1439 results about "Acetamide" patented technology

The invention relates to a preparation method of an amino-functionalized metal organic framework material and application of the prepared material to separation of CO2 / N2 and CO2 / CH4. The preparation method comprises the following steps: dissolving adenine and copper nitrate trihydrate in N, N '-dimethylacetamide to obtain a first mixed solution; dissolving carboxylic acid and potassium carbonate in deionized water to obtain a second mixed solution; and adding the second mixed solution into the first mixed solution, carrying out stirring reaction, and carrying out vacuum drying on an obtained solid product to obtain the amino-functionalized metal organic framework material. The amino-functionalized metal organic framework material prepared by the invention has high CO2 adsorption selectivity and adsorption capacity, and also has good acid-resistant, alkali-resistant and water-resistant stability. The amino-functionalized metal organic framework material prepared by the preparation method disclosed by the invention is applied to industrial CO2 adsorption separation and has an excellent separation effect.

The invention belongs to the field of photocatalytic materials, and particularly relates to a high-entropy sulfide and a preparation method and application thereof. The high-entropy sulfide is granular, the molecular general formula is (MnaFebCocCudZe) xS, x is equal to 1, and the atomic ratio of Mn to Fe to Co to Cu to Zn is a: b: c: d: e of (1-2): (1-2): (1-2): (1-2): (1-2): (1-2): (1-2). The preparation method comprises the following steps: S1, dissolving metal salt in a mixed solvent of isopropanol and glycerol according to the atomic ratio of metal elements, and carrying out solvothermal reaction to obtain a precursor; and S2, dispersing the precursor in ethanol, adding thioacetamide as a sulfur source, and carrying out solvothermal reaction to obtain the high-entropy sulfide. The high-entropy sulfide disclosed by the invention is used as a photocatalytic material and shows excellent photocatalytic performance.

The invention discloses a photocatalytic preparation method of a deuterated acetamide compound, and belongs to the technical field of synthesis of deuterated acetamide compounds. According to the technical scheme, the method is characterized in that a dichloroacetamide compound is used as a raw material, D2O is used as a deuterium source, and the dideuterated acetamide compound is synthesized through reaction under the room-temperature nitrogen illumination condition; according to the method, dichloroacetamide compounds are taken as raw materials, D2O is taken as a deuterium source, deuterated dichloroacetamide compounds are synthesized through room-temperature reaction, and monodeuterated or trideuterated acetamide compounds are respectively obtained through photocatalytic reaction according to different solvents (H2O or D2O) added into a system. The preparation method provided by the invention has the advantages of simple and safe operation, mild reaction conditions, no transition metal participation, cheap and easily available deuterium source, high deuteration rate, controllable number and the like.

The invention discloses a fluralamide moxidectin drop and a preparation method thereof, and relates to the technical field of veterinary drugs. The drop is prepared from the following components in parts by weight: 26 to 26.5 parts of fluralan, 1.32 parts of moxidectin, 0.10 part of butylated hydroxytoluene, 29.5 to 30.5 parts of dimethylacetamide, 19.5 to 20 parts of tetrahydrofuran polyethylene glycol ether, 13 to 13.5 parts of diethyl toluamide, 8.5 to 9.3 parts of acetone and 1.0 to 1.5 parts of ethanol. The invention has the effects of improving the stability, permeability and lasting effect of the medicine.

The invention discloses a microporous breathable fabric as well as a preparation method and application thereof, and relates to the technical field of fabric treatment. The invention discloses a preparation method of a microporous breathable fabric, which comprises the following steps: coating the surface of a base cloth with a polyurethane coating agent, and drying to obtain the microporous breathable fabric, the polyurethane coating agent is prepared from the following raw materials in parts by weight: 100 parts of organic silicon modified polyurethane emulsion, 8 to 11 parts of N, N-dimethylacetamide, 2 to 2.5 parts of n-caprylic alcohol, 5 to 8 parts of a foam homogenizing agent and 1 to 3 parts of a thickening agent PTF; the organic silicon modified polyurethane emulsion is obtained by crosslinking polyurethane with carboxymethyl cellulose through silica sol; the polyurethane coating agent prepared by taking the organic silicon modified polyurethane emulsion as the base material is coated on the surface of the base cloth, so that the fabric has high waterproof performance and also has high air permeability and moisture permeability; the microporous breathable fabric prepared by the invention is applied to the field of outdoor sportswear, and comfortable wearing experience is provided.

The invention discloses a fluoride-free waterproof sound-transmitting film and a preparation method thereof, and the fluoride-free waterproof sound-transmitting film comprises the following components in percentage by mass: 30-40% of a fluoride-free polymer; 4.5%-11.5% of a fluoride-free waterproof agent; 0.5%-3.5% of a cross-linking agent and 45%-65% of a solvent; the solvent is a mixed solvent of N 'N-dimethylformamide, N' N-dimethylacetamide, acetone and ethyl acetate, and the mass ratio of the amide solvent in the mixed solvent is 60%-85%; the preparation method of the fluoride-free waterproof sound-transmitting film comprises the following steps: preparing a spinning solution; carrying out electrostatic spinning by utilizing electrostatic spinning equipment to obtain a continuous and uniform nano spinning membrane; the method comprises the following steps: uniformly depositing nanofibers on a nano spinning film base material, and carrying out post-treatment to obtain a finished product of the fluoride-free waterproof sound-transmitting film, the fluorine-free safe and healthy product with good water resistance and air permeability, high rebound resilience and excellent acoustic performance is successfully prepared through selection of raw materials, preparation of a spinning solution, spinning process parameters and fine regulation and control of post-treatment conditions.

The invention discloses a polyimide and epoxy resin composite modified fluorocarbon resin coating and a preparation method thereof, and the polyimide and epoxy resin composite modified fluorocarbon resin coating comprises the following components in percentage by weight: 0.4-0.8% of monomer diamine, 0.4-0.8% of monomer dianhydride, 60-70% of N, N-dimethylacetamide, 10-20% of epoxy resin, 0.2-0.5% of epoxy curing agent, 1-2% of fluorocarbon resin curing agent and 15-25% of fluorocarbon resin. The preparation method comprises the following specific steps: reacting monomer diamine and dianhydride in N, N-dimethylacetamide, sequentially compounding with epoxy resin and an epoxy curing agent to obtain a composite modifier, and adding the composite modifier and a fluorocarbon resin curing agent into a fluorocarbon resin solution to obtain the polyimide and epoxy resin composite modified fluorocarbon resin coating. Compared with an existing fluorocarbon resin coating, the performance of the fluorocarbon resin coating is greatly improved in the aspects of mechanical performance, heat resistance, adhesive force and the like.

The invention relates to the technical field of layered composite fabrics, in particular to a bio-based antibacterial fiber fabric and a preparation method thereof. The preparation method comprises the following steps: carrying out a reaction on diisocyanate, polyether polyol, bio-based polyester polyol and hexamidine dihydroxyethyl sulfonate in N, N-dimethylacetamide, so as to obtain a polyurethane prepolymer solution; 2-(4-aminophenyl)-5-aminobenzimidazole and amino-modified nano-zinc oxide are sequentially added into the polyurethane prepolymer solution for a reaction, a prepared polyurethane spinning solution is subjected to dry spinning to prepare polyurethane fibers, and then the polyurethane fibers are sequentially spun into yarn and fabric; the bio-based nylon is subjected to melt spinning to obtain bio-based nylon fibers, and the bio-based nylon fibers are sequentially spun into yarns and fabrics; the bio-based antibacterial fiber fabric is prepared by taking a polyurethane fabric as an inner-layer fabric and taking a bio-based chinlon fabric as an outer-layer fabric, and the fabric is good in antibacterial performance and moisture absorption performance.

The invention provides a method for promoting acquisition of clean fuel by light / sound concerted catalytic degradation of waste plastics and upgrading and conversion thereof, which comprises the following steps: uniformly mixing g-C3N4, cadmium acetate and thioacetamide according to a predetermined proportion, pouring into a reaction kettle, placing in a high-temperature oven for a predetermined time, centrifuging, cleaning and drying to obtain a catalyst, the method comprises the following steps: loading a catalyst on the surface of aerogel, hydrogel or non-woven fabric to obtain an MTSJA-loaded catalyst, treating waste plastic with NaOH, adding the MTSJA-loaded catalyst, stirring under irradiation of a xenon lamp, starting ultrasound for reaction, and carrying out light / sound synergistic catalytic degradation on the waste plastic. According to the method, energy consumption is not needed, toxic and harmful gas is not generated, the purposes of energy conservation and environmental protection can be achieved, meanwhile, carbon dioxide in water can be catalytically reduced to generate clean energy such as methane in the process of degrading the waste plastic, and further obtaining of the energy is promoted.

The invention discloses a catalytic material for self-circulation photocatalytic Fenton and a preparation method thereof, and relates to the technical field of catalytic materials, the method comprises the following steps: adding thioacetamide into a manganese chloride solution, mixing, stirring, adding ammonia water, and reacting at 180-200 DEG C for 18-24 hours to obtain alpha-MnS; the preparation method comprises the following steps: dispersing alpha-MnS in an ethanol solution, then adding thiourea, stirring and mixing, then soaking the foam iron-nickel in the mixed solution, carrying out ultrasonic treatment, and finally reacting for 6-14 hours at 120-140 DEG C to obtain the catalytic material for self-circulation photocatalytic Fenton. The invention also discloses the catalytic material for the self-circulation photocatalytic Fenton, which is prepared by the method. The catalytic material has efficient self-circulation photo-Fenton performance, and has great application value in pollutant degradation and wastewater treatment.

The invention discloses a superfine high-strength meta-position aramid fiber and a preparation method thereof, and the superfine high-strength meta-position aramid fiber is obtained by adjusting the type of a wet spinning coagulating bath and reducing the temperature of the coagulating bath to realize super-stretching. Ethyl acetate and dimethylacetamide are used as a coagulating bath, and meanwhile, the temperature of the coagulating bath is reduced, so that the coagulating speed of the fiber in the coagulating bath is slowed down, the intermolecular force of the fiber is stronger, a more stable network gel state is formed, and very excellent stretchability is achieved. The meta-position aramid fiber prepared by the method has the advantages that the diameter is as small as 1.43 mu m, the tensile rate can reach 8000 times, the breaking strength reaches 1332 MPa, and the elongation at break is more than 20%.

The invention discloses a method for synthesizing a Mn0. 43Cd0. 57S / Cu2MoS4 photocatalyst by adopting a solvothermal method, and belongs to the technical field of catalysts. The preparation method comprises the following steps: preparing copper molybdenum sulfide by using cuprous oxide as a template, synthesizing copper molybdenum sulfide with high purity and good crystallinity by combining a solvothermal method, preparing manganese cadmium sulfide by using manganese acetate, cadmium acetate, sodium hydroxide and thioacetamide as raw materials, adding copper molybdenum sulfide before a hydrothermal reaction, successfully modifying the manganese cadmium sulfide by constructing a heterojunction, and preparing the copper molybdenum sulfide modified manganese cadmium sulfide. The Mn0. 43Cd0. 57S / Cu2MoS4 photocatalyst is synthesized, and the photocatalytic hydrogen production rate of the cadmium manganese sulfide is improved. Moreover, the hydrogen production rate of the Mn0. 43Cd0. 57S / Cu2MoS4 photocatalyst prepared by the invention can reach 8233 mu mol / (g.h), which is 2.08 times of the hydrogen production rate of pure cadmium manganese sulfide, and 1.24 times of the hydrogen production rate of cadmium manganese sulfide loaded with 1% platinum.

The invention relates to the technical field of nano-generators, in particular to a triboelectric material of nano-porous composite fibers and a preparation method and application of the triboelectric material of the nano-porous composite fibers, and the preparation method comprises the following steps: adding polyvinylidene fluoride and perfluoroethylene propylene copolymer nanoparticles into a mixed solvent of N, N-dimethylacetamide / acetone; uniformly mixing to obtain a polyvinylidene fluoride / perfluoroethylene propylene copolymer nanoparticle spinning emulsion; and carrying out electrostatic spinning on the polyvinylidene fluoride / perfluoroethylene propylene copolymer nanoparticle spinning emulsion to obtain the triboelectric material. The triboelectric material prepared through the method is a high-charge-density super-hydrophobic nano-generator material based on electrostatic spinning, the electrostatic spinning porous composite fiber material is used as a friction medium layer, high surface charge, hydrophobicity and fouling resistance are achieved, and the performance of a flexible solid-liquid interface nano-generator is improved.

The present disclosure relates to pharmaceutically acceptable salts, cocrystals, and crystalline forms thereof, of a compound which is N—((S)-1-(3-(4-chloro-3-(methylsulfonamido)-1-(2,2,2-trifluoroethyl)-1H-indazol-7-yl)-6-(3-methyl-3-(methylsulfonyl)but-1-yn-1-yl)pyridin-2-yl)-2-(3,5-difluorophenyl)ethyl)-2- ((3bS,4aR)-5,5-difluoro-3-(trifluoromethyl)-3b,4,4a,5-tetrahydro-TH-cyclopropa[3,4]cyclopenta[1,2-c]pyrazol-1-yl)acetamide, which is useful in the treatment of a Retroviridae viral infection including an infection caused by the HIV virus.

To provide: a cleaning fluid having improved removability of stains due to impurities: and a cleaning method using the cleaning fluid.SOLUTION: Provided is a cleaning fluid, comprising a solvent and a metal remover. The cleaning fluid includes two or more kinds of solvents, the distance (HSP distance) between the Hansen solubility parameter of the cleaning fluid and the Hansen solubility parameter of dimethylacetamide is 1.0 or less, and the content of metal impurities is 0.1×10-9 pts.mass or more to 102×10-6 pts.mass or less relative to 100 pts.mass in total of the solvent and the metal remover.SELECTED DRAWING: None

The present invention relates to the field of the preparation of polyurethane elastic fibers, and relates to a preparation method for a bio-based polyurethane elastic fiber, comprising: preparing polyether polyol from sucrose, glycerol, dimethylamine and propylene oxide; adding a solvent, i.e., N,N-dimethylacetamide, and polyether polyol and polyisocyanate into a reaction tank, and adding p-Toluenesulfonyl semicarbazide and aluminum methylenebis(2,4-di-tert-butylphenoxy) phosphate to prepare a spinning solution; and subjecting the spinning solution to spinning and oil application by means of dry spinning technology to obtain the bio-based polyurethane elastic fiber. The present invention ensures that the properties of polyurethane elastic fibers do not deteriorate or are partially enhanced, while the cost and performance advantages are achieved.

The invention provides a method for preparing high-purity hafnium tetrachloride by wet extraction and separation, which comprises the following steps: stirring and leaching hafnium alloy waste serving as a raw material by using HNO3 and HF mixed acid, then adding thioacetamide, adjusting the pH value to 4-5, stirring and filtering; compounding tributyl phosphate, trioctylphosphine oxide and sulfonated kerosene to obtain a composite extracting agent, and stirring and mixing to form a homogeneous organic phase; in a hydrochloric acid medium, controlling the volume ratio of an organic phase to a water phase to be (2.5-3.5): 1, carrying out three-stage counter-current extraction, and standing for phase splitting; the extracted organic phase passes through an adsorption column filled with iminodiacetic acid modified silica gel; and carrying out reverse extraction by using a hydrochloric acid solution, and then carrying out reduced pressure evaporation concentration, cooling crystallization and dehydration to obtain hafnium tetrachloride. According to the method, the zirconium and hafnium separation efficiency in the hafnium tetrachloride preparation process is improved, and the problem that the content of zirconium and hafnium impurities in the product is too high is solved.

The invention relates to a nitrogen-containing heterocyclic compound as well as a preparation method and application thereof, belongs to the technical field of heterocyclic compound synthesis, and solves the problems of low reaction efficiency and high energy consumption caused by the fact that an existing method for synthesizing an indole maleimide derivative needs to be carried out step by step. The preparation method comprises the following steps: step 1, adding indoleacetamide and a nucleophilic reagent into a mixed solution, and reacting; 2, performing post-treatment to obtain a nitrogen-containing heterocyclic compound; the mixed solution comprises alkali, an additive and an organic solvent; the alkali comprises one of triethylamine (Et3N), N, N-diisopropylethylamine, pyridine and 1, 8-diazabicyclo [5.4. 0] undec-7-ene, and the alkali comprises one of 1, 8-diazabicyclo [5.4. 0] undec-7-ene.

The invention discloses a tear-resistant fluororubber material and a preparation method thereof, and belongs to the technical field of fluororubber production, and the tear-resistant fluororubber material comprises the following raw materials: tetrafluoroethylene-propylene rubber, modified carbon nanotubes, a vulcanizing agent, an accelerant, a plasticizer and an anti-aging agent. The modified carbon nanotube is prepared by the following steps: adding a multi-walled carbon nanotube into 2-phosphonobutane-1, 2, 4-tricarboxylic acid, vacuumizing, heating and stirring, cooling, discharging, washing and drying to obtain a phosphonic acid modified carbon nanotube, adding the phosphonic acid modified carbon nanotube and thioacetamide into pure water, ultrasonically stirring, adding a metal nitride, and stirring to obtain the phosphonic acid modified carbon nanotube. And heating to 80-90 DEG C, stirring at a constant temperature for 8-10 hours, cooling to room temperature after the stirring is finished, and carrying out suction filtration, washing and drying to obtain the modified carbon nanotube. Through detection, the fluororubber prepared by the invention has excellent tear resistance, mechanical property and flame retardant property.

The application discloses a preparation method of a hydrophilic oil-water separation anti-pollution membrane and the anti-pollution membrane and application thereof, and prepares MNRs material; the MNRs material is dispersed in dimethylacetamide, is uniformly stirred, polyvinylpyrrolidone is added, and stirring is continued, and a first mixture is obtained through ultrasonic treatment; the first mixture is mixed with polyvinylidene fluoride to obtain a second mixture, and the second mixture is stirred; the treated second mixture is dip-coated on a carrier, the dip-coated carrier is treated in deionized water to obtain an ultrafiltration membrane; the ultrafiltration membrane is soaked in a tea polyphenol solution with a Tris-HCl buffer solution, and is shaken to obtain the hydrophilic oil-water separation anti-pollution membrane. The hydrophilic oil-water separation anti-pollution membrane has excellent separation efficiency and flux recovery rate for four different oil-water mixtures of kerosene, gasoline, edible oil and n-hexane. The preparation process of the oil-water separation membrane is simple, the cost is low, and the reaction condition is mild; when the oil-water separation membrane is applied to organic wastewater separation, the oil-water separation membrane has the advantages of high efficiency, good removal performance and good recycling performance.

This application relates to the field of microbial fermentation technology, and specifically discloses an N-hydroxyamino-N'-acetylguanine blue, its fermentation method and application. The chemical name of the N-hydroxyamino-N'-acetylguanine blue is N-(5'-hydroxyamino-2,6,2',6'-tetraoxo-1,6,1',6'-tetrahydro-2H,2'H-[3,3'] bipyridylmethylene)-acetamide, and the molecular formula is C 12 H 10 O6N4; compared with N-acetylguanine blue, the absorption of N-hydroxyamino-N'-acetylguanine blue is deeper in color at UV611, and at the same time, the formation of hydrogen bonds with amino groups on the fiber can enhance the dyeing property of the dye on the fiber and improve the wash fastness.

The invention discloses a rare earth metal doped transition metal electrocatalyst and a preparation method and application thereof, the chemical formula of the catalyst is Eu-CoS1.097, the catalyst is of a crystalline and amorphous structure, and the Eu element exists in a monatomic form; the preparation method comprises the following steps: (1) dissolving polyvinylpyrrolidone and NH2-H2BDC in a solvent to obtain a mixed solution; (2) adding cobalt salt and europium salt into the mixed solution, uniformly mixing, and carrying out hydrothermal reaction to obtain an EuCo-MOF precursor; and (3) adding the EuCo-MOF precursor and thioacetamide into a solvent, and carrying out hydrothermal reaction, so that TAA releases S < 2->, and etching to obtain the rare earth metal doped transition metal electrocatalyst with a hollow spherical structure. According to the catalyst disclosed by the invention, atomic-scale Eu is doped in cobalt sulfide, so that the activity of the transition metal catalyst is effectively improved; the preparation method is simple and efficient.

The invention is applicable to the field of preparation of modified polyimide materials, and provides a transparent polyimide film material with corona resistance and a preparation method thereof, the transparent polyimide film material comprises the following raw materials: nano SiO2 particle-N, N-dimethylacetamide dispersion liquid, a diamine monomer, a benzoxazine monomer and a dianhydride monomer; wherein the N, N-dimethylacetamide dispersion liquid contains nano silicon dioxide (the particle size is about 10-20 nm, and the mass fraction is 30 wt% + / -5 wt%). The transparent polyimide film with corona resistance is prepared by uniformly dispersing nano silicon dioxide particles and benzoxazine in a polyimide matrix by adopting an in-situ polymerization method, the film realizes excellent corona resistance of a material, and meanwhile, the preparation method has the advantages of simple process, energy conservation, environmental protection, high efficiency and the like.

The invention relates to the technical field of battery materials, and discloses a composite solid electrolyte diaphragm as well as a preparation method and application thereof. The composite solid electrolyte diaphragm comprises a base membrane and a solid electrolyte coating arranged on at least one surface of the base membrane, the solid electrolyte coating comprises an electrolyte I and an electrolyte II; the electrolyte I is lithium titanium aluminum phosphate and lithium lanthanum zirconium tantalum oxide; and the electrolyte II is a compound of lithium bis (oxalate) borate and acetamide in a molar ratio of 1: (6.5-7.5). The composite solid electrolyte diaphragm provided by the invention can realize relatively high ionic conductivity, and when the composite solid electrolyte diaphragm is used in a lithium ion battery, the battery can have relatively low internal resistance.

The invention discloses a preparation method of a rare earth ion doped antibacterial modified hydroxyapatite whisker material, and relates to the technical field of medical biomaterials.The preparation method comprises the steps that acetamide is dissolved in deionized water, and a solution A is obtained; dissolving calcium salt, cerium salt and ammonium salt in a certain proportion in the solution A to obtain a solution B; stirring the solution B at room temperature, performing ultrasonic dispersion, and adjusting the pH value to be acidic to obtain a solution C; and putting the solution C into a high-pressure reaction kettle, heating and reacting, aging, cleaning, carrying out suction filtration, and drying to obtain the cerium-doped hydroxyapatite whisker material. The preparation process is simple, the product is stable, and the prepared modified hydroxyapatite whisker has an obvious antibacterial effect on escherichia coli and staphylococcus aureus and can be applied to the field of bone repair antibacterial materials.

A method for catalyzing selective oxidation of 5-hydroxymethylfurfural by ion-doped birnessite belongs to the field of chemical engineering, and comprises the following steps: adding an ion-doped birnessite type catalyst into a solvent, and catalyzing 5-hydroxymethylfurfural to prepare 2, 5-furandicarboxaldehyde and 2, 5-furandicarboxylic acid in the atmosphere of air or oxygen at the temperature of 25-240 DEG C, wherein the solvent is water, methanol, ethanol, acetonitrile, dichloromethane, N, N-dimethylformamide, N, N-dimethylacetamide and the like. The method is simple, few in by-products and environmentally friendly. By adopting ion-doped birnessite as the catalyst, the method has the advantages of economy, environmental protection, mild conditions, high selectivity, easiness in recovery of the catalyst and the like; the ion-doped birnessite catalyst can efficiently and highly selectively catalyze oxidation of 5-hydroxymethylfurfural to prepare 2, 5-furandicarboxaldehyde, catalytic materials are easy to separate, the production cost is low, and the ion-doped birnessite catalyst has remarkable technical and economic effects and application prospects.

The invention discloses a preparation method of a vanadium battery electrolyte oxidation corrosion resistant composite membrane, which comprises the following steps: S1, uniformly dispersing graphene oxide nanosheets on the surface of an SPEEK (sulfonated polyether ether ketone) matrix by using sulfonated polyether ether ketone as a substrate to obtain an SPEEK / GO (graphene oxide) substrate; s2, treating the SPEEK / GO substrate in oxygen plasma treatment equipment, and ultrasonically cleaning the SPEEK / GO substrate with isopropanol for 10-20 minutes; s3, dissolving polybenzimidazole in N, N-dimethylacetamide (the concentration is 3-5wt%), and magnetically stirring until the polybenzimidazole is completely dissolved; the preparation method comprises the following steps: adding TiO2 nanoparticles (the particle size is 20-25nm, and the TiO2 nanoparticles are pretreated by a silane coupling agent KH-570) according to the mass ratio of 15-20%, ultrasonically dispersing and carrying out ice bath to obtain PBI-TiO2 dispersion liquid; s4, the SPEEK / GO substrate treated in the step S1 is vertically immersed in PBI-TiO2 dispersion liquid, the final coating thickness is 1.5 + / -0.2 [mu] m, and a pretreated film is obtained; and S5, carrying out hot pressing on the pretreated membrane by using a hot press, and then carrying out gradient cooling to room temperature to obtain the final composite membrane. The vanadium battery is better in vanadium resistance and corrosion resistance and suitable for high-power-density vanadium batteries.

The invention belongs to the technical field of near-infrared organic dye synthesis, and particularly discloses a cyanine dye with J aggregation characteristic, J aggregation nanoparticles, and preparation methods and applications of the cyanine dye and the J aggregation nanoparticles. The cyanine dye is 1-ethyl-2-(2-(2-(-3-(2-(1-ethyl-3, 3-dimethyl-1, 3-dihydro-2H-benzo [g] indole-2-subunit) ethylidene)-2-(2, 2, 2-trifluoro-N-(2-methylbenzyl) acetamide) cyclopent-1-ene-1-yl) vinyl)-3, 3-dimethyl-3H-benzo [g] indoleiodised salt, and the structural formula of the cyanine dye is shown in the description. The preparation method is simple, the J aggregation nanoparticles can be prepared by utilizing the unique property of J aggregation, the J aggregation nanoparticles have high light stability and have strong fluorescence emission in a near-infrared second region, and the material prepared by the invention can be used as a contrast agent and is applied to the field of near-infrared second region fluorescence imaging.

The invention discloses a preparation method of a spiro [4.5] trienone compound containing difluoro gamma-lactam, which comprises the following steps: reacting an N-(4-methoxyphenyl)-N-methyl-3-phenylpropanamide compound and an N-allyl-2, 2-difluoro-2-bromo-N-aryl acetamide compound in an argon atmosphere under the action of a photocatalyst and alkali to obtain the spiro [4.5] trienone compound containing difluoro gamma-lactam. And reacting under the irradiation of 467 nm blue light to obtain the spiro [4.5] trienone compound containing difluoro gamma-lactam. The reaction operation is simple and convenient, the product specificity is high, the substrate application range is wide, and the price is low. The invention provides a simple and efficient preparation method of the spiro [4.5] trienone compound containing difluoro gamma-lactam for the first time.