64 results about "Cyanoacetic acid" patented technology

The invention relates to a preparation method of 5-azaspiro [2.4] heptane-1-yl tert-butyl carbamate, which comprises the following steps: reacting 1-benzyl-3-pyrrolidone with methyl cyanoacetate to obtain an intermediate 1; reacting the intermediate 1 with nitromethane to obtain an intermediate 2; sequentially hydrolyzing the intermediate 2 under the action of an alkaline reagent and an acidic reagent to obtain an intermediate 3; reacting the intermediate 3 with diphenyl azide phosphate to obtain an intermediate 4; reacting the intermediate 4 with tert-butyl alcohol to obtain an intermediate 5; and carrying out hydrogenation reduction reaction on the intermediate 5 to obtain the 5-azaspiro [2.4] heptane-1-yl tert-butyl carbamate. The preparation method provided by the invention has the advantages of cheap and easily available raw materials, simple process operation, safe and controllable production and considerable yield, makes up for the shortage of the existing synthesis method, avoids the amplification danger, and can meet the requirements of large-scale industrialization.

The invention belongs to the technical field of fine chemical engineering, and discloses a synthesis method of a malonate compound, which comprises the following steps: under the action of a heterogeneous catalyst, carrying out hydrolysis-esterification reaction on cyanoacetic acid and alcohol, and after the reaction is finished, carrying out post-treatment to obtain the malonate compound, the heterogeneous catalyst comprises a carrier and an active component; the active component comprises ionic liquid and active metal; the carrier is an ordered mesoporous material; the active metal is alkaline earth metal. According to the method, malonate products can be obtained, the problems of low yield, serious equipment corrosion and large amount of three wastes are solved, efficient synthesis of malonate compounds is realized, meanwhile, the production efficiency is improved, and the environmental pollution is greatly reduced.

The application discloses a catalyst for preparing malononitrile, a preparation method of the catalyst and a method for preparing malononitrile by using the catalyst. The catalyst is a solid catalyst, which is an acidic catalyst loaded with rare earth metal oxide. The method for preparing malononitrile is that cyanoacetic acid or cyanoacetate or cyanoacetamide and an ammonia source are subjected to ammoniation dehydration reaction in a continuous reactor to prepare malononitrile according to a certain molar ratio. Then, vacuum distillation (20 torr-25 torr) is carried out, and a fraction collected at 110 DEG C-120 DEG C is malononitrile product. The ammonia source can be ammonia gas, ammonia water, ammonium carbonate or urea. The method for preparing malononitrile can reduce production cost, improve production safety, reduce the discharge amount of three wastes in the preparation of malononitrile by using an existing process, and improve product quality, and is a sustainable and green synthesis route.

This invention relates to the field of solid propellant technology, specifically disclosing a neutral polymer bonding agent, its preparation method, and its application in solid propellants. The neutral polymer bonding agent is prepared by polymerization of poly(hydroxyalkyl polyacrylate) and cyanoacetic acid as raw materials. It can achieve controllable molecular weight and controllable proportion of functional groups in the polymer. Moreover, the active group -CN in the neutral polymer bonding agent has low steric hindrance and is more easily adsorbed on the surface of ammonium nitrate particles, thereby improving the bonding effect.

The invention discloses an environment-friendly phenol-free thermo-sensitive paper label material and a preparation method thereof, and relates to the technical field of thermo-sensitive paper. When the environment-friendly phenol-free thermo-sensitive paper label material is prepared, cellulose sequentially reacts with cyanoacetic acid, 4-(2-chloroethyoxyl) benzophenone and N, N-dimethylpropyl-1-amine to prepare modified cellulose; the preparation method comprises the following steps: carrying out reaction on silicon dioxide and diethylenetriamine propyl trimethoxy silane to prepare pre-modified silicon dioxide; reacting the pre-modified silicon dioxide, phosphorous acid and formaldehyde to obtain modified silicon dioxide; uniformly mixing functional styrene-butadiene emulsion, modified cellulose, modified silicon dioxide, a color developing agent, a lubricating agent, a sensitizer and colorless pigment to prepare a thermosensitive coating; and uniformly coating the surface of thermosensitive base paper with the thermosensitive coating by using a coating machine, and drying to obtain the environment-friendly phenol-free thermosensitive paper label material. The environment-friendly phenol-free thermo-sensitive paper label material prepared by the invention has excellent wear resistance, antibacterial property, light resistance and flame retardance.

The invention discloses a water creatine synthesis method, and belongs to the technical field of water creatine synthesis, and the method comprises the following steps: slowly adding supercritical carbon dioxide as a solvent into glycine and cyanoacetic acid, adding a prepared supported zirconium sulfate catalyst, carrying out esterification reaction, cooling the obtained mixture to room temperature, adding the cooled mixture into deionized water, and carrying out vacuum drying to obtain the water creatine. A basic catalyst is added for a hydrolysis reaction, and a blend obtained after the hydrolysis reaction is cooled to the room temperature; putting the obtained blend into cold water for crystallization reaction, filtering and drying to obtain a crude product of water creatine; the preparation method comprises the following steps: adding a crude product of water creatine into methanol, heating and dissolving, filtering, cooling filtrate, carrying out centrifugal treatment, and carrying out vacuum drying on a solid substance after centrifugal treatment to obtain the water creatine. The preparation method has the beneficial effects that the zirconium oxide carrier is prepared by a sol-gel method, and the supported zirconium sulfate catalyst capable of replacing sulfuric acid is prepared; and the product yield and purity are greatly improved.

The present invention relates to a catalyst and a preparation method thereof. The catalyst comprises a mesoporous γ-Al2O3 / SiO2 support and an active component supported on the support. The active component is a complex formed by a metal salt and a modifier. The modifier is a reaction product of a first component selected from organic acids and / or inorganic acids and a second component selected from organic bases. The catalyst is weakly acidic. The present invention also relates to a method for synthesizing malonic ester compounds, comprising: mixing cyanoacetic acid, water and the catalyst and performing an activation treatment, then carrying out a hydrolysis reaction on the first mixed material obtained by the activation treatment in the presence of a catalyst for cyanoacetic acid hydrolysis reaction, and then adding an alcohol to the second mixed material obtained by the hydrolysis reaction to carry out an esterification reaction to obtain malonic ester compounds. The catalyst of the present invention can effectively solve problems such as low yield, serious equipment corrosion, and large amounts of "three wastes", and environmentally friendly and efficiently realizes the synthesis of malonic ester compounds.

The utility model discloses an analysis device for cyanoacetic acid high performance liquid chromatography, which belongs to the technical field of liquid chromatographs, and is characterized by comprising a liquid chromatograph body, a loading box is arranged at the top of the liquid chromatograph body, a support plate is fixedly connected onto the inner wall of the loading box, and the support plate is fixedly connected with the liquid chromatograph body. Three placing grooves are formed in the top surface of the supporting plate at equal intervals, reagent bottles are placed in the placing grooves, a protection mechanism used for limiting the reagent bottles is arranged on the top surface of the supporting plate, and a liquid collecting machine is arranged on the side wall of the carrying box. The protection mechanism can clamp and limit the reagent bottle placed in the placement groove, the reagent bottle is prevented from toppling over in the placement groove to cause outflow of a reagent in the reagent bottle, the liquid collection mechanism can collect the reagent leaked and flowing out from the interior of the reagent bottle, and meanwhile, the collected reagent can be conveniently cleaned.

The present invention relates to the field of organic dyes, and particularly to an azo disperse dye and a preparation method thereof. The method includes: 1. After the initial reaction of cyanoacetate and organic amine, continue to react with acetoacetate to prepare a pyridone compound; 2. Add an aromatic amine compound to an acid solution and carry out a diazotization reaction with a diazotizing reagent to obtain an aromatic amine diazonium salt solution; 3. Add the pyridone compound to the aromatic amine diazonium salt solution for a coupling reaction to obtain the product. The molecular structure of the azo disperse dye of the present invention has an alkyl chain segment with a "lipophilic-hydrophilic" structure, which is similar to the chain segment structure of polyester fiber and has high affinity, so it has good dyeing performance on fiber materials. At the same time, this alkyl chain segment can make the dye have good dispersibility in water, has the ability to wash off the floating color on the fiber surface, and has excellent wet treatment fastness performance on fiber materials.

The invention relates to the field of organic dyes, in particular to an azo disperse dye and a preparation method thereof.The method comprises the steps that firstly, cyanoacetate and organic amine are subjected to a primary reaction and then continue to react with acetoacetate, and a pyridone compound is prepared; 2, adding an arylamine compound into an acid solution, and then carrying out diazotization reaction on the arylamine compound and a diazotization reagent to obtain an arylamine diazonium salt solution; and 3, adding the pyridone compound into the arylamine diazonium salt solution, and carrying out a coupling reaction. According to the present invention, the molecular structure of the azo disperse dye has the alkyl chain link having the oleophylic-hydrophilic structure, is similar to the chain link structure of the polyester fiber, and has the high affinity, such that the good dyeing property on the fiber material is provided, and the alkyl chain link can provide the good dispersion of the dye in water so as to provide the good dyeing effect on the fiber material; the washing-off capability on surface dyeing of fibers is realized, and the wet-processing fastness performance on a fiber material is excellent.

The present invention discloses a controllable self-destructive hydrogel and a preparation method and application thereof, which belongs to the field of controllable self-destructive hydrogels. The preparation method is: adding a GO mixed functionalized polymer solution to a histidine solution to obtain the controllable self-destructive hydrogel; the GO mixed functionalized polymer solution is obtained by mixing a cyanoacetate functionalized polymer, a benzaldehyde functionalized polymer and a hydrophilic PEG or PEG derivative in a GO aqueous medium. The preparation process of the present invention is controllable, the preparation conditions are mild, and the gelation speed is fast. With the help of 3D printing technology, the construction and controllable degradation of complex three-dimensional structures, the storage and self-clearance of information, and the on-demand release of cells can be realized simultaneously, so it shows great application prospects in soft robots, anti-counterfeiting, controlled drug release and other related fields. The present invention has the advantages of simple preparation process, good formability, and sensitive response.

The present invention relates to a curable composition comprising:-a first component comprising an aldehyde group-containing compound comprising at least one compound having two or more aldehyde groups, and-a second component comprising a cyanoacetate group-containing compound comprising at least one compound having two or more aldehyde groups, the cyanoacetate group-containing compound comprises at least one compound having two or more cyanoacetate groups, and wherein the first component and the second component have an average molecular weight Mn in the range of 400 to 20000 g / mol in terms of the aldehyde group-containing compound or the cyanoacetate group-containing compound, and the average functionality of at least one of the two components is greater than 2.0 in terms of the aldehyde group-containing compound or the cyanoacetate group-containing compound. The composition is substantially free of toxic components and cures rapidly and without defects under ambient conditions using common catalysts to form non-viscous elastomeric polymers having high strength, high ductility and high tear propagation resistance. It is particularly suitable for use as elastic adhesives, sealants or coatings having high robustness during production, storage and processing and high durability after curing.

The present application relates to a method of preparing ethyl (R)-4-((1-(2-cyanoacetyl)piperidin-3-yl)amino)-1H-pyrrolo[2,3-b]pyridine-5-carboxylate (Compound 1). The process involves the addition of an ethyl carboxylate group, displacement of a halogen with a chiral amine, deprotection of the chiral, cyclic amine, and a subsequent coupling reaction with cyanoacetic acid. The displacement may be conducted in an autoclave at elevated pressure.

The invention discloses a preparation method and application of a SiO2 / loofah composite material synergistically modified by amino and amidoxime groups, comprising the steps of: modifying alkali pre-treated loofah and SiO2 nanoparticles respectively by epoxy silane to obtain epoxylated loofah and epoxylated SiO2 nanoparticles; ultrasonically dispersing the two in a solvent, performing composite cross-linking modification with a polyamine compound as a cross-linking agent to obtain an amino SiO2 / loofah composite material; then adding cyanoacetic acid and a catalyst to a solution containing the composite material for stirring reaction to obtain a cyanated SiO2 / loofah composite material with surface modified cyano groups; and then performing an amidoxime reaction to obtain an amino and amidoxime-synergistically modified SiO2 / loofah composite material. The invention improves the structural stability of the loofah matrix and exerts the synergistic adsorption effect of SiO2 nanomaterials, loofah, amidoxime groups and amino groups on uranium.

The invention provides a preparation method of 2, 4-diamino-6-hydroxy-5-nitroso pyrimidine, which comprises the following steps: (a) carrying out cyclization reaction on a sodium methoxide methanol solution, guanidine nitrate and methyl cyanoacetate in a reflux state, and concentrating to recover methanol after the reaction is completed; (b) adding water into the concentrated product for dissolving, and heating to 60-65 DEG C; adding sodium nitrite, stirring and dissolving to obtain cyclization liquid; (c) heating the sulfuric acid solution to 60-65 DEG C, dropwise adding the cyclization liquid and sulfuric acid into the sulfuric acid solution, and controlling the temperature to be 60-70 DEG C during dropwise adding; and filtering, washing and drying after the solid stops separating out. The product with the purity of 99.53% can be obtained, and the method is suitable for industrial production with high purity requirements; in the whole process, the reaction temperature and pressure are controlled mildly, and equipment requirements and safety risks caused by high temperature and high pressure are avoided; and the traditional complex recrystallization and multi-step purification process is simplified.

The present invention belongs to the technical field of solar energy industry, and specifically relates to a hole transport material containing halogen and its application as an organic hole transport material. The present invention designs a cyanoacetic acid or cyanophosphoric acid as an anchoring group, and introduces halogen into the molecular structure through a self-assembled monolayer strategy, thereby obtaining a new type of hole transport material containing halogen, the purpose of which is to solve the technical problems such as poor stability and poor device performance faced by existing organic small molecule hole transport materials with anchoring groups. In addition, the present invention also relates to a perovskite battery and a flexible perovskite battery prepared using the aforementioned organic hole transport material. The beneficial effect of the present invention is that the introduction of halogen atoms in the material can improve the stability of the battery and extend its service life.

The present invention relates to the field of organic synthesis, and particularly relates to a new method for synthesizing 2-chloro-6-nitrotoluene. The synthesis method of 2-chloro-6-nitrotoluene provided by the present invention uses 2,3-dichloronitrobenzene (Compound 1) as a raw material, reacts with methyl cyanoacetate or dimethyl malonate under the action of a reaction solvent and an acid-binding agent to form Compound 2, and after filtration and decolorization, a dilute acid solution is added for de-esterification reaction to obtain Compound 3. Finally, the R group is removed in a dilute acid solution to obtain the final product 2-chloro-6-nitrotoluene (Compound 4). The synthesis method of 2-chloro-6-nitrotoluene described in the present invention has the advantages of simple operation, safety, economy, environmental friendliness, and low cost.

The invention discloses a tire glazing agent and a preparation method thereof, and relates to the technical field of glazing agents. When the tire glazing agent is prepared, firstly, methyl ethyl ketoxime terminated polyurethane reacts with diaminothiourea, then reacts with 3-thiophenecarbonyl chloride and then reacts with thiophene to obtain modified polyurethane; secondly, reacting 3-aminopropyl polydimethylsiloxane with carbon disulfide and phosphorus oxychloride, then reacting with 4-aminobenzophenone, and finally reacting with methyl cyanoacetate to obtain modified silicone oil; finally, the modified polyurethane emulsion, the modified silicone oil, liquid wax, solvent oil, pure water, ethylene glycol, methyl cellulose and sodium dodecyl benzene sulfonate are added. The tire glazing agent prepared by the invention has good antibacterial property and antistatic property.

The present invention discloses an interface modification material, a fully printed carbon-based perovskite cell, and a preparation method thereof. The interface modification material preparation process is as follows: Br-NI is prepared using 4-bromo-1,8-naphthoic anhydride and 3-aminopentane as raw materials; a degassed mixture of THF and an aqueous potassium carbonate solution is added to a mixture of Br-NI, 5-(4,4,5,5-tetramethyl-1,3,2-dioxabicyclo-2-yl)thiophene-2-carboxaldehyde, and tetrakis(triphenylphosphine)palladium, and the mixture is stirred under an argon atmosphere for complete reaction, followed by post-processing to obtain CTNI; CTNI, cyanoacetic acid, and piperidine are mixed in anhydrous chloroform and stirred under an argon atmosphere for complete reaction, followed by post-processing to obtain a CATNI interface modification material. The present invention also discloses a carbon-based perovskite solar cell, which comprises, from bottom to top, a conductive substrate, an electron transport layer, an interface modification layer, a perovskite layer, a hole transport layer, and a carbon electrode. The present invention significantly improves the voltage and efficiency of the device through modification of the interface modification layer, thereby improving the performance of the perovskite cell.

The invention provides a synthesis method of L-3-aminoisobutyric acid. The synthesis method comprises the following steps: enabling a dichloromethane solution of cyanoacetic acid to react with oxalyl chloride; a reaction product, (S)-4-benzyl-2-oxazolidinone dissolved in dichloromethane and triethylamine are respectively fed into a continuous flow reactor to be mixed and react with the (S)-4-benzyl-2-oxazolidinone dissolved in dichloromethane; collecting reaction liquid, extracting, concentrating and recrystallizing to obtain a compound 2; dissolving the compound 2 in tetrahydrofuran, and adding iodomethane; respectively feeding the mixed solution and a tetrahydrofuran solution of lithium diisopropylamide into a continuous flow reactor for mixing reaction; collecting reaction liquid, quenching and purifying to obtain a compound 3; dissolving the compound 3 in a mixed solvent of an organic solvent and water, adding lithium hydroxide and hydrogen peroxide, and reacting; adding a sodium sulfite aqueous solution for quenching reaction, extracting, concentrating and purifying to obtain a compound 4; dissolving a compound 4 in ethanol, and carrying out a continuous flow hydrogenation reaction with hydrogen through a continuous flow hydrogenation reactor; and collecting a reaction product, concentrating, cooling and crystallizing to obtain the L-3-aminoisobutyric acid.

The invention relates to the technical field of high polymer materials, in particular to modified hydrogenated butadiene-acrylonitrile rubber with high cyano content as well as a preparation method and application of the modified hydrogenated butadiene-acrylonitrile rubber. The modified hydrogenated butadiene-acrylonitrile rubber contains a cyanoacetate side chain segment, and the molar content of cyano groups in the modified hydrogenated butadiene-acrylonitrile rubber is greater than or equal to 40%. According to the modified hydrogenated nitrile rubber with the high cyano content, a cyanoacetate side chain is introduced through the ring-opening reaction of the epoxidized hydrogenated nitrile rubber and cyanoacetic acid, the novel hydrogenated nitrile rubber is prepared, the cyano content can be regulated and controlled by controlling the acrylonitrile content and the epoxidation degree of original rubber, the cyano content can reach 56%, and the cyano content can reach 50%. And the material can be endowed with excellent oil resistance.

The application provides a continuous production device and method of methyl cyanoacetate, which comprises a feeding unit, a reaction unit and a post-treatment unit connected in sequence, the reaction unit comprises a tubular reactor, the lower part of the tubular reactor is provided with a methanol feeding port and a sodium cyanide feeding port, the top of the tubular reactor is provided with a methyl chloroacetate feeding port, and the bottom of the tubular reactor is provided with a methyl cyanoacetate crude product discharging port; the feeding unit comprises a methanol feeding device, a sodium cyanide feeding device and a methyl chloroacetate feeding device, and the methanol feeding device, the sodium cyanide feeding device and the methyl chloroacetate feeding device are connected with the methanol feeding port, the sodium cyanide feeding port and the methyl chloroacetate feeding port respectively. The tubular reactor is used for continuous production, compared with the traditional batch production mode of the reaction kettle, the problem of sodium cyanide solid feeding is solved, the occurrence of the reverse reaction is effectively inhibited, and the yield of methyl cyanoacetate is greatly improved.

The utility model relates to the technical field of dehydration, and discloses a novel cyanoacetic acid dehydration device which comprises an incoming material input pump, the incoming material input pump is connected with a preheating mechanism through a pipeline, the preheating mechanism comprises a water storage tank, an electrical bar, a flow guide pipe, a spherical shell and heat collection fins, the electrical bar is installed in the water storage tank, the flow guide pipe is installed in the water storage tank, and the spherical shell is installed in the spherical shell. The left end of the flow guide pipe is connected with the incoming material input pump through a pipeline, the right end of the flow guide pipe is connected with an inlet of the horizontal film evaporator through a pipeline, a plurality of spherical shells are arranged on the flow guide pipe, a steam outlet is formed in the upper right portion of the horizontal film evaporator, and a concentrated solution outlet is formed in the lower right portion of the horizontal film evaporator. The steam outlet is connected with an inlet of the first-stage condenser through a pipeline, and an outlet of the first-stage condenser is connected with an inlet of the second-stage condenser through a pipeline. According to the cyanoacetic acid dehydration device, cyanoacetic acid is preheated firstly, and then the film evaporator is used for rapidly dehydrating the cyanoacetic acid, so that moisture in the cyanoacetic acid is conveniently, rapidly and fully removed.

The invention relates to a preparation method of 7-methoxynaphthalene acetonitrile. The preparation method comprises the following steps: reacting 7-methoxy-1-tetralone with copper bromide under the action of a catalyst to generate 7-methoxy-2-bromo-1,2,3,4-tetralone; reacting 7-methoxy-2-bromo-1,2,3,4-tetralone under the catalysis of a heteropoly acid to obtain 7-methoxy-1,4-dihydronaphthalone; and directly condensing 7-methoxy-1,4-dihydronaphthalone with cyanoacetic acid in the presence of benzylamine and heptanoic acid to obtain 7-methoxynaphthalene acetonitrile. The preparation method of the catalyst comprises the following steps: mixing carrier particles and a metal salt solution, adjusting the pH to alkaline, washing, drying, immersing in a sulfuric acid solution, filtering, and then roasting to obtain the catalyst. The carrier particles are aluminum oxide or silicon dioxide, and the metal salt solution is a salt solution of Zr, Ti or Sn. The method reduces the difficulty of purification, improves the yield and purity, and reduces the cost.

The invention relates to a ternary lithium battery electrolyte and a preparation method and application thereof, and belongs to the technical field of lithium battery materials. By synthesizing the ester compound with sulfonate, cyanoacetate and a phosphorus-containing branched structure, the comprehensive performance of the electrolyte can be effectively improved, the branched structure is beneficial to reducing the viscosity of the electrolyte, and the ester bond is beneficial to improving the compatibility of the additive and an electrolyte system, so that the proton motion resistance is reduced, the activation energy of ion migration is reduced, and the service life of the electrolyte is prolonged. And sulfonate, cyanoacetate and phosphorus atom centers can further improve the conductivity of the electrolyte. The ternary lithium battery electrolyte provided by the invention has good conductivity in both room-temperature and low-temperature environments, and provides a good basis for the use of a lithium battery in the low-temperature environment.

The invention relates to the technical field of instant adhesives, and particularly discloses a synthesis method of a medical cyanoacrylate adhesive with low formaldehyde residue, which adopts a method of adding a formaldehyde reaction removal agent after the condensation polymerization of cyanoacetate and formaldehyde is finished to effectively remove the formaldehyde which is not completely reacted, so that the formaldehyde residue is reduced. The method provided by the invention has the advantages that the formaldehyde residue in the alpha-cyanoacrylate is obviously reduced, the clinical use safety of the alpha-cyanoacrylate is improved, and the method provided by the invention is simple and easy to operate; meanwhile, the requirement on equipment is not high, the investment is less, and the process is simple, convenient and very economical.

The invention discloses a tire polish and a preparation method thereof, and relates to the technical field of polishes. When preparing the tire polish, the present invention first reacts a polyurethane terminated with methyl ethyl ketoxime with diaminothiourea, then reacts with 3-thiophenecarbonyl chloride, and then polymerizes with thiophene to obtain a modified polyurethane; secondly, 3-aminopropyl polydimethylsiloxane is reacted with carbon disulfide and phosphorus oxychloride, then reacts with 4-aminobenzophenone, and finally reacts with methyl cyanoacetate to obtain a modified silicone oil; finally, a modified polyurethane emulsion, modified silicone oil, liquid wax, solvent oil, pure water, ethylene glycol, methylcellulose, and sodium dodecylbenzenesulfonate are reacted. The tire polish prepared by the present invention has good antibacterial and antistatic properties.

The application discloses a modified lithium-rich manganese-based positive electrode material and a preparation method and application thereof, and belongs to the technical field of positive electrode materials. The preparation method comprises the following steps: (1) adding an acid with high electronegativity into a solvent to obtain an acid solution; adding a MOF material into the acid solution, heating and reacting for a set time, and then performing solid-liquid separation to obtain a MOF material containing a high-electronegativity anion group; wherein the acid with high electronegativity is one or more of trifluoromethanesulfonic acid, trinitrobenzenesulfonic acid and cyanoacetic acid; (2) mixing the MOF material containing the high-electronegativity anion group with a lithium-rich manganese-based positive electrode material in a solid phase to obtain a modified lithium-rich manganese-based positive electrode material. In the application, the MOF material is treated by the acid with high electronegativity and then is compounded with the lithium-rich manganese-based positive electrode material, so that the ion transmission rate of the interface of the positive electrode material can be effectively improved, the polarization phenomenon of the positive electrode material can be reduced, and the rate performance of the material can be improved.

The application discloses a kind of double carbazole compounds and its preparation method and co-sensitization application, specific preparation process is compound shown in formula II-1, formula II-2, formula II-3, formula II-4 or formula II-5 and cyanacetic acid are dissolved in solvent, basic substance is added, heated reflux reaction under stirring, after reaction, reaction liquid is concentrated to remove solvent, the obtained concentrate is dissolved in eluent and separated and purified by column chromatography silica gel, eluent is collected and eluent is evaporated, i.e. the target product such as compound of formula DSB-1, formula DSB-2, formula DSB-3, formula DSB-4 or formula DSB-5 is prepared, and it is used for preparing dye sensitization agent, the application is connected by alkyl chain double carbazole, and benzothiadiazole acceptor and aromatic heterocycle are introduced in a carbazole, another carbazole is introduced as bridge bond, cyanacetic acid is used as acceptor, double carbazole compound is synthesized, and new applicable material is added for the screening of dye sensitization agent.

The invention discloses a preparation method and application of an amino and amidoxime synergistic modified SiO2 / loofah sponge composite material, and the preparation method comprises the following steps: respectively modifying loofah sponge pretreated by alkali liquor and SiO2 nanoparticles by epoxy silane to obtain epoxidized loofah sponge and epoxidized SiO2 nanoparticles; ultrasonically dispersing the SiO2 and the loofah sponge in a solvent, and performing composite cross-linking modification by taking a polyamine compound as a cross-linking agent to obtain an aminated SiO2 / loofah sponge composite material; then adding cyanoacetic acid and a catalyst into a solution containing the composite material, and carrying out stirring reaction to obtain a cyanation SiO2 / loofah sponge composite material with the surface modified with cyano groups; and carrying out an amidoximation reaction on the loofah sponge to obtain the amino and amidoxime synergistic modified SiO2 / loofah sponge composite material. The structural stability of the loofah sponge matrix is improved, and the synergistic adsorption effect of the SiO2 nano material, the loofah sponge, the amidoxime group and the amino group on uranium is exerted.