereof, and particularly belongs to the technical field of metal surface treatment. The polishing composition comprises the following components in mass fraction: 70-80 parts of silica sol, 1-4 parts of dispersing agent, 5-7 parts of surfactant, 5-10 parts of corrosion inhibitor, and 0.5-2 parts of water-retaining agent; and the surfactant is composed of perfluoropolyether, coconut oil alkylolamide and sodium dodecyl benzene sulfonate. The polishing composition provided by the application has high polishing efficiency, can reduce polishing cost, improve product quality, has low material surface roughness and few scratches after polishing treatment, effectively improves the polishing surface quality, improves the overall appearance and durability of the material, and the polishing liquid does not contain toxic substances such as chromium / phosphorus, and is environment-friendly.

The invention relates to the technical field of grinding fluid, in particular to efficient grinding fluid for an MPO connector, a preparation method and application of the efficient grinding fluid for the MPO connector. 27%-44% of alpha-aluminum oxide; 8%-15% of a styrene-maleic anhydride copolymer; 2%-5% of a modified polyurea solution; 0.05% to 0.3% of perfluoropolyether; 0.5%-2% of citric acid; 0.5%-1.5% of a polyether modified polysiloxane defoaming agent; by adopting a composite abrasive material system of the nano-diamond and the alpha-aluminum oxide, the grinding efficiency and the surface quality are improved in a breakthrough manner.

The invention relates to the technical field of high-end packaging and printing, and discloses a base material back coating and a preparation method thereof, and the base material back coating comprises the following components in parts by weight: 55-70 parts of mixed matrix resin formed by polar modified epoxy acrylate and perfluoropolyether acrylate according to a weight ratio of 4 / 1-9 / 1, according to the invention, self-stratification power generated by viscosity reduction in a heat leveling stage is utilized to drive the components to migrate directionally and construct a gradient interpenetrating network structure, so that the self-stratification effect is improved, and the self-stratification effect is improved; the coating is subjected to continuous chemical transition from the bottom anchoring layer to the surface shielding layer, interface stress concentration generated by physical layering is eliminated, and the interface bonding stability is improved on the premise that the protection strength of the ultrathin coating is guaranteed.

The invention relates to the technical field of organic-inorganic hybrid materials, in particular to an antifouling organic-inorganic hybrid material, a preparation method, a photocuring antifouling material and a product. The organic-inorganic hybrid material is prepared by carrying out a ring-opening addition reaction on an epoxy group of epoxy polyhedral oligomeric silsesquioxane and polydimethylsiloxane with an amino group or perfluoropolyether with a carboxyl group. According to the scheme provided by the invention, the coating has high thermal stability and structural rigidity endowed by epoxy polyhedral oligomeric silsesquioxane and excellent low surface energy antifouling property endowed by amino-containing polydimethylsiloxane or carboxyl-containing perfluoropolyether, and the defect that a pure epoxy polyhedral oligomeric silsesquioxane coating does not have antifouling property is effectively overcome.

The invention relates to the field of medical materials, and particularly discloses a collagen microsphere preparation method based on a micro-fluidic technology, and the preparation method comprises the following steps: preparing a micro-fluidic device which comprises a chip with a coaxial flow channel, a fluid control system and an ultraviolet crosslinking module integrated at the outlet of the chip; preparing an inner phase fluid, an intermediate phase fluid and an outer phase fluid, wherein the inner phase is a modified collagen solution containing a photoinitiator, the intermediate phase is a perfluoropolyether oil phase and contains a surfactant, and the outer phase is a water phase and contains a nonionic surfactant; the three-phase flow velocity is adjusted, and monodisperse W / O / W liquid drops are generated in the micro-fluidic chip; sequentially carrying out low-temperature physical crosslinking and ultraviolet-initiated crosslinking on the W / O / W liquid drops to form cured microspheres; collecting and post-processing the microspheres to obtain the collagen microspheres. According to the preparation method provided by the invention, the natural activity of collagen is reserved, meanwhile, the size of the microspheres is accurately controlled, multiple functions are integrated, and the preparation method is environment-friendly and safe.

The invention discloses a perfluoropolyether-terminated polymer, an electrolyte, a battery, a preparation method and an application, and belongs to the technical field of solid-state batteries, and the structure of the perfluoropolyether-terminated polymer is shown as a formula I. Through the structure of the multi-arm polyether, the crystallinity is obviously reduced, and the ionic conductivity is effectively improved. In addition, by grafting the perfluoropolyether chain segment, the dissolving property of the lithium salt can be further improved, the ion transference number can be increased, and meanwhile, the generation of LiF is facilitated, so that a good SEI interface is provided, and the generation of dendritic crystals is inhibited. Meanwhile, the oxidation resistance and the thermal stability of the polymer can be remarkably improved.

The invention discloses a perfluoropolyether-based polymer solid electrolyte film regulated and controlled by a mixed solvent as well as a preparation method and application of the perfluoropolyether-based polymer solid electrolyte film, and belongs to the field of organic polymer solid electrolyte preparation. Reacting under the action of an initiator and an RAFT (reversible addition-fragmentation chain transfer) reagent to obtain a perfluoropolyether-based copolymer; the method comprises the following steps: adding a perfluoropolyether-based copolymer into a polyvinylidene fluoride-hexafluoropropylene copolymer solution in which lithium salt is dissolved, the mass of the polyvinylidene fluoride-hexafluoropropylene copolymer accounts for 10%-30% of the mass of the polyvinylidene fluoride-hexafluoropropylene copolymer, the mass of the N, N '-dimethylformamide, the mass of the trifluorotoluene and the mass of the perfluoropolyether-based copolymer account for 10%-30% of the mass of the polyvinylidene fluoride-hexafluoropropylene copolymer, and the perfluoropolyether-based polymer solid-state electrolyte film is obtained by uniformly mixing and then preparing a film. And the comprehensive performance of the composite solid electrolyte serving as the film is improved.

The invention provides an ultraviolet-cured low-refractive-index UV resin and a preparation method thereof, and the preparation method comprises the following steps: A) mixing epoxy resin, fluorine-modified binary acid, a first catalyst, an antioxidant and a polymerization inhibitor, and carrying out a reaction to obtain a first product; b) mixing the first product, modified acrylate and a coupling agent, and reacting to obtain a second product; and C) mixing the second product with a modified acrylate monomer to obtain the UV-cured low-refractive-index UV resin. The perfluoropolyether and the silicon-containing hydroxyl acrylate are modified, so that the problems of poor compatibility, non-transparent paint film and the like caused by directly grafting the perfluoropolyether and the silicon-containing hydroxyl acrylate into a structural system are greatly improved, and the perfluoropolyether and the silicon-containing hydroxyl acrylate have obvious advantages in the application direction with requirements on the transparency of the paint film. The stability of the resin can be improved, so that the resin is not prone to gelling during production, and the problems of layering and the like are not prone to occurring during use.

Provided is a fluoropolyether-based curable composition which can be used for a longer time than in the prior art, can be cured at room temperature or heat-cured, and can form a cured product having reduced hardness and good mechanical and physical properties. The fluoropolyether-based curable composition contains (A) a fluorine-containing compound having at least two secondary amino groups in one molecule and having a divalent perfluoropolyether group in the main chain, and (B) a fluorine-containing compound having at least two epoxy groups in one molecule and having a monovalent or divalent perfluoropolyether group in the main chain in an amount such that the amount of the fluorine-containing compound is less than or equal to 1 mol per secondary amino group in the component (A), and the amount of the fluorine-containing compound is less than or equal to 1 mol per secondary amino group in the component (A). And the epoxy group in the component (B) is 0.5-5 mol.

The present invention pertains to a curable perfluoropolyether adhesive composition that contains: (A) 100 parts by mass of a straight-chain perfluoropolyether compound that has at least two alkenyl groups in one molecule, and that has, in the main chain, a perfluoropolyether structure including a repeating unit represented by —CaF2aO— (where a is an integer from 1-6); (B) in an amount effective for curing, a fluorine-containing organohydrogenpolysiloxane having, in one molecule, at least two hydrogen atoms to which a silicon atom is bonded; and (C) a catalyzing quantity of a hydrosilylation reaction catalyst. The composition does not contain an organic solvent. This configuration makes it possible to provide: a curable perfluoropolyether adhesive composition with which can be achieved a cured product that has excellent heat resistance, weather resistance, water repellency, oil repellency, chemical resistance, solvent resistance, etc., and that is characterized in particular in that voids are not generated on the surface of a coating film in a heating step; and an adhesive and adhesive tape that include said cured product.

The invention relates to a transfer printing template and a preparation method thereof. The transfer printing template comprises a base body, at least one part of the surface of the base body is provided with a texture layer, the surface of the side, away from the base body, of the texture layer is provided with a middle layer, and the surface of the side, away from the base body, of the middle layer is provided with a surface layer; the material of the middle layer comprises silicon dioxide, and the material of the surface layer comprises perfluoropolyether siloxane. According to the transfer printing template, the middle layer and the surface layer which are good in synergy are sequentially arranged on the surface of the texture layer, so that the demolding performance and the durability of the transfer printing template are remarkably improved.

The invention relates to the field of dielectric energy storage materials, and discloses a polyimide-based composite dielectric film material and a preparation method thereof.The dielectric film is prepared from, by mass, 4-20 parts of modified barium strontium titanate and 100 parts of fluorinated polyamide acid solution, the modified barium strontium titanate is prepared from the following raw materials: hydroxylated barium strontium titanate, 3-glycidyl ether oxypropyl trimethoxy silane, perfluoropolyether alcohol and a catalyst, and the fluorinated polyamide acid solution is prepared from the following raw materials: a fluorine-containing diamine monomer and a fluorine-containing dianhydride monomer; according to the technical scheme, the polyimide film dielectric film is prepared from fluorinated polyamide and modified silane barium strontium titanate, the dispersity of barium strontium titanate in a polyimide matrix is remarkably improved, the compatibility of barium strontium titanate and fluorinated polyimide is remarkably improved, and the dielectric energy storage performance of the dielectric film is remarkably improved; the hydroxylated barium strontium titanate is modified through the 3-glycidyl ether oxypropyl trimethoxy silane and the perfluoropolyether alcohol, so that the dielectric loss of the dielectric film is remarkably reduced.

The invention discloses a preparation method of sulfide solid electrolyte slurry, a preparation method of a positive plate, an all-solid-state battery and a preparation method of the all-solid-state battery. The method comprises the following steps: preparing modified perfluoropolyether oil by taking perfluoropolyether carboxylic acid as a raw material, and mixing the modified perfluoropolyether oil with lithium salt, a suspension stabilizing additive and sulfide electrolyte to prepare the slurry. The modified perfluoropolyether oil adopts asymmetric end group design, one end is an epoxypropyl ether group, and the other end is a cyano group. The modified perfluoropolyether oil is introduced as a protective medium and an ionic conduction enhancer of the sulfide electrolyte, so that the problems of air stability, space charge layer and high-voltage operation of the sulfide electrolyte are solved, the process is simple, the cost is low, and the method has a good industrial application prospect. According to the all-solid-state battery disclosed by the invention, the gel-state ion conduction layer is formed between the positive plate and the electrolyte layer, and the gel-state ion conduction layer has high viscoelasticity and can keep good solid-solid interface contact under a relatively low external pressure condition.

The application discloses a method for purifying functionalized perfluoropolyether by complex extraction, comprising the following steps: dissolving a mixture containing non-functionalized perfluoropolyether and functionalized perfluoropolyether in a fluorine-containing organic solvent to obtain a raw material solution; contacting the raw material solution with a complex extraction agent; after extraction equilibrium, collecting a fluorine-containing organic solvent phase and concentrating to obtain non-functionalized perfluoropolyether; collecting a complex extraction agent phase and concentrating to obtain functionalized perfluoropolyether; at least one end group of the functionalized perfluoropolyether is -COOH, -CH2OH, -CH2SH or -NH2; the complex extraction agent is a mixed solution of an amine compound and a strong polar protic solvent, or a mixed solution of at least one of a carboxylic acid compound and a sulfonic acid compound and a strong polar protic solvent; and the strong polar protic solvent is one or more of methanol, ethanol, ethylene glycol, isopropanol, n-butanol and water.

The invention discloses a polysiloxane silicone rubber waterproof coating and a preparation method thereof, and relates to the technical field of coating preparation. The polysiloxane silicone rubber waterproof coating at least comprises the following raw materials in parts by mass: a component A: 50-60 parts of vinyl-containing perfluoropolyether-b-polysiloxane; 10 to 15 parts of a hydrophobic modified binder; 6-8 parts of low surface energy modified silicon dioxide; 3 to 5 parts of tetramethyl tetravinyl cyclotetrasiloxane; a component B: 10-20 parts of vinyl phenyl silicone resin; 5-8 parts of hydrogen-containing silicone oil; 0.2 to 0.4 part of a platinum catalyst; and 0.05 to 0.1 part of an inhibitor. The polysiloxane silicone rubber waterproof coating prepared by the invention is suitable for long-term protection of various substrates, has high adhesive force, and particularly has waterproofness and mechanical wear resistance.

The present application relates to a kind of diaphragm and its preparation method and electric device.The diaphragm includes base film, and the base film includes opposite first surface and second surface along the thickness direction;The first surface is provided with first coating, and the first coating includes polycaprolactone, metal oxide catalyst and bismuth-tin eutectic alloy;The second surface is provided with second coating, and the second coating includes core-shell material, and the core-shell material includes inner core and polymer shell, and the inner core includes perfluoropolyether and azobisisobutyronitrile;The base film includes polyether ether ketone and polyphenylene sulfide.The diaphragm provided by the present application uses polyether ether ketone and polyphenylene sulfide as mixed base film, and the first coating and the second coating are differentially set, the diaphragm heat response is sensitive, effectively prevent the occurrence of thermal runaway, the safety performance of lithium ion battery is significantly improved, meanwhile, the energy density of battery has also been greatly improved, and the cycle performance of battery is good.

The invention discloses an anti-static and anti-abnormal-sound coating for a durable automobile sealing strip and a preparation method of the anti-static and anti-abnormal-sound coating in the field of functional coating materials. The coating is prepared from hydroxy acrylic resin, two special functional fillers, auxiliaries and a solvent. Wherein the vinyl functionalized polypyrrole-silver nanowire hybrid conductive fiber provides a lasting static dissipation path, and the epoxy siloxane grafted perfluoropolyether solid lubricating particles provide long-acting lubrication through chemical bonding so as to eliminate abnormal sound. When the coating is prepared, the resin and the adhesion promoter are dissolved in the mixed solvent to form a resin liquid, then the two functional fillers and the lubricating additive are added after being pre-dispersed, and finally the mixture and the cross-linking agent are mixed and cured. The coating is firmly attached to the surface of the sealing strip through chemical bonding and endows the sealing strip with stable and lasting anti-static, noise-reducing and wear-resisting performance, and the process is simple and convenient and suitable for large-scale production.

This invention discloses a high-wear-resistant polytetrafluoroethylene (PTFE) membrane material and its preparation method, relating to the field of PTFE membrane material technology. The high-wear-resistant PTFE membrane material prepared by this invention includes PTFE, wear-resistant filler, lubricant, and composite surfactant. The composite surfactant is obtained by reacting maleic acid derivatives with polyethylene glycol derivatives. The maleic acid derivative is obtained by reacting hydroxyethyl methacrylate, styrene, silane coupling agent KH570, POE, and maleic anhydride. The polyethylene glycol derivative is obtained by reacting 4-imidazolium formaldehyde with mono-amino-terminated polyethylene glycol. This process improves wear resistance while giving the PTFE membrane anti-fouling properties. The wear-resistant filler is obtained by reacting brominated cyclohexylmethyl dimethoxysilane with nano-silica, followed by coating with a perfluoropolyether block copolymer. This process improves wear resistance while the introduced perfluoropolyether further enhances anti-fouling properties.

The present invention provides a hard coat forming material having both excellent durability such as scratch resistance and abrasion resistance and excellent sliding properties. The solution is a curable composition comprising: (a) a reactive energy ray-curable multifunctional monomer; (b) a perfluoropolyether having a reactive energy ray-polymerizable group at the end of a molecular chain comprising a poly(oxyperfluoroalkylene) group (wherein the perfluoropolyether of (c) below is excluded); (c) a perfluoropolyether having a molecular weight of 1000 or more and a group represented by Formula [1], Formula [2] or Formula [3] described below at the end of a molecular chain comprising a poly(oxyperfluoroalkylene) group; and (d) a polymerization initiator that generates radicals by a reactive energy ray.

The application discloses a kind of perfluoropolyether nanocomposite grease and preparation method thereof, belong to the technical field of lubricating material.The lubricating grease includes perfluoropolyether base oil, polytetrafluoroethylene thickener and composite nano additive, wherein the composite nano additive is composed of surfactant modified antiwear additive, structure stabilizer, rust and oxidation inhibitor.Antiwear additive is one of nano copper, nano cerium oxide, nano titanium oxide and molybdenum sulfide, structure stabilizer is one of nano silicon oxide and porous alumina, and rust and oxidation inhibitor is nano zinc oxide.The composite nano additive is introduced in the form of perfluoropolyether oil phase dispersion, and is homogenized with thickener under the condition of 150~260℃ after dispersion and mixing.The application realizes the synchronous improvement of lubricating grease wear resistance, colloid stability, rust and oxidation resistance and oxidation stability through the synergistic effect of various nanomaterials, and is suitable for harsh working condition environment such as high temperature, high load, high vacuum and strong corrosion.

A fluorine-containing ether compound represented by the following formula. R1—CH2—R2a—CH2—R3a—CH2—R2b—CH2—R3b—CH2—R2c—CH2—R3c—CH2—R2d—CH2—R4 (R2a, R2b, R2c and R2d are each a perfluoropolyether chain, R3a, R3b, and R3c are each a divalent linking group having one or more polar groups, at least one of R3a, R3b, and R3c is represented by —OCH2CH(OH)CH2O—, and R1 and R4 are each a terminal group having 1 to 50 carbon atoms and one or more polar groups, and may be the same as or different from each other).

The invention discloses a method for preparing a fluorinated ethylene-propylene emulsion, and relates to a polymer emulsion polymerization technology. Comprising the following steps: adding water into a reaction kettle, heating, and replacing with nitrogen to control oxygen; adding perfluoropolyether ammonium carboxylate, heating, adding an initial TFE / HFP mixed monomer, stirring, and adding a potassium persulfate solution to initiate polymerization; supplementing the mixed monomer in the reaction to maintain the pressure, and adding diethyl malonate and a copolymerization composition regulator at the same time; and stopping the reaction after the designed feeding amount is reached. According to the invention, the proportion of copolymerization units can be optimized, high monomer conversion is realized, and the emulsion with high solid content and uniform particle size is obtained.

The application discloses a preparation method of a self-emulsifying type wet spinning raw silk oil agent and a preparation method of high-uniformity carbon fibers, and belongs to the technical field of carbon fibers. In the application, polyglycerol and epsilon-caprolactone are catalytically prepared into PG-PCL; then the PG-PCL is reacted with acrylate to obtain acrylated PG-PCL; finally, the PG-PCL, the acrylated PG-PCL and perfluoropolyether acrylate are uniformly dissolved in acetone; then carboxylated cellulose nanocrystals and iron phthalocyanine are added and high-speed shearing emulsification is carried out, and water is gradually added to form a nanoemulsion; and the high-uniformity carbon fibers are obtained by combining a low-temperature preparation method of the carbon fibers. The method synchronously solves the problems of emulsion stability, fiber uniformity and carbonization compatibility, shortens a production cycle, is suitable for high-end fields such as aerospace and new energy vehicles, and has the advantages of high performance and green manufacturing.

The present invention provides a perfluoropolyether compound that exhibits excellent surface tension reduction ability and excellent foaming properties and foam stability not only when diluted with freshwater but also with seawater, and a fluorine-based surfactant containing the compound. [Solution] A perfluoropolyetherdicarboxylic acid compound represented by the following formula (1) or a salt thereof. JPEG2026104874000023.jpg21118 (In the formula, Rf1 is a perfluoroalkyl group having 1 to 4 carbon atoms. R 1 R is a substituted or unsubstituted hydrocarbon group having 1 to 10 carbon atoms. 2 R is a substituted or unsubstituted hydrocarbon group having 1 to 6 carbon atoms. 3 and R 4 (where n is an integer from 0 to 5.)

Provided is a fluorine-containing ether compound represented by Formula (1). R1—CH2—R2—CH2—R3 (1) R2 represents a perfluoropolyether chain. R1 and R3 represent an end group having one to four polar groups and 1 to 50 carbon atoms. At least one of R1 or R3 represents an end group represented by Formula (2). —O—X—CH(OH)—CH2OH (2) X represents a divalent organic group having 2 to 30 carbon atoms, which may have at least one of one or two polar groups or one to three ether oxygen atoms. X has at least one carbon atom which is not bonded to any of the polar groups and the ether oxygen atoms.

The title of the invention is' Controllable extension of flexible oligomeric glycols and methods thereof '. Disclosed is an extended diol composition comprising: a first component comprising a diol oligomer; and a second component comprising a bis (dimethylaminosilane) species wherein the first component is in a molar excess relative to the second component, and wherein the diol oligomer has a number average molecular weight Mn of from about 500 g / mol to about 5,000 g / mol. The diol oligomer may be alpha, omega hydroxyl terminated, or further includes an R group that is a polyether, such as a perfluoropolyether, polyoxymethylene, polyethylene glycol, polytetramethylene glycol, or poly (propylene glycol); or a polyester, such as poly (caprolactone), poly (lactic acid), or poly (glycolic acid). The bis (dimethylamino) silane species may include R1 and R2, which may include CH3, a vinyl group, and a phenyl group. A method for preparing the extended diol composition is also disclosed.

Provided is a fluorine-containing ether compound that can form a lubricating layer that is resistant to chemicals even if the thickness is thin, and that can be used as a material for a lubricant for a magnetic recording medium. The fluorine-containing ether compound is represented by the following formula. R 1 -CH2-R 2 -CH2-OCH2-CHR 3 -CH2O-CH2-R 4 -CH2-R 5 (In the formula, R 2 and R 4 are perfluoropolyether chains. R 1 and R 5 are terminal groups in which two or three hydroxyl groups are each bonded to a different carbon atom, and the carbon atoms to which the hydroxyl groups are bonded are each bonded to each other via a linking group that includes a carbon atom to which no hydroxyl group is bonded. R 3 are represented by the following formula. -(CH2) a -OH (a is an integer from 2 to 8).

The application provides a fire-retardant immersion type cooling liquid for high-multiplicity lithium iron phosphate battery packs and a preparation method thereof, raw materials of the fire-retardant immersion type cooling liquid include, in percentage by weight, 85-95% fluorine compound base carrier, 5-15% phosphorus-nitrogen composite fire retardant; the fluorine compound base carrier contains low-boiling-point hydrofluoroether, branched-chain perfluoropolyether and h-BN nanosheet, and the fire retardant is a microencapsulated ammonium polyphosphate and melamine cyanurate compound system. The preparation is completed through carrier mixing, nanosheet composite dispersion, fire retardant compounding and vacuum degassing. The application realizes high heat dissipation, high insulation, UL94 V-0 level halogen-free fire retardancy and more than 6 months of stable performance, solves problems such as high viscosity, slow heat dissipation, poor fire retardancy, environmental protection hidden danger and insufficient stability of traditional cooling liquids, and adapts to the safety cooling demand of high-multiplicity lithium iron phosphate battery packs.