119 results about "Dimethyl formamide" patented technology

The invention relates to a phase change energy storage fiber with ultraviolet shielding and heat regulation and control functions and a preparation method of the phase change energy storage fiber. The preparation method comprises the following steps: dissolving thermoplastic polyurethane in N, N-dimethylformamide to form a spinning mother solution; the preparation method comprises the following steps: firstly, adding nano titanium dioxide and uniformly dispersing, then adding a silicon dioxide shell layer-octadecane core layer phase change microcapsule, and stirring and ultrasonically defoaming to obtain a uniform composite spinning solution; extruding the spinning solution into a coagulating bath consisting of isopropanol and deionized water through an injection pump, and coagulating and forming to obtain nascent fibers; finally, washing, solvent replacement, tension setting and drying treatment are conducted, and compared with the prior art, the obtained fiber has efficient ultraviolet shielding performance and remarkable phase change energy storage capacity and has wide application prospects in the fields of intelligent temperature adjusting textiles, outdoor protective garments, building heat management and the like.

The invention relates to the technical field of lithium-ion solid-state batteries, in particular to a three-dimensional polymer modified intermediate layer for a lithium-ion solid-state battery and a preparation method of the three-dimensional polymer modified intermediate layer, and the preparation method comprises the following steps: adding polyacrylonitrile into N, N-dimethylformamide, and stirring until the polyacrylonitrile is completely dissolved; and then adding the modified polyamide acid-phosphonate copolymer, continuously stirring to obtain an electrostatic spinning precursor solution, and carrying out electrostatic spinning on the electrostatic spinning precursor solution to obtain the composite nanofiber membrane. According to the invention, the indium-containing heterocyclic modified diamine is used as a core monomer of the polyamide acid-phosphonate copolymer, the lithium deposition nucleation overpotential can be reduced by the excellent lithium-loving activity of the indium-containing heterocyclic modified diamine, the lithium is enabled to be compact and free of dendritic crystal deposition, and the indium-containing heterocyclic group is uniformly dispersed in a three-dimensional framework through a cross-linked network of the modified polyamide acid-phosphonate copolymer, so that the performance of the polymer is improved. The contact interface of the intermediate layer and the lithium metal forms a global uniform lithium-loving site, and concentrated deposition of lithium atoms caused by local lithium-loving activity difference is avoided.

The invention provides halogen-free flame-retardant liquid epoxy resin, solid epoxy resin for powder coating and a preparation method of the solid epoxy resin, and belongs to the technical field of powder coating. The liquid epoxy resin disclosed by the invention is prepared by polymerizing 2, 4-diamino-6-phenyl-1, 3, 5-triazine, formaldehyde, triethyl phosphite, epoxy chloropropane, sodium hydroxide, DMF (Dimethyl Formamide) and the like. The contents of halogen-free flame-retardant elements nitrogen and phosphorus in the product are high, a solid epoxy resin product obtained by carrying out chain extension on liquid epoxy resin serving as a synthetic monomer of solid epoxy resin of the powder coating and bisphenol F is good in flame retardance, the oxygen index reaches 37% or above, and the flame retardance is high. A coating film obtained after the powder coating and an accelerated dicyandiamide curing agent are subjected to low-temperature rapid curing (150 DEG C / 10 min) is high in gloss and leveling grade and good in impact resistance, hardness and the like, and the application requirements of the powder coating are met.

The application discloses a police clothing fabric convenient for heat dissipation and a processing technology, and the processing technology comprises the following steps: after carbon fibers are pretreated by a potassium permanganate solution and a KH550 aqueous solution, the carbon fibers are added into N,N-dimethylformamide, then ethylenediaminetetraacetic dianhydride is added into the mixture under stirring, and stirring reaction is carried out; the product is extracted, washed and dried to obtain ethylenediaminetetraacetic dianhydride modified carbon fibers; the modified carbon fibers are added into deionized water, then mannitol is added, concentrated sulfuric acid is used as a catalyst, and stirring reaction is carried out; the product is centrifuged, washed and dried to obtain modified carbon fibers; the modified carbon fibers and PET chips are mixed, then melt spinning is carried out, and the police clothing fabric convenient for heat dissipation is obtained through weaving; the fabric greatly improves the moisture absorption, sweat releasing, air permeability and heat dissipation performance of the fabric, improves the breaking strength of the fabric, and is suitable for being used as a police fabric.

The invention discloses a preparation method of a high-quality perovskite thick film for an X-ray detector, and relates to the technical field of radiation detection materials and devices. The preparation method of the thick film comprises the following steps: preparing a precursor solution from lead iodide, cesium iodide, formamidine iodide, methylamine iodide, 4-guanidinobenzoic acid hydrochloride, N, N-dimethylformamide and acetonitrile; a bulk phase functional additive is introduced to optimize a large number of Schottky defects at the grain boundary of the perovskite thick film; depositing onto a heated conductive glass substrate using a spray coating technique; and in combination with a low-temperature solvent atmosphere annealing process, secondary growth of crystal grains and grain boundary healing are promoted, and a large-area polycrystalline thick film can be obtained.

The invention discloses a warp-wise elastic tatting antibacterial fabric and a preparation method thereof, and belongs to the technical field of antibacterial fabric preparation. The preparation method of the warp-wise elastic tatting antibacterial fabric comprises the following steps: step 1, adding composite polyester particles into a mixed solution of N, N-dimethylformamide and acetone, heating and stirring, adding a modified antibacterial agent, and carrying out electrostatic spinning treatment, drying, hot pressing and cutting to obtain composite polyester staple fibers; 2, wool is treated to obtain pretreated wool, the pretreated wool is mixed with composite polyester staple fibers, an antistatic agent and emulsified oil are added, opening mixing, carding, drawing and roving processing are carried out, and mixed roving yarn is obtained; 3, spandex yarn serves as core yarn, the core yarn is wrapped with the pretreated wool, elastic wrap yarn is formed, the elastic wrap yarn and the mixed coarse yarn are mixed, spinning, weaving and heat setting are conducted, and the warp-wise elastic tatting antibacterial fabric is obtained. The fabric prepared by the method has excellent antibacterial property and mechanical property.

The invention belongs to the technical field of oil exploitation, and particularly relates to a clay stabilizer for an oil field as well as a preparation method and application thereof. The preparation method comprises the following steps: adding 1, 1 '-bis (4-aminophenyl)-[4, 4'-dipyridyl]-1, 1 '-ammonium dichloride, DMF (Dimethyl Formamide), triethylamine and (3-chloropropyl)-trimethyl ammonium chloride into a reactor, and carrying out a first heat preservation reaction; adding chloroalkane into the reactor, and carrying out a second heat preservation reaction; adding diacyl chloride into the reactor, and carrying out a third heat preservation reaction; and carrying out reduced pressure distillation to remove DMF to obtain a clay stabilizer crude product, adding water and ethyl acetate, fully mixing, separating out ethyl acetate, and carrying out reduced pressure distillation to obtain the clay stabilizer. The clay stabilizer has the advantages of high anti-swelling rate and washing resistance, the anti-swelling rate reaches 97% or above, and the washing anti-swelling rate reaches 93.5% or above.

The invention discloses a flexible glass cutting fluid and a preparation method thereof, and the preparation method comprises the following steps: S1, adding cellobiose into DMF, then adding chloroacetic anhydride and pyridine, and carrying out a stirring reaction to obtain an intermediate; s2, adding the intermediate into DMF (Dimethyl Formamide), and then carrying out constant-temperature reaction on glycerol monocaprylate, 2-(2-hydroxyphenyl) benzothiazole and triethylamine to obtain a modifier; s3, uniformly mixing a modifier, sodium dioctyl sulfosuccinate and a polyoxyethylene polyoxypropylene block copolymer, so as to obtain a composite surfactant; s4, adding the composite surfactant, the propylene glycol, the defoaming agent, the sterilizing agent and the triethanolamine into the water, and uniformly stirring to obtain the cleaning agent. According to the prepared cutting fluid, the protection effect on a flexible glass base material and a surface functional layer of the flexible glass base material is remarkably improved while the excellent wettability is kept, microcrack generation and surface damage in the cutting process are reduced, and the cutting fluid is particularly suitable for precise glass processing of flexible display devices.

This invention provides a modified organic polymer, its preparation method, and its applications, relating to the field of environmental functional materials technology. The preparation method of the modified organic polymer includes the following steps: dissolving a metal compound in N,N-dimethylformamide solvent; adding an organic compound containing -COOH sites, ultrasonically dissolving, adding formic acid or acetic acid, mixing thoroughly, and carrying out a hydrothermal reaction at 160°C to 200°C for 20 to 28 hours; centrifuging to collect the precipitate, vacuum drying to obtain an organic polymer precursor; and alkalizing the organic polymer precursor in NaOH solution for at least 30 minutes to obtain the modified organic polymer product. By utilizing the empty electron orbitals surrounding the metal clusters to coordinate with the -COOH sites in the organic compound to form covalent bonds, the constructed modified organic polymer exhibits improved hydrophilicity, an increased number of active sites, and an optimized pore structure.

The present application relates to the technical field of organic synthesis, and particularly relates to a zinc-based fluorescent probe containing a pyridyl carboxylic acid type component, and a preparation method and application thereof. 22 H 14 N3O2)(CHO2)(H2O)·C3H7NO·3H2O; the zinc-based fluorescent probe containing the pyridyl carboxylic acid type component belongs to a monoclinic system, and a space group is P 2 1 / c ; cell parameters are a = 7.2925(2) Å, b = 26.6839(8) Å, c = 12.8618(4) Å, α = 90°, β = 105.5770(10)°, gamma = 90°. The zinc-based fluorescent probe has good thermal stability and large light emission intensity, the preparation method is simple, and the zinc-based fluorescent probe can be used as a fluorescent sensor to detect Fe 3+ and 2,4,6-trinitrophenol in a DMF solution with high sensitivity and high selectivity.

The invention relates to palmitoyl tripeptide-38 and a preparation method and application thereof.According to the palmitoyl tripeptide-38, low-toxicity and biodegradable NFM and anisole are compounded according to the volume ratio of 1: 1, and the palmitoyl tripeptide-38 has strong polarity and moderate hydrophobicity and can completely replace DMF. According to the mixed solvent, the solubility of Fmoc amino acid monomers, activating reagents and resin is improved, the risk of reproductive toxicity is avoided, and the volatility is reduced compared with that of DMF (Dimethyl Formamide); the process is synergistically enhanced, namely, the mass transfer limitation of the traditional intermittent reaction is overcome through the synergism of the laminar shear effect and the ultrasonic cavitation effect of a continuous flow reaction device, so that the coupling reaction time of the palmitoyl tripeptide-38 is shortened, the occurrence rate of side reaction is reduced, and the universality verifies that the solvent system has excellent performance in synthesis of the palmitoyl tripeptide-38, and the solvent system is suitable for industrial production. And the coupling efficiency is stable.

The invention discloses a method for synthesizing 5-(N, N-dibenzyl amino acetyl) salicylamide, which comprises the following steps: by taking benzaldehyde and benzylamine as raw materials and ethanol as a solvent, heating to a reaction temperature by using a micro-channel reactor, and reacting to obtain N-benzylidene benzylamine after the reaction is finished; taking the prepared N-benzylidene benzylamine as a raw material, adding hydrogen and a palladium carbon catalyst, reacting, and discharging the hydrogen after the reaction to obtain dibenzylamine; 5-bromoacetyl salicylamide and the prepared dibenzylamine are taken as raw materials, K2CO3 is taken as an acid-binding agent (or a deep eutectic solvent is used for replacing the acid-binding agent), acetonitrile is taken as a solvent, the materials are dropwise added under a low-temperature condition, a temperature rise reaction is carried out after dropwise adding is completed, the pH value of an obtained solid is adjusted with diluted hydrochloric acid to be acidic, then filtering, washing and drying are carried out, and the target product 5-(N, N-dimethyl-N, N-dimethyl formamide) is obtained. The compound is N, N-dibenzyl amino acetyl) salicylamide. The method has the advantages that the method is simple, the microchannel reactor is used, the product yield is high, the purity is high, and industrial production is easy.

The invention discloses bio-based shoe lining polyurethane synthetic leather as well as a preparation method and application thereof, and belongs to the technical field of polyurethane. The bio-based shoe lining polyurethane synthetic leather comprises a wet base layer, a breathable polyurethane layer and a wear-resistant polyurethane layer which are arranged in sequence, wherein the wet base layer is obtained by infiltrating and permeating the base cloth with wet base slurry, and the wet base slurry is prepared by mixing 100 parts by weight of bio-based polyurethane resin SW-6050Bio, 90-120 parts by weight of DMF (Dimethyl Formamide), 10-20 parts by weight of wood powder, 2-10 parts by weight of color paste and 0.2-1 part by weight of a penetrant; and the base cloth is bio-based base cloth. By optimizing the formula of each functional layer, the bio-based shoe lining polyurethane synthetic leather which is high in bio-based content, excellent in air permeability and wear resistance and soft in hand feeling is obtained, and the bio-based shoe lining polyurethane synthetic leather is very suitable for high-grade shoe lining leather products.

The invention discloses a substituted benzoxazinone-isoxazoline compound as well as a preparation method and application of the substituted benzoxazinone-isoxazoline compound. The preparation method comprises the following steps: by taking DMF (Dimethyl Formamide) as a solvent, reacting ethyl bromoacetate with a compound (II) to generate a compound (III), performing cyclization in the presence of acetic acid and reduced iron powder to obtain a compound (IV), reacting the compound (IV) with hydroxylamine hydrochloride to generate a compound (V), reacting the compound (V) with NCS and MMA (Methyl Methacrylate) in the presence of TEA (Tetraethyl Ammonium) to generate a compound (VI), and reacting the compound (VI) with NCS and MMA to generate a compound (V). Reacting the compound (VI) with propargyl bromide to obtain a substituted benzoxazinone-isoxazoline compound, performing alkaline hydrolysis on the substituted benzoxazinone-isoxazoline compound, and performing condensation reaction on the substituted benzoxazinone-isoxazoline compound and alcohol or amine to obtain a target product. According to the present invention, the weeding activity test results of the obtained product show that the inhibition effects of the compounds I1, I2, I4, I15 and I16 on the rape are good under the concentration of 100 ppm, the excellent weeding activity is provided, and the good prevention and control effect on the invasive organism zinnia elegans is provided.

The invention relates to the technical field of organic solvent nanofiltration, in particular to a preparation method of a polyimide organic solvent nanofiltration membrane. The preparation method comprises the following steps: preparing polyamide acid resin slurry as a membrane casting solution, and curing the membrane casting solution on a non-woven fabric to form a membrane; immersing the obtained membrane in deionized water; immersing the obtained membrane in an imidization reagent for reaction to generate polyimide, immersing the obtained membrane in deionized water, and immersing the polyimide membrane in a solution containing a cross-linking agent; and washing to obtain the polyimide organic solvent nanofiltration membrane. The organic solvent nanofiltration membrane has high flux and interception performance in a polar organic solvent, not only has long-term stability in common organic solvents such as alcohols, ketones, esters, hydrocarbons and the like, but also has long-term stability in strong polar aprotic solvents such as DMF (Dimethyl Formamide), DMAc (Dimethyl Acrylate), NMP (N-Methyl Pyrrolidone), DMSO (Dimethyl Sulfoxide) and the like; the film has potential application value in the fields of chemical industry, pharmacy, food and the like.

This invention discloses a method for preparing a blood purification dialysis membrane and its application, relating to the field of materials preparation technology. The method includes the following steps: S1, dissolving polyacrylonitrile powder in N-N-dimethylformamide solvent to obtain a PAN spinning solution; S2, spinning the PAN spinning solution using electrospinning to obtain a PAN nanofiber membrane; S3, depositing a multi-walled carbon nanotube solution into the interfiber gaps of the PAN nanofiber membrane to obtain a composite PAN nanofiber membrane; S4, subjecting the composite PAN nanofiber membrane to hot-pressing treatment to obtain the blood purification dialysis membrane. By combining electrospinning with multi-walled carbon nanotube deposition and hot-pressing processes, a composite membrane with a gradient pore size structure is constructed. This effectively removes small and medium-sized toxins while selectively retaining large-molecule proteins, solving the technical challenges of wide pore size distribution and difficulty in balancing toxin removal and protein retention in traditional dialysis membranes. It offers the advantages of precise membrane structure control and improved blood purification efficiency.

The invention relates to the technical field of preparation of magnetoelectric materials, and provides an organic-inorganic layered magnetoelectric composite material and a preparation method thereof, and the preparation method of the composite material comprises the following steps: S1, uniformly mixing dimethylformamide, barium titanate and P (VDF-HFP) to obtain a mixed slurry; s2, carrying out tape casting on the mixed slurry on the surface of a frosted plate by adopting a tape casting method, and drying to obtain a P (VDF-HFP) / BaTiO3 composite film; and S3, the dried composite film is quenched and then dried, nickel is sputtered on one face of the composite film, nickel or copper is sputtered on the opposite face of the composite film, and then annealing is conducted to obtain the organic-inorganic layered magnetoelectric composite material. The composite film provided by the invention has excellent electrical performance, magnetic performance and magnetoelectric coupling performance; when a magnetic field perpendicular to the electric signal output direction is applied, the magnetoelectric coupling performance can be enhanced through interface normal stress transfer, and a new thought is provided for preparation of high-performance functional devices.

The invention discloses a preparation method of N-acetyl blue and application of the prepared N-acetyl blue in fabric dyeing, and relates to the technical field of compound synthesis. According to the preparation method of the N-acetyl blue, H2SO4 and aluminum chloride are adopted as a composite catalyst to catalyze N, N-dimethyl formamide; according to the present invention, the N, N '-diacetyl blue hydrolysis reaction is performed, such that the potential barrier of the N, N'-diacetyl blue hydrolysis reaction can be reduced so as to directionally remove one acetyl in the molecule to generate the N-acetyl blue, the product with the yield of more than 53% and the purity of more than 78% can be obtained by using the preparation method, and the purity and the reaction yield are excellent.

This invention relates to the field of polymer materials technology, specifically to a permanent antistatic ABS composite material based on polyethylene polyamine-aminated carbon nanotubes, its preparation method, and its application. The method includes: Step 1, basicizing carbon nanotubes; Step 2, mixing carboxylated carbon nanotubes, N,N'-dicyclohexylcarbodiimide, and 4-dimethylaminopyridine, adding N,N-dimethylformamide solvent, and then adding polyethylene polyamine to obtain polyethylene polyamine-aminated carbon nanotubes; Step 3, grafting the polyethylene polyamine-aminated carbon nanotubes with a styrene-maleic anhydride copolymer to obtain styrene-maleic anhydride-grafted polyethylene polyamine-aminated carbon nanotubes; Step 4, melting the styrene-maleic anhydride-grafted polyethylene polyamine-aminated carbon nanotubes with ABS to obtain a permanently antistatic ABS composite material. This preparation method uses polyethylene polyamine to aminate carbon nanotubes, improving the antistatic effect and mechanical properties of the ABS composite material.

The invention belongs to the field of chemical synthesis of medicines, and discloses a preparation method of doxylamine succinate, which comprises the following steps: step 1, by taking 1-phenyl-1-(pyridine-2-yl) 1-ethanol and a compound 3 as raw materials, carrying out substitution reaction on the 1-phenyl-1-(pyridine-2-yl) 1-ethanol and the compound 3 under the action of an alkali reagent to obtain N, N-dimethyl formamide; the preparation method comprises the following steps: adding N, N-dimethyl-2-[1-phenyl-1-(2-pyridine) ethyoxyl] ethylamine; and 2, carrying out a salt forming reaction on the N, N-dimethyl-2-[1-phenyl-1-(2-pyridine) ethyoxyl] ethylamine and succinic acid, so as to obtain the doxylamine succinate. According to the invention, sulfonic acid 2-(dimethylamino) ethyl ester which has a high boiling point and is efficiently converted is used, so that the yield of the product is greatly improved; in addition, the target crystal form can be stably reproduced and obtained in a low-temperature salt forming and crystallization mode. According to the method, the total yield reaches 93.5% or above, and the purity reaches 99.7% or above.

The invention discloses a wound dressing with a one-way seepage discharge function, which comprises an inner-layer nanofiber membrane, a middle-layer nanofiber membrane and an outer-layer nanofiber membrane, and the inner-layer nanofiber membrane, the middle-layer nanofiber membrane and the outer-layer nanofiber membrane are all prepared through electrostatic spinning. The inner-layer nanofiber membrane comprises the following raw materials: polyurethane, tetrahydrofuran and N, N-dimethylformamide, the middle-layer nanofiber membrane comprises the following raw materials: polyurethane, polyacrylonitrile, N, N-dimethylformamide and sodium polyacrylate, and the outer-layer nanofiber membrane comprises the following raw materials: N, N-dimethylformamide, polyacrylonitrile and sodium polyacrylate. According to the wound dressing with the one-way seepage discharging function, excessive seepage at the wound is effectively guided out and removed, a microenvironment with appropriate humidity can be kept for the wound, secondary infection of the wound is avoided, and wound healing is promoted. The invention further provides a preparation method of the wound dressing with the one-way seepage discharge function.

The invention relates to a dihydrate 5-[(1E)-(3, 5-dicarboxylphenyl) ethylazenyl] benzene-1, 3-dicarboxylic acid-di (1, 10-phenanthroline) zinc coordination polymer, and belongs to the field of fluorescent probes. The invention aims to provide a novel compound. The molecular formula of the polymer is C40H26N4O10Zn2. The structural formula of the polymer is shown in the description. The method comprises the following steps: 1, adding an ethanol aqueous solution into a mixture of 5-nitroisophthalic acid, zinc powder and sodium hydroxide, heating, refluxing, stirring for reaction, filtering, soaking a filter cake in a sodium hydroxide solution, stirring for dissolution, carrying out suction filtration, adjusting the pH value, and carrying out suction filtration and drying to obtain a 5-[(1E)-(3, 5-dicarboxyphenyl) ethyl azenyl] benzene-1, 3-dicarboxylic acid ligand; and 2, adding the ligand obtained in the step 1 and 1, 10-phenanthroline into a mixed solvent of N, N '-dimethylformamide, acetonitrile and water, carrying out a stirring reaction, adjusting the pH value until the precipitate is dissolved, carrying out continuous stirring, transferring the obtained solution into a reaction kettle, carrying out programmed heating to obtain a golden needle-shaped crystal, washing, filtering, and drying to obtain the product. The invention is applied to the field of fluorescent probes.

A process to produce cellulose ester fibers is provided, the process comprising: a. mixing cellulose ester and at least one solvent at a temperature ranging from about 60℃ to less than 90℃ to produce a cellulose ester dope; wherein the solvent comprises N, N-dimethylformamide, N, N-dimethylacetamide, or dimethyl sulfoxide, or mixtures thereof; and b. spinning the cellulose ester dope through at least one spinneret to produce the cellulose ester fibers; wherein the cellulose ester fibers have improved color over cellulose ester fibers produced from dope mixed outside about about 60℃ to less than 90℃.

The invention belongs to the technical field of catalysts, and discloses an iron-tantalum bimetal organic framework catalyst and a preparation method and application thereof. The iron-tantalum bimetal organic framework catalyst takes foamed nickel as a substrate, and a needle-shaped iron-tantalum bimetal organic framework material is uniformly loaded on the foamed nickel substrate. The preparation method comprises the following steps: carrying out acid etching on foamed nickel, then washing with ethanol and water in sequence, and drying; the preparation method comprises the following steps: uniformly dispersing water-soluble ferric salt and tantalum chloride in water to obtain a solution A; 2-hydroxyterephthalic acid is dissolved in a mixed solvent composed of absolute ethyl alcohol and N, N-dimethylformamide, and a solution B is obtained; dropwise adding the solution B into the solution A to obtain a solution C; obliquely placing foamed nickel into a hydrothermal reaction kettle, adding the solution C, completely soaking the foamed nickel, and reacting at 80-125 DEG C for 8-12 hours; and taking out the foamed nickel, washing with water, and drying to obtain the target catalyst. The catalyst prepared by the invention can realize low overpotential and excellent stability when being used for water electrolysis oxygen evolution reaction.

The invention belongs to the technical field of oil exploitation, and particularly relates to a water-based fracturing fluid as well as a preparation method and application thereof. The preparation method comprises the following steps: adding 4-vinylaniline and a catalyst into a high-pressure reaction kettle, heating, introducing ethylene oxide, and carrying out heating and heat preservation reaction; cooling, adding sulfamic acid powder, heating, preserving heat, reacting, and cooling to obtain a first functional monomer; adding beta-cyclodextrin and DMF (Dimethyl Formamide) into a first reactor, stirring and dissolving, adding triethylamine, cooling, dropwise adding acryloyl chloride, and carrying out low-temperature reaction, suction filtration, washing and drying to obtain a second functional monomer; adding acrylamide, a first functional monomer, a second functional monomer, 3-[(3-acrylamidopropyl) dimethylammonium] propionate, distilled water and sodium dihydrogen phosphate into a second reactor, and uniformly stirring; and adding an initiator, carrying out heat preservation reaction, and cooling to obtain the water-based fracturing fluid. The water-based fracturing fluid disclosed by the invention has the advantages of high apparent viscosity, strong shear resistance and good salt resistance and hardness resistance.

This application discloses a solid electrolyte separator based on esterified cellulose and its preparation method, specifically including the following steps: first, esterified cellulose derivatives are obtained by modifying cellulose acetate as a base with 4-methylphthalic anhydride; then, the esterified cellulose derivative is dissolved in N,N-dimethylformamide with lithium bis(trifluoromethanesulfonylimide) and succinate, mixed evenly, coated onto a mold, and vacuum dried to obtain the separator. This separator exhibits good mechanical properties and interfacial stability, effectively suppressing lithium dendrite growth and improving battery safety. Lithium metal batteries assembled using this separator demonstrate high discharge specific capacity and good cycle stability, making them suitable for high-energy-density solid-state lithium batteries.

The present application relates to the technical field of lithium ion solid-state battery, in particular to a three-dimensional polymer modified interlayer for lithium ion solid-state battery and a preparation method thereof, comprising the following steps: adding polyacrylonitrile into N, N-dimethylformamide and stirring until completely dissolved, then adding modified polyamide acid-phosphonate copolymer and continuing to stir to obtain an electrospinning precursor solution, and electrospinning the electrospinning precursor solution to obtain a composite nanofiber membrane. The present application uses indium-containing heterocyclic modified diamine as the core monomer of polyamide acid-phosphonate copolymer, and the excellent lithium affinity activity of the core monomer can reduce the lithium deposition nucleation overpotential, promote the lithium dense dendrite-free deposition, and the indium-containing heterocyclic groups are uniformly dispersed in the three-dimensional framework through the crosslinking network of the modified polyamide acid-phosphonate copolymer, so that the contact interface between the interlayer and lithium metal forms a global uniform lithium affinity site, and the lithium atom concentrated deposition caused by the local lithium affinity activity difference is avoided.