200 results about "Tetramine" patented technology

The invention relates to the field of quantum dot ink, and discloses diffusion plate printing quantum dot ink and a preparation method thereof.The diffusion plate printing quantum dot ink comprises acrylic resin, hyperbranched polyester resin, a quantum dot material, modified boron nitride, a reactive diluent, a photoinitiator, a wetting agent and a defoaming agent; the hyperbranched polyester resin is prepared by reacting hyperbranched polyester acrylate and a sulfydryl-terminated silicon-containing reaction monomer, wherein the hyperbranched polyester acrylate is prepared by reacting pentaerythritol with 2, 2-dimethylolpropionic acid and then carrying out esterification reaction with acrylic acid; the sulfydryl-terminated silicon-containing reaction monomer is prepared by reacting eugenol with 1, 1, 3, 3-tetramethyldisiloxane and then carrying out esterification reaction with 3-mercaptopropionic acid; the modified boron nitride is prepared by modifying a cationic polymer which is prepared by carrying out a Mannich reaction on triethylene tetramine, formaldehyde and acetone and then carrying out a condensation polymerization reaction with formaldehyde. After the ink prepared by the invention is cured, a coating film is high in hardness, adhesive force and heat conductivity coefficient, and good in flexibility, heat resistance and migration barrier property.

The invention discloses a photovoltaic POSS (polyhedral oligomeric silsesquioxane)-containing antireflection film coating liquid and a preparation method thereof, the coating liquid comprises the following raw materials in parts by weight: 80-100 parts of modified emulsion, 10-15 parts of modified graphene, 3-5 parts of sodium dodecyl benzene sulfonate, 1-3 parts of triethylene tetramine and 40-60 parts of deionized water, a modified additive in the coating liquid contains a polyhedral oligomeric silsesquioxane structure, the polyhedral oligomeric silsesquioxane structure can form uniformly-distributed nanopores and is matched with a two-dimensional honeycomb lattice structure in the graphene oxide, the surface roughness can be increased, the microstructure can scatter incident light and reduce specular reflection, so that the surface light transmittance is improved, and meanwhile, the modified additive molecule contains a fluoroalkyl structure, so that the surface light transmittance is improved. The fluoroalkane has a high refractive index, so that light reflection can be reduced, and the light transmittance is further improved.

The invention discloses a nitrogen-doped zinc ion battery manganese-based positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing a strong oxidant and a manganese salt, putting the mixture into a beaker, adding deionized water, and uniformly stirring to form a mixed solution; transferring the mixed solution into a high-pressure reaction kettle with a polytetrafluoroethylene lining, and heating the high-pressure reaction kettle in a drying oven; cooling, precipitating, filtering and washing for multiple times, and then putting into a drying oven for vacuum drying to obtain an original manganese-based positive electrode material; the preparation method comprises the following steps: respectively weighing an original manganese-based positive electrode material and hexamethylenetetramine, flatly laying the original manganese-based positive electrode material at the bottom of a lining of a reaction kettle, and putting the hexamethylenetetramine into a beaker; and putting the beaker into a reaction kettle, moving the beaker and the reaction kettle into a drying oven, and heating to obtain the surface nitrogen-doped manganese-based positive electrode material.

The invention discloses weather-resistant water-based two-component epoxy paint and a preparation method thereof, and belongs to the technical field of paint. The weather-resistant water-based two-component epoxy paint comprises a component A and a component B, the component A comprises 50-70 parts by mass of a modified waterborne epoxy emulsion, 3-6 parts by mass of a pigment, 7-13 parts by mass of a modified filler, 0.3-1.5 parts by mass of a wetting dispersant, 2-4 parts by mass of a coalescing agent, 0.1-0.5 part by mass of a defoaming agent, 0.5-5 parts by mass of water and 0.5-1 part by mass of a leveling agent; the component B comprises 35-65 parts by mass of a modified curing agent, 10-20 parts by mass of ethanol and 30-40 parts by mass of water; the component A and the component B are mixed according to the mass ratio of 100: (20-30); the modified curing agent is obtained by reacting polyethylene glycol diglycidyl ether, epoxy resin, triethylene tetramine, functional organic silicon and phenyl glycidyl ether; the modified filler is obtained by modifying nano silicon dioxide with poly (m-xylylenediamine) and a silane coupling agent KH560; the modified water-based epoxy emulsion is a phytic acid modified water-based epoxy emulsion.

The invention discloses a self-lubricating aluminum coating and a preparation method thereof.The preparation method comprises the steps that molybdenum disulfide is pretreated through a silane coupling agent, tetraethoxysilane mixed liquor is added, the pH is adjusted to be 9-10, a water bath reaction is conducted, and molybdenum disulfide-silicon dioxide microcapsules are obtained after high-temperature strengthening treatment; respectively adding a zinc nitrate solution and a hexamethylenetetramine solution, adjusting the pH value to 10-11, carrying out a high-temperature and high-pressure hydrothermal reaction to obtain zinc oxide nanorods, and carrying out ball milling treatment on the zinc oxide nanorods, microcapsules, stearic acid and zirconium oxide balls under the protection of argon to obtain doped microcapsules; after raw materials are pretreated, the raw materials and a dispersing agent solution are added into a mixer respectively, spraying powder, a pretreated base body and the spraying powder are obtained after mixing treatment, spraying treatment is conducted on the surface of the base body through a plasma spraying method, and the self-lubricating aluminum coating is obtained after vacuum annealing treatment. Therefore, the obtained self-lubricating aluminum coating is low in friction coefficient, high in performance and excellent in self-lubricating property.

The preparation method comprises the following steps: weighing oleic acid and a catalyst, adding the weighed oleic acid and catalyst into a reaction container, heating by stages by adopting a programmable electric heating jacket, respectively dropwise adding a water carrying agent at 80-100 DEG C, dropwise adding diethylenetriamine or triethylene tetramine at 110-130 DEG C, controlling the reaction temperature and time, and reacting for 2-4 hours to obtain the compound corrosion inhibitor for the CO2 oil displacement produced liquid. After water is separated out, further reaction is carried out at 200-230 DEG C, then the system is cooled to 60-70 DEG C, a quaternization reagent is added for reaction, and a corrosion inhibitor E and a corrosion inhibitor S are prepared respectively; finally, the corrosion inhibitor E and the corrosion inhibitor S are compounded according to a certain proportion, and the compound corrosion inhibitor for the CO2 oil displacement produced liquid is obtained. The preparation method is simple and easy to implement, and the cost can be reduced; when the prepared corrosion inhibitor is applied to CO2 oil displacement produced liquid corrosion inhibition, an excellent corrosion inhibition effect can be shown, and corrosion hazards in CO2 oil displacement application are greatly reduced.

The invention relates to the field of metal powder material preparation, in particular to silver-coated copper powder with low-temperature sintering activity and a preparation method and application thereof.The preparation method comprises the following steps that copper powder, a reducing agent, a complexing agent composition and a silver plating solution are mixed and react, and the silver-coated copper powder is obtained; the complexing agent composition comprises at least two of ammonia water, triethylene tetramine, ethylenediamine, diethanol amine, benzimidazole, tartaric acid, nitrilotriacetic acid, ethylenediamine tetraacetic acid, disodium ethylene diamine tetraacetate, tetrasodium ethylene diamine tetraacetate and glycine. The preparation method disclosed by the invention is short in process flow, relatively low in cost, capable of keeping good batch stability and easy for industrial production; according to the obtained silver-coated copper powder, under the condition that the silver content is low, the completeness and compactness of a silver layer on the surface of the copper powder are good, the oxidation resistance is high, the service reliability of the silver-coated copper powder is improved, the production cost is saved, and the silver-coated copper powder further has good low-temperature sintering activity.

The invention provides a tracer agent for an oil field and a method for evaluating oil production contribution of each section of a horizontal well, and belongs to the technical field of oil field development. The tracer agent for the oil field, provided by the invention, is prepared from white oil, a nonionic surfactant, 3-allyloxy-2-hydroxy propanesulfonic acid sodium salt and alcohols; wherein the rare earth metal salt, the complexing agent and the sodium 3-allyloxy-2-hydroxy propanesulfonate form a complex; the complexing agent is a mixture of glycolic acid, triethylene tetramine and sodium dimercaptopropanesulfonate in a mass ratio of 10: (3-5): (1-2). The tracer agent for the oil field can stably exist under complex stratum conditions and can resist hypersalinity; in the process of evaluating the oil production contribution of each section of the horizontal well by using the tracer agent for the oil field, different types and different dosages of tracer agents are selected for different layer sections, so that the evaluation of the oil production contribution of each section of the horizontal well can be realized, and an effective basis is provided for subsequent refracturing.

To provide an electrolytic silver germanium alloy plating solution capable of codepositing a sufficient amount of germanium in a film, having good liquid stability, and hardly causing foaming.SOLUTION: The problem is solved by an electrolytic silver germanium alloy plating solution containing a silver source and a germanium source characterized by containing a nitrogen-containing coordination compound having a molecular weight of 500 or less. Specific examples of the nitrogen-containing coordination compound include N,N-di(2-hydroxyethyl)glycine, diethanolamine, N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid, triethylenetetramine, glycine, tris(hydroxymethyl) aminomethane, N-methylglucamine, bis(2-hydroxyethyl)aminotris(hydroxymethyl)methane, tricin, N,N,N',N'-tetrakis(2-hydroxypropyl)ethylenediamine, and salts of these compounds.SELECTED DRAWING: None

The invention discloses a reagent combination, an analyzer and a detection method for detecting beryllium element content in a water sample. The reagent combination is composed of a color developing agent, a masking agent, a buffer solution and a catalytic solution. The color developing agent comprises chrome cyanine R; the masking agent comprises EDTA (Ethylene Diamine Tetraacetic Acid), ascorbic acid, tartaric acid and ethylene glycol amine; the buffer solution comprises ammonium acetate and hydrochloric acid; the catalytic liquid comprises hexadecylpyridinium chloride. Compared with a standard method, the adopted reagents have the advantages that the reaction steps are simplified, the stability of the reagents is better, the shelf life is longer, the reagents such as ammonia water and hexamethylenetetramine used in the standard method not only have pungent smell and larger environmental pollution, but also are easy to volatilize and deteriorate, and are not beneficial to long-term storage, so that the long-term measurement result is deviated, and the accuracy of the detection result is improved. Reagents used in the method do not have the defects, and can be stored for a long time at normal temperature, so that the method can be suitable for unattended automatic instruments and automatic water quality monitoring stations.

The invention relates to the technical field of fracturing fluids, in particular to a novel environment-friendly fracturing fluid and a preparation method thereof. The fracturing fluid is prepared from the following components in parts by weight: 90 to 95 parts of deionized water, 1 to 3 parts of modified nano cellulose-montmorillonite composite powder, 0.1 to 0.3 part of a foaming agent, 0.2 to 0.8 part of a thickening agent and 0.5 to 1.5 parts of a cross-linking agent. The modified nanocellulose-montmorillonite composite powder is prepared by activating carboxylated nanocellulose, crosslinking the activated carboxylated nanocellulose with carboxylic acid-polyethylene glycol-carboxylic acid and triethylene tetramine, and compounding and intercalating modified montmorillonite. The prepared novel environment-friendly fracturing fluid has good foaming capacity, excellent sand-carrying capacity and good stability at different temperatures, the raw materials are environmentally friendly, the pollution risk to the environment is reduced, the novel environment-friendly fracturing fluid is suitable for fracturing construction under various reservoir conditions, and the oil and gas exploitation efficiency can be improved.

The invention discloses lignin-based hard carbon and a preparation method thereof.The preparation method comprises the steps that triethylene tetramine is grafted to the surface of lignin through Mannich reaction, then dithio-amino is grafted to the surface of the lignin through esterification reaction, and the lignin-based hard carbon is obtained by grafting dithio-amino groups to the surface of the lignin. On one hand, the adsorption capacity of the lignin to metal ions is improved, and on the other hand, the electrochemical performance of the lignin is improved by doping N and S elements into the lignin; the rate capability of the hard carbon is related to the electronic conductivity of the hard carbon and the transmission rate of Na < + > in the hard carbon, the carbonization material and the crystalline flake graphite powder are blended, the electronic conductivity is improved, meanwhile, the layered structure of the crystalline flake graphite powder is beneficial to the transmission of Na < + >, and the performance of the hard carbon is improved. Furthermore, the electrochemical performance of the lignin-based hard carbon is further improved.

The present disclosure provides a preparation method of a porous hydrogel adsorbent based on Radix astragali residues, including the following steps: subjecting residues of Chinese herbal medicine Radix astragali as a precursor to bleaching with NaClO2, alkaline washing with KOH, and high power ultrasonic treatment, thereby obtaining a precursor solution of uniformly dispersed cellulose nanofibers (CNFs); adding the precursor solution of CNFs to a mixed solution of N,N′-methylene bisacrylamide (MBA), acrylic acid (AA) and ammonium persulfate (APS), shaking evenly, and initiating a polymerization reaction at a predetermined temperature to form a monolithic gel; and cleaning the monolithic gel, putting the cleaned monolithic gel into a dimethyl sulfoxide (DMSO) solution containing epichlorohydrin to allow reaction, and transferring the product of the reaction to an aqueous sodium hydroxide solution containing triethylene tetramine to allow reaction, thereby finally obtaining an amino-functionalized porous hydrogel adsorbent.

The present invention describes a new crystalline form of triethylenetetramine tetrachloride which has improved room temperature stability over known forms and over the dichloride salt. The new crystalline form is characterised by having peaks in an XRPD spectrum at 22.9, 25.4, 25.8, 26.6, 34.6 and 35.3±0.1°2θ and Raman shifts 943, 1173, 1527 and 1612±5 cm−1. The crystalline form of triethylenetetramine tetrachloride is useful in the treatment of Wilson's disease.

The present application relates to a kind of carbon dioxide mineralization method and carbon dioxide mineralization device.The carbon dioxide mineralization method includes the following steps: mixing absorption liquid and industrial solid waste at room temperature, obtain mortar;Make mortar solid-liquid separation, obtain clear liquid and thick slurry;Carbon dioxide in flue gas is absorbed by clear liquid, obtain carbon-rich absorption liquid;Carbon-rich absorption liquid and thick slurry occur mineralization reaction at 180 DEG C-220 DEG C, obtain mineralized slurry;Make mineralized slurry solid-liquid separation, obtain mineralized ash and mineralized clear liquid;Wherein, absorption liquid includes inorganic base and organic base, organic base includes monoethanolamine, diethanolamine, triethanolamine, 3-methylaminopropylamine, N-methyl diethanolamine, piperazine, diethylene triamine, triethylene tetramine, tetraethylene pentamine and 2-amino-2-methyl-1-propanolamine at least two kinds.The method greatly improves CO2 capture rate and CO2 utilization rate, and organic base consumption is less, absorption liquid regeneration energy consumption is low, and overall economy is good.

The present application belongs to the technical field of silica sol preparation, and particularly relates to a silica sol preparation method using ion exchange method. In the prior art, the silica sol growth time is shortened by optimizing the preparation and impurity removal process, and the silica sol seed mother liquor is prepared under ultrasonic assistance. The organic alkali catalyst maintains the silica sol growth pH and the metal ions in the complex solution, so that the impurities are reduced during the silica sol growth. After the introduction of dodecyltrimethoxysilane, hexadecyltrimethoxysilane and methyltrimethoxysilane as the hydrophobic group surface modification, the impurity metal ions are filtered through the complexing agent and the ammonium type resin. The three ethylene tetramine ethanol solution modifies the ammonium type resin, enhances the selective adsorption of the resin to the metal ions, and the maleic anhydride crosslinking agent and nano silicon dioxide modify the ammonium type resin, increase the service life of the ammonium type resin. The prepared silica sol has high purity, good mechanical properties and dispersibility, and excellent hydrophobic performance.

To provide a novel crystalline form of triethylenetetramine tetrachloride which has improved room temperature stability over known forms and over the dichloride.SOLUTION: The novel crystalline form has peaks at 22.9, 25.4, 25.8, 26.6, 34.6, and 35.3±0.1°2θ in an XRPD spectrum, and Raman shifts at 943, 1173, 1527, and 1612±5 cm-1. The crystalline form of triethylenetetramine tetrachloride is useful in the treatment of Wilson's disease. There is also provided a method for producing a crystalline form of triethylenetetramine tetrachloride, the method comprising adding an antisolvent to an aqueous solution of the compound.SELECTED DRAWING: None

The invention relates to the technical field of paper wet strength agents, in particular to an environment-friendly wet strength agent and a preparation method thereof. The preparation method of the wet strength agent comprises the following steps: under the action of a catalyst, succinic acid, maleic acid and triethylene tetramine react to obtain an unsaturated polyamide polyamine prepolymer; adding water into the unsaturated polyamide polyamine prepolymer to adjust the solid content, heating, adding double-bond-containing nanocellulose, tea saponin, glycidyl acrylate and an initiator, and reacting to obtain an intermediate emulsion; cooling the intermediate emulsion to room temperature, adding epichlorohydrin to react for 0.5-3 hours, heating to 50-75 DEG C, continuing to react for 1-5 hours, cooling reaction liquid to 25-30 DEG C, adding glyoxal to react for 0.5-1 hour, adjusting the pH value of the reaction liquid after the reaction is completed, and adding water to adjust the solid content, thereby obtaining the product. The preparation method is simple in process, and the prepared wet strength agent can reduce organic chlorine residues.

The invention relates to the technical field of zinc hydrometallurgy, and discloses an analysis method for measuring high cobalt content by an EDTA complexing back titration method, which is based on the following steps: oxidizing Co < 2 + > into Co < 3 + > by using potassium nitrite in an acetic acid medium to form cobalt potassium nitrite precipitate so as to realize separation of cobalt and interfering ions, dissolving the precipitate, complexing with excessive EDTA, and performing back titration by using a zinc standard solution. Xylenol orange is used as an indicator, and determination is completed at room temperature in a hexamethylenetetramine buffer system with the pH value being approximately equal to 5.8. Coexisting ion interference is effectively eliminated through tartaric acid, sodium fluoride, thiourea and other masking agents, the method has the advantages of being easy and convenient to operate, sensitive in end point, high in accuracy and low in cost, and the requirement for conventional analysis of high-cobalt materials can be met.

The invention discloses a magnesium carbonate crystal prepared based on hexamethylenetetramine and a preparation method thereof, and belongs to the technical field of magnesium carbonate materials. The preparation method comprises the following steps: dissolving urea and magnesium chloride, adding hexamethylenetetramine, oscillating in water bath ultrasonic to fully react, then transferring the reaction system into a hydrothermal reaction kettle to perform hydrothermal reaction, and washing and drying a reactant to obtain magnesium carbonate crystals. According to the invention, magnesium chloride and urea are taken as raw materials, hexamethylenetetramine is taken as an additive, the nucleation-growth process is directionally regulated by the hexamethylenetetramine additive, and an optimized reaction process is adopted, so that the magnesium carbonate crystal with high purity, good crystallinity and an excellent pore structure is successfully synthesized; the prepared magnesium carbonate crystal has an optimized porous structure. According to the structure, the mass transfer efficiency is effectively improved, diffusion and transmission of substances in the material are facilitated, and the preparation method is simple and has wide application potential.

The invention discloses a metal oxide grafted with nitrile functional groups on the surface and a preparation method and application thereof.The preparation method comprises the following steps that S10, a metal compound precursor and a lithium source are evenly mixed in a mortar, the temperature of the mixture is increased to 800-900 DEG C, the mixture is naturally cooled to the room temperature, and the metal oxide is obtained; s20, weighing a metal oxide and laying the metal oxide at the bottom of the reaction kettle; s30, weighing hexamethylenetetramine, putting the hexamethylenetetramine into a beaker, and then putting the beaker into a reaction kettle containing a metal oxide; s40, the reaction kettle is sealed, a heat treatment reaction is conducted at the temperature of 200-250 DEG C, the heat treatment time is 3-12 h, and nitrile functional groups are generated in decomposition gas of hexamethylenetetramine; and S50, after the reaction is completed, cooling to room temperature, and sintering at 350-600 DEG C to obtain metal oxide powder grafted with nitrile functional groups on the surface.

This invention proposes a method for preparing and applying an indium sulfide photocatalytic material with specific vacancies. The method involves forming a first solution with ethanol and deionized water; dissolving InCl3·4H2O and thioacetamide, or InCl3·4H2O, thioacetamide, and hexamethylenetetramine, in the first solution by stirring; obtaining a clear solution; reacting the clear solution at a constant temperature; cooling after the reaction; and collecting the product by centrifugation; washing the product; and drying it at a constant temperature; finally, obtaining the photocatalytic material with specific vacancies. This invention introduces vacancies into In2S3, thereby regulating the surface active sites, enhancing its light utilization efficiency and the separation and transfer ability of photogenerated carriers, and improving the photocatalytic activity of N2 to NH3 reduction.

The invention provides a preparation method and application of a dopamine hydrochloride modified cerium oxide core-shell abrasive, comprising the following steps: adding water to a cerium salt until the cerium salt is completely dissolved, taking out a silica powder with a mass ratio of cerium salt to silica powder of (0.5:1)-(7:1), ultrasonically dispersing the powder in anhydrous ethanol to obtain a dispersion; mixing the dispersion with a hexamethylenetetramine aqueous solution and a cerium salt aqueous solution, heating and stirring the dispersion in an oil bath to obtain a mixed solution, centrifuging the mixed solution, washing with deionized water and anhydrous ethanol, and drying the mixed solution to obtain a mixed solid, calcining the mixed solid to obtain a cerium precursor; dispersing the cerium precursor in a mixed solution obtained by deionized water and ethanol, slowly adding dopamine hydrochloride and a buffer solution, stirring the solution, centrifuging, washing, and drying the solution to obtain a cerium precursor; and preparing a polishing liquid using the abrasive to obtain a removal rate of 0.1458 mg / min.

The invention belongs to the technical field of chemical separation, and relates to a layered bimetal oxide surface modified waste pollen biomass and a preparation method thereof.The preparation method comprises the steps that soluble magnesium salt and lanthanum salt are added into deionized water and ultrasonically dispersed to be uniform, then hexamethylenetetramine is added and ultrasonically dispersed to be uniform, PL-coated Al2O3 is added, a mixed solution is transferred into a reaction kettle, a reaction is conducted for 8-36 h at the temperature of 80-160 DEG C, and the layered bimetal oxide surface modified waste pollen biomass is obtained; after the reaction kettle is cooled to the room temperature, centrifugal separation is conducted, deionized water is used for washing till supernate is neutral, then a powdery product is collected and dried, and the waste pollen biomass PL (at) Mg / La-LDH with the surface modified by the layered bimetal oxide is obtained. The prepared adsorbent is applied to adsorption removal of phosphate in a water body. The adsorbent with the hierarchical structure is obtained through in-situ surface modification by taking the waste biomass as a precursor, the defect of poor adsorption effect of pure biomass can be overcome, the specific surface area of the adsorbent can be increased, the adsorption removal effect of phosphate in a water body can be improved, and the adsorbent has a relatively good application prospect.

A method of cleaning a fouled reverse osmosis (RO) membrane using a comb-shaped polymer which includes dissolving the comb-shaped polymer and a base in water to form a solution, contacting the fouled RO membrane with the solution to produce a cleaned RO membrane. The comb-shaped polymer includes reacted units of poly(isobutylene-alt-maleic anhydride) and an oligoethylene amine where, the oligoethylene amine is triethylenetetramine, tetraethylene pentaamine, or pentaethylenehexamine.

This invention discloses a photoelectrocatalyst and its preparation method, wherein the photoelectrocatalyst comprises Zn 2+ Ce 4+ Au; Zn 2+ Including ammonium acetate, zinc nitrate, and hexamethylenetetramine; Ce 4+ Including cerium nitrate, ammonium chloride, and potassium chloride; Au includes PVP, sodium citrate, potassium bromide, and chloroauric acid; Zn 2+ Ce 4+ The molar ratio of Au to Zn is... 2+ Ce 4+ Au = 1:0.5 ~ 1:2.5 * 10 ‑7 ~7.5*10 ‑7 This method uses electrodeposition to prepare ZnO as a substrate. Its vertically aligned one-dimensional (1D) nanostructures exhibit quantum size-dependent effects, effectively shortening the carrier diffusion distance. CeO2 coats the ZnO, forming a stable, acid- and alkali-resistant substrate material. CeO2 traps electrons from Ce... 4+ Restored to Ce 3+ This forms oxygen voids and Ce 3+ / Ce 4+ Electron pairs produce high catalytic activity.

The invention discloses a flame-retardant synergist, a preparation method thereof and a flame-retardant polypropylene composite.The preparation method of the flame-retardant synergist comprises the steps that soluble nickel salt, phenylphosphonic acid, hexamethylenetetramine and polyvinylpyrrolidone are taken and added into a reaction solvent, stirring is conducted for 0.5-2 h, and a mixed solution is obtained; the mixed solution is subjected to a reaction for 12-24 h at the temperature of 150-200 DEG C, and a lamellar nickel phenyl phosphate material, namely the flame retardant synergist, is prepared. The lamellar nickel phenyl phosphate material prepared in the invention can be used as a flame retardant synergist to be added into a polypropylene system, can reinforce the polypropylene material, and also can cooperate with a flame retardant to significantly improve the flame retardant property of the polypropylene material.

The invention relates to the technical field of environment-friendly materials, and provides an environment-friendly deplating agent for neodymium-iron-boron materials and a preparation method and a using method thereof.The deplating agent comprises, by weight, 1%-5% of ammonium carbonate, 5%-10% of sodium dihydrogen phosphate or trisodium phosphate, 1%-5% of sodium hydroxide, 10%-15% of potassium citrate and the balance deionized water. The cleaning agent comprises the following components in percentage by weight: 40-50% of a cleaning agent, 5-10% of amino triethanol, 15-20% of hexamethylenetetramine or ethylenediamine, 40-50% of deionized water, and 0.1-1% of a chelating agent and a surface repairing agent; wherein the surface repairing agent is a composition comprising 0.1-1% by weight of nanoparticles and 0.1-0.5% by weight of a rare earth element compound; the nanoparticles and the rare earth element compound are used for forming a complex for repairing small surface defects; the rare earth element compound comprises one or more of a dysprosium compound, a praseodymium compound and / or a samarium compound; the nano particles comprise nano neodymium oxide and nano iron oxide, and the mass ratio of the nano neodymium oxide to the nano iron oxide is (1: 1)-(2: 3).

A filtration membrane including a first layer having a triamine-functionalized polysilicate mesoporous material, a second layer including a polysulfone; and a third layer including a polyester terephthalate is described. An orthosilicate group of the triamine-functionalized polysilicate mesoporous material is bonded to a silicon atom of a silicon-containing triamine to form a triamine-functionalized polysilicate backbone, wherein the silicon-containing triamine and one or more tetramines are covalently crosslinked with terephthaloyl chloride to form a polyamide, and wherein the triamine-functionalized polysilicate mesoporous material has a hierarchical structure of MCM-41. The membrane is adapted for use selected from the use group consisting of oil and water separation, water treatment, desalination, and pharmaceutical filtration.

The invention discloses a modified molecular sieve for PSA nitrogen preparation and a preparation method and application thereof, and belongs to the technical field of gas separation materials. The modified molecular sieve comprises a silicon-aluminum molecular sieve matrix, a transition metal oxide and an organic amine compound; the molar ratio of SiO2 to Al2O3 of the silicon-aluminum molecular sieve matrix is 5-8; the transition metal oxide is a compound of copper oxide and cobalt oxide, the mass ratio of the copper oxide to the cobalt oxide is 2: 1, and the total loading amount of the transition metal oxide is 3%-8% of the mass of the silicon-aluminum molecular sieve matrix; the organic amine compound is ethylenediamine or triethylene tetramine, and the loading capacity of the organic amine compound is 1-5% of the mass of the silicon-aluminum molecular sieve matrix. The modified molecular sieve takes a silicon-aluminum molecular sieve as a matrix, bifunctional modification is performed by loading transition metal oxides (copper oxide and cobalt oxide) and an organic amine compound, and the synergistic effect of the modified molecular sieve and the silicon-aluminum molecular sieve is optimized, so that the limitation of the prior art is broken through, and the sustainable development of the ammonia synthesis industry is promoted.