1054 results about "Ethylenediamines" patented technology

The invention discloses an absorbable suture line for surgical suture and a preparation method thereof, and relates to the technical field of medical materials. The absorbable suture line for surgical suture is prepared from the following raw materials in parts by weight: 50 to 65 parts of polylactic acid, 15 to 20 parts of polyglycolic acid, 3 to 5 parts of sodium carboxymethyl cellulose, 3 to 8 parts of a toughening agent, 3 to 6 parts of an antibacterial agent, 0.3 to 0.8 part of a lubricating agent, 1 to 2 parts of sodium hyaluronate and 5 to 10 parts of polyvinyl alcohol. The toughening agent is obtained by reacting hydroxyethyl acrylate with ethylenediamine to generate a four-arm compound and then reacting with 6-caprolactone and DL-lactide. The absorbable suture line for surgical suture prepared by the invention has excellent tensile property and antibacterial property, and can meet the application requirements of clinical medical treatment.

The invention discloses an organic amine composite absorbent for carbon capture and application thereof, and belongs to the technical field of carbon dioxide capture, the organic amine composite absorbent for carbon capture is in a solution state and comprises the following components: a main agent, an auxiliary agent, an accelerant A, an accelerant B and water; wherein the mass ratio of the main agent to the auxiliary agent is 2: (1-2); the mass ratio of the auxiliary agent to the accelerant A is 2: (1-2); the mass ratio of the accelerant A to the accelerant B is 2: (1-2); the total mass concentration of the main agent, the auxiliary agent, the accelerant A and the accelerant B in the organic amine composite absorbent for carbon capture is 30-40 wt%; the main agent is selected from N-methyldiethanolamine or N, N-diethyl ethanolamine, the auxiliary agent is selected from piperazine or hydroxyethyl ethylenediamine, the accelerant A is selected from triethylene glycol monomethyl ether and / or ethylene glycol monomethyl ether, and the accelerant B is selected from ethyl butyl ether and / or isobutyl ether. The organic amine composite absorbent for carbon capture has a wide application prospect in removal of carbon dioxide in flue gas.

The invention discloses a preparation method of an In2O3-Cu-Cu2O ternary heterojunction catalyst and a preparation method of the In2O3-Cu-Cu2O ternary heterojunction catalyst. The method comprises the following steps: at room temperature and normal pressure, firstly, dissolving indium chloride tetrahydrate in a mixed solvent of ethylenediamine-ethylene glycol (the volume ratio is 1: 20-1: 30) and dihydric alcohol amine to obtain a homogeneous solution; then transferring the solution to a hydrothermal kettle, adding deionized water and Cu2O powder with different volumes, and carrying out hydrothermal crystallization at 160-200 DEG C for 10-14 hours; and centrifuging the obtained precipitate, alternately washing with water and alcohol for 2-3 times, carrying out vacuum drying at 60 DEG C for 5-7 hours, heating to 600 + / -10 DEG C at a speed of 3-5 DEG C / min in an N2 atmosphere, calcining for 3 hours, and cooling along with a furnace to obtain a target product. By adjusting the adding amount of the deionized water, the mass proportion of the three phases of In2O3, Cu and Cu2O can be continuously adjusted and controlled, and controllable preparation from'rich copper 'to'rich cuprous oxide' and'stable ternary 'is achieved.

The invention discloses a glue solution for a copper-clad plate and a preparation method of the glue solution, and relates to the technical field of copper-clad plates. According to the prepared glue solution for the copper-clad plate, the composite epoxy resin, the curing agent, the accelerant, the solvent, the flexibilizer and the inorganic filler, the composite epoxy resin comprises bisphenol A epoxy resin, epoxy phenyl polysiloxane, itaconic acid polyaryletherketone and hydroxyl-terminated fluorine-containing vinyl polysiloxane, so that the interface bonding force with the copper plate is enhanced; the dielectric constant and the dielectric loss are effectively reduced, the peel strength and the toughness of the material are also remarkably improved, and the toughening agent is modified polyether sulfone microspheres; the modified polyethersulfone microspheres are prepared by coating polyethersulfone microspheres with hexamethylenediamine tetrapropionamide diamine, the hexamethylenediamine tetrapropionamide diamine is prepared by carrying out acylation condensation reaction on hexamethylenediamine tetramethyl propionate and ethylenediamine, and the polyethersulfone microspheres are prepared by carrying out electrostatic spinning on a spinning solution of polyethersulfone and vinylpyridine, so that the peel strength of the glue solution is remarkably improved.

The invention belongs to the technical field of photovoltaic coatings, and discloses a photovoltaic coating as well as a preparation method and application thereof. The photovoltaic coating is prepared from the following raw materials: a solvent, an ultraviolet light absorber, a wetting agent, an antistatic agent, modified hydrophilic silicon dioxide, nano magnesium fluoride and nano tin dioxide, the modified hydrophilic silicon dioxide is hydrophilic silicon dioxide modified by ethylenediamine and glacial acetic acid. A coating formed by the photovoltaic coating is high in adhesive force and resistant to aging, and the light transmittance, the self-cleaning property and the antistatic property of photovoltaic glass can be obviously improved.

The invention relates to the technical field of battery current collectors, and discloses a high-conductivity stainless steel foil for a positive current collector and a preparation method of the high-conductivity stainless steel foil. Comprising the following operation steps that 1, stainless steel foil is subjected to acid pickling and then dried, the stainless steel foil is soaked in an ethylenediamine tetramethylenephosphonic acid ethanol solution to be stirred for 2-3 h in the nitrogen atmosphere, the stainless steel foil is taken out to be cleaned and cured for 3-4 h at the temperature of 120-125 DEG C, after the stainless steel foil is cooled to the room temperature, washing and nitrogen drying are conducted, and prefabricated stainless steel foil is obtained; and 2, the prefabricated stainless steel foil is soaked in the anti-oxidation conductive copper composite sol for 25-40 s, taken out, dried, coated with an aluminum grid, ground, soaked in the graphene / carbon nanotube composite sol for 20-30 s, taken out, dried for 4-6 min at the temperature of 100-120 DEG C, ground and dried, and the high-conductivity stainless steel foil is obtained.

The invention provides a gel composite adsorbent with a foaming structure as well as a preparation method and application thereof, and the preparation method comprises the following steps: S1, dissolving acrylamide powder in deionized water, and stirring to obtain a solution A; s2, dissolving sodium alginate in the solution A for thickening to obtain a solution B; s3, transferring the solution B into an ice-water bath; s4, adding N, N-methylene bisacrylamide into the solution B, stirring until the N, N-methylene bisacrylamide is completely dissolved, then adding N, N, N ', N'-tetramethylethylenediamine, and stirring until the N, N, N ', N'-tetramethylethylenediamine is uniform to obtain a solution C; s5, adding ammonium persulfate into the solution C, and stirring until the ammonium persulfate is completely dissolved to obtain a solution D; s6, the solution D is poured into a mold and then vacuumized to form gel, and a hydrogel sample is obtained after gel forming; s7, drying the hydrogel sample, and then soaking the dried hydrogel sample in a salt solution to obtain a soaked gel material; and S8, drying the soaked gel material to obtain the finished product composite adsorbent.

The invention provides an efficient and environment-friendly reverse osmosis membrane scale inhibition cleaning agent based on a composite formula, and relates to the field of reverse osmosis membrane cleaning. Comprising effective components and water, and the effective components comprise the following raw materials in percentage by mass: 10-15% of a surfactant, 10-15% of a sterilizing agent, 30-40% of a composite chelating agent, 10-20% of slow-release organic acid, 5-10% of compound enzyme, 5-10% of an oxidizing agent and 1-5% of a defoaming agent; the composite chelating agent is a compound which takes attapulgite and montmorillonite as carriers and is loaded with hydroxyethyl ethylenediamine triacetic acid trisodium salt; the slow-release organic acid is citric acid modified by carboxymethyl chitosan. The cleaning agent provided by the invention contains the composite chelating agent, the slow-release organic acid, the compound enzyme, the surfactant, the sterilizing agent and the like in effective components, is prepared into the cleaning agent with water, has the effect of efficiently cleaning the reverse osmosis membrane, and is high in cleaning efficiency and small in damage to the reverse osmosis membrane.

The invention discloses a preparation method and application of a wear-resistant TPE (thermoplastic elastomer) material for data lines, and the preparation method comprises the following steps: carrying out reaction on polytetrahydrofuran ether glycol and isophorone diisocyanate to form a polyurethane prepolymer, adding a reinforcing monomer and a modified filler, carrying out chain extension reaction, and finally adding ethylenediamine to prepare the wear-resistant TPE material. The TPE material is of a hyperbranched structure, the mechanical performance of the material can be improved, cross-linking points of the TPE material are increased by adding the modified filler, TPE material molecules form a stable grid shape, the wear resistance of the TPE material is further improved, a zinc organic framework is connected between the modified filler and a polyurethane prepolymer molecular chain, and the modified filler contains a six-membered ring structure, so that the wear resistance of the TPE material is improved. According to the present invention, the modified filler is added to the TPE material, such that the TPE material can well adapt to the surface contact when the TPE material is worn so as to reduce the wear, and the dynamic cross-linking of the modified filler and the TPE material molecules does not cause the substantial reduction of the toughness due to the increase of the cross-linking point so as to improve the bending resistance effect of the TPE material.

The invention discloses a preparation method of salt-resistant sodium carboxymethyl cellulose, and relates to the technical field of petroleum fracturing materials. The preparation method comprises the following steps: reacting stearic acid with ethylenediamine to obtain a monosubstituted intermediate, reacting the monosubstituted intermediate with cocoyl chloride to obtain an intermediate 1, reacting the intermediate 1 with epoxypropane to obtain an intermediate 2, and reacting the intermediate 2 with paratoluensulfonyl chloride to obtain a hydrophobic intermediate; reacting a sodium carboxymethyl cellulose solution with the hydrophobic intermediate to obtain modified sodium carboxymethyl cellulose, and sulfonating the modified sodium carboxymethyl cellulose with sulfamic acid to obtain crude salt-tolerant sodium carboxymethyl cellulose; and reacting the crude product salt-resistant sodium carboxymethyl cellulose with borax to obtain the salt-resistant sodium carboxymethyl cellulose. The salt-resistant sodium carboxymethyl cellulose prepared by adopting a step-by-step synthesis strategy has excellent salt resistance, temperature resistance, shearing resistance and dissolution rate, and is suitable for thickening and sand carrying of high-temperature and high-salt oil and gas field fracturing fluid.

The invention discloses a high-bonding-strength conductive adhesive and a preparation method and application thereof.The preparation method comprises the following steps that S1, epoxy resin E51 is placed in a three-neck flask, acetone is added, stirring is conducted till the epoxy resin E51 is completely dissolved, and ethidene diamine is slowly dropwise added; s2, under the protection of nitrogen, heating to 70-80 DEG C, adding a catalyst triphenylphosphine, carrying out a constant-temperature reaction, after the reaction is completed, cooling to 35-45 DEG C, adding deionized water, and stirring; s3, acetone and unreacted ethylenediamine are removed, then deionized water is used for washing, an obtained product is placed in a vacuum drying oven to be dried, and amino modified epoxy resin of faint yellow viscous liquid is obtained; s4, mixing the amino modified epoxy resin with an anhydride curing agent, a conductive filler, a diluent and a coupling agent; and S5, fully stirring the mixture, carrying out vacuum defoaming, and uniformly stirring to obtain the conductive adhesive. According to the invention, the shearing strength of the chip and the copper bracket can be improved to more than 30MPa.

The invention relates to the technical field of anti-yellowing, in particular to anti-yellowing lining cloth with a hot melt coating and a preparation method of the anti-yellowing lining cloth. Composite carbon dots, an anti-yellowing agent and a composite chitosan solution are adopted to prepare finishing liquid for finishing the lining cloth; the preparation method comprises the following steps: selecting furfural and urea as a carbon source and a nitrogen source, performing one-step hydrothermal synthesis to obtain a nitrogen-doped furfural-based carbon dot, and grafting an amino-terminated polyimidazolium salt antibacterial compound to obtain a composite carbon dot; wherein the amino-terminated polyimidazolium salt antibacterial compound is an amino-terminated halogen-free polyimidazolium salt antibacterial compound which is prepared by taking ethylenediamine, butyric acid, glyoxal and formaldehyde as raw materials based on amine-aldehyde polycondensation and has good biocompatibility; the preparation method comprises the following steps: by taking polybutylene adipate, toluene diisocynate and isophorone diisocyanate as main monomers, polypropylene oxide triol as a crosslinking monomer, 2, 2-dimethylolpropionic acid and 4, 4 '-diaminodiphenyl disulfide as chain extenders and composite carbon dots as an end-capping reagent, adding water and emulsifying to obtain the waterborne polyurethane hot melt adhesive.

The invention discloses a high-temperature-resistant and salt-resistant fracturing fluid and a preparation method thereof, and relates to the technical field of oil field fracturing fluids. When the high-temperature-resistant and salt-resistant fracturing fluid is prepared, sodium 3-chloro-2-hydroxypropane sulfonate, N, N-dimethylacrylamide and ethylene glycol react to prepare a quaternized solid product, and then the quaternized solid product reacts with 1-bromooctadecane to prepare an amphoteric hydrophobic monomer; guar gum powder reacts with 3-(1-naphthyloxy)-1, 2-epoxypropane to prepare naphthyloxy functionalized guar gum, and then the naphthyloxy functionalized guar gum, acrylamide and an amphoteric hydrophobic monomer are subjected to initiated polymerization through ceric ammonium nitrate to prepare modified guar gum; enabling zirconium oxychloride octahydrate, titanium chloride, lactic acid, ethanediamine and glycerol to react to prepare an organic zirconium cross-linking agent; and finally, mixing the modified guar gum, an organic zirconium cross-linking agent, sodium thiosulfate, sodium bromate, a surfactant and water to prepare the high-temperature-resistant and salt-resistant fracturing fluid. The high-temperature-resistant and salt-resistant fracturing fluid prepared by the invention has excellent high-temperature resistance and salt resistance.

The invention relates to the technical field of OLED (Organic Light Emitting Diode) manufacturing process etching processes, in particular to a silver etching solution for an OLED manufacturing process as well as a preparation method and application of the silver etching solution. The silver etching liquid comprises nitric acid, phosphoric acid, a buffer agent, a metal ion chelating agent and an ionic liquid inhibitor, the ionic liquid inhibitor comprises 1-butyl-3-methylimidazole phosphate, the metal ion chelating agent is selected from at least one of pyromellitic acid, diethylenetriamine pentaacetic acid and ethylenediamine tetramethylene phosphoric acid, and the buffer agent is selected from at least one of sodium chloride, sodium chloride and sodium chloride. The buffering agent comprises acetic acid, and all the components are prepared according to a specific mass ratio. The etching solution can balance the etching rate of silver and indium tin oxide, avoid silver residues and black spot defects, prolong the service life of the solution, reduce the use of a volatile buffer agent, adapt to the OLED fine manufacturing process, improve the product yield and reduce the production cost, and is suitable for etching of a metal substrate in the OLED manufacturing process.

The invention provides a compound or an N-oxide, a solvate, a pharmaceutically acceptable salt or a stereoisomer thereof, and also provides a composition containing the compound and application of the compound and the composition to delivery of a therapeutic agent or a prophylactic agent. According to the invention, the types of cationic lipid compounds are enriched, and more choices are provided for effective delivery of nucleic acid drugs, gene vaccines, small molecule drugs, polypeptides or protein drugs. After the lipid nanoparticles are formed with other lipid components, mRNA or drug molecules can be effectively delivered into cells to exert biological functions.

The invention discloses a self-repairing composite floor for a clean room and a preparation method of the self-repairing composite floor, and the preparation method comprises the following steps: carrying out amination treatment on nano silicon dioxide and carbon quantum dots by using a silane coupling agent, and sulfonating polyethersulfone ketone by using concentrated sulfuric acid; the preparation method comprises the following steps: carrying out curing treatment on epoxy resin, an amine curing agent, N-hydroxyethyl maleimide and tetrakis (3-mercaptopropionic acid) pentaerythritol ester to obtain epoxy-mercaptan resin; the preparation method comprises the following steps: carrying out prepolymerization reaction on vacuum dehydrated polyester polyol, tetrahydroxyethyl ethylenediamine, furanpropanol, diisocyanate, a catalyst, 2, 2 '-thiodiethanol and hydroxyl silicone oil to obtain a star-shaped polyurethane prepolymer, adding epoxy-thiol resin, glyceryl borate, sulfonated polyethersulfone ketone, aminated silicon dioxide, aminated carbon quantum dots and an auxiliary agent, carrying out ultrasonic treatment, and carrying out drying to obtain the star-shaped polyurethane resin. The self-repairing coating material is obtained; and coating the self-repairing coating material on the surface of a base plate, and performing hot-pressing curing molding to obtain the self-repairing composite floor for the clean room.

The invention discloses a preparation method and application of a metal sulfide adsorbent for adsorbing iodine and methyl iodide. The preparation method comprises the following steps: uniformly mixing an antimony source, a sulfur source, a deep eutectic solvent, polyamine and water to obtain a mixed solution; and transferring the mixed solution into a high-pressure reaction kettle, sealing, carrying out hydrothermal reaction at 110-220 DEG C for 2-9 days, cooling to room temperature to separate out crystals, and filtering, washing and drying to obtain the metal sulfide adsorbent. The invention also discloses application of the metal sulfide adsorbent in adsorption of iodine and methyl iodide. The metal sulfide adsorbent disclosed by the invention has a good adsorption effect on iodine and methyl iodide, and compared with an ethylenediamine-oriented metal sulfide adsorbent, the diethylenetriamine-oriented metal sulfide adsorbent has higher adsorption capacity on iodine and methyl iodide.

The invention discloses clethodim diamine salt as well as a preparation method and application thereof. The stability of the clethodim diamine salt (clethodim 1, 4-butanediamine salt, clethodim 1, 5-pentanediamine salt and clethodim 1, 6-hexamethylenediamine salt) provided by the invention is superior to that of clethodim and clethodim monoamine salt (such as clethodim tert-butylamine salt); meanwhile, the herbicidal activity of the clethodim diamine salt (clethodim ethylenediamine salt, clethodim 1, 4-butanediamine salt and clethodim 1, 5-pentanediamine salt) is superior to that of clethodim tert-butylamine salt, and the herbicidal activity of the clethodim 1, 5-pentanediamine salt is superior to that of clethodim. Most clethodim diamine salt is low in degradation rate in the high-temperature heat storage process and easier to store for a long time, the clethodim diamine salt is higher in melting point than clethodim monoamine salt (such as clethodim tert-butylamine salt), granulation and smashing are more convenient, the clethodim diamine salt can be used as a herbicide to be processed into solid dosage forms such as water dispersible granules and the like, the physical performance of the preparation is better, and the preparation has good application prospects. The commercialization prospect is good.

The invention relates to the technical field of sewage treatment, in particular to a preparation method of a degradable bactericide for an oil field. According to the invention, a hydroxypropyl guanidine gum-polycaprolactone-ethylenediamine fragment copolymer is taken as a carrier, a methylisothiazolinone quaternary ammonium salt (Q-MIT) bactericide is loaded, and the degradable bactericide for the oil field is obtained by cooperating with a dodecyl ethyl sulfide (TC-SE) bactericide and combining with sodium polyaspartate. A carrier forms a hydrogen bond with a polar group on the surface of a biological membrane through a hydroxypropyl guanidine gum main chain to realize targeted anchoring, a polycaprolactone branched chain encapsulates Q-MIT through a hydrophobic effect, primary amino groups of ethylenediamine are introduced to form a pH sensitive Schiff base bond with Q-MIT, and the primary amino groups and adipic dihydrazide form a thermal response hydrazide bond to construct a dual dynamic covalent bond, so that controlled release of Q-MIT is realized, and the biomembrane is prepared. And moreover, the components of the whole system are connected through degradable chemical bonds, so that the environmental protection property and sustainability of oil field operation are guaranteed.

The invention discloses a self-adaptive hydrogel coupling agent as well as a preparation method and application thereof, belongs to the field of medical instruments, and particularly relates to a preparation method of the self-adaptive hydrogel coupling agent. The preparation method comprises the following steps: dissolving a main monomer, a functional monomer, a molecular weight regulator and a reinforcing filler in sterilized deionized water under dark and sterile conditions, carrying out a free radical polymerization reaction under the action of a persulfate solution and tetramethylethylenediamine, and carrying out dialysis and sterilization treatment to obtain the self-adaptive hydrogel coupling agent. The self-adaptive hydrogel coupling agent prepared by the invention eliminates tissue deformation caused by probe pressurization, significantly improves the accuracy of measurement of the actual distance of a target by ultrasound in an operation, and meanwhile, the self-adaptive hydrogel coupling agent is good in biocompatibility, can be sterile, is convenient to operate, and is suitable for open or endoscopic surgical wounds.

The invention discloses a plant-based deodorant and a preparation method thereof, and relates to the technical field of high polymer materials. When the plant-based deodorant is prepared, beta-cyclodextrin reacts with paratoluensulfonyl chloride and then reacts with ethylenediamine, and amino modified cyclodextrin is prepared; the plant-based extract is subjected to inclusion with amino modified cyclodextrin, and a cyclodextrin inclusion compound is prepared; the preparation method comprises the following steps: reacting hydroxyethyl cellulose with methacrylic anhydride to prepare double-bond modified cellulose; carrying out hydrothermal reaction on titanium sulfate, the carboxylated multi-walled carbon nanotube, ammonium fluoride and cerous nitrate to prepare a co-doped titanium dioxide / carbon nanotube; coating the co-doped titanium dioxide / carbon nano-tubes with oleic acid to prepare modified nano-particles; and reacting the double-bond modified cellulose with the cyclodextrin inclusion compound, and then copolymerizing with the modified nanoparticles and the comonomer to obtain the plant-based deodorant. The prepared plant-based deodorant has the advantages of good deodorization effect, slow release and photocatalytic degradation.

The application discloses a preparation method of graphene aerogel and application thereof, and the graphene aerogel is prepared from a three-dimensional network of graphene oxide as a continuous matrix, hydrophilic polyimide fibers as a reinforcing framework, and metal-organic coordination bonds as functional nodes by coordinating cobalt ions with ethylenediamine tetramethylene phosphonic acid, and is prepared through a hydrothermal reaction, freeze drying and high-temperature annealing; the preparation method is simple, the process is easy to control, the electromagnetic shielding performance of the prepared graphene aerogel reaches 48 dB, and the graphene aerogel has good mechanical stability in the range of-75 to 150 DEG C; under a pressure of 1 kg, the compression time and recovery time of the graphene aerogel are 30 ms and 27 ms respectively, and the graphene aerogel meets the commercial standards of sensing materials and shielding materials.

The present invention relates to a method for preparing a DDR molecular sieve membrane. The method comprises preparing a seed suspension of Sigma-1 molecular sieve seeds obtained by ball milling, and coating the seed suspension onto a support. A synthesis solution is prepared by hydrothermal synthesis of a mixture of adamantaneamine, ethyleneamine, deionized water, and silica sol. The membrane is then calcined with ozone to obtain an activated DDR molecular sieve membrane. Compared to the prior art, the method employs a high-boiling-point ethyleneamine compound as a mineralizer, thereby eliminating the problem of toxic gas volatilization associated with the use of ethylenediamine as a mineralizer. Furthermore, the thickness of the prepared DDR molecular sieve membrane is significantly reduced.

The invention provides a bridge anti-disturbance concrete material and a preparation method thereof, and belongs to the technical field of building materials, the bridge anti-disturbance concrete material comprises a gel material, a reinforcing material and a functional additive; the reinforcing material comprises fibers, modified styrene butadiene rubber particles and self-repairing capsules; the self-repairing capsule comprises a water phase and an oil phase, the water phase contains nano calcium oxide, and the oil phase contains an HDI-ethylenediamine copolymer. The invention provides a bridge anti-disturbance concrete material and a preparation method thereof. The adaptability of concrete to high-frequency vibration and extremely low-temperature environments is improved.

The invention provides a preparation method of an insecticide synergistic responsive release delivery system, and belongs to the technical field of insecticides. Chlorantraniliprole insecticide is dissolved in an acetone solvent containing Tween 80 to form a drug-carrier complex; then polymerizing the N-isopropylacrylamide temperature-sensitive monomer under the action of an ammonium persulfate and tetramethylethylenediamine initiation system to form a temperature-responsive hydrogel matrix; four key parameters including the optimal molar ratio, the optimal embedding temperature, the optimal embedding time and the optimal phase change temperature control precision of an amido hydrophilic group and an isopropyl hydrophobic group are calculated by applying a double-layer game model, and a drug-carrier complex is embedded into a hydrogel matrix through a physical embedding effect to construct a three-layer nested delivery structure; the technical problem that the pesticide effect utilization rate is low due to the fact that the pesticide lacks an accurate temperature-responsive release control mechanism in environmental application is solved.

The invention relates to the technical field of gel material preparation, in particular to a bio-based gel material for dangerous chemical leakage disposal and a preparation method thereof.The preparation method comprises the steps that gelatin and deionized water are added into a reaction container, a gelatin solution is obtained under the preset dissolution condition, alkaline protease is added into the gelatin solution for an enzymolysis reaction, and a gelatin solution is obtained; a modified gelatin solution is obtained; the preparation method comprises the following steps: adding a phytic acid-chitosan compound and magnesium-aluminum layered double hydroxide into dispersion equipment, and obtaining a composite inorganic matter dispersion liquid under a preset dispersion condition; adding the modified gelatin solution, the composite inorganic substance dispersion liquid, polyethylene glycol and phase change microcapsules into a mixing reactor, and obtaining a premixed solution under a preset mixing condition; sequentially adding an initiator, a cross-linking agent and tetramethylethylenediamine into the premixed liquid, and performing cross-linking reaction under preset cross-linking conditions to obtain a bio-based gel initial product. The plugging efficiency of the bio-based gel material on dangerous chemical leakage is improved.

The invention relates to the technical field of electroplating, in particular to a nickel stripping agent, a preparation method of the nickel stripping agent and a nickel plating layer stripping method. The nickel stripping agent comprises the following raw materials: an oxidizing agent, a complexing agent, a dissolution promoter, a surfactant and a corrosion inhibitor, wherein the mass ratio of the oxidizing agent to the complexing agent to the dissolution promoter to the surfactant to the corrosion inhibitor is (4-15): (3-25): (1-11): (0.01-1): (0.01-5); wherein the oxidizing agent is nitrobenzoic acid; the complexing agent is one or more of 2-amino-2-methyl-1-propyl alcohol, acetylacetone, nitrilotriacetic acid, nitrilotriacetic acid sodium salt, acrylate, sodium gluconate and ethylenediamine hydrochloride; the dissolution promoter is an alcohol ether solvent. According to the nickel stripping agent, the oxidizing agent with relatively low toxicity and a non-toxic or low-toxicity non-volatile complexing system are adopted, nickel can be completely removed, a base material cannot be eroded, and the threat to the health of operators can be remarkably reduced.

The invention belongs to the field of catalyst preparation, and particularly relates to a platinum-based bimetallic propane dehydrogenation catalyst and a preparation method thereof. The method comprises the following steps: firstly, weighing beta molecular sieve powder, adding into a concentrated nitric acid solution, stirring and refluxing at high temperature, centrifugally washing, and drying to obtain a dealuminated beta molecular sieve; then calcining the metal additive oxide powder and the dealuminated beta molecular sieve in a reducing atmosphere to obtain composite beta molecular sieve powder; then weighing platinum precursor salt, dissolving the platinum precursor salt in ultrapure water to form a solution, and then adding ethylenediamine for coordination; and finally, impregnating the composite beta molecular sieve with a platinum precursor solution, and carrying out aging, drying and high-temperature treatment to obtain the dealumination beta molecular sieve loaded platinum-based bimetallic catalyst. According to the method provided by the invention, the metal is spontaneously and highly dispersed on the carrier by utilizing the capturing effect of the beta molecular sieve silanol nest on the metal and combining the dynamic migration behavior of the metal under high-temperature reduction. The prepared catalyst shows extremely high propane conversion activity and selectivity at 600 DEG C, and is excellent in stability.

The invention relates to the technical field of batteries, in particular to a low-hydrogen-evolution graphene material for a lead-acid battery and a preparation method thereof.The method comprises the steps that firstly, ethidene diamine is grafted to the surface of graphene oxide through a carbodiimide / active ester method, and aminated graphene is obtained; performing heat treatment in a nitrogen / ammonia gas atmosphere to realize nitrogen doping; compounding with titanium dioxide, and carrying out hydrothermal reaction to form a stable structure; then, sequentially grafting imidazolium silane and perfluorodecyl silane to carry out hydrophobic modification; and finally, stabilization and low-temperature re-nitridation curing are carried out through titanium tetrabutoxide. The graphene material prepared by the method endows the battery with excellent performance, and is low in direct-current internal resistance and high in capacity retention ratio.

The invention discloses a modified waterborne polyurethane adhesive and a preparation method thereof, and relates to the technical field of adhesives. The carbon dioxide-based polycarbonate polyol is prepared from the following raw materials in parts by mass: 70 to 84 parts of carbon dioxide-based polycarbonate polyol, 8 to 9.6 parts of hexamethylene diisocyanate, 3 to 3.6 parts of isophorone diisocyanate, 0.01 to 0.012 part of dibutyltin dilaurate, 10 to 12 parts of N-methyl pyrrolidone, 3.5 to 4.2 parts of dimethylolpropionic acid, 0.1 to 0.5 part of 1, 3-butanediol, 0.1 to 0.5 part of a catalyst and 0.1 to 0.5 part of a catalyst. The adhesive is prepared from the following components in parts by weight: 1 to 1.2 parts of 1, 4-butanediol, 21 to 25.2 parts of modified polyurethane dispersion, 2 to 2.5 parts of silane-terminated dynamic cross-linking agent, 2.8 to 3.4 parts of triethylamine, 40 to 60 parts of acetone, 200 to 220 parts of deionized water and 10 to 12 parts of ethylenediamine aqueous solution. By introducing the modified polyurethane dispersion and the silane-terminated dynamic cross-linking agent, the base material universality, water resistance and temperature resistance of the adhesive are effectively improved.